v0.9.0-rc1

[v0.9.0-rc1] - 2020-01-06

Added

• ItemCollection requires stac_version field, stac_extensions has also been added
• A description field has been added to Item assets (also Asset definitions extension).
• Field mission to Common Metadata fields.
• Extensions:
  • Version Indicators extension, adds version and deprecated fields to STAC Items and Collections
  • Data Cube extension can be used in Collections, added new field description
  • Added description and roles fields to the Asset in the Asset Extension
  • Projection Extension to describe Items with Assets that have an associated geospatial projection.
• STAC API:
  • Added the Item and Collection API Version extension to support versioning in the API specification
  • Run npm run serve or npm run serve-ext to quickly render development versions of the OpenAPI spec in the browser.

Changed

• Support for CommonMark 0.29 instead of CommonMark 0.28
• Collection field property and the merge ability moved to a new extension 'Commons'
• Added attribute roles to Item assets (also Asset definitions extension), to be used similarly to Link rel.
• Updated API yaml to clarify bbox filter should be implemented without brackets. Example: bbox=160.6,-55.95,-170,-25.89
• Collection summaries merge array fields now.
• Several fields have been moved from extensions or item fields to the Common Metadata fields:
  • eo:platform / sar:platform => platform
  • eo:instrument / sar:instrument => instruments, also changed from string to array of strings
  • eo:constellation / sar:constellation => constellation
  • dtr:start_datetime => start_datetime
  • dtr:end_datetime => end_datetime
• Extensions:
  • Data Cube extension: Changed allowed formats (removed PROJ string, added PROJJSON / WKT2) for reference systems
  • Checksum extension is now using self-identifiable hashes (Multihash)
  • Changed sar:type to sar:product_type and sar:polarization to sar:polarizations in the SAR extension
• STAC API:
  • The endpoint /stac has been merged with /
  • The endpoint /stac/search is now called /search
  • Sort Extension - added non-JSON query/form parameter format
  • Fields extension has a simplified format for GET parameters
  • search extension renamed to context extension. JSON object renamed from search:metadata to context
  • Removed "next" from the search metadata and query parameter, added POST body and headers to the links for paging support
  • Query Extension - type restrictions on query predicates are more accurate, which may require additional implementation support.

Removed

• version field in STAC Collections. Use Version Extension instead
• summaries field from Catalogs. Use Collections instead
• Asset Types (pre-defined values for the keys of individual assets, not media types) in Items. Use the asset's roles instead.
• license field doesn't allow SPDX expressions any longer. Use various and links instead.
• Extensions:
  • eo:platform, eo:instrument, eo:constellation from EO extension, and sar:platform, sar:instrument, sar:constellation from the SAR extension
  • Removed from EO extension field eo:epsg in favor of proj:epsg
  • gsd and accuracy from eo:bands in the EO extension
  • sar:absolute_orbit and sar:center_wavelength fields from the SAR extension
  • data_type and unit from the sar:bands object in the SAR extension
  • Datetime Range (dtr) extension. Use the Common Metadata fields instead.
• STAC API:
  • next from the search metadata and query parameter, added POST body and headers to the links for paging support

Fixed

• The license field in Item and Collection spec explicitly mentions that the value proprietary without a link means that the data is private.
• Clarified how to fill stac_extensions.
• More clarifications; typos fixed