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Place 'renders' object in Item properties
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4 files changed

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‎README.md‎

Lines changed: 30 additions & 23 deletions
Original file line numberDiff line numberDiff line change
@@ -120,13 +120,15 @@ by simply specifying the `url` and `assets` query parameters.
120120
From the [Sentinel-2 item](https://github.com/stac-extensions/virtual-assets/blob/main/examples/item-sentinel2.json):
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```json
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"renders":{
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"sir":
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{
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"title": "Shortwave Infra-red",
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"assets": [ "swir22", "nir2", "red" ],
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"rescale": [[0,5000],[0,7000],[0,9000]],
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"resampling": "nearest"
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"properties":{
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"renders":{
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"sir":
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{
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"title": "Shortwave Infra-red",
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"assets": [ "swir22", "nir2", "red" ],
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"rescale": [[0,5000],[0,7000],[0,9000]],
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"resampling": "nearest"
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}
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}
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}
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```
@@ -167,15 +169,18 @@ the NDVI asset could also be downloaded as a standalone asset.
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},
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}
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},
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"renders":{
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"ndvi":
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{
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"title": "Normalized Difference Vegetation Index",
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"assets": [ "ndvi" ],
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"resampling": "average",
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"colormap_name": "ylgn"
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"properties":{
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"renders":{
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"ndvi":
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{
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"title": "Normalized Difference Vegetation Index",
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"assets": [ "ndvi" ],
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"resampling": "average",
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"colormap_name": "ylgn"
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}
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}
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}
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```
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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
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Obviously, the same rendering can be applied to local source assets without using the virtual asset.
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```json
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"renders":{
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"ndvi":
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{
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"title": "Normalized Difference Vegetation Index",
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"assets": [ "B05", "B04" ],
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"resampling": "average",
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"colormap_name": "ylgn",
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"expression": "(B05–B04)/(B05+B04)",
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"rescale": [[-1,1]]
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"properties":{
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"renders":{
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"ndvi":
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{
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"title": "Normalized Difference Vegetation Index",
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"assets": [ "B05", "B04" ],
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"resampling": "average",
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"colormap_name": "ylgn",
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"expression": "(B05–B04)/(B05+B04)",
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"rescale": [[-1,1]]
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}
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}
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}
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```

‎examples/item-landsat8.json‎

Lines changed: 37 additions & 37 deletions
Original file line numberDiff line numberDiff line change
@@ -30,7 +30,43 @@
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"landsat:wrs_row": "33",
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"datetime": "2021-03-05T18:45:37.619485Z",
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"created": "2021-03-16T01:40:56.703Z",
33-
"updated": "2021-03-16T01:40:56.703Z"
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"updated": "2021-03-16T01:40:56.703Z",
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"renders": {
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"thumbnail": {
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"title": "Thumbnail",
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"assets": [
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"B4",
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"B3",
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"B2"
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],
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"rescale": [
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[
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0,
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150
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]
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],
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"colormap_name": "rainbow",
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"resampling": "bilinear",
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"bidx": [
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1
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],
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"width": 1024,
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"height": 1024,
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"bands": [
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"B4",
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"B3",
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"B2"
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]
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},
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"ndvi": {
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"title": "Normalized Difference Vegetation Index",
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"assets": [
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"ndvi"
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],
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"resampling": "average",
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"colormap_name": "ylgn"
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}
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}
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},
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"geometry": {
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"type": "Polygon",
@@ -269,42 +305,6 @@
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}
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}
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},
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"renders": {
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"thumbnail": {
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"title": "Thumbnail",
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"assets": [
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"B4",
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"B3",
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"B2"
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],
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"rescale": [
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[
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0,
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150
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]
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],
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"colormap_name": "rainbow",
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"resampling": "bilinear",
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"bidx": [
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1
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],
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"width": 1024,
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"height": 1024,
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"bands": [
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"B4",
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"B3",
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"B2"
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]
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},
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"ndvi": {
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"title": "Normalized Difference Vegetation Index",
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"assets": [
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"ndvi"
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],
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"resampling": "average",
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"colormap_name": "ylgn"
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}
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},
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"bbox": [
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-123.00234,
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37.82405,

‎examples/item-sentinel2.json‎

Lines changed: 26 additions & 26 deletions
Original file line numberDiff line numberDiff line change
@@ -60,7 +60,32 @@
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"sentinel:product_id": "S2B_MSIL2A_20210221T095029_N0214_R079_T33SVB_20210221T115149",
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"sentinel:data_coverage": 100,
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"eo:cloud_cover": 21.22,
63-
"sentinel:valid_cloud_cover": true
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"sentinel:valid_cloud_cover": true,
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"renders": {
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"sir": {
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"title": "Shortwave Infra-red",
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"assets": [
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"swir22",
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"nir2",
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"red"
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],
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"rescale": [
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[
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0,
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5000
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],
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[
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0,
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7000
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],
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[
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0,
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9000
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]
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],
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"resampling": "nearest"
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}
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}
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},
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"collection": "sentinel-s2-l2a-cogs",
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"assets": {
@@ -617,31 +642,6 @@
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]
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}
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},
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"renders": {
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"sir": {
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"title": "Shortwave Infra-red",
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"assets": [
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"swir22",
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"nir2",
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"red"
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],
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"rescale": [
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[
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0,
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5000
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],
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[
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0,
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7000
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],
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[
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0,
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9000
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]
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],
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"resampling": "nearest"
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}
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},
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"links": [
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{
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"rel": "collection",

‎json-schema/schema.json‎

Lines changed: 13 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -5,7 +5,7 @@
55
"description": "STAC Rendering Extension for STAC Items and STAC Collections.",
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"oneOf": [
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{
8-
"$comment": "This is the schema for STAC Items. Remove this object if this extension only applies to Collections.",
8+
"$comment": "This is the schema for STAC Items.",
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"allOf": [
1010
{
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"$ref": "#/definitions/stac_extensions"
@@ -14,18 +14,23 @@
1414
"type": "object",
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"required": [
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"type",
17-
"assets",
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"renders"
17+
"properties",
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"assets"
1919
],
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"properties": {
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"type": {
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"const": "Feature"
2323
},
24-
"renders": {
25-
"$comment": "This validates the fields in Item Assets, but does not require them.",
24+
"properties": {
2625
"type": "object",
27-
"additionalProperties": {
28-
"$ref": "#/definitions/fields"
26+
"required": ["renders"],
27+
"properties": {
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"renders": {
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"type": "object",
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"additionalProperties": {
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"$ref": "#/definitions/fields"
32+
}
33+
}
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}
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}
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}
@@ -161,7 +166,7 @@
161166
"type": "number"
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}
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},
164-
"bidx":{
169+
"bidx": {
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"type": "array",
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"items": {
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"type": "number"

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