Submitting GeoTIFF Files Georeferenced in a Local Coordinate System

Generally, GeoTIFF files containing RGB/RGBA or elevation data contain a header describing the coordinate system in which the file content data is georeferenced. For many files in a local or arbitrarily defined coordinate system, however, the GeoTIFF header does not contain the complete coordinate system definition—and may only contain a string such as "LOCAL CS." Therefore, we require a supplementary definition to process these files correctly.

If a site has been set up with a local site calibration, local GeoTIFF files can be uploaded for processing through the Create new dataset flow for non-PPK users or the workflow for PPK users flying DJI, Wingtra, or Quantum drones and choosing the Preprocessed data option.

Click the UPLOAD button and select Surveys.

Select DEM Surface and/or Orthophoto (GeoTIFF).

Select the site to which you want to add the GeoTIFF files, then drag and drop or search for files on your computer to upload.

If the file is in the local calibration, in the Choose files to upload screen, turn on This file is in the site's local system for each file it applies.

How to know that your file is in a local system

• If you know that your file is in a system that includes a shift in X, Y, and/or Z from the underlying projection.
• If you use software that requires defining a coordinate system (such as a DC/CAL/JXL file in Trimble products or a GC3 file in Topcon products).
• More technically,  if a WKT string or PRJ file cannot define the file system.

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