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enter image description hereI have a DEM in UTM (meters) / NAVD88 (meters) and need to transform it to State Plane (feet) / NAVD88 (feet). Unfortunately, I do not have the raster calculator in ArcGIS, so I have to use "Project Raster" and apply a vertical transformation. My xy coordinates are correct and the scale of my vertical coordinates is correct. Since they are both on the same datum (NAVD88) and only differ in scale, you'd think that the vertical transformation would be easy (just multiply the vertical values by ~3.28) and would work correctly. However, vertical coordinates shift upwards by ~ 5' from where they should every time I apply this transformation. Any idea why this happens?

Side note: I have resolved this problem in QGIS, but would like to try to figure out why I am having trouble in ArcGIS as I would prefer to perform all of my GIS operations in ArcGIS. The attached image shows the default transformation which is applied (unnecessarily/erroneously) during the operation.

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    What did you do in QGIS that was successful? – Stu Smith Jan 16 at 16:02
  • Converted the projection, raster calculator to convert vertical coordinates (just multiplied by 3.28084), and then used the Whitebox Tools convertrasterformat tool to convert it to the format I need. I’m trying to figure I why it won’t work in ArcGIS though – Lauren Alivia Morgan Jan 17 at 18:30
  • Is the projected coordinate system used in QGIS the same as the one in Arc? I know between the two there can be some small differences. Another thing I would try would be to look at your environment settings for the raster desktop.arcgis.com/en/arcmap/10.3/manage-data/raster-and-images/… – GISKid Jan 17 at 19:58

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