Hi all, gdal_grid misses the option -ot Float32 as a result I get: ERROR 5: Pixel type must be Float32 It was working before. QGIS 2.18.0 All the best. -- Paolo Cavallini - www.faunalia.eu QGIS & PostGIS courses: http://www.faunalia.eu/training.html https://www.google.com/trends/explore?date=all&geo=IT&q=qgis,arcgis