Changes between Version 10 and Version 11 of PostGIS_Raster_SoC_Idea_2012/Distance_Analysis_Tools/document
- Timestamp:
- Jul 12, 2012, 10:50:46 PM (12 years ago)
Legend:
- Unmodified
- Added
- Removed
- Modified
-
PostGIS_Raster_SoC_Idea_2012/Distance_Analysis_Tools/document
v10 v11 32 32 ==== 1. The raster source approach ==== 33 33 34 The first approach is similar to what is found in most GIS package. The source points (or geometries) are converted to a raster of sources and this raster is passed to the function. The function iterates over the pixels (or over the source points???) assigning the distance to the nearest point (or assigning minimum values to pixels within a circle progressively growing around each point???).34 The first approach is similar to what is found in most GIS package. The source points (or geometries) are converted to a raster of sources and this raster is passed to the function. The function iterates over the pixels (or over the source points???) assigning the distance to the nearest point (or assigning minimum values to pixels within a circle progressively growing around each point???). 35 35 36 36 Converting one or a set of source geometries to one raster can be performed like this in PostGIS:
