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Question asked by mlata_nifc on May 8, 2020
Latest reply on May 9, 2020 by

I’m having two issues and our GIS folks can’t explain it, having little experience with rasters than vectors, and none with ‘Combine’. I am working with .asc and/or .tif output files from FlamMap. In the past, I've used Combine a LOT to help assess outputs. It's been about two years since I did this and, in the meantime, ArcMap and FlamMap have both received upgrades. Here's what I'm getting (I've now spent close to 6 hours trying to figure it out):


  • When I try to combine, for example, crownfire/fuel model/canopy cover/ etc. – or even just two of those (.asc or .tiff), I get an attribute table, but it isn’t giving me fields (columns) for the value/s of the input rasters. All I get are OBJECTID, Value, and Count.
  • If I try to save the combine output file to MY location on our corporate drive (US Forest Service), it won’t work at all, and I get three errors which, true to a lot of ESRI error ‘explanations’, are not very helpful, and I’ve now spent about 5 hours trying to figure it out. This is the same file in which the rasters in question are living in.
  • I tried posting this question with the files attached, and it didn't send, so I'm trying again without.