Thank you all for the tips. I've actually managed to do the same when I changed the CRS to the appropriate UTM.
On 11/21/09, John C. Tull <jct...@gmail.com> wrote: > Hi Nik, > > On Nov 20, 2009, at 12:04 AM, Nik Go wrote: > >> >> Hello. I'm trying to calculate area of my shapefiles but I'm not really >> sure if I'm doing it right. I expect results to be in meters (sq meters >> or sq. kilometers) but read out is in sq. degrees. I'm told that I have >> shapefiles in geographic coordinate system WGS 84 but I don't know to >> convert this to a projected coordinate system from qgis. >> >> So, how should I go about doing >> converting from geographic coordinated to projected coordinates so I could >> determine/calculate area >> determine distance between points >> convert sq. degrees to sq. meters? > > You can change your project CRS from the default geographic coordinate > system of WGS84 to a projected coordinate system based on meters, such as a > UTM zone. Turn on the "Enable 'on the fly' CRS transformation, and you will > be set for vector data. If you have raster data, Qgis does not handle on the > fly transforms on them. For those, I recommend looking at gdalwarp, part of > the gdal tools. In particular, look at the vrt output format so you do not > create numerous large file. A vrt invokes gdal to, effectively, perform an > 'on the fly' reprojection of the original raster data. > > Regards, > John _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user