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support for compound-CRS? #181

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hugoledoux opened this issue Oct 19, 2023 · 1 comment · May be fixed by #193
Open

support for compound-CRS? #181

hugoledoux opened this issue Oct 19, 2023 · 1 comment · May be fixed by #193

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@hugoledoux
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I think we should explore how we support compound-CRSs, which is done by proj/gdalwarp by using 2 EPSG: EPSG:28992+5709 (this is equivalent to using EPSG:7415 but there are cases, like copdem where EPSG:4326+3855 is used and there is no one EPSG for this).

The OGC Name Specs now accepts CURIEs, and it is explained there how we could support this:

this would mean modifying the "metadata"/"referenceSystem" to accept an array of strings, I guess.
This was referenced Apr 9, 2024
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@Ylannl
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Ylannl commented Dec 16, 2024

I think this is an important feature. Indeed some countries do not seem have a single EPSG code for their national CRS + vertical axis. So currently not possibly to properly represent this in CityJSON.

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@hugoledoux @Ylannl