[gdal-dev] Enquiry
Dear Sir/Madam, I'm a student in HSR, Rapperswil and I am trying to clip a SQLite file I converted .osm.pbf file of liechtenstein to a .sqlite file, and then tried to clip it with the following codes, (is it -clipsrc or -clipdst ogr2ogr -f SQLite liechtenstein.sqlite liechtenstein-latest.osm.pbg -skipfailures -dsco SPATIALITE=yes -clipsrc 47.1386361 9.5231616 47.1404971 9.5266377 Also, I tried to clip the map of Singapore but was unsuccessful, the following is the code ogr2ogr -f SQLite singapore.sqlite malaysia-singapore-brunei-latest.osm.pbg -skipfailures -dsco -clipsrc singapore.geojson Do I have to convert to .shp file? Do you have any suggestions? Thank you! Hao Feng. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Enquiry
Hao, The extents for -clipsrc have to be represented in the source's reference system. You can use gdaltransform [1] if you want to convert your lat/long to the source's ref system. [1]: http://www.gdal.org/gdaltransform.html On Wed, Mar 19, 2014 at 1:16 PM, Tan Hao Feng h...@hsr.ch wrote: Dear Sir/Madam, I'm a student in HSR, Rapperswil and I am trying to clip a SQLite file I converted .osm.pbf file of liechtenstein to a .sqlite file, and then tried to clip it with the following codes, (is it -clipsrc or -clipdst ogr2ogr -f SQLite liechtenstein.sqlite liechtenstein-latest.osm.pbg -skipfailures -dsco SPATIALITE=yes -clipsrc 47.1386361 9.5231616 47.1404971 9.5266377 Also, I tried to clip the map of Singapore but was unsuccessful, the following is the code ogr2ogr -f SQLite singapore.sqlite malaysia-singapore-brunei-latest.osm.pbg -skipfailures -dsco -clipsrc singapore.geojson Do I have to convert to .shp file? Do you have any suggestions? Thank you! Hao Feng. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev -- Best regards, Chaitanya kumar CH. +91-9494447584 17.2416N 80.1426E ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Enquiry
Tan Hao Feng htan at hsr.ch writes: Dear Sir/Madam, I'm a student in HSR, Rapperswil and I am trying to clip a SQLite file I converted .osm.pbf file of liechtenstein to a .sqlite file, and then tried to clip it with the following codes, (is it -clipsrc or -clipdstogr2ogr -f SQLite liechtenstein.sqlite liechtenstein-latest.osm.pbg -skipfailures -dsco SPATIALITE=yes -clipsrc 47.1386361 9.5231616 47.1404971 9.5266377 Also, I tried to clip the map of Singapore but was unsuccessful, the following is the code ogr2ogr -f SQLite singapore.sqlite malaysia-singapore-brunei-latest.osm.pbg -skipfailures -dsco -clipsrc singapore.geojson Do I have to convert to .shp file? Do you have any suggestions? Thank you! Hao Feng. Hi, I suggest to check the names of your input files. Are you sure they are .pbg and not .pbf? Clipsrc takes coordinates in the source projection, clipdst in target projection. Both mean the same if you do not use different -s_srs and -t_srs parameters. Did you not find the information from manual page http://gdal.org/ogr2ogr.html? Read also the manual page of SQLite/Spatialite format. I bet that you will want to create Spatialite database and not a regular FDO database. Here is a fast running query that worked for me: ogr2ogr -f SQLite -dsco spatialite=yes clip.sqlite finland-latest.pbf -gt 2 -progress --config OGR_SQLITE_SYNCHRONOUS OFF --config OSM_COMPRESS_NODES YES -clipsrc 27 65 28 66 -Jukka Rahkonen- ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Enquiry
Hi, It may not be a good idea to use -clipsrc with OpenStreetMap data at least without some thinking. Clipping is cutting linestrings like highways which intersect the clipping geometry into pieces and that is changing the geometry type of clipped highway from linestring into multilinestring. Such a highway cannot be stored into Spatialite table lines where it normally belongs because of geometry type constraint. You can add -nlt PROMOTE_TO_MULTI parameter into ogr2ogr but then all the highways will be converted into multilinestrings. It may be OK for you to do so, but think about that first. Alternative way for clipping OSM data would be to use special tools like Osmosis. I believe is has an option that selects the intersecting features without cutting them into pieces. -Jukka Rahkonen- ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
