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@cholmes cholmes released this 26 Feb 18:14
· 1114 commits to master since this release
v0.9.0
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v0.9.0 - 2020-02-26

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:
  • 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
  • Basics added to Common Metadata definitions with new description field for
    Item properties
  • New fields to the link object to facilitate pagination support for POST requests
  • data role, as a suggestion for a common role for data files to be used in case data providers don't come up with their own names and semantics
  • Clarification text on HTTP verbs in STAC API

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
  • Moved angle definitions from extensions eo and new view extension
    • eo:off_nadir -> view:off_nadir
    • eo:azimuth -> view:azimuth
    • eo:incidence_angle -> view:incidence_angle
    • eo:sun_azimuth -> view:sun_azimuth
    • eo:sun_elevation -> view:sun_elevation
  • 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
  • Item title definition moved from core Item fields to Common Metadata Basics
    fields. No change is required for STAC Items.
  • putFeature can return a PreconditionFailed to provide more explicit information when the resource has changed in the server
  • Sort extension now uses "+" and "-" prefixes for GET requests to denote sort order.
  • Clarified how /search links must be added to / and changed that links to both GET and POST must be provided now that the method can be specified in links

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
  • In API, removed any mention of using media type multipart/form-data and x-www-form-urlencoded

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
  • Fixed Item JSON Schema now allOf optional Common Metadata properties are evaluated
  • Clarified usage of optional Common Metadata fields for STAC Items
  • Clarified usage of paging options, especially in relation to what OGC API - Features offers
  • Allow Commonmark in asset description, as it's allowed everywhere else
  • Put asset description in the API
  • Fixed API spec regarding license expressions
  • Added missing schema in the API Version extension
  • Fixed links in the Landsat example in the collection-spec
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