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I´m studying a jungle area in Peru, and when I try to calculate the slope with the "Slope, Aspect, Curvature" tool from SAGA v7.7.0, I get that the whole terrain has a 90-degree slope. In the contrary, when I use the ArcGIS slope tool, I get normal values. My DEM is in meters, same units for the x, y, and z axis. Currently trying with the 9 parameter 2nd order polynom (Zevenbergen & Thorne 1987) method in SAGA.

How can I do this?

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  • Could you post your Grid System information? – Kazuhito Sep 7 '20 at 2:50

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