Hi, 2015-01-15 11:20 GMT+01:00 Even Rouault <[email protected]>: > You can describe a full circle with 3 points by specifying (P1,P2,P1) where > P1-P2 defines a diameter of the circle, but there's an ambiguity on the > orientation to follow the CircularString (which shouldn't matter if the > CircularString is part of a CurvePolygon) and some implementation might not > like > it (OGR should be fine) > Indeed using 5 points is better. You can define (P1,P2,P3,P4,P1) where all > points are on the circle. For example P1-P3 and P2-P4 being 2 diameters, but > that's not a requirement.
thanks for the confirmation Even. Martin -- Martin Landa http://geo.fsv.cvut.cz/gwiki/Landa http://gismentors.eu/mentors/landa _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
