Is there a command line tool for OGR?
Taken from The Geospatial Desktop book. The ogr2ogr command line tool is an easy way to filter, reproject and trim columns in a shapefile. The workflow below shows how we can approximate the following ogr2ogr command with the OGR api using a decently large parcel shapefile from King County GIS .
How to open a shapefile in OGR GDAL?
This code example opens a shapefile and returns the number of features in it. Solution mined from: [ web site] import os from osgeo import ogr daShapefile = r”C:\\Temp\\Voting_Centers_and_Ballot_Sites.shp” driver = ogr.GetDriverByName(‘ESRI Shapefile’) dataSource = driver.Open(daShapefile, 0) # 0 means read-only. 1 means writeable.
Is there a command line tool to trim a shapefile?
The ogr2ogr command line tool is an easy way to filter, reproject and trim columns in a shapefile. The workflow below shows how we can approximate the following ogr2ogr command with the OGR api using a decently large parcel shapefile from King County GIS .
How to create a new table in ogr2ogr?
The CSV file volcano_data.txt contains the following fields, separated by a tab character ( ): Taken from The Geospatial Desktop book. This recipe creates a new table in an existing PostGIS database. The ogr2ogr command line tool is an easy way to filter, reproject and trim columns in a shapefile.
How to create a vector file using GDAL / OGR?
Given two files that both have an id field, this will produce a vector file with the part of file1.shp that doesn’t intersect with file2.shp: ogr2ogr diff.shp file1.shp -dialect sqlite \\ -sql “SELECT ST_Difference (a.Geometry, b.Geometry) AS Geometry, a.id \\ FROM file1 a LEFT JOIN ‘file2.shp’.file2 b USING (id) WHERE a.Geometry != b.Geometry”
Where do I find the names of OGR vector formats?
The exact names are the ones used on the OGR Vector Formats page in the “Code” column ( [ formats website ]). This is the same names returned when you enter ogrinfo –formats on the command line. This code example opens a shapefile and returns the number of features in it.