Opened 7 years ago
Closed 7 years ago
#3903 closed defect (invalid)
ST_AsGeoJSON not working with LineStringM
| Reported by: | ccsmith | Owned by: | pramsey |
|---|---|---|---|
| Priority: | medium | Milestone: | PostGIS 2.4.1 |
| Component: | postgis | Version: | 2.1.x |
| Keywords: | ST_AsGeoJSON, LineStringM | Cc: |
Description
When using ST_AsGeoJSON with a LineStringM or LineStringMZ (and coordinate values for the M dimension) geometry there is no resulting coordinate output for the M dimension.
—POSTGIS VERSION SELECT PostGIS_full_version(); "POSTGIS="2.1.8 r13780" GEOS="3.5.0-CAPI-1.9.0 r4084" PROJ="Rel. 4.9.2, 08 September 2015" GDAL="GDAL 1.11.5, released 2016/07/01" LIBXML="2.9.1" LIBJSON="UNKNOWN" RASTER"
—LINESTRING select ST_ASgeojson(ST_GeomFromText('LINESTRING(1 0, 2 0, 4 0)')); {"type":"LineString","coordinates":1,0],[2,0],[4,0}
—LINESTRINGM select ST_ASgeojson(ST_GeomFromText('LINESTRINGM(1 0 0, 2 0 10, 4 0 20)')); {"type":"LineString","coordinates":[[1,0],[2,0],[4,0]]}
—LINESTRINGZ select ST_ASgeojson(ST_GeomFromText('LINESTRINGz(1 0 0, 2 0 10, 4 0 20)')) ; {"type":"LineString","coordinates":1,0,0],[2,0,10],[4,0,20}
—LINESTRINGZM select ST_ASgeojson(ST_GeomFromText('LINESTRINGZM(1 0 0 0, 2 0 10 0, 4 0 20 0)')) {"type":"LineString","coordinates":[[1,0,0],[2,0,10],[4,0,20]]}
According to both the old and new specs, GeoJson has no business including anything other than X, Y and optionally Z.
https://tools.ietf.org/html/rfc7946#page-7