OSGeo / gdal / 12006498756

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HEIF and AVIF: add read-only GeoHEIF support (#11333)

Adds read-only support for the draft OGC 24-038 "GeoHEIF" geo-referencing method for HEIF related drivers. This is being developed for OGC Testbed 20.

See http://t20-gimi-ogc-006ced09ca2d3b1481b.pages.ogc.org/documents/D010/document.html for a WIP draft.

libheif and libavif have slightly different ways to get properties, but the base parsing code is shared.

This will work with libheif from 1.19.0. For libavif, it'll require master branch. There is a slightly modified CI build to check that.

Co-authored-by: Even Rouault <even.rouault@spatialys.com>
Co-authored-by: Kai Pastor <dg0yt@darc.de>

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