How can we mosaic multiple raster images from separate folders?

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06-01-2017 04:39 AM
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New Contributor

I have 380 DEMs. All the rasters are in .tif format. I am trying to mosaic them together. But the issue is that every raster image is in a separate folder. There are 380 folders for the 380 different rasters. I have tried creating a file geodatabase, adding a raster catalog and then adding the DEMs to the catalog. But it did not work.

I have also tried creating an empty mosaic dataset and adding rasters to it.

The issue basically is that every raster is in a separate folder and mosaicking them individually is not a feasible option.

Kindly suggest a solution!

dem mosaic‌ raster mosaic dataset

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MVP Regular Contributor

arcgis desktop - How to use ModelBuilder to add many images to mosaic dataset? - Geographic Informat... 

Creating a mosaic dataset—Help | ArcGIS for Desktop 

  • The Include Sub Folders check box should be checked. This option will recursively explore any subfolders containing the data being added.
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New Contributor

Thank you for your reply.

But we had already checked the sub-folder option while adding rasters to the mosaic dataset. Just for your convenience the folder structure that we have right now is:

  1. Main Folder 1
    • Sub-folder 1
      • Raster
    • Sub-folder 2
      • Raster
    • .....
  2. Main Folder 2
    • Sub-folder 1
      • Raster
    • Sub-folder 2
      • Raster
    • ......

Like this we have four main folders and approximately 50-60 sub-folders within each main folder and every sub-folder has one raster each. So how do we iterate between these folders?

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MVP Esteemed Contributor

Have you tried Adding raster data to a mosaic dataset—Help | ArcGIS for Desktop    with the "Workspace" option?

I tried it three different ways (with 3-main, 2ith 2 subfolders unders each, with on raster.

  1. adding all the sub-folder x (i,.e 6 folders),
  2. adding all the Main folders (i.e. 3)
  3. adding a top folder with the structure you have.

All three of these had the same result, so I think if all your "Main Folder X" folders are in a separate "top folder" you should be able to run this command once.  I've done a similar process with about 56k raster,

Copy of the python snippet.......most are the default options....I only entered the info in the above window.

arcpy.AddRastersToMosaicDataset_management(in_mosaic_dataset="C:/__temp/_test.gdb/test3", raster_type="Raster Dataset", input_path="C:\__teemp", update_cellsize_ranges="UPDATE_CELL_SIZES", update_boundary="UPDATE_BOUNDARY", update_overviews="NO_OVERVIEWS", maximum_pyramid_levels="", maximum_cell_size="0", minimum_dimension="1500", spatial_reference="", filter="#", sub_folder="SUBFOLDERS", duplicate_items_action="ALLOW_DUPLICATES", build_pyramids="NO_PYRAMIDS", calculate_statistics="NO_STATISTICS", build_thumbnails="NO_THUMBNAILS", operation_description="#", force_spatial_reference="NO_FORCE_SPATIAL_REFERENCE")