measurements

This module contains functions that compute measurements of distance, area and angles. There are also functions to compute geometry values determined by measurements.

ST_MINKOWSKIDISTANCE

ST_MINKOWSKIDISTANCE(geog [, p])

Description

Calculate the Minkowski p-norm distance between two features.

Input parameters

• geojsons: ARRAY array of features in GeoJSON format casted to STRING.

• p (optional): FLOAT64 minkowski p-norm distance parameter. 1: Manhattan distance. 2: Euclidean distance. 1 =< p <= infinity. By default p is 2.

Return type

ARRAY

Examples

SELECT CARTO.CARTO.ST_MINKOWSKIDISTANCE(
  ARRAY_CONSTRUCT(
    ST_ASGEOJSON(ST_POINT(10,10))::STRING,
    ST_ASGEOJSON(ST_POINT(13,10))::STRING
  )
);
-- [ [ 0, 3.333333333333333e-01 ], [ 3.333333333333333e-01, 0 ] ]

SELECT CARTO.CARTO.ST_MINKOWSKIDISTANCE(
  ARRAY_CONSTRUCT(
    ST_ASGEOJSON(ST_POINT(10,10))::STRING,
    ST_ASGEOJSON(ST_POINT(13,10))::STRING
  ),
  2
);
-- [ [ 0, 3.333333333333333e-01 ], [ 3.333333333333333e-01, 0 ] ]

Additional examples

• Minkowski distance to perform cannibalization analysis