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Author Topic: Missing GEOID12B_AK GEOID file for Alaska/United States  (Read 1802 times)

andyroo

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Missing GEOID12B_AK GEOID file for Alaska/United States
« on: December 02, 2022, 04:24:17 AM »
I tried to create a compound coordinate system to export data in NAVD88 vertical datum and got the error

"Selected vertical datum is unavailable. Please configure datum transformation."

And that's when I realized that on the geoids page Metashape is missing the GEOID12B_AK file from NGS.

Now that I look into it a little more and I see that you're using GTG format, can I just install it myself from the PROJ-data repo here?

andyroo

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Re: Missing GEOID12B_AK GEOID file for Alaska/United States
« Reply #1 on: December 09, 2022, 03:52:51 AM »
Tried to install from the above location - we get this error:

libtiff error: Not a TIFF or MDI file, bad magic number 2570 (0xa0a)
TIFFClientOpen: unexpected error: <snip>/apps/metashape/1.8.4-pro/geoids/us_noaa_g2012ba0.tif

Alexey Pasumansky

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Re: Missing GEOID12B_AK GEOID file for Alaska/United States
« Reply #2 on: December 09, 2022, 03:16:30 PM »
Hello Andy,

In combination with what planar/projected coordinate systems you would like to use this geoid?
Best regards,
Alexey Pasumansky,
Agisoft LLC

andyroo

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Re: Missing GEOID12B_AK GEOID file for Alaska/United States
« Reply #3 on: December 12, 2022, 10:39:29 AM »
Hi Alexey, zones EPSG 3338 and EPSG 6330 to EPSG 6339.