Changes between Version 1 and Version 2 of UsersWikiExamplesOverlayTables


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Timestamp:
04/14/09 09:09:57 (16 years ago)
Author:
pierre
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  • UsersWikiExamplesOverlayTables

    v1 v2  
    11= Examples Overlay Tables =
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    3 Bill Thoen [http://postgis.refractions.net/pipermail/postgis-users/2006-September/013091.html asks]:
     3'''Bill Thoen [http://postgis.refractions.net/pipermail/postgis-users/2006-September/013091.html asks]:'''
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    55"Using PopstgreSQL/PostGIS, what are the steps I need to use to split one layer of polygons with another layer and also maintain data attrributes among the polygons that are split? For example, I've got corn and soybean field polygons that need to be split at the borders of overlaying CLU (Common Land Unit) polygons, and if a corn field crosses under a CLU boundary, I want to split the field at the CLU boundary and copy the orignal field id, crop code and other attributes into the two (or more) resulting farm field polygons (and probably assign a new unique polygon id to them all too.) "
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    7 Paul Ramsey [http://postgis.refractions.net/pipermail/postgis-users/2006-September/013093.html answers]:
     7'''Paul Ramsey [http://postgis.refractions.net/pipermail/postgis-users/2006-September/013093.html answers]:'''
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    28 Kevin Neufeld answers:
     28'''Kevin Neufeld answers:'''
    2929
    3030Given two polygonal datasets, fields and clu boundaries,