for a qgis 1.8 python plugin I want to query the mean of all pixel values of a raster layer within a defined buffer around the current mouse position, not for an existing point layer.
For the buffer sth like this should work:
feat.geometry().asPoint() (3.5176e+06,5.4062e+06) buff_geom = feat.geometry().buffer(1000, 5) buff_geom.asPolygon() [[(3.5186e+06,5.4062e+06), (3.51855e+06,5.4059e+06), (3.51841e+06,5.40562e+06), (3.51819e+06,5.4054e+06), (3.51791e+06,5.40525e+06), (3.5176e+06,5.4052e+06), (3.51729e+06,5.40525e+06), (3.51701e+06,5.4054e+06),...]]
but now I try to find a solution to query all raster pixels within the buffer zone and calculate the mean, but I don't know how and if this is possible in QGIS 1.8 at all.
All I found is
QgsZonalStatistics, but that doesn't work for my task.
Does anybody have a solution for this or a better idea, how to solve this?