rpe
Joined: 14/03/2007 15:59:45
Messages: 4
Location: Wales
Offline
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I am currently working on a direct link from geonames data to shapefiles (mainly gadm, unless I find something better).
In some cases (e.g., Mertert and Wormeldange in Luxembourg), the lat/long for the admin3 entries lie outside of the gadm shapes, but are just inside when plotted on a Google map, due to the fact that the centre of the Mosel is the border.
So far, I have (PostGIS) been using ST_PointOnSurface to ensure that any points calculated from a polygon are on the shape (basically centred, but adjusted to be on the surface of the polygon).
How have the co-ordinates for admin areas been established? I am quite happy to ensure that the offending items are modified if that is OK with the community.
Regards,
Robert
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