Dan,
you can't do operations on geometries with OGR SQL, but selecting it.
You'd typically need to use the ST_PointN() from Spatialite with the
SQLite dialect
Even
Le 31/05/2024 à 00:32, Dan Jacobson via gdal-dev a écrit :
Hi. I will add an example to
https://gdal.org/user/ogr_sql_dialect.html#changing-the-type-of-the-fields
showing users how to e.g., CAST LINESTRING Z to POINTS Z, e.g.,
to extract the points from:
$ ogrinfo 0.lines.kml -q -sql 'SELECT "_ogr_geometry_" FROM "0"'
Layer name: 0
OGRFeature(0):1
LINESTRING Z (-100.790056666679 36.3802233333333 1000,-100...
Alas, there are no examples I can find of how to write it.
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