2025-07-03 20:06:43 +02:00

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{
"name": "is_valid",
"type": "function",
"groups": ["GeometryGroup"],
"description": "Returns TRUE if a geometry is valid; if it is well-formed in 2D according to the OGC rules.",
"arguments": [{
"arg": "geometry",
"description": "a geometry"
}],
"examples": [{
"expression": "is_valid(@geometry)",
"returns": "checks if the current feature's geometry is valid"
},{
"expression": "is_valid(geom_from_wkt('LINESTRING(0 0, 1 1, 2 2, 0 0)'))",
"returns": "TRUE"
}, {
"expression": "is_valid(geom_from_wkt('LINESTRING(0 0)'))",
"returns": "FALSE"
}],
"tags": ["rules", "valid", "ogc", "according", "formed"]
}