I have used ArcGIS for years in an academic context but have very recently started using QGIS in earnest as my ArcGIS license is expired and I want to experience a new set of soul rending frustrations. I have a large catalog of DEM rasters from the US National Elevation Dataset (in ArcGRID and/or Gridfloat format) that have been mosaicked with ArcGIS. I do not know how to give more data on them, as I cannot access them in ArcCatalog and they do not show up in QGIS' Browser (at least as files I'm used to seeing or whose structure I can understand).

When I "Add Raster Data" in QGIS and open the file browse (Windows) dialog (with the "..." button), navigate to my geodatabase, I am given the option to choose from a number of file types, none of which seem to be the actual raster/mosaic I'm looking for (like I would see in ArcCatalog). When I click the file type dropdown, I can narrow down the selection, but none of the individual files in the geodatabase folder are of any of those types. I have ATX (.atx) FREELIST (.freelist) GDBINDEXES (.gdbindex) GDBTABLE (.gdbtable) GDBTABLX (.gdbtablx) LOCK (.sr.lock) SPX (.spx) SUBFILE (.subfile) SUBFILX (.subfilx), but none of these seem to be the actual data I am looking for. Adding any of these filetypes throws an INVALID LAYER error (Invalid Layer: GDAL provider Cannot open GDAL dataset G:[filepath] not recognized as a supported file format. Raster layer Provider is not valid.......)

How do I load a raster of this type into QGIS?

THIS LINK seems to address the same question, but I don't seem to have any .adf files either (at least not with my mosaicked datasets.

I am using QGIS 3.6.2-Noosa on Windows 10

  • 1
    Only ArcGIS can access file geodatabase rasters. – Vince May 24 '19 at 19:52
  • Are you certain? From the link I referenced above, it seems to me that may not be accurate??? But perhaps I misunderstand the comment "ESRI grids are definitely supported by GDAL" – c_vanderlip May 25 '19 at 0:30
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    Arc/Info Grid format is completely different from geodatabase raster. Neither the Esri FileGDB driver nor the open one supports raster. – Vince May 25 '19 at 0:51

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