diff --git a/.travis.yml b/.travis.yml
index 7197b06..2b2dbac 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 # This is the config file for Travis-ci.org
 
 sudo: required
+dist: focal
 
 # Avoid consuming our GitHub LFS quota
 git:
diff --git a/copyright_and_licenses.csv b/copyright_and_licenses.csv
index 1e34167..09fd15f 100644
--- a/copyright_and_licenses.csv
+++ b/copyright_and_licenses.csv
@@ -363,5 +363,32 @@ us_noaa_wshpgn.tif,Disclaimed,Public domain,,
 us_noaa_wthpgn.tif,Disclaimed,Public domain,,
 us_noaa_wvhpgn.tif,Disclaimed,Public domain,,
 us_noaa_wyhpgn.tif,Disclaimed,Public domain,,
+us_noaa_nadcon5_as62_nad83_1993_as.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_gu63_nad83_1993_guamcnmi.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad27_nad83_1986_alaska.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad27_nad83_1986_conus.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1986_nad83_1992_alaska.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1986_nad83_1993_hawaii.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1986_nad83_1993_prvi.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1986_nad83_harn_conus.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1992_nad83_2007_alaska.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1993_nad83_1997_prvi.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1993_nad83_2002_as.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1993_nad83_2002_guamcnmi.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1993_nad83_pa11_hawaii.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_1997_nad83_2002_prvi.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_2002_nad83_2007_prvi.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_2002_nad83_ma11_guamcnmi.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_2002_nad83_pa11_as.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_2007_nad83_2011_alaska.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_2007_nad83_2011_conus.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_2007_nad83_2011_prvi.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_fbn_nad83_2007_conus.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_nad83_harn_nad83_fbn_conus.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_ohd_nad83_1986_hawaii.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_pr40_nad83_1986_prvi.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_sg1952_nad83_1986_stgeorge.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_sl1952_nad83_1986_stlawrence.tif,Disclaimed,Public domain,1.13,
+us_noaa_nadcon5_sp1952_nad83_1986_stpaul.tif,Disclaimed,Public domain,1.13,
 za_cdngi_README.txt,Disclaimed,Public domain,1.8,
 za_cdngi_sageoid2010.tif,Chief Directorate: National Geospatial Information (CD:NGI) South Africa,CC-BY-4.0,1.8,
diff --git a/grid_tools/check_gtiff_grid.py b/grid_tools/check_gtiff_grid.py
index 977362d..35cd5c5 100755
--- a/grid_tools/check_gtiff_grid.py
+++ b/grid_tools/check_gtiff_grid.py
@@ -75,7 +75,7 @@ def get_srs(ds, epsg_code_key, wkt_key, is_first_subds, infos, warnings, errors)
     return srs
 
 
-def validate_horizontal_offset(ds, is_first_subds):
+def validate_horizontal_offset(type, ds, is_first_subds):
 
     infos = []
     warnings = []
@@ -88,10 +88,16 @@ def validate_horizontal_offset(ds, is_first_subds):
             warnings.append("target_crs found, but not a Geographic CRS")
 
     if ds.RasterCount < 2:
-        return infos, warnings, ["TYPE=HORIZONTAL_OFFSET should have at least 2 bands"]
+        return infos, warnings, [f"TYPE={type} should have at least 2 bands"]
+    if type == "GEOGRAPHIC_3D_OFFSET":
+        if ds.RasterCount < 3:
+            return infos, warnings, [f"TYPE={type} should have at least 3 bands"]
+        if target_crs.GetAxesCount() != 3:
+            warnings.append("target_crs found, but not a Geographic 3D CRS")
 
     lat_offset_idx = 0
     lon_offset_idx = 0
+    eht_offset_idx = 0
     lat_accuracy_idx = 0
     lon_accuracy_idx = 0
     for i in range(ds.RasterCount):
@@ -105,6 +111,10 @@ def validate_horizontal_offset(ds, is_first_subds):
             if lon_offset_idx > 0:
                 return infos, warnings, ["At least, 2 bands are tagged with Description = longitude_offset"]
             lon_offset_idx = i+1
+        elif desc == 'ellipsoidal_height_offset':
+            if eht_offset_idx > 0:
+                return infos, warnings, ["At least, 3 bands are tagged with Description = ellipsoidal_height_offset"]
+            eht_offset_idx = i+1
         elif desc == 'latitude_offset_accuracy':
             lat_accuracy_idx = i+1
         elif desc == 'longitude_offset_accuracy':
@@ -125,6 +135,16 @@ def validate_horizontal_offset(ds, is_first_subds):
         lat_offset_idx = 1
         lon_offset_idx = 2
 
+    if type == "GEOGRAPHIC_3D_OFFSET":
+        if eht_offset_idx == 0:
+            return infos, warnings, ["No band with Description = ellipsoidal_height_offset"]
+        if eht_offset_idx != 3:
+            infos.append(
+                'Usually the 3rd band should be ellipsoidal_height_offset.')
+    else:
+        if eht_offset_idx != 0:
+            return infos, warnings, ["Band with Description = ellipsoidal_height_offset found, but not expected"]
+
     for idx in (lat_offset_idx, lon_offset_idx):
         band = ds.GetRasterBand(idx)
         if band.GetNoDataValue():
@@ -149,6 +169,19 @@ def validate_horizontal_offset(ds, is_first_subds):
         errors.append("positive_value=%s not supported by PROJ" %
                       positive_value)
 
+    if eht_offset_idx > 0:
+        band = ds.GetRasterBand(eht_offset_idx)
+        if band.GetNoDataValue():
+            warnings.append(
+                "ellipsoidal_height_offset band has a nodata setting. Nodata for horizontal shift grids is ignored by PROJ")
+        units = band.GetUnitType()
+        if not units:
+            warnings.append(
+                "ellipsoidal_height_offset band is missing units description. metre will be assumed")
+        elif units not in ('metre',):
+            errors.append(
+                "ellipsoidal_height_offset band is using a unit not supported by PROJ")
+
     if lat_accuracy_idx > 0 and lon_accuracy_idx > 0:
         if lat_accuracy_idx != 3 or lon_accuracy_idx != 4:
             infos.append(
@@ -264,6 +297,56 @@ def validate_vertical_offset_vertical_to_vertical(ds, is_first_subds):
     return infos, warnings, errors
 
 
+def validate_ellipsoidal_height_offset(ds, is_first_subds):
+
+    infos = []
+    warnings = []
+    errors = []
+
+    source_crs = ds.GetSpatialRef()
+    if source_crs:
+        if not source_crs.IsGeographic():
+            errors.append("source_crs found, but not a Geographic CRS")
+
+    target_crs = get_srs(ds, 'target_crs_epsg_code', 'target_crs_wkt',
+                         is_first_subds, infos, warnings, errors)
+    if target_crs:
+        if not target_crs.IsGeographic():
+            errors.append("target_crs found, but not a Geographic CRS")
+
+    offset_idx = 0
+    for i in range(ds.RasterCount):
+        b = ds.GetRasterBand(i+1)
+        desc = b.GetDescription()
+        if desc == 'ellipsoidal_height_offset':
+            if offset_idx > 0:
+                return infos, warnings, ["At least, 2 bands are tagged with Description = ellipsoidal_height_offset"]
+            offset_idx = i+1
+        elif desc:
+            infos.append('Band of type %s not recognized by PROJ' % desc)
+
+    if offset_idx == 0:
+        if is_first_subds:
+            warnings.append(
+                'No explicit band tagged with Description = ellipsoidal_height_offset. Assuming first one')
+        offset_idx = 1
+
+    if offset_idx != 1:
+        infos.append(
+            'Usually the first band should be ellipsoidal_height_offset.')
+
+    units = ds.GetRasterBand(offset_idx).GetUnitType()
+    if not units:
+        if is_first_subds:
+            warnings.append(
+                "ellipsoidal_height_offset band is missing units description. Metre will be assumed")
+    elif units not in ('metre', ):
+        errors.append(
+            "ellipsoidal_height_offset band is using a unit not supported by PROJ")
+
+    return infos, warnings, errors
+
+
 def validate_geocentric_translation(ds, is_first_subds):
 
     infos = []
@@ -408,7 +491,7 @@ def validate_defmodel(ds, is_first_subds, first_subds):
                                    'HORIZONTAL',
                                    'VERTICAL',
                                    '3D'):
-        warnings.append("DISPLACEMENT_TYPE=%s is not recognize by PROJ" % displacement_type)
+        warnings.append("DISPLACEMENT_TYPE=%s is not recognized by PROJ" % displacement_type)
 
     uncertainty_type = ds.GetMetadataItem('UNCERTAINTY_TYPE')
     if not displacement_type:
@@ -420,7 +503,7 @@ def validate_defmodel(ds, is_first_subds, first_subds):
                                   'HORIZONTAL',
                                   'VERTICAL',
                                   '3D'):
-        warnings.append("UNCERTAINTY_TYPE=%s is not recognize by PROJ" % uncertainty_type)
+        warnings.append("UNCERTAINTY_TYPE=%s is not recognized by PROJ" % uncertainty_type)
 
     if displacement_type == 'HORIZONTAL':
         min_expected_band_count = 2
@@ -577,10 +660,12 @@ def validate_ifd(global_info, ds, is_first_subds, first_subds):
     elif type not in ('HORIZONTAL_OFFSET',
                       'VERTICAL_OFFSET_GEOGRAPHIC_TO_VERTICAL',
                       'VERTICAL_OFFSET_VERTICAL_TO_VERTICAL',
+                      'GEOGRAPHIC_3D_OFFSET',
+                      'ELLIPSOIDAL_HEIGHT_OFFSET',
                       'GEOCENTRIC_TRANSLATION',
                       'VELOCITY',
                       'DEFORMATION_MODEL',):
-        warnings.append("TYPE=%s is not recognize by PROJ" % type)
+        warnings.append("TYPE=%s is not recognized by PROJ" % type)
 
     if is_first_subds:
         if not ds.GetMetadataItem('area_of_use'):
@@ -627,8 +712,8 @@ def validate_ifd(global_info, ds, is_first_subds, first_subds):
         warnings.append(
             'Image uses %s compression. Might cause compatibility problems' % compression)
 
-    if type == 'HORIZONTAL_OFFSET':
-        i, w, e = validate_horizontal_offset(ds, is_first_subds)
+    if type in ('HORIZONTAL_OFFSET', 'GEOGRAPHIC_3D_OFFSET'):
+        i, w, e = validate_horizontal_offset(type, ds, is_first_subds)
         infos += i
         warnings += w
         errors += e
@@ -659,6 +744,11 @@ def validate_ifd(global_info, ds, is_first_subds, first_subds):
         infos += i
         warnings += w
         errors += e
+    elif type == 'ELLIPSOIDAL_HEIGHT_OFFSET':
+        i, w, e = validate_ellipsoidal_height_offset(ds, is_first_subds)
+        infos += i
+        warnings += w
+        errors += e
 
     grid_name = ds.GetMetadataItem('grid_name')
     if grid_name:
@@ -707,7 +797,9 @@ def validate_ifd(global_info, ds, is_first_subds, first_subds):
                        'number_of_nested_grids',
                        'UNCERTAINTY_TYPE',
                        'DISPLACEMENT_TYPE',
-                       'UNCERTAINTY_TYPE',):
+                       'UNCERTAINTY_TYPE',
+                       'interpolation_method',
+                       'auxiliary_data',):
             infos.append('Metadata %s=%s ignored' % (key, md[key]))
 
     for i in range(ds.RasterCount):
diff --git a/travis/expected_main.lst b/travis/expected_main.lst
index 43a8dde..ea4795e 100644
--- a/travis/expected_main.lst
+++ b/travis/expected_main.lst
@@ -327,6 +327,33 @@ us_noaa_mihpgn.tif
 us_noaa_mnhpgn.tif
 us_noaa_mohpgn.tif
 us_noaa_mshpgn.tif
+us_noaa_nadcon5_as62_nad83_1993_as.tif
+us_noaa_nadcon5_gu63_nad83_1993_guamcnmi.tif
+us_noaa_nadcon5_nad27_nad83_1986_alaska.tif
+us_noaa_nadcon5_nad27_nad83_1986_conus.tif
+us_noaa_nadcon5_nad83_1986_nad83_1992_alaska.tif
+us_noaa_nadcon5_nad83_1986_nad83_1993_hawaii.tif
+us_noaa_nadcon5_nad83_1986_nad83_1993_prvi.tif
+us_noaa_nadcon5_nad83_1986_nad83_harn_conus.tif
+us_noaa_nadcon5_nad83_1992_nad83_2007_alaska.tif
+us_noaa_nadcon5_nad83_1993_nad83_1997_prvi.tif
+us_noaa_nadcon5_nad83_1993_nad83_2002_as.tif
+us_noaa_nadcon5_nad83_1993_nad83_2002_guamcnmi.tif
+us_noaa_nadcon5_nad83_1993_nad83_pa11_hawaii.tif
+us_noaa_nadcon5_nad83_1997_nad83_2002_prvi.tif
+us_noaa_nadcon5_nad83_2002_nad83_2007_prvi.tif
+us_noaa_nadcon5_nad83_2002_nad83_ma11_guamcnmi.tif
+us_noaa_nadcon5_nad83_2002_nad83_pa11_as.tif
+us_noaa_nadcon5_nad83_2007_nad83_2011_alaska.tif
+us_noaa_nadcon5_nad83_2007_nad83_2011_conus.tif
+us_noaa_nadcon5_nad83_2007_nad83_2011_prvi.tif
+us_noaa_nadcon5_nad83_fbn_nad83_2007_conus.tif
+us_noaa_nadcon5_nad83_harn_nad83_fbn_conus.tif
+us_noaa_nadcon5_ohd_nad83_1986_hawaii.tif
+us_noaa_nadcon5_pr40_nad83_1986_prvi.tif
+us_noaa_nadcon5_sg1952_nad83_1986_stgeorge.tif
+us_noaa_nadcon5_sl1952_nad83_1986_stlawrence.tif
+us_noaa_nadcon5_sp1952_nad83_1986_stpaul.tif
 us_noaa_nbhpgn.tif
 us_noaa_nchpgn.tif
 us_noaa_ndhpgn.tif
diff --git a/us_noaa/build_nadcon5.py b/us_noaa/build_nadcon5.py
new file mode 100755
index 0000000..03a4584
--- /dev/null
+++ b/us_noaa/build_nadcon5.py
@@ -0,0 +1,374 @@
+from osgeo import gdal, osr
+import os
+import requests
+
+import sys
+sys.path.append("../grid_tools")
+from cloud_optimize_gtiff import generate_optimized_file
+
+base_url = "https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds"
+
+build_number = "20160901"
+subdirs = ["as62.nad83_1993.as",
+           "gu63.nad83_1993.guamcnmi",
+           "nad27.nad83_1986.alaska",
+           "nad27.nad83_1986.conus",
+           "nad83_1986.nad83_1992.alaska",
+           "nad83_1986.nad83_1993.hawaii",
+           "nad83_1986.nad83_1993.prvi",
+           "nad83_1986.nad83_harn.conus",
+           "nad83_1992.nad83_2007.alaska",
+           "nad83_1993.nad83_1997.prvi",
+           "nad83_1993.nad83_2002.as",
+           "nad83_1993.nad83_2002.guamcnmi",
+           "nad83_1993.nad83_pa11.hawaii",
+           "nad83_1997.nad83_2002.prvi",
+           "nad83_2002.nad83_2007.prvi",
+           "nad83_2002.nad83_ma11.guamcnmi",
+           "nad83_2002.nad83_pa11.as",
+           "nad83_2007.nad83_2011.alaska",
+           "nad83_2007.nad83_2011.conus",
+           "nad83_2007.nad83_2011.prvi",
+           "nad83_fbn.nad83_2007.conus",
+           "nad83_harn.nad83_fbn.conus",
+           "ohd.nad83_1986.hawaii",
+           "pr40.nad83_1986.prvi",
+           #"sg1897.sg1952.stgeorge",
+           "sg1952.nad83_1986.stgeorge",
+           "sl1952.nad83_1986.stlawrence",
+           #"sp1897.sp1952.stpaul",
+           "sp1952.nad83_1986.stpaul",
+           #"ussd.nad27.conus",
+]
+
+d = {
+    "as62.nad83_1993.as": {
+        "source_crs": "EPSG:4169",
+        "target_crs": "EPSG:4152",
+        "area_of_use": "USA - American Samoa",
+    },
+    "gu63.nad83_1993.guamcnmi": {
+        "source_crs": "EPSG:4675",
+        "target_crs": "EPSG:4152",
+        "area_of_use": "USA - Guam and the Commonwealth of the Northern Mariana Islands",
+    },
+    "nad27.nad83_1986.alaska": {
+        "source_crs": "EPSG:4267",
+        "target_crs": "EPSG:4269",
+        "area_of_use": "USA - Alaska",
+    },
+    "nad27.nad83_1986.conus": {
+        "source_crs": "EPSG:4267",
+        "target_crs": "EPSG:4269",
+        "area_of_use": "USA - Conterminous",
+    },
+    "nad83_1986.nad83_1992.alaska": {
+        "source_crs": "EPSG:4269",
+        "target_crs": "EPSG:4152",
+        "area_of_use": "USA - Alaska",
+    },
+    "nad83_1986.nad83_1993.hawaii": {
+        "source_crs": "EPSG:4269",
+        "target_crs": "EPSG:4152",
+        "area_of_use": "USA - Hawaii",
+    },
+    "nad83_1986.nad83_1993.prvi": {
+        "source_crs": "EPSG:4269",
+        "target_crs": "EPSG:4152",
+        "area_of_use": "USA - Puerto Rico and the Virgin Islands",
+    },
+    "nad83_1986.nad83_harn.conus": {
+        "source_crs": "EPSG:4269",
+        "target_crs": "EPSG:4152",
+        "area_of_use": "USA - Conterminous",
+    },
+    "nad83_1992.nad83_2007.alaska": {
+        "source_crs": "EPSG:4152",
+        "target_crs": "EPSG:4759",
+        "area_of_use": "USA - Alaska",
+    },
+    "nad83_1993.nad83_1997.prvi": {
+        "source_crs": "EPSG:4152",
+        "target_crs": "EPSG:8545",
+        "area_of_use": "USA - Puerto Rico and the Virgin Islands",
+    },
+    "nad83_1993.nad83_2002.as": {
+        "source_crs": "EPSG:4152",
+        "target_crs": "EPSG:8860",
+        "area_of_use": "USA - American Samoa",
+    },
+    "nad83_1993.nad83_2002.guamcnmi": {
+        "source_crs": "EPSG:4152",
+        "target_crs": "EPSG:8860",
+        "area_of_use": "USA - Guam and the Commonwealth of the Northern Mariana Islands",
+    },
+    "nad83_1993.nad83_pa11.hawaii": {
+        "source_crs": "EPSG:4152",
+        "target_crs": "EPSG:6322",
+        "area_of_use": "USA - Hawaii",
+    },
+    "nad83_1997.nad83_2002.prvi": {
+        "source_crs": "EPSG:8545",
+        "target_crs": "EPSG:8860",
+        "area_of_use": "USA - Puerto Rico and the Virgin Islands",
+    },
+    "nad83_2002.nad83_2007.prvi": {
+        "source_crs": "EPSG:8860",
+        "target_crs": "EPSG:4759",
+        "area_of_use": "USA - Puerto Rico and the Virgin Islands",
+    },
+    "nad83_2002.nad83_ma11.guamcnmi": {
+        "source_crs": "EPSG:8860",
+        "target_crs": "EPSG:6325",
+        "area_of_use": "USA - Guam and the Commonwealth of the Northern Mariana Islands",
+    },
+    "nad83_2002.nad83_pa11.as": {
+        "source_crs": "EPSG:8860",
+        "target_crs": "EPSG:6322",
+        "area_of_use": "USA - American Samoaa",
+    },
+    "nad83_2007.nad83_2011.alaska": {
+        "source_crs": "EPSG:4759",
+        "target_crs": "EPSG:6318",
+        "area_of_use": "USA - Alaska",
+    },
+    "nad83_2007.nad83_2011.conus": {
+        "source_crs": "EPSG:4759",
+        "target_crs": "EPSG:6318",
+        "area_of_use": "USA - Conterminous",
+    },
+    "nad83_2007.nad83_2011.prvi": {
+        "source_crs": "EPSG:4759",
+        "target_crs": "EPSG:6318",
+        "area_of_use": "USA - Puerto Rico and the Virgin Islands",
+    },
+    "nad83_fbn.nad83_2007.conus": {
+        "source_crs": "EPSG:8860",
+        "target_crs": "EPSG:4759",
+        "area_of_use": "USA - Conterminous",
+    },
+    "nad83_harn.nad83_fbn.conus": {
+        "source_crs": "EPSG:4152",
+        "target_crs": "EPSG:8860",
+        "area_of_use": "USA - Conterminous",
+    },
+    "ohd.nad83_1986.hawaii": {
+        "source_crs": "EPSG:4135",
+        "target_crs": "EPSG:4269",
+        "area_of_use": "USA - Hawaii",
+    },
+    "pr40.nad83_1986.prvi": {
+        "source_crs": "EPSG:4139",
+        "target_crs": "EPSG:4269",
+        "area_of_use": "USA - Puerto Rico and the Virgin Islands",
+    },
+    #"sg1897.sg1952.stgeorge",
+    "sg1952.nad83_1986.stgeorge": {
+        "source_crs": "EPSG:4138",
+        "target_crs": "EPSG:4269",
+        "area_of_use": "USA - Saint George Island",
+    },
+    "sl1952.nad83_1986.stlawrence": {
+        "source_crs": "EPSG:4136",
+        "target_crs": "EPSG:4269",
+        "area_of_use": "USA - Saint Lawrence Island",
+    },
+    #"sp1897.sp1952.stpaul",
+    "sp1952.nad83_1986.stpaul": {
+        "source_crs": "EPSG:4137",
+        "target_crs": "EPSG:4269",
+        "area_of_use": "USA - Saint Lawrence Island",
+    },
+#"ussd.nad27.conus",
+}
+
+os.makedirs("nadcon5", exist_ok=True)
+
+readme_txt = ""
+
+for subdir in subdirs:
+
+    lat_filename = "nadcon5." + subdir + ".lat.trn." + build_number + ".b"
+    out_filename = "nadcon5/" + lat_filename
+    if not os.path.exists(out_filename):
+        url = base_url + "/" + subdir + "/" + lat_filename
+        print(f"Fetch {url}...")
+        r = requests.get(url)
+        open(out_filename, "wb").write(r.content)
+        ds = gdal.Open(out_filename)
+        assert ds.GetRasterBand(1).Checksum() >= 0
+
+    lon_filename = "nadcon5." + subdir + ".lon.trn." + build_number + ".b"
+    out_filename = "nadcon5/" + lon_filename
+    if not os.path.exists(out_filename):
+        url = base_url + "/" + subdir + "/" + lon_filename
+        print(f"Fetch {url}...")
+        r = requests.get(url)
+        open(out_filename, "wb").write(r.content)
+        ds = gdal.Open(out_filename)
+        assert ds.GetRasterBand(1).Checksum() >= 0
+
+    has_ellipsoidal_height_shift = ("nad83_2007" in subdir or "nad83_1997" in subdir or "nad83_2002" in subdir or "nad83_pa11" in subdir or "nad83_fbn" in subdir)
+    if has_ellipsoidal_height_shift:
+        eht_filename = "nadcon5." + subdir + ".eht.trn." + build_number + ".b"
+        out_filename = "nadcon5/" + eht_filename
+        if not os.path.exists(out_filename):
+            url = base_url + "/" + subdir + "/" + eht_filename
+            print(f"Fetch {url}...")
+            r = requests.get(url)
+            open(out_filename, "wb").write(r.content)
+            ds = gdal.Open(out_filename)
+            assert ds.GetRasterBand(1).Checksum() >= 0
+
+    source_crs_code = d[subdir]["source_crs"]
+    target_crs_code = d[subdir]["target_crs"]
+    area_of_use = d[subdir]["area_of_use"]
+    source_crs = osr.SpatialReference()
+    source_crs.SetFromUserInput(source_crs_code)
+    source_crs_name = source_crs.GetName()
+    target_crs = osr.SpatialReference()
+    target_crs.SetFromUserInput(target_crs_code)
+
+    if has_ellipsoidal_height_shift:
+        target_crs.PromoteTo3D()
+        target_crs_code = "EPSG:" + target_crs.GetAuthorityCode(None)
+
+    target_crs_name = target_crs.GetName()
+    print(f"{subdir} -> {source_crs_code}({source_crs_name}) -> {target_crs_code}({target_crs_name}). {area_of_use}")
+
+    lat_ds = gdal.Open("nadcon5/" + lat_filename)
+    lon_ds = gdal.Open("nadcon5/" + lon_filename)
+    eht_ds = gdal.Open("nadcon5/" + eht_filename) if has_ellipsoidal_height_shift else None
+    assert lat_ds.RasterXSize == lon_ds.RasterXSize
+    assert lat_ds.RasterYSize == lon_ds.RasterYSize
+    lon_gt = lon_ds.GetGeoTransform()
+    lat_gt = lat_ds.GetGeoTransform()
+    assert lon_gt == lat_gt
+
+    ellipsoidal_same_resolution = False
+    if has_ellipsoidal_height_shift:
+        if eht_ds.RasterXSize == lon_ds.RasterXSize and eht_ds.RasterYSize == lon_ds.RasterYSize:
+            ellipsoidal_same_resolution = True
+        elif eht_ds.RasterXSize == 1 + lon_ds.RasterXSize // 2 and eht_ds.RasterYSize == 1 + lon_ds.RasterYSize // 2:
+            pass
+        elif eht_ds.RasterXSize == 1 + lon_ds.RasterXSize // 3 and eht_ds.RasterYSize == 1 + lon_ds.RasterYSize // 3:
+            pass
+        elif eht_ds.RasterXSize == 1 + lon_ds.RasterXSize // 4 and eht_ds.RasterYSize == 1 + lon_ds.RasterYSize // 4:
+            pass
+        elif eht_ds.RasterXSize == 1 + lon_ds.RasterXSize // 5 and eht_ds.RasterYSize == 1 + lon_ds.RasterYSize // 5:
+            pass
+        elif lon_ds.RasterXSize == 1 + eht_ds.RasterXSize // 2 and lon_ds.RasterYSize == 1 + eht_ds.RasterYSize // 2:
+            pass
+        elif lon_ds.RasterXSize == 1 + eht_ds.RasterXSize // 3 and lon_ds.RasterYSize == 1 + eht_ds.RasterYSize // 3:
+            pass
+        elif lon_ds.RasterXSize - 1 == (eht_ds.RasterXSize - 1) * 6 // 10 and lon_ds.RasterYSize - 1 == (eht_ds.RasterYSize - 1) * 6 // 10:
+            pass
+        elif eht_ds.RasterXSize - 1 == (lon_ds.RasterXSize - 1) * 6 // 10 and eht_ds.RasterYSize - 1 == (lon_ds.RasterYSize - 1) * 6 // 10:
+            pass
+        else:
+            assert False, eht_filename
+
+        # Check spatial extent is same
+        eht_gt = eht_ds.GetGeoTransform()
+        assert lon_gt[0] + lon_gt[1] / 2 == eht_gt[0] + eht_gt[1] / 2
+        assert (lon_ds.RasterXSize - 1) * lon_gt[1] == (eht_ds.RasterXSize - 1) * eht_gt[1]
+        assert lon_gt[3] + lon_gt[5] / 2 == eht_gt[3] + eht_gt[5] / 2
+        assert (lon_ds.RasterYSize - 1) * lon_gt[5] == (eht_ds.RasterYSize - 1) * eht_gt[5]
+
+
+    mem_ds = gdal.GetDriverByName("MEM").Create("", lon_ds.RasterXSize, lon_ds.RasterYSize, 3 if ellipsoidal_same_resolution else 2, gdal.GDT_Float32)
+    mem_ds.SetGeoTransform(lon_gt)
+    mem_ds.SetSpatialRef(source_crs)
+
+    mem_ds.GetRasterBand(1).WriteRaster(0, 0, lon_ds.RasterXSize, lon_ds.RasterYSize, lat_ds.ReadRaster())
+    mem_ds.GetRasterBand(1).SetDescription("latitude_offset")
+    mem_ds.GetRasterBand(1).SetUnitType("arc-second")
+
+    mem_ds.GetRasterBand(2).WriteRaster(0, 0, lon_ds.RasterXSize, lon_ds.RasterYSize, lon_ds.ReadRaster())
+    mem_ds.GetRasterBand(2).SetDescription("longitude_offset")
+    mem_ds.GetRasterBand(2).SetMetadataItem("positive_value", "east")
+    mem_ds.GetRasterBand(2).SetUnitType("arc-second")
+
+    if ellipsoidal_same_resolution:
+        mem_ds.GetRasterBand(3).WriteRaster(0, 0, lon_ds.RasterXSize, lon_ds.RasterYSize, eht_ds.ReadRaster())
+        mem_ds.GetRasterBand(3).SetDescription("ellipsoidal_height_offset")
+        mem_ds.GetRasterBand(3).SetUnitType("metre")
+
+    mem_ds.SetMetadataItem("area_of_use", area_of_use)
+    mem_ds.SetMetadataItem("AREA_OR_POINT", "Point")
+    mem_ds.SetMetadataItem("target_crs_epsg_code", target_crs.GetAuthorityCode(None))
+    mem_ds.SetMetadataItem("TIFFTAG_COPYRIGHT", "Derived from work by NOAA. Public Domain")
+    mem_ds.SetMetadataItem("TIFFTAG_DATETIME", "2016:09:01 00:00:00")
+    description = f"{source_crs_code} ({source_crs_name}) to {target_crs_code} ({target_crs_name}). Converted from {base_url}/{subdir}"
+    mem_ds.SetMetadataItem("TIFFTAG_IMAGEDESCRIPTION", description)
+    if not has_ellipsoidal_height_shift:
+        mem_ds.SetMetadataItem("TYPE", "HORIZONTAL_OFFSET")
+    elif ellipsoidal_same_resolution:
+        mem_ds.SetMetadataItem("TYPE", "GEOGRAPHIC_3D_OFFSET")
+    else:
+        mem_ds.SetMetadataItem("TYPE", "HORIZONTAL_OFFSET")
+        mem_ds.SetMetadataItem("auxiliary_data", "ellipsoidal_height_offset")
+    mem_ds.SetMetadataItem("interpolation_method", "biquadratic")
+
+    tiff_filename = "us_noaa_nadcon5_" + subdir.replace('.', '_') + ".tif"
+    options = ["COMPRESS=DEFLATE", "PREDICTOR=3"]
+    if mem_ds.RasterXSize > 256 or mem_ds.RasterYSize > 256:
+        options += ["TILED=YES"]
+    else:
+        options += ["BLOCKYSIZE=" + str(mem_ds.RasterYSize)]
+    assert gdal.GetDriverByName("GTiff").CreateCopy(tiff_filename + ".tmp", mem_ds,
+                                                      options = options) is not None
+
+    if has_ellipsoidal_height_shift and not ellipsoidal_same_resolution:
+
+        mem_ds = gdal.GetDriverByName("MEM").Create("", eht_ds.RasterXSize, eht_ds.RasterYSize, 1, gdal.GDT_Float32)
+        mem_ds.SetGeoTransform(eht_gt)
+        mem_ds.SetSpatialRef(source_crs)
+        mem_ds.GetRasterBand(1).WriteRaster(0, 0, eht_ds.RasterXSize, eht_ds.RasterYSize, eht_ds.ReadRaster())
+        mem_ds.GetRasterBand(1).SetDescription("ellipsoidal_height_offset")
+        mem_ds.GetRasterBand(1).SetUnitType("metre")
+
+        mem_ds.SetMetadataItem("area_of_use", area_of_use)
+        mem_ds.SetMetadataItem("AREA_OR_POINT", "Point")
+        mem_ds.SetMetadataItem("target_crs_epsg_code", target_crs.GetAuthorityCode(None))
+        mem_ds.SetMetadataItem("TIFFTAG_COPYRIGHT", "Derived from work by NOAA. Public Domain")
+        mem_ds.SetMetadataItem("TIFFTAG_DATETIME", "2016:09:01 00:00:00")
+        mem_ds.SetMetadataItem("TIFFTAG_IMAGEDESCRIPTION", description)
+        mem_ds.SetMetadataItem("TYPE", "ELLIPSOIDAL_HEIGHT_OFFSET")
+        mem_ds.SetMetadataItem("auxiliary_data", "horizontal_offset")
+        mem_ds.SetMetadataItem("interpolation_method", "biquadratic")
+
+        options = ["COMPRESS=DEFLATE", "PREDICTOR=3"]
+        if mem_ds.RasterXSize > 256 or mem_ds.RasterYSize > 256:
+            options += ["TILED=YES"]
+        else:
+            options += ["BLOCKYSIZE=" + str(mem_ds.RasterYSize)]
+        assert gdal.GetDriverByName("GTiff").CreateCopy(tiff_filename + ".tmp", mem_ds,
+                                                      options = options + ["APPEND_SUBDATASET=YES"]) is not None
+
+    generate_optimized_file(tiff_filename + ".tmp", tiff_filename)
+    gdal.Unlink(tiff_filename + ".tmp")
+
+    out_ds = gdal.Open(tiff_filename)
+    assert out_ds.GetRasterBand(1).ReadRaster() == lat_ds.ReadRaster()
+    assert out_ds.GetRasterBand(2).ReadRaster() == lon_ds.ReadRaster()
+    if ellipsoidal_same_resolution:
+        assert out_ds.GetRasterBand(3).ReadRaster() == eht_ds.ReadRaster()
+    if has_ellipsoidal_height_shift and not ellipsoidal_same_resolution:
+        out_ds = gdal.Open("GTIFF_DIR:2:" + tiff_filename)
+        assert out_ds.GetRasterBand(1).ReadRaster() == eht_ds.ReadRaster()
+
+    readme_txt += f"### {area_of_use}: NADCON5: {source_crs_name} -> {target_crs_name}\n"
+    readme_txt += "\n"
+    readme_txt += "*Source*: [NADCON5 .b files coming from NOAA](%s)  \n" % (base_url + "/" + subdir)
+    readme_txt += "*Format*: GeoTIFF converted with build_nadcon5.py script  \n"
+    readme_txt += "*License*: Public Domain  \n"
+    readme_txt += f"*Source CRS*: {source_crs_name} ({source_crs_code})  \n"
+    readme_txt += f"*Target CRS*: {target_crs_name} ({target_crs_code})\n"
+    readme_txt += "\n"
+    if has_ellipsoidal_height_shift:
+        readme_txt += "Includes ellipsoidal height offsets.\n\n"
+    readme_txt += "* %s\n" % tiff_filename
+    readme_txt += "\n"
+
+open('README_nadcon5.txt', 'wt').write(readme_txt)
diff --git a/us_noaa/us_noaa_README.txt b/us_noaa/us_noaa_README.txt
index 5b70615..a8f7391 100644
--- a/us_noaa/us_noaa_README.txt
+++ b/us_noaa/us_noaa_README.txt
@@ -44,6 +44,304 @@ Also include a few files which are duplicate of *hpgn.tif files, for historic re
 * us_noaa_WI.tif - Wisconsin
 * us_noaa_WO.tif - Washington, Oregon, N. California
 
+### USA - American Samoa: NADCON5: American Samoa 1962 -> NAD83(HARN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/as62.nad83_1993.as)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: American Samoa 1962 (EPSG:4169)  
+*Target CRS*: NAD83(HARN) (EPSG:4152)
+
+* us_noaa_nadcon5_as62_nad83_1993_as.tif
+
+### USA - Guam and the Commonwealth of the Northern Mariana Islands: NADCON5: Guam 1963 -> NAD83(HARN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/gu63.nad83_1993.guamcnmi)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: Guam 1963 (EPSG:4675)  
+*Target CRS*: NAD83(HARN) (EPSG:4152)
+
+* us_noaa_nadcon5_gu63_nad83_1993_guamcnmi.tif
+
+### USA - Alaska: NADCON5: NAD27 -> NAD83
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad27.nad83_1986.alaska)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD27 (EPSG:4267)  
+*Target CRS*: NAD83 (EPSG:4269)
+
+* us_noaa_nadcon5_nad27_nad83_1986_alaska.tif
+
+### USA - Conterminous: NADCON5: NAD27 -> NAD83
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad27.nad83_1986.conus)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD27 (EPSG:4267)  
+*Target CRS*: NAD83 (EPSG:4269)
+
+* us_noaa_nadcon5_nad27_nad83_1986_conus.tif
+
+### USA - Alaska: NADCON5: NAD83 -> NAD83(HARN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1986.nad83_1992.alaska)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83 (EPSG:4269)  
+*Target CRS*: NAD83(HARN) (EPSG:4152)
+
+* us_noaa_nadcon5_nad83_1986_nad83_1992_alaska.tif
+
+### USA - Hawaii: NADCON5: NAD83 -> NAD83(HARN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1986.nad83_1993.hawaii)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83 (EPSG:4269)  
+*Target CRS*: NAD83(HARN) (EPSG:4152)
+
+* us_noaa_nadcon5_nad83_1986_nad83_1993_hawaii.tif
+
+### USA - Puerto Rico and the Virgin Islands: NADCON5: NAD83 -> NAD83(HARN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1986.nad83_1993.prvi)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83 (EPSG:4269)  
+*Target CRS*: NAD83(HARN) (EPSG:4152)
+
+* us_noaa_nadcon5_nad83_1986_nad83_1993_prvi.tif
+
+### USA - Conterminous: NADCON5: NAD83 -> NAD83(HARN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1986.nad83_harn.conus)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83 (EPSG:4269)  
+*Target CRS*: NAD83(HARN) (EPSG:4152)
+
+* us_noaa_nadcon5_nad83_1986_nad83_harn_conus.tif
+
+### USA - Alaska: NADCON5: NAD83(HARN) -> NAD83(NSRS2007)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1992.nad83_2007.alaska)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(HARN) (EPSG:4152)  
+*Target CRS*: NAD83(NSRS2007) (EPSG:4893)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_1992_nad83_2007_alaska.tif
+
+### USA - Puerto Rico and the Virgin Islands: NADCON5: NAD83(HARN) -> NAD83(HARN Corrected)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1993.nad83_1997.prvi)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(HARN) (EPSG:4152)  
+*Target CRS*: NAD83(HARN Corrected) (EPSG:8544)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_1993_nad83_1997_prvi.tif
+
+### USA - American Samoa: NADCON5: NAD83(HARN) -> NAD83(FBN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1993.nad83_2002.as)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(HARN) (EPSG:4152)  
+*Target CRS*: NAD83(FBN) (EPSG:8542)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_1993_nad83_2002_as.tif
+
+### USA - Guam and the Commonwealth of the Northern Mariana Islands: NADCON5: NAD83(HARN) -> NAD83(FBN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1993.nad83_2002.guamcnmi)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(HARN) (EPSG:4152)  
+*Target CRS*: NAD83(FBN) (EPSG:8542)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_1993_nad83_2002_guamcnmi.tif
+
+### USA - Hawaii: NADCON5: NAD83(HARN) -> NAD83(PA11)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1993.nad83_pa11.hawaii)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(HARN) (EPSG:4152)  
+*Target CRS*: NAD83(PA11) (EPSG:6321)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_1993_nad83_pa11_hawaii.tif
+
+### USA - Puerto Rico and the Virgin Islands: NADCON5: NAD83(HARN Corrected) -> NAD83(FBN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_1997.nad83_2002.prvi)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(HARN Corrected) (EPSG:8545)  
+*Target CRS*: NAD83(FBN) (EPSG:8542)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_1997_nad83_2002_prvi.tif
+
+### USA - Puerto Rico and the Virgin Islands: NADCON5: NAD83(FBN) -> NAD83(NSRS2007)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_2002.nad83_2007.prvi)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(FBN) (EPSG:8860)  
+*Target CRS*: NAD83(NSRS2007) (EPSG:4893)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_2002_nad83_2007_prvi.tif
+
+### USA - Guam and the Commonwealth of the Northern Mariana Islands: NADCON5: NAD83(FBN) -> NAD83(MA11)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_2002.nad83_ma11.guamcnmi)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(FBN) (EPSG:8860)  
+*Target CRS*: NAD83(MA11) (EPSG:6324)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_2002_nad83_ma11_guamcnmi.tif
+
+### USA - American Samoaa: NADCON5: NAD83(FBN) -> NAD83(PA11)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_2002.nad83_pa11.as)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(FBN) (EPSG:8860)  
+*Target CRS*: NAD83(PA11) (EPSG:6321)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_2002_nad83_pa11_as.tif
+
+### USA - Alaska: NADCON5: NAD83(NSRS2007) -> NAD83(2011)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_2007.nad83_2011.alaska)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(NSRS2007) (EPSG:4759)  
+*Target CRS*: NAD83(2011) (EPSG:6319)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_2007_nad83_2011_alaska.tif
+
+### USA - Conterminous: NADCON5: NAD83(NSRS2007) -> NAD83(2011)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_2007.nad83_2011.conus)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(NSRS2007) (EPSG:4759)  
+*Target CRS*: NAD83(2011) (EPSG:6319)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_2007_nad83_2011_conus.tif
+
+### USA - Puerto Rico and the Virgin Islands: NADCON5: NAD83(NSRS2007) -> NAD83(2011)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_2007.nad83_2011.prvi)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(NSRS2007) (EPSG:4759)  
+*Target CRS*: NAD83(2011) (EPSG:6319)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_2007_nad83_2011_prvi.tif
+
+### USA - Conterminous: NADCON5: NAD83(FBN) -> NAD83(NSRS2007)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_fbn.nad83_2007.conus)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(FBN) (EPSG:8860)  
+*Target CRS*: NAD83(NSRS2007) (EPSG:4893)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_fbn_nad83_2007_conus.tif
+
+### USA - Conterminous: NADCON5: NAD83(HARN) -> NAD83(FBN)
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/nad83_harn.nad83_fbn.conus)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: NAD83(HARN) (EPSG:4152)  
+*Target CRS*: NAD83(FBN) (EPSG:8542)
+
+Includes ellipsoidal height offsets.
+
+* us_noaa_nadcon5_nad83_harn_nad83_fbn_conus.tif
+
+### USA - Hawaii: NADCON5: Old Hawaiian -> NAD83
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/ohd.nad83_1986.hawaii)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: Old Hawaiian (EPSG:4135)  
+*Target CRS*: NAD83 (EPSG:4269)
+
+* us_noaa_nadcon5_ohd_nad83_1986_hawaii.tif
+
+### USA - Puerto Rico and the Virgin Islands: NADCON5: Puerto Rico -> NAD83
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/pr40.nad83_1986.prvi)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: Puerto Rico (EPSG:4139)  
+*Target CRS*: NAD83 (EPSG:4269)
+
+* us_noaa_nadcon5_pr40_nad83_1986_prvi.tif
+
+### USA - Saint George Island: NADCON5: St. George Island -> NAD83
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/sg1952.nad83_1986.stgeorge)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: St. George Island (EPSG:4138)  
+*Target CRS*: NAD83 (EPSG:4269)
+
+* us_noaa_nadcon5_sg1952_nad83_1986_stgeorge.tif
+
+### USA - Saint Lawrence Island: NADCON5: St. Lawrence Island -> NAD83
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/sl1952.nad83_1986.stlawrence)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: St. Lawrence Island (EPSG:4136)  
+*Target CRS*: NAD83 (EPSG:4269)
+
+* us_noaa_nadcon5_sl1952_nad83_1986_stlawrence.tif
+
+### USA - Saint Lawrence Island: NADCON5: St. Paul Island -> NAD83
+
+*Source*: [NADCON5 .b files coming from NOAA](https://geodesy.noaa.gov/pub/nadcon5/20160901release/Builds/sp1952.nad83_1986.stpaul)  
+*Format*: GeoTIFF converted with build_nadcon5.py script  
+*License*: Public Domain  
+*Source CRS*: St. Paul Island (EPSG:4137)  
+*Target CRS*: NAD83 (EPSG:4269)
+
+* us_noaa_nadcon5_sp1952_nad83_1986_stpaul.tif
+
 ### Continental USA VERTCON: NGVD (19)29 height to NAVD (19)88 height
 
 *Source*: converted from [NOAA VERTCON .94 grids](https://www.ngs.noaa.gov/PC_PROD/VERTCON/)  
diff --git a/us_noaa/us_noaa_nadcon5_as62_nad83_1993_as.tif b/us_noaa/us_noaa_nadcon5_as62_nad83_1993_as.tif
new file mode 100644
index 0000000..d980463
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diff --git a/us_noaa/us_noaa_nadcon5_gu63_nad83_1993_guamcnmi.tif b/us_noaa/us_noaa_nadcon5_gu63_nad83_1993_guamcnmi.tif
new file mode 100644
index 0000000..d468ab2
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diff --git a/us_noaa/us_noaa_nadcon5_nad27_nad83_1986_alaska.tif b/us_noaa/us_noaa_nadcon5_nad27_nad83_1986_alaska.tif
new file mode 100644
index 0000000..6f79e3e
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diff --git a/us_noaa/us_noaa_nadcon5_nad27_nad83_1986_conus.tif b/us_noaa/us_noaa_nadcon5_nad27_nad83_1986_conus.tif
new file mode 100644
index 0000000..745ce4e
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1986_nad83_1992_alaska.tif b/us_noaa/us_noaa_nadcon5_nad83_1986_nad83_1992_alaska.tif
new file mode 100644
index 0000000..78c9b2c
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1986_nad83_1993_hawaii.tif b/us_noaa/us_noaa_nadcon5_nad83_1986_nad83_1993_hawaii.tif
new file mode 100644
index 0000000..55692b5
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1986_nad83_1993_prvi.tif b/us_noaa/us_noaa_nadcon5_nad83_1986_nad83_1993_prvi.tif
new file mode 100644
index 0000000..bae6a26
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1986_nad83_harn_conus.tif b/us_noaa/us_noaa_nadcon5_nad83_1986_nad83_harn_conus.tif
new file mode 100644
index 0000000..1b36469
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1992_nad83_2007_alaska.tif b/us_noaa/us_noaa_nadcon5_nad83_1992_nad83_2007_alaska.tif
new file mode 100644
index 0000000..e6a3b32
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1993_nad83_1997_prvi.tif b/us_noaa/us_noaa_nadcon5_nad83_1993_nad83_1997_prvi.tif
new file mode 100644
index 0000000..3c35bba
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1993_nad83_2002_as.tif b/us_noaa/us_noaa_nadcon5_nad83_1993_nad83_2002_as.tif
new file mode 100644
index 0000000..8d43d23
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1993_nad83_2002_guamcnmi.tif b/us_noaa/us_noaa_nadcon5_nad83_1993_nad83_2002_guamcnmi.tif
new file mode 100644
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1993_nad83_pa11_hawaii.tif b/us_noaa/us_noaa_nadcon5_nad83_1993_nad83_pa11_hawaii.tif
new file mode 100644
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_1997_nad83_2002_prvi.tif b/us_noaa/us_noaa_nadcon5_nad83_1997_nad83_2002_prvi.tif
new file mode 100644
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_2002_nad83_2007_prvi.tif b/us_noaa/us_noaa_nadcon5_nad83_2002_nad83_2007_prvi.tif
new file mode 100644
index 0000000..b4d58ea
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_2002_nad83_ma11_guamcnmi.tif b/us_noaa/us_noaa_nadcon5_nad83_2002_nad83_ma11_guamcnmi.tif
new file mode 100644
index 0000000..bc1e63a
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_2002_nad83_pa11_as.tif b/us_noaa/us_noaa_nadcon5_nad83_2002_nad83_pa11_as.tif
new file mode 100644
index 0000000..0994e3e
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_2007_nad83_2011_alaska.tif b/us_noaa/us_noaa_nadcon5_nad83_2007_nad83_2011_alaska.tif
new file mode 100644
index 0000000..cb0a158
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_2007_nad83_2011_conus.tif b/us_noaa/us_noaa_nadcon5_nad83_2007_nad83_2011_conus.tif
new file mode 100644
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_2007_nad83_2011_prvi.tif b/us_noaa/us_noaa_nadcon5_nad83_2007_nad83_2011_prvi.tif
new file mode 100644
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_fbn_nad83_2007_conus.tif b/us_noaa/us_noaa_nadcon5_nad83_fbn_nad83_2007_conus.tif
new file mode 100644
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diff --git a/us_noaa/us_noaa_nadcon5_nad83_harn_nad83_fbn_conus.tif b/us_noaa/us_noaa_nadcon5_nad83_harn_nad83_fbn_conus.tif
new file mode 100644
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diff --git a/us_noaa/us_noaa_nadcon5_ohd_nad83_1986_hawaii.tif b/us_noaa/us_noaa_nadcon5_ohd_nad83_1986_hawaii.tif
new file mode 100644
index 0000000..b306d84
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diff --git a/us_noaa/us_noaa_nadcon5_pr40_nad83_1986_prvi.tif b/us_noaa/us_noaa_nadcon5_pr40_nad83_1986_prvi.tif
new file mode 100644
index 0000000..b951d91
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diff --git a/us_noaa/us_noaa_nadcon5_sg1952_nad83_1986_stgeorge.tif b/us_noaa/us_noaa_nadcon5_sg1952_nad83_1986_stgeorge.tif
new file mode 100644
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diff --git a/us_noaa/us_noaa_nadcon5_sl1952_nad83_1986_stlawrence.tif b/us_noaa/us_noaa_nadcon5_sl1952_nad83_1986_stlawrence.tif
new file mode 100644
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diff --git a/us_noaa/us_noaa_nadcon5_sp1952_nad83_1986_stpaul.tif b/us_noaa/us_noaa_nadcon5_sp1952_nad83_1986_stpaul.tif
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