[mapserver-users] Shapefile Modification

[Keith Baker]

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No attribute field :-(
Its things like roads and streams which aren't listed by which country
they are in.  I think doing it with is or isn't inside polygon is the
way to go...


On Mon, 2002-11-04 at 13:29, Tyler Mitchell wrote:
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> Is there an attribute/field in the shapefiles that you could use to speci=
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> which features to remove?  Is so, I would recommend the ogr2ogr tool (par=
t
> of www.remotesensing.org/gdal) to convert from shapefile to shapefile
> including a where clause like "where x =3D 'USA'".   Do you have a
> usa_polygon.shp file?  Do you have access to ArcView?
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>                       Keith Baker                                        =
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>                       <krbaker@metacarta.com>             To:       mapse=
rver-users <mapserver-users@lists.gis.umn.edu>    =20
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>                       owner-mapserver-users@lists.        Fax to:        =
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>                       gis.umn.edu                         Subject:  [maps=
erver-users] Shapefile Modification               =20
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>                       11/04/2002 09:31 AM                                =
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> I have some basic shapefiles of the world, and then I have tiger
> shapfiles.  The world shapefiles have some duplicated data such as US
> roads.  I'd like to trim all data within the US out of the world data.
> This seems like a somewhat common task so I am hoping there is a tool
> out there?  Something like trim north_american_highways.shp with
> usa_polygon.shp...  Hints? tips? evil vibes?
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