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|---|---|---|
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| { | ||
| "$schema": "http://json-schema.org/draft-07/schema#", | ||
| "$id": "https://stac-extensions.github.io/sar/v1.1.0/schema.json", | ||
| "title": "SAR Extension", | ||
| "description": "STAC SAR Extension to a STAC Item", | ||
| "type": "object", | ||
| "required": [ | ||
| "stac_extensions" | ||
| ], | ||
| "properties": { | ||
| "stac_extensions": { | ||
| "type": "array", | ||
| "contains": { | ||
| "const": "https://stac-extensions.github.io/sar/v1.1.0/schema.json" | ||
| } | ||
| } | ||
| }, | ||
| "oneOf": [ | ||
| { | ||
| "$comment": "This is the schema for STAC Items.", | ||
| "type": "object", | ||
| "required": [ | ||
| "type", | ||
| "properties", | ||
| "assets" | ||
| ], | ||
| "properties": { | ||
| "type": { | ||
| "const": "Feature" | ||
| }, | ||
| "properties": { | ||
| "allOf": [ | ||
| { | ||
| "required": [ | ||
| "sar:instrument_mode", | ||
| "sar:frequency_band", | ||
| "sar:polarizations" | ||
| ], | ||
| "properties": { | ||
| "sar:polarizations": { | ||
| "type": "array", | ||
| "maxItems": 4, | ||
| "uniqueItems": true | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| "$ref": "#/definitions/fields" | ||
| } | ||
| ] | ||
| }, | ||
| "assets": { | ||
| "type": "object", | ||
| "additionalProperties": { | ||
| "$ref": "#/definitions/fields" | ||
| } | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| "$comment": "This is the schema for STAC Collections.", | ||
| "type": "object", | ||
| "required": [ | ||
| "type" | ||
| ], | ||
| "properties": { | ||
| "type": { | ||
| "const": "Collection" | ||
| }, | ||
| "assets": { | ||
| "type": "object", | ||
| "additionalProperties": { | ||
| "$ref": "#/definitions/fields" | ||
| } | ||
| }, | ||
| "item_assets": { | ||
| "type": "object", | ||
| "additionalProperties": { | ||
| "$ref": "#/definitions/fields" | ||
| } | ||
| } | ||
| } | ||
| } | ||
| ], | ||
| "definitions": { | ||
| "fields": { | ||
| "$comment": "Add your new fields here. Don't require them here, do that above in the item schema.", | ||
| "type": "object", | ||
| "properties": { | ||
| "sar:instrument_mode": { | ||
| "title": "Instrument Mode", | ||
| "type": "string", | ||
| "examples": [ | ||
| "WV" | ||
| ], | ||
| "minLength": 1 | ||
| }, | ||
| "sar:frequency_band": { | ||
| "title": "Frequency Band", | ||
| "type": "string", | ||
| "enum": [ | ||
| "P", | ||
| "L", | ||
| "S", | ||
| "C", | ||
| "X", | ||
| "Ku", | ||
| "K", | ||
| "Ka" | ||
| ] | ||
| }, | ||
| "sar:center_frequency": { | ||
| "title": "Center Frequency (GHz)", | ||
| "type": "number" | ||
| }, | ||
| "sar:polarizations": { | ||
| "title": "Polarizations", | ||
| "type": "array", | ||
| "minItems": 1, | ||
| "items": { | ||
| "$ref": "#/definitions/polarizations" | ||
| } | ||
| }, | ||
| "sar:product_type": { | ||
| "title": "Product type", | ||
| "type": "string", | ||
| "minLength": 1, | ||
| "examples": [ | ||
| "SSC", | ||
| "MGD", | ||
| "SGC" | ||
| ] | ||
| }, | ||
| "sar:resolution_range": { | ||
| "title": "Resolution range (m)", | ||
| "type": "number", | ||
| "minimum": 0 | ||
| }, | ||
| "sar:resolution_azimuth": { | ||
| "title": "Resolution azimuth (m)", | ||
| "type": "number", | ||
| "minimum": 0 | ||
| }, | ||
| "sar:pixel_spacing_range": { | ||
| "title": "Pixel spacing range (m)", | ||
| "type": "number", | ||
| "minimum": 0 | ||
| }, | ||
| "sar:pixel_spacing_azimuth": { | ||
| "title": "Pixel spacing azimuth (m)", | ||
| "type": "number", | ||
| "minimum": 0 | ||
| }, | ||
| "sar:looks_range": { | ||
| "title": "Looks range", | ||
| "type": "integer", | ||
| "minimum": 0 | ||
| }, | ||
| "sar:looks_azimuth": { | ||
| "title": "Looks azimuth", | ||
| "type": "integer", | ||
| "minimum": 0 | ||
| }, | ||
| "sar:looks_equivalent_number": { | ||
| "title": "Equivalent number of looks (ENL)", | ||
| "type": "number", | ||
| "minimum": 0 | ||
| }, | ||
| "sar:observation_direction": { | ||
| "title": "Antenna pointing direction", | ||
| "type": "string", | ||
| "enum": [ | ||
| "left", | ||
| "right" | ||
| ] | ||
| }, | ||
| "sar:beam_ids": { | ||
| "title": "Beam identifiers", | ||
| "type": "array", | ||
| "items": { | ||
| "type": "string" | ||
| } | ||
| } | ||
| }, | ||
| "patternProperties": { | ||
| "^(?!sar:)": { | ||
| "$comment": "Do not allow unspecified fields prefixed with sar:" | ||
| } | ||
| }, | ||
| "additionalProperties": false | ||
| }, | ||
| "polarizations": { | ||
| "type": "string", | ||
| "enum": [ | ||
| "HH", | ||
| "VV", | ||
| "HV", | ||
| "VH" | ||
| ] | ||
| } | ||
| } | ||
| } |