Place 'renders' object in Item properties

stac-extensions · Apr 16, 2024 · da0e40f · da0e40f
1 parent 9b57094
commit da0e40f
Show file tree

Hide file tree

Showing 4 changed files with 106 additions and 94 deletions.
diff --git a/README.md b/README.md
@@ -120,13 +120,15 @@ by simply specifying the `url` and `assets` query parameters.
 From the [Sentinel-2 item](https://github.com/stac-extensions/virtual-assets/blob/main/examples/item-sentinel2.json):
 
 ```json
-"renders":{
-  "sir":
-  {
-    "title": "Shortwave Infra-red",
-    "assets": [ "swir22", "nir2",  "red" ],
-    "rescale": [[0,5000],[0,7000],[0,9000]],
-    "resampling": "nearest"
+"properties":{
+  "renders":{
+    "sir":
+    {
+      "title": "Shortwave Infra-red",
+      "assets": [ "swir22", "nir2",  "red" ],
+      "rescale": [[0,5000],[0,7000],[0,9000]],
+      "resampling": "nearest"
+    }
   }
 }
 ```
@@ -167,15 +169,18 @@ the NDVI asset could also be downloaded as a standalone asset.
     },
   }
 },
-"renders":{
-  "ndvi":
-  {
-    "title": "Normalized Difference Vegetation Index",
-    "assets": [ "ndvi" ],
-    "resampling": "average",
-    "colormap_name": "ylgn"
+"properties":{
+  "renders":{
+    "ndvi":
+    {
+      "title": "Normalized Difference Vegetation Index",
+      "assets": [ "ndvi" ],
+      "resampling": "average",
+      "colormap_name": "ylgn"
+    }
   }
 }
+
 ```
 
 If this case, the parameters to titiler must be extracted from both the virtual asset definition and the render object.
@@ -199,15 +204,17 @@ Result:  Landsat Surface Reflectance Normalized Difference Vegetation Index (NDV
 Obviously, the same rendering can be applied to local source assets without using the virtual asset.
 
 ```json
-"renders":{
-  "ndvi":
-  {
-    "title": "Normalized Difference Vegetation Index",
-    "assets": [ "B05", "B04" ],
-    "resampling": "average",
-    "colormap_name": "ylgn",
-    "expression": "(B05–B04)/(B05+B04)",
-    "rescale": [[-1,1]]
+"properties":{
+  "renders":{
+    "ndvi":
+    {
+      "title": "Normalized Difference Vegetation Index",
+      "assets": [ "B05", "B04" ],
+      "resampling": "average",
+      "colormap_name": "ylgn",
+      "expression": "(B05–B04)/(B05+B04)",
+      "rescale": [[-1,1]]
+    }
   }
 }
 ```

diff --git a/examples/item-landsat8.json b/examples/item-landsat8.json
@@ -30,7 +30,43 @@
     "landsat:wrs_row": "33",
     "datetime": "2021-03-05T18:45:37.619485Z",
     "created": "2021-03-16T01:40:56.703Z",
-    "updated": "2021-03-16T01:40:56.703Z"
+    "updated": "2021-03-16T01:40:56.703Z",
+    "renders": {
+      "thumbnail": {
+        "title": "Thumbnail",
+        "assets": [
+          "B4",
+          "B3",
+          "B2"
+        ],
+        "rescale": [
+          [
+            0,
+            150
+          ]
+        ],
+        "colormap_name": "rainbow",
+        "resampling": "bilinear",
+        "bidx": [
+          1
+        ],
+        "width": 1024,
+        "height": 1024,
+        "bands": [
+          "B4",
+          "B3",
+          "B2"
+        ]
+      },
+      "ndvi": {
+        "title": "Normalized Difference Vegetation Index",
+        "assets": [
+          "ndvi"
+        ],
+        "resampling": "average",
+        "colormap_name": "ylgn"
+      }
+    }
   },
   "geometry": {
     "type": "Polygon",
@@ -269,42 +305,6 @@
       }
     }
   },
-  "renders": {
-    "thumbnail": {
-      "title": "Thumbnail",
-      "assets": [
-        "B4",
-        "B3",
-        "B2"
-      ],
-      "rescale": [
-        [
-          0,
-          150
-        ]
-      ],
-      "colormap_name": "rainbow",
-      "resampling": "bilinear",
-      "bidx": [
-        1
-      ],
-      "width": 1024,
-      "height": 1024,
-      "bands": [
-        "B4",
-        "B3",
-        "B2"
-      ]
-    },
-    "ndvi": {
-      "title": "Normalized Difference Vegetation Index",
-      "assets": [
-        "ndvi"
-      ],
-      "resampling": "average",
-      "colormap_name": "ylgn"
-    }
-  },
   "bbox": [
     -123.00234,
     37.82405,

diff --git a/examples/item-sentinel2.json b/examples/item-sentinel2.json
@@ -60,7 +60,32 @@
     "sentinel:product_id": "S2B_MSIL2A_20210221T095029_N0214_R079_T33SVB_20210221T115149",
     "sentinel:data_coverage": 100,
     "eo:cloud_cover": 21.22,
-    "sentinel:valid_cloud_cover": true
+    "sentinel:valid_cloud_cover": true,
+    "renders": {
+      "sir": {
+        "title": "Shortwave Infra-red",
+        "assets": [
+          "swir22",
+          "nir2",
+          "red"
+        ],
+        "rescale": [
+          [
+            0,
+            5000
+          ],
+          [
+            0,
+            7000
+          ],
+          [
+            0,
+            9000
+          ]
+        ],
+        "resampling": "nearest"
+      }
+    }
   },
   "collection": "sentinel-s2-l2a-cogs",
   "assets": {
@@ -617,31 +642,6 @@
       ]
     }
   },
-  "renders": {
-    "sir": {
-      "title": "Shortwave Infra-red",
-      "assets": [
-        "swir22",
-        "nir2",
-        "red"
-      ],
-      "rescale": [
-        [
-          0,
-          5000
-        ],
-        [
-          0,
-          7000
-        ],
-        [
-          0,
-          9000
-        ]
-      ],
-      "resampling": "nearest"
-    }
-  },
   "links": [
     {
       "rel": "collection",

diff --git a/json-schema/schema.json b/json-schema/schema.json
@@ -5,7 +5,7 @@
   "description": "STAC Rendering Extension for STAC Items and STAC Collections.",
   "oneOf": [
     {
-      "$comment": "This is the schema for STAC Items. Remove this object if this extension only applies to Collections.",
+      "$comment": "This is the schema for STAC Items.",
       "allOf": [
         {
           "$ref": "#/definitions/stac_extensions"
@@ -14,18 +14,23 @@
           "type": "object",
           "required": [
             "type",
-            "assets",
-            "renders"
+            "properties",
+            "assets"
           ],
           "properties": {
             "type": {
               "const": "Feature"
             },
-            "renders": {
-              "$comment": "This validates the fields in Item Assets, but does not require them.",
+            "properties": {
               "type": "object",
-              "additionalProperties": {
-                "$ref": "#/definitions/fields"
+              "required": ["renders"],
+              "properties": {
+                "renders": {
+                  "type": "object",
+                  "additionalProperties": {
+                    "$ref": "#/definitions/fields"
+                  }
+                }
               }
             }
           }
@@ -161,7 +166,7 @@
             "type": "number"
           }
         },
-        "bidx":{
+        "bidx": {
           "type": "array",
           "items": {
             "type": "number"