RS_Polygonize

Converts raster pixels into polygon geometries. For each connected region of pixels with the same value, returns a polygon geometry along with the pixel value. This is useful for vectorizing raster data.

Signatures

RS_Polygonize(raster: Raster, band: Int)

Parameters

Raster

required

The input raster.

Int

required

The band index (1-based) to polygonize.

Return type

An array of structs, each containing a polygon geometry and its corresponding pixel value.

Examples

SELECT RS_Polygonize(raster, 1) FROM my_raster_table

SELECT exploded.geom, exploded.value
FROM my_raster_table,
LATERAL VIEW explode(RS_Polygonize(raster, 1)) AS exploded

⌘I

Wherobots Cloud REST API

WherobotsDB

Vector tiles (PMTiles)

Havasu (Iceberg) table management

GeoStats and Map Matching

Rasterflow

Signatures

Parameters

Return type

Examples

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​Parameters

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​Examples

Signatures

Parameters

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Examples