Changes between Version 120 and Version 121 of WKTRaster/SpecificationWorking01


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Timestamp:
Apr 7, 2010, 11:27:07 AM (14 years ago)
Author:
pracine
Comment:

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  • WKTRaster/SpecificationWorking01

    v120 v121  
    222222 There is already a ST_raster_envelope() function but this has actually the behavior of the ST_ConvexHull(raster) described below. There is also a ticket (#348) related to this function: http://trac.osgeo.org/postgis/ticket/348
    223223
    224 [[Image(WKTRasterEnvelopeConvexHullAndShape.gif)]]
     224[[Image(WKTRasterEnvelopeConvexHullAndPolygon.gif)]]
    225225
    226226'''ST_ConvexHull(raster) -> polygon geometry''' - Returns the minimum convex geometry that encloses every pixel from the raster.