Hi, I've got more than 2000 DEM files and each DEM file has at least one adjacent DEM file, and they have a overlap area. I'd like to compare cell values of these overlap areas and locate those areas which don't match.
I've already made this happen in ARCGIS model builder, but the process is very slow, I hope to improve the efficiency in FME by using parallel processing.
Here's how I did in ARCGIS model builder:
1.Create a raseter mosaic dataset in the GDB, then import all the DEM files into it and use it to minus every single DEM file by using iterator.
2.Change output raster' 0 value into nodata from step 1 by using extract attribute tool which parameter is set as "VALUE >0 OR VALUE <0".
3.Use IsNull tool to change nodata value into 1 and other value into 0.
4.Convert rasters into polygons and export thoes values equal 0, then I got not match part.
Can anybody tell how to do this in FME, which transformers are equal to the tool in ARCGIS? Thank you very much.