#ARCMAP RASTER CALCULATOR HOW TO#
Presumably this means that it can even be done in ArcGIS, and I think I’ve figured out how to build cellular automata in ModelBuilder (once I know with certainty how to make iteration work there). Someone said earlier that, with raster data, this can, in theory, be done with any GIS that can do raster algebra. I understand that Markov chains are a way of doing this, and IDRISI has some sort of module for Markov chains, but I have no access to IDRISI. I need to build a probabilistic cellular automaton for simulating land-use changes and am wondering how to implement this in a GIS.
I am not sure how I should formulate my expression such that it takes into account all rasters in the folder QgsMapLayerRegistry.instance().addMapLayer(rlayer)Įxpression = '(' + entries.ref + ' + ' + entries.ref + ')'Ĭalc = QgsRasterCalculator(expression,'/home/usr/Desktop/final.tif', How can I add all my rasters in my directory inputFolder and create one output raster? I have the following code so far: inputFolder = "/home/usr/Desktop/"įor root, dirs, files in os.walk(path, filter):įor file in fnmatch.filter(files, filter):įor l in findRasters(inputFolder, '*.tif'): When I use the raster calculator, it manages to do what I want, but now I need to use it outside QGIS and do it automatically for all rasters in the folder.
The problem is the rasters have different number of rows and columns and different resolution (reading them in as numpy arrays and adding them does not work). I have a directory with binary raster files (1 band only) which I need to add in a standalone python script.
0 kommentar(er)
