Re: [gdal-dev] false easting and northing units

2024-01-25 Thread Greg Troxel via gdal-dev
Kirk Waters - NOAA Federal via gdal-dev writes: > Thanks for the explanation and tips. I'm not clear on how setting to 26988 > (Michigan North meters) would help. If I do a gdal_translate with that, it > shows as being in New Zealand, just as Arc had done. It would certainly > make lots more sens

Re: [gdal-dev] false easting and northing units

2024-01-25 Thread Even Rouault via gdal-dev
Le 25/01/2024 à 17:08, Kirk Waters - NOAA Federal a écrit : Even, Thanks for the explanation and tips. I'm not clear on how setting to 26988 (Michigan North meters) would help. Hopefully forcing 1.0 will fix the issue. ah, I didn't realize that the "NAD83 / Michigan North" in your WKT was *n

Re: [gdal-dev] false easting and northing units

2024-01-25 Thread Kirk Waters - NOAA Federal via gdal-dev
Even, Thanks for the explanation and tips. I'm not clear on how setting to 26988 (Michigan North meters) would help. If I do a gdal_translate with that, it shows as being in New Zealand, just as Arc had done. It would certainly make lots more sense to actually put the data in a standard projection

Re: [gdal-dev] false easting and northing units

2024-01-25 Thread Even Rouault via gdal-dev
Kirk, perhaps you could try using -a_srs EPSG:26988+6360 instead of a full WKT. That way GDAL will *not* write the projected parameter definitions, but just reference the horizontal and vertical CRS codes: Geotiff_Information:    Version: 1    Key_Revision: 1.1    Tagged_Information:   Mo

Re: [gdal-dev] false easting and northing units

2024-01-25 Thread Even Rouault via gdal-dev
Kirk, this is a complicated story indeed... What changed since https://trac.osgeo.org/gdal/changeset/31405 is that OGC GeoTIFF 1.1 was published, which mostly fixes issues with vertical CRS, which your CRS uses. So by default GDAL 3.1 or later, when seeing a CompoundCRS write it as GeoTIFF 1.

[gdal-dev] false easting and northing units

2024-01-25 Thread Kirk Waters - NOAA Federal via gdal-dev
Hi, I've run across an odd issue with GeoTIFFS using custom projections written by GDAL and their interpretation in ArcPro. The specific case is doing a projection for Michigan State Plane North using U.S. survey feet. [insert embarrassing tale of another US agency wanting to always use survey feet