ST_ContainsProperly
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## Name

ST_ContainsProperly — Return true if rastB intersects the interior of rastA but not the boundary or exterior of rastA.

## Synopsis

`boolean ST_ContainsProperly(` raster rastA , integer nbandA , raster rastB , integer nbandB `)`;

`boolean ST_ContainsProperly(` raster rastA , raster rastB `)`;

## Description

Raster rastA contains properly rastB if rastB intersects the interior of rastA but not the boundary or exterior of rastA. If the band number is not provided (or set to NULL), only the convex hull of the raster is considered in the test. If the band number is provided, only those pixels with value (not NODATA) are considered in the test.

Raster rastA does not contain properly itself but does contain itself.

This function will make use of any indexes that may be available on the rasters.

To test the spatial relationship of a raster and a geometry, use ST_Polygon on the raster, e.g. ST_ContainsProperly(ST_Polygon(raster), geometry) or ST_ContainsProperly(geometry, ST_Polygon(raster)).

Availability: 2.1.0

## Examples

    SELECT r1.rid, r2.rid, ST_ContainsProperly(r1.rast, 1, r2.rast, 1) FROM dummy_rast r1 CROSS JOIN dummy_rast r2 WHERE r1.rid = 2;

     rid | rid | st_containsproperly
    -----+-----+---------------------
       2 |   1 | f
       2 |   2 | f

## See Also

ST_Intersects, ST_Contains

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