Hi Matthew, Your question is interesting. ogrinfo -where seemed to be the answer, but...
I tried ogrinfo with the -where "sql where" option with both MapInfo and PostGIS layers. In your case it should be: ogrinfo -ro -so -al -where "$WHERECLAUSE" "whole_shapefile.shp" The returned extent is always the same, regardless of the presence or composition of the -where clause, so it refers to the whole layer rather than to the selected features. (I'm using GDAL 1.9 dev) Is this the expected behaviour of ogrinfo -where "..."? Or sould -where affect the returned Extent too? Thank you all Sig Il giorno ven, 22/04/2011 alle 08.22 -0500, Matthew Pettis ha scritto: > Hi All, > > > I think this is the right list for the question below, as I cannot > find a different list that matches my question better. > > > I'm using ogr2ogr and ogrinfo (v1.4), and I want to extract the extent > from the result of a subsetting where argument. I have a solution > here that works but I'm wondering if I'm missing some more obvious > solution. In a bash script, I do the following (the core snippet > only, as I took out the shebang and option-getting/setting code:) > > > --------------------------- > rm -rf /tmp/tmpshpfile.* > > > ogr2ogr -where "$WHERECLAUSE" /tmp/tmpshpfile.shp "$FILE" > > > ogrinfo -ro -so -al /tmp/tmpshpfile.shp | \ > grep Extent | \ > tr -d '[:alpha:]:() -' | \ > tr ',' ' ' > > > rm -rf /tmp/tmpshpfile.* > --------------------------- > > > I can use it as follows: > > > --------------------------- > $ ./bbox.sh -f /path/to/shp/shp_counties.shp -w "COUNTY_NAME='Yellow > Medicine'" > 226206.484375 4934737.000000313007.250000 4979500.500000 > --------------------------- > > > Where the argument to '-w' is put into the '$WHERECLAUSE' variable in > the script. > > > This works. As I wrote, though, am I missing something obvious in > command-line switches to either of these programs that would simplify > this so I wouldn't have to use this script? Or is there some other, > better way of doing this? Also, is there a way to pipe the output of > ogr2ogr on stdout directly to the stdin of ogrinfo? > > > Thanks, > Matt > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
