Allow authorities other than EPSG in GeoTIFF #121
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…pochGeoKey` key name from the "GeoTIFF v1.0 key name" column to the "This document key name". In my understanding, that key didn't existed in GeoTIFF 1.0.
… and requirement 16.5. This is a source code formatting, with no change in text and no change in the PDF or HTML formatting. This is a complement of pull request opengeospatial#114, which was done by an automatic tool on main paragraphs only. The formatting in this commit was done manually in preparation for future change requests with content changes.
* Authorities other than EPSG. * Full WKT definitions.
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GeoTIFF currently allows a CRS to be specified either by an authority code, or by user-supplied definition. When an authority code is used, then it shall be an EPSG code. The GeoTIFF specification does not allow other authorities. However we will probably need to support IAU codes in the future such as the ones listed in OGC registry. So some way to use other authorities is desired.
Proposal
"standard CRSs are identified through reference to an EPSG CRS code." It can be replaced by
"standard CRSs are identified through a CRS code from EPSG registry or other authority."
TextDefGeoKeyshall be an identifier as a character string in the formAUTHORITY:CODE. For example"IAU:1085". If the integer value is 2, thenTextDefGeoKeyis a WKT string.