I am using ArcMap 10.2.2, and I need to aggregate categorical data from 30m up to 90m and 900m resolution for species distribution modeling. The algorithms available in resample (nearest neighbor, bilear, etc.) are not appropriate for my purposes, and the Aggregate tool does not have a "majority" option. Thus, I think I have to use the Block Statistics tool. However, I am getting a strange, recurrent error where some cells in the output raster show up as noData. Has anyone else seen this problem? I got the same effects when working with both fgdb rasters and geotiffs. The same apparently random cells show up as noData over multiple runs. The input data does not have any noData cells in the areas where I'm seeing the problem.
As a work around, I can do this in R using the aggregate function in the raster package. Their algorithm is inexplicably slow, though, and it's more convenient for me to work in Arc if possible. Here are the messages from the results panel, just in case they're helpful.
Output (noData in red):
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As a work around, I can do this in R using the aggregate function in the raster package. Their algorithm is inexplicably slow, though, and it's more convenient for me to work in Arc if possible. Here are the messages from the results panel, just in case they're helpful.
Messages
Executing: BlockStatistics NLCD_2011_WV_WGS_1984.tif C:\Users\mosteele\Desktop\aggregation_test\NLCD_2011_WV_90m_ArcMap_version2.tif "Rectangle 3 3 CELL" MAJORITY DATA
Start Time: Thu Jun 25 11:45:37 2015
Succeeded at Thu Jun 25 11:45:40 2015 (Elapsed Time: 2.46 seconds)
Input:
Executing: BlockStatistics NLCD_2011_WV_WGS_1984.tif C:\Users\mosteele\Desktop\aggregation_test\NLCD_2011_WV_90m_ArcMap_version2.tif "Rectangle 3 3 CELL" MAJORITY DATA
Start Time: Thu Jun 25 11:45:37 2015
Succeeded at Thu Jun 25 11:45:40 2015 (Elapsed Time: 2.46 seconds)
Output (noData in red):
أكثر...