Merge pull request #175 from TDG-Platform/feature-add-type-to-asset

add type to asset

json-spec/json-schema/stac-item.json

@@ -137,14 +137,18 @@
     "asset": {
       "type": "object",
       "required": [
-        "href"
+        "href",
+        "mime_type"
       ],
       "properties": {
         "href": {
           "type": "string"
         },
         "name": {
           "type": "string"
+        },
+        "mime_type": {
+          "type": "string"
         }
       }
     },

json-spec/json-spec.md

@@ -76,9 +76,12 @@ as any 'sidecar' files that are related and help a client make sense of the data
 JSON, etc), unusable data masks, satellite ephemeris data, etc. Some assets (like Landsat data) are represented by multiple files - 
 all should be linked to. It is generally recommended that different processing levels or formats are not exhaustively listed in an
 `Item`, but instead are represented by related `Items` that are linked to, but the best practices around this are still emerging.
-An asset object currently just requires a href field, which can be a relative or absolute link, to provide a link to the
-asset for download or streaming access. The 'name' field is optional, and is generally the display name for clients & users.
-The asset definition will likely evolve soon to be able to explain itself more.
+
+***Assets required fields***
+asset for download or streaming access. The 'name' field is optional, and is generally the display name for clients & users.	
+* href - link to the asset object.  The link can be a relative or absolute link The asset definition will likely evolve soon to be able to explain itself more.	
+* mime_type - the mime type of the object.  Prefered that standard mime types be used when possible.  Type can include; image/geotiff, image/geotiff+cog, or type with a vendor prefix, example: vnd.digitalglobe/til
+****We would like to register image/geotiff as a mime type with IANA****
 
 **thumbnail** is a special *strongly recommended* `asset` that is a downsampled image of the core asset, for direct display online in a web page or
 interactive search application. Even assets that are less easily translated in to a visual image should provide some visual representation, 

static-catalog/README.md

@@ -79,8 +79,6 @@ _"Root" Catalog_
         "url": "https://www.fsa.usda.gov/programs-and-services/aerial-photography/imagery-programs/naip-imagery/"
     },
 
-    "formats": ["geotiff", "cog"],
-
     "keywords": ["aerial"],
     "homepage": "http://wherever",
 

static-catalog/json-schema/catalog.json

@@ -107,13 +107,6 @@
         "contact": {
           "$ref": "#/definitions/entity"
         },
-        "formats": {
-          "description": "Included asset formats",
-          "type": "array",
-          "items": {
-            "type": "string"
-          }
-        },
         "keywords": {
           "description": "Keywords",
           "type": "array",