How to combine these three rasters according to this logic?
please, see the attached images that show my question
explanation:
I've three rasters: slope, landuse and hydraulic conductivity. i need to combine them according the relation shown in the table (second attachment)
i convert the table shown in the second attachment to the following code:
----------------------------------------------------------- if [Type] = "FieldCrop-Shrub" then if [FlowType] = "TYPE D" then Select Case [Slope] Case 1 oo = .6 Case 2 oo =.4 Case 3 oo =.2 Case Else oo =0 End Select else if [FlowType] = "TYPE E" then Select Case [Slope] Case 1 oo = .8 Case 2 oo =.6 Case 3 oo =.4 Case Else oo =0 End Select
end if end if else if [Type] = "Forest" then if [FlowType] = "TYPE D" then Select Case [Slope] Case 1 oo = .8 Case 2 oo =.6 Case 3 oo =.4 Case Else oo =0 End Select else if [FlowType] = "TYPE E" then Select Case [Slope] Case 1 oo = 1 Case 2 oo =.6 Case 3 oo =.4 Case Else oo =0 End Select
I know this is an old thread, but it popped up to the top, so here's a quick answer. The equivalent of if/then/else logic for rasters is the Con tool/statement.
As an alternative one could use the Combine—Help | ArcGIS for Desktop tool to combine the rasters (have to be integer) and perform the analysis in the attribute table (create a new field with the result) and use the Lookup—Help | ArcGIS for Desktop tool to create the output raster based on the generated field.
