Web ODM raster download EPSG conversions

General Help
#1

When you request a customer EPSG Raster Download, Does WebODM make the necessary datum conversions say between variations of WGS to NAVD88?

Thanks in advance.

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#2

Do you have a particular example of what CRS you are concerned about?

#3

Yes, UTM 15N (32615) to Texas North Central State Plane (6584) When the conversion is done properly ( geodesic transform ), the whole image should move ENE about 1.5 Meters. Thanks in advance. If you use GDALWARP, you need to employ the 7 factor Helmert transform. Thanks in advance.

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#4

Are you able to provide us data to test and confirm with?

Have you confirmed an issue with this transform?

#5

This image set happens to be a park in El Paso TX, but it shows the same problem. The image file shows the EPSG. They lay on top of each other in QGIS. The error is 1.4 m ESE from an RTK measured Check Point. Forgive my earlier comment, the position correction should be WNW between the NAVD88 and WGS datum position. I have verfied this error at numerous locations across the US and it is consistent.
ODM conversion examples.

Thanks in advance for your help.

Konrad

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#6

Saijin. Were you able to replicate my concern

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#7

No, not at present.

Are you able to open this as an issue on our GitHub tracker with any examples and supporting information you have?

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#8

I’ll be happy to do this. I think I know the answer and it involves to an explicit transform using the -ct command in gdalwarp.

Konrad

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