Hi fellows This is my first post in this list. I've been using QGIS since the end of last year. I run QGIS on a UBUNTU 12.04 64 bits system.
My purpose is to visualize and analyze fishery and oceanography information on a GIS platform. I'm biologist / oceanographer and I work at Sao Paulo Fisheries Institute, Brazil. Well, I'd like to calculate some basic statistics (mean, median, maximum, minimum, sd) from a raster layer. At http://poet.jpl.nasa.gov/ I got the mean sea surface temperature off southwestern Brazilian coast for some months. I downloaded the data in ARC GRID ASCII format. They can be visualized easily on QGIS as a raster layer. I also have a shape with a polygon that delimitates my area of interest. I'd like to calculate the mean, max, min, etc. temperatures for this specific area. I learned to do this procedure in gvSIG (in Spanish, sorry): SEXTANTE > HERRAMIENTAS BÁSICAS PARA CAPAS RASTER > CORTAR CAPA RASTER COM CAPA DE POLÍGONOS SEXTANTE > HERRAMIENTAS BÁSICAS PARA CAPAS RASTER > ESTADÍSDICAS BÁSICAS However I did not find a way to do these calculations in QGIS. Thanks in advance for any guidance. All the best, Antonio Olinto
_______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user