Jorge ArĂŠvalo wrote:: > Hello, > > Context: GDAL WKT Raster Driver > > While creating the Dataset, I execute this query: > > SELECT srid, ST_AsText(extent), pixelsize_x, pixelsize_y, blocksize_x, > blocksize_y FROM raster_columns WHERE r_table_name = 'table' AND > r_column = 'rast' > > I have loaded a 3-band tiff file with gdal2tiles. Its pixel size is > 0.9. If I execute this line (over the result of the previous query): > > fPixelSizeX = atof(PQgetvalue(hPGresult, 0, 2)); > > I get 0.899999976158142 instead of 0.9.
Good. > The string obtained wiht PQgetvalue is "0.9", but, for any reason, > atof transform this string in 0.899999976158142. http://docs.sun.com/source/806-3568/ncg_goldberg.html > So, seems to be a > precission problem. think the string used by atof has any problem, but > I'm not sure Most computers suffer of this problem. > What should I do? You need to learn how to live with that problem :-) > I tried to change atof(nptr) for strtod(nptr, > (char**)NULL), but it didn't work... And it won't help. Best regards, -- Mateusz Loskot http://mateusz.loskot.net _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
