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How to combine two overlapping rasters in ArcGIS?
Using ArcGIS 10.2, I am trying to combine two rasters which are identically overlapping in shape and extent, but with different values and counts. As an end result I would like each cell to retain values from both rasters, so I can compare the two values within each cell. Does anyone have an idea of how to accomplish this?
How does the combine tool work in ArcGIS Pro?
The Combine tool takes multiple input rasters and assigns a new value for each unique combination of input values in the output raster. The original cell values from each of the inputs is recorded in the attribute table of the output raster. Additional items are added to the output raster’s attribute table—one for each input raster.
Are there any problems merging two raster datasets?
The main problem with merging these are that they are different resolutions (one is 10m and one is ~20m). Also, another problem with merging the two is that they overlap and I am not sure of the most effective way of dealing with that overlap. Obviously I want to keep the values of the better resolution.
How are input and output rasters related in ArcGIS Pro?
The names of the input rasters are respectively assigned to the field names. Each of these fields carries the unique input combination of values from the input rasters that produces the output value. These items retain the parentage that was used to produce the values for the output raster.
How are cell values recorded in a raster?
The original cell values from each of the inputs is recorded in the attribute table of the output raster. Additional items are added to the output raster’s attribute table—one for each input raster. The names of the input rasters are respectively assigned to the field names.
Which is the default setting for overlapping rasters?
The default is LAST, which states the output cell value of the overlapping areas will be the value from the last raster dataset mosaicked into that location. Settings are FIRST, LAST, BLEND, MEAN, MINIMUM, and MAXIMUM.
Is there a way to compare two rasters?
If you want to make comparison between your two raster, you can use the raster calculator or any other spatial analyst tool (small list here ), and there is no advantage to stack the bands together. For visualization, my little trick for integer images is to make the sum of one raster and a product of the second raster.
How to combine lidar and photogrammetric rasters?
I need to combine these together, essentially inserting the 2km LiDAR raster into the other and removing that portion of the photogrammetric data, the idea being that the LiDAR is much more detailed in the area closest to the centre and the site that I’m working on.