Fixes #10

Adding details of the real-world test data.

README.md

@@ -142,17 +142,45 @@ hand close-up). The figure also shows the buffer regions created around the
 two higher resolution datasets (bottom left). The red line is the boundary of the
 mesh used (see figure below).
 
-
 ![Input data](https://github.com/EnvModellingGroup/hdrs/blob/master/docs/original_bathy_data_sml.png)
 
 After running the code above, we produce this blended dataset. The mesh is shown in the 
 lower left, with a close-up on the right. Mesh varied in resolution from 
-2000m to 50m. Note the three bathymetric highs (yellow) near the Gebco label above
+2000m to 50m. Note the three bathymetric highs (yellow) near the GEBCO label above
 are smoothed in the buffer region and there is no longer the obvious line
-between the Gebco data and the EMod data.
+between the GEBCO data and the EMod data.
 
 ![Blended bathymetry data on the multiscale mesh](https://github.com/EnvModellingGroup/hdrs/blob/master/docs/blended_rasters_with_mesh_sml.png)
 
+Data availability: Due to licensing, these data cannot be distributied with HRDS. GEBCO can be downloaded here. EMod can be obtained here. Both are available free of charge. The highest resolution data is available from [OceanWise] (https://www.oceanwise.eu/) but charges apply (your institution may have access via Digimap). 
+
+The extents of these data are given below in both UTM Zone 30N and Lat/lon.
+
+GEBCO:
+```
+Upper Left  (  766859.683, 5978004.171) (  1d 3'38.34"E, 53d52'54.13"N)
+Lower Left  (  766859.683, 5744003.495) (  0d52' 9.27"E, 51d46'59.32"N)
+Upper Right ( 1097334.321, 5978004.171) (  6d 2'21.77"E, 53d36'29.76"N)
+Lower Right ( 1097334.321, 5744003.495) (  5d37' 6.72"E, 51d31'46.24"N)
+```
+EMod:
+```
+Upper Left  (  837967.380, 5856534.579) (  2d 0'32.89"E, 52d45' 9.73"N)
+Lower Left  (  837967.380, 5757658.491) (  1d54'35.70"E, 51d52' 1.52"N)
+Upper Right (  921603.168, 5856534.579) (  3d14'29.46"E, 52d41'38.60"N)
+Lower Right (  921603.168, 5757658.491) (  3d 7' 5.60"E, 51d48'36.98"N)
+Center      (  879785.274, 5807096.535) (  2d34'10.17"E, 52d16'57.50"N)
+```
+OceanWise:
+```
+Upper Left  (  858372.882, 5814203.705) (  2d15'52.30"E, 52d21'38.28"N)
+Lower Left  (  858372.882, 5772942.941) (  2d13'15.51"E, 51d59'28.40"N)
+Upper Right (  873215.438, 5814203.705) (  2d28'53.42"E, 52d21' 2.66"N)
+Lower Right (  873215.438, 5772942.941) (  2d26'10.25"E, 51d58'53.25"N)
+```
+
+Place these rasters inside the test/real_data directory as per the filenames in ``test_hrds.py`` and the extended tests will also be run. These are not run by the continuous integration.
+
 Community
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