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| |
| # ST_LengthSpheroid |
| |
| Introduction: Return the geodesic perimeter of A using WGS84 spheroid. Unit is meter. Works better for large geometries (country level) compared to `ST_Length` + `ST_Transform`. It is equivalent to PostGIS `ST_Length(geography, use_spheroid=true)` and `ST_LengthSpheroid` function and produces nearly identical results. |
| |
| Geometry must be in EPSG:4326 (WGS84) projection and must be in ==lon/lat== order. You can use ==ST_FlipCoordinates== to swap lat and lon. |
| |
| !!!note |
| By default, this function uses lon/lat order since `v1.5.0`. Before, it used lat/lon order. |
| |
| !!!Warning |
| Since `v1.7.0`, this function only supports LineString, MultiLineString, and GeometryCollections containing linear geometries. Use [ST_Perimeter](ST_Perimeter.md) for polygons. |
| |
|  |
| |
| Format: `ST_LengthSpheroid (A: Geometry)` |
| |
| Return type: `Double` |
| |
| Since: `v1.4.1` |
| |
| SQL Example |
| |
| ```sql |
| SELECT ST_LengthSpheroid(ST_GeomFromWKT('LINESTRING (0 0, 2 0)')) |
| ``` |
| |
| Output: |
| |
| ``` |
| 222638.98158654713 |
| ``` |
