The problem happens after having the DEM, then I do the process of determining the slope and I get a new map in which the data do not correspond, it does not calculate it, then in percentage, because when I do it with grades, it only takes me two Ranges, one low and one high. For example I do not give the percentages, but very high values (0-7101609412, 7101609412-2485563294, etc.)

I have done it in ArcGis and QGIS, all the same happens, I have also used different types of DEM and nothing.

Thank you very much for the help you can give me.

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