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Results tagged with ogr2ogr
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user 77230
ogr2ogr is an open source command line utility popular for converting to and from various vector spatial data formats.
1
vote
How to create one buffer around all the points using ogr2ogr?
.
$ ogr2ogr houses.buf.csv a1.houses.csv \
-lco GEOMETRY=AS_WKT -dialect SQLITE -sql \
"SELECT ST_Buffer(ST_Union(GEOMETRY),.001,1)
AS WKT, 1 AS Name FROM 'a1.houses'"
$ ogr2ogr houses.buf.kml houses.buf.csv …
- 568
0
votes
Gdal Ogr2Ogr Split polygon shapefile by line shapefile
understand the ST_Split approach, I instead simply by hand extended the boundary to wrap around the back side of the half (of "F") I wanted, making a closed clipping polygon "A", and then used the documented ogr2ogr …
- 568
0
votes
How to use ogr2ogr -clipdstsql?
.
$ ogr2ogr zxl.buf.csv :memory: -lco GEOMETRY=AS_WKT -sql \
"SELECT ST_Buffer(ST_GeomFromText('POLYGON ((...))'),-.001,1) AS WKT"
$ ogr2ogr zxl.0.lines.csv zxl.0.Q.csv -sql 'SELECT Name FROM "zxl.0.Q" …
- 568
0
votes
How to extract segments and compute their length using ogr2ogr?
.
$ cat Makefile
BB = ogr2ogr -dialect SQLITE -lco GEOMETRY=AS_WKT $@ $<
FF = FROM "$(basename $<)"
mm.csv:ll.csv
cat $<
$(BB) \
-sql 'SELECT (DissolveSegments(GEOMETRY)) AS WKT $(FF)' … $ make oo.csv
cat ll.csv
WKT
"POLYGON ((0 0,5 0,5 9,0 9,0 0))"
"POLYGON ((1 1,5 1,5 9,1 9,1 1))"
ogr2ogr -dialect SQLITE -lco GEOMETRY=AS_WKT mm.csv ll.csv \
-sql 'SELECT (DissolveSegments(GEOMETRY)) AS …
- 568
3
votes
Constructing WKT POINT from GeoJSON data fields in OGR
Let's try that two step approach:
Step 1:
$ ogr2ogr qingfujie_roads.csv qingfujie_roads.geojson -dialect SQLite -sql \
'SELECT land_id AS name, xcenter AS lon, ycenter AS lat FROM "qingfujie_roads"'
$ …
- 568