magerlin <MAP@...> writes: > > I have deleted large geographical parts of a shape file because I only needed > a very little part of it. > > But using "Zoom to layer extent" still zoom to the extent of the original > shape file. > > I have tried to re-save the file using save-as, specifying CRS etc. but no > change. > > In "Layer properties, Metadata" I can read: > > /Extents: > In layer spatial reference system units : xMin,yMin 622219.27,1154061.75 : > xMax,yMax 643120.73,1204120.54/ > > Where are these data stored and how do I update it?
Hi, >From http://gdal.org/ogr/drv_shapefile.html Spatial extent Shapefiles store the layer spatial extent in the .SHP file. The layer spatial extent is automatically updated when inserting a new feature in a shapefile. However when updating an existing feature, if its previous shape was touching the bounding box of the layer extent but the updated shape does not touch the new extent, the computed extent will not be correct. It is then necessary to force a recomputation by invoking the SQL 'RECOMPUTE EXTENT ON <tablename>' via the datasource ExecuteSQL() method. The same applies for the deletion of a shape. Note: RECOMPUTE EXTENT ON is available in OGR >= 1.9.0. Thus RECOMPUTE EXTENT ON should help, or then saving the modified data into new shapefile and renaming that back afterwards. -Jukka Rahkonen- _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
