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12 lines
985 B
Plaintext
12 lines
985 B
Plaintext
{
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"name": "extend",
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"type": "function",
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"groups": ["GeometryGroup"],
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"description": "Extends the start and end of a linestring geometry by a specified amount. Lines are extended using the bearing of the first and last segment in the line. For a multilinestring, all the parts are extended. Distances are in the Spatial Reference System of this geometry.",
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"arguments": [ {"arg":"geometry","description":"a (multi)linestring geometry"},
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{"arg":"start_distance","description":"distance to extend the start of the line"},
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{"arg":"end_distance","description":"distance to extend the end of the line."}],
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"examples": [ { "expression":"geom_to_wkt(extend(geom_from_wkt('LineString(0 0, 1 0, 1 1)'),1,2))", "returns":"'LineString (-1 0, 1 0, 1 3)'"},
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{ "expression":"geom_to_wkt(extend(geom_from_wkt('MultiLineString((0 0, 1 0, 1 1), (2 2, 0 2, 0 5))'),1,2))", "returns":"'MultiLineString ((-1 0, 1 0, 1 3),(3 2, 0 2, 0 7))'"}]
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}
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