COG
The Studio Platform load Cloud-Optimized GeoTIFFs (COG) by specifying URLs to standardized Spatio-Temporal Asset Catalog (STAC) metadata.
STAC metadata requirements
Studio provides tiling and metadata services but can work against external tiling services provided that they conform to standard STAC and tiling conventions.
- The metadata file must be a valid STAC Item, version 1.0.0 or higher. STAC Collections and Catalogs are not currently supported.
- Raster data referenced in STAC assets should be Cloud-Optimized GeoTIFFs and need to be publicly accessible via HTTPS.
- STAC item must have Electro-Optical and Raster extensions, and at least one asset must have both
eo:bandsandraster:bandsinformation.common_namemust be provided ineo:bandsanddata_typemust be provided inraster:bands. For categorical bandsstatistics.minimumandstatistics.maximummust be set inraster:bands.
Raster data_type support table:
| Data type | Description | Supported |
|---|---|---|
| int8 | 8-bit integer | Yes |
| int16 | 16-bit integer | Yes |
| int32 | 32-bit integer | Yes |
| int64 | 64-bit integer | No |
| uint8 | unsigned 8-bit integer (common for 8-bit RGB PNG's) | Yes |
| uint16 | unsigned 16-bit integer | Yes |
| uint32 | unsigned 32-bit integer | Yes |
| uint64 | unsigned 64-bit integer | No |
| float16 | 16-bit float | No |
| float32 | 32-bit float | No |
| float64 | 64-big float | No |
| cint16 | 16-bit complex integer | No |
| cint32 | 32-bit complex integer | No |
| cfloat32 | 32-bit complex float | No |
| cfloat64 | 64-bit complex float | No |
| other | Other data type than the ones listed above (e.g. boolean, string, higher precision numbers) | No |
Categorical data
The Studio Platform supports categorical band channels where every pixel is underlying to some category (eg. snow, agriculture, water, clouds etc.). Every pixel of an image has a numeric value related to some category. For appropriate re-scaling colormaps, statistics.minimum and statistics.maximum must be set in raster:bands extension ( Raster extension statistics).
Updated 5 months ago