Changes between Version 8 and Version 9 of PostGIS_Raster_SoC_Idea_2012/Distance_Analysis_Tools/document


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Timestamp:
Jul 12, 2012, 10:37:32 PM (12 years ago)
Author:
qliu
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  • PostGIS_Raster_SoC_Idea_2012/Distance_Analysis_Tools/document

    v8 v9  
    20203.      Sometimes the resolution of the desired raster is so high that the whole raster coverage cannot be stored in one PostgreSQL row. The approach must be able to produce a tiled raster coverage stored into many rows.[[BR]]
    21214.      Source geometries might be outside the extent of the desired raster.[[BR]]
    22 5.      The approach should work well in a number of situations: [[BR]]
    23   a.    small number of sources vs low resolution raster[[BR]]
    24   b.    small number of sources vs high resolution raster [[BR]]
    25   c.    large number of sources vs low resolution [[BR]]
    26   d.    large number of sources vs high resolution Large raster coverage[[BR]]
     225.      The approach should work well in a number of situations:
     23  a.    small number of sources vs low resolution raster
     24  b.    small number of sources vs high resolution raster
     25  c.    large number of sources vs low resolution
     26  d.    large number of sources vs high resolution Large raster coverage
    27276.      The user can specify a maximum distance to the source. When the source is too far from the geometry it gets assigned a nodata value.[[BR]]
    28287.      We want the implementation to be generic enough to be reused to implement more general interpolation methods like nearest neighbor, IDW, spline or kriging. Otherwise we want it to be generic enough to be reused to implement more general cost distance methods.[[BR]]