MarkLogic 9 Product Documentationgeo functions (Geospatial Operations)
Use the following geospatial built-in functions to perform operations on geospatial values, such as region containment or intersection, and conversion between MarkLogic geospatial primitive values and standard formats such as WKT.
41 functions
| Function name | Description |
|---|---|
| geo:approx-center | Return a point approximating the center of the given region. |
| geo:arc-intersection | Returns the point at the intersection of two arcs. |
| geo:bearing | Returns the true bearing in radians of the path from the first point to the second. |
| geo:bounding-boxes | Returns a sequence of boxes that bound the given region. |
| geo:box-intersects | Returns true if the box intersects with a region. |
| geo:circle-intersects | Returns true if the circle intersects with a region. |
| geo:circle-polygon | Construct a polygon approximating a circle. |
| geo:complex-polygon-contains | Returns true if the complex-polygon contains a region. |
| geo:complex-polygon-intersects | Returns true if the complex-polygon intersects with a region. |
| geo:coordinate-system-canonical | Get the canonical name for the coordinate system. |
| geo:count-distinct-vertices | Return a count of the distinct number of vertices in a region, taking tolerance into account. |
| geo:count-vertices | This function returns a count of the number of vertices in a region. |
| geo:default-coordinate-system | Get the canonical name for the coordinate system currently in effect. |
| geo:destination | Returns the point at the given distance (in units) along the given bearing (in radians) from the starting point. |
| geo:distance | Returns the distance (in units) between two points. |
| geo:distance-convert | This function converts a distance from one unit of measure to another. |
| geo:ellipse-polygon | Construct a polygon approximating an ellipse. |
| geo:geohash-decode | Given a geohash string, return the bounding box for that hash. |
| geo:geohash-decode-point | Given a geohash string, return the point for that hash. |
| geo:geohash-encode | Compute a set of covering geohashes for the given region, to the given level of precision. |
| geo:geohash-neighbors | Given a geohash string, return hashes for the neighbors. |
| geo:geohash-precision-dimensions | Given a geohash string, return the height and width for the given precision. |
| geo:geohash-subhashes | Given a geohash string, return the 32 subhashes. |
| geo:interior-point | This function returns a point that is guaranteed to be inside the bounds of the given region. |
| geo:parse-wkb | Returns a sequence of geospatial regions parsed from Well-Known Binary format. |
| geo:parse-wkt | Returns a sequence of geospatial regions parsed from Well-Known Text format. |
| geo:polygon-contains | Returns true if the polygon contains a region. |
| geo:polygon-intersects | Returns true if the polygon intersects with a region. |
| geo:region-affine-transform | Perform an affine transformation on a geospatial region. |
| geo:region-approximate | This function returns a simplified approximation of the region, using the Douglas-Peucker algorithm. |
| geo:region-clean | This function fixes various problems with the region or raises an error if it is not repairable. |
| geo:region-contains | Returns true if one region contains the other region. |
| geo:region-de9im | Calculates the Dimensionally Extended nine-Intersection Matrix (DE-9IM) of two geospatial regions. |
| geo:region-intersects | Returns true if the target region intersects with a region. |
| geo:region-relate | Compares geospatial regions based on a specified relationship. |
| geo:remove-duplicate-vertices | Remove duplicate (adjacent) vertices. |
| geo:shortest-distance | Returns the great circle distance (in units) between a point and a region. |
| geo:to-wkb | Returns a binary node in Well-Known Binary format. |
| geo:to-wkt | Returns a sequence of strings in Well-Known Text format. |
| geo:validate-wkb | Returns true if the binary data can be parsed as WKB into a supported region type. |
| geo:validate-wkt | Returns true if the string is valid Well-Known Text for a supported region type. |