ST_LineFromEncodedPolyline
Name
ST_LineFromEncodedPolyline — Creates a LineString from an Encoded Polyline.
Synopsis
geometry
ST_LineFromEncodedPolyline
(
text
polyline
, integer
precision=5
)
;
Description
Creates a LineString from an Encoded Polyline string.
Optional
precision
specifies how many decimal places will be preserved in Encoded Polyline. Value should be the same on encoding and decoding, or coordinates will be incorrect.
See http://developers.google.com/maps/documentation/utilities/polylinealgorithm
Availability: 2.2.0
Examples
-- Create a line string from a polyline
SELECT ST_AsEWKT(ST_LineFromEncodedPolyline('_p~iF~ps|U_ulLnnqC_mqNvxq`@'));
-- result --
SRID=4326;LINESTRING(-120.2 38.5,-120.95 40.7,-126.453 43.252)
-- Select different precision that was used for polyline encoding
SELECT ST_AsEWKT(ST_LineFromEncodedPolyline('_p~iF~ps|U_ulLnnqC_mqNvxq`@',6));
-- result --
SRID=4326;LINESTRING(-12.02 3.85,-12.095 4.07,-12.6453 4.3252)