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I am working on project to create a DSM raster for whole Kentucky. I will have over 46000 tiff tiles and each one is about 10 Mb and one band. Normally, I use Mosaic to New Raster Tool but this time data is very large. I am planning to divide the project into smaller pieces but I have no idea what size should I set the each piece. I will use python code with ArcGis Desktop 10.6 to complete project. Considering my computer has 2.7 Ghz (i7) processor with 16 Gb RAM, How many tiles I need to use at one time? like 1000? 10000? or what number?

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    Create a mosaic dataset, should be able to deal with that number of rasters.
    – Hornbydd
    Jul 12 '18 at 22:33
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    Don't use a raster catalog, it is inferior to a Mosaic Dataset as @Hornbydd suggests resources.arcgis.com/en/help/main/10.2/index.html#//… . On the surface they appear similar; a Mosaic Dataset is like an unmanaged image catalog. With 46k tiles of 10MB, which is considerably large but not the largest I've dealt with, you should be able to create a dataset in less than a day and it will be usable just like a single raster. If you do need to combine to a single raster you can use raster to other format, be prepared for that to take 2-3 days depending on your HDD speed. Jul 12 '18 at 22:55
  • Thank you @Micheal Stimson and Hornbydd . I will create mosaic dataset and keep it that way.
    – Amadeus
    Jul 12 '18 at 23:26
  • Could you please edit your post to include a single, focused question?
    – Aaron
    Jul 13 '18 at 0:00

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