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| |
| # ST_DistanceSphere |
| |
| Introduction: Return the haversine / great-circle distance of A using a given earth radius (default radius: 6371008.0). Unit is meter. Compared to `ST_Distance` + `ST_Transform`, it works better for datasets that cover large regions such as continents or the entire planet. It is equivalent to PostGIS `ST_Distance(geography, use_spheroid=false)` and `ST_DistanceSphere` function and produces nearly identical results. It provides faster but less accurate result compared to `ST_DistanceSpheroid`. |
| |
| 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. For non-point data, we first take the centroids of both geometries and then compute the distance. |
| |
| !!!note |
| By default, this function uses lon/lat order since `v1.5.0`. Before, it used lat/lon order. |
| |
|  |
| |
| Format: `ST_DistanceSphere (A: Geometry)` |
| |
| Return type: `Double` |
| |
| Since: `v1.4.1` |
| |
| SQL Example |
| |
| ```sql |
| SELECT ST_DistanceSphere(ST_GeomFromWKT('POINT (-0.56 51.3168)'), ST_GeomFromWKT('POINT (-3.1883 55.9533)')) |
| ``` |
| |
| Output: |
| |
| ``` |
| 543796.9506134904 |
| ``` |
| |
| SQL Example |
| |
| ```sql |
| SELECT ST_DistanceSphere(ST_GeomFromWKT('POINT (-0.56 51.3168)'), ST_GeomFromWKT('POINT (-3.1883 55.9533)'), 6378137.0) |
| ``` |
| |
| Output: |
| |
| ``` |
| 544405.4459192449 |
| ``` |
