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At the north pole, any "straight line" path from that point is automatically going due south, until you change direction. Likewise, at the south pole, any direct route away is going due north. All "straight lines" (better known as great circles or geodesics), passing through the poles, are known as meridians (or lines of constant longitude) and are ...


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To add some visual clarification-


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Try this : import com.vividsolutions.jts.geom.Coordinate; import javax.measure.unit.NonSI; import org.jscience.geography.coordinates.LatLong; import org.jscience.geography.coordinates.UTM; import org.jscience.geography.coordinates.crs.ReferenceEllipsoid; This method makes the conversion in JAVA and return a Coordinate. Is easy to obtain X and Y from ...


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It is possible using the QGIS "QSpatiaLite" plugin: Install QSpatiaLite plugin create SpatiaLite database connection Open QSpatialite plugin import both polygon and point shapefile to spatialite database (i used the layers "gis_se" as my point layer and "zippoly_gisse" as polygon layer) run a sql statement like select point.id, point.zipcode, poly.id, ...



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