Trying to create 1 mosaic dataset from 2 million files. Would it be better to break the files into regions and then create regional mosaic datasets and then make a mosaic dataset of the mosaic datasets (does that make any sense?)? Or just slug it out and do one dataset of 2 million files? BTW the datatype is CIB
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My personal experience in mosaicking even just a few hundred tiles together is that it is much faster to do it iteratively by ganging them up in sub-regions first. Indeed I found with the arcinfo workstation mosaic command that some mosaic operations wouldn't complete at all without sub-grouping first. In the case if millions I'd expect to repeat many times (though row and column pixel dimensions may be a more significant factor than number of files). I'd also investigate using gdal's VRT format to delay the actual computation as far into the process as possible: How can I merge geotiffs with a vrt file?. There's also the related Converting CIB data to Google Tiles with GDAL |
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I would look into LizardTech software their software runs in a x64 bit enviornment and should be able to handle the workload. Either way make sure you have a lot of time for processing. |
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