Hi there, I´m trying to cut a raster with a polygon mask in qgis 2.18 The validation tool produces a draw with the message "valid output", but the topology tool finds a "non valid geometry" in the id objetc 0. The shape has only one object, an irregular polygon representing a watershed. SO the error shows the entire watershed. Anyone can help me finding the real error and how can i repair it? Thanks. Boris
------------------------------------------------------------------------------------------------------ Boris G. DIAZ - Mg.Sci.Ing. Forestal Área Recursos Hídricos - INTA EEA Santa Cruz Unidad Académica Río Gallegos (UNPA) https://www.facebook.com/aguapatagonia/ <http://santacruzhidro.blogspot.com.ar/> http://santacruzhidro.blogspot.com.ar/ www.researchgate.net ------------------------------------------------------------------------------------------------------
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