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How do I create a point 1000 meters away from a reference point?

The ST_Translate only supports geometry type.

I also tried using ST_GeomFromText but that returns a unit and not in meters.

Here is my sample query:

SELECT ST_AsText ( ST_Translate ( ST_GeogFromText('SRID=4326;POINT(-70.01 43.27)'), 1000, 0 ) );

Is there a way that I can convert the output of ST_Translate into meters?

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3 Answers 3

You want ST_Project, which takes in a point, direction and distance

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To make a meter translation you need a geometry that has a spatial reference system in meter unit. The srid code 31997 for example is metric, so what need to do is feed a metric geometry to st_translate and get back into the desired output spatial reference system.

SELECT st_AsText ( st_transform( st_translate( st_transform( st_GeomFromText('SRID=4326;POINT(-70.01 43.27)'), 31997 ), 1000, 0 ), 4326 ) );
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do you know if mercator (EPSG: 3857) is also in meters units? I do a couple of tests with the ST_Buffer function and they don't return the same area – opensas Nov 16 '13 at 4:11
Using srid 31997 only confuses things. – Martin F Nov 18 '13 at 23:19
Mercator 3857 is metric system too. Values could change a little based on projection used. Since some projections change the shape of earth figure is expected some value change due to convertion from spherical to a plane(projected) reference system. As answered the srid used is just an example. You can use any that suits better your case. – cavila Nov 20 '13 at 19:35

Use Geometry contructor


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ST_GeomFromText is returning a unit and not a meter. How do I convert it to meters. – user181677 Dec 19 '12 at 16:46
ST_Transform(the_geom, new_srid) , where new_srid should system that uses metric and is well defiend on your are. More information – simplexio Dec 20 '12 at 7:39

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