Hello Alessandro, You don't mention whether or not your test points use the same ellipsoid as your shapes. If you know that they are the same then obviously no re-projection is necessary :)
Michael On 14 March 2011 11:55, Alessandro Ferrucci <[email protected]> wrote: > Well my question is probably actually simpler than joining the Geometries in > the Shapefile, I already have that covered. > > Here's the problem. > > I have 1 Polygon geometry. > > I have 1 Point created from Lat/Lon. > > I want to test whether that Point falls within the polygon. > > Do I have to do any transformations ? Or can I run the test with the > default Geometries created from the Shapefile and the lat/lon? > Thank you, > Alessandro > > On Sun, Mar 13, 2011 at 7:38 PM, Jody Garnett <[email protected]> > wrote: >> >> >> http://docs.codehaus.org/display/GEOTDOC/12+Using+a+Loop+to+Join+FeatureCollections >> >> -- >> Jody Garnett >> >> On Monday, 14 March 2011 at 8:30 AM, Alessandro Ferrucci wrote: >> >> Hello, >> I have a shapefile that I read using geotools and extract default >> geometries for all features in shapefile. >> all the geometries in the shapefile are polygons. >> The shapefile is in the GCS_North_American_1983 CRS. >> >> Then I have a set of Lat Lon Points. >> >> I would like to take those Lat Lon points and check if they fall within >> any of the feature geometries in the shapefile. >> >> anyone have example of this? >> I'm pretty sure I have to convert Lat Lon to JTS geom Point object? >> >> Given that fact I've read the shapefile without doing any explicit >> reprojection, do I have to reproject lat lon point to same CRS as is >> declared in shapefile? >> >> thanks a lot >> >> -- >> Signed, >> Alessandro Ferrucci >> >> ------------------------------------------------------------------------------ >> Colocation vs. Managed Hosting >> A question and answer guide to determining the best fit >> for your organization - today and in the future. >> http://p.sf.net/sfu/internap-sfd2d >> _______________________________________________ >> Geotools-gt2-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users >> > > > > -- > Signed, > Alessandro Ferrucci > > ------------------------------------------------------------------------------ > Colocation vs. Managed Hosting > A question and answer guide to determining the best fit > for your organization - today and in the future. > http://p.sf.net/sfu/internap-sfd2d > _______________________________________________ > Geotools-gt2-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > > ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
