I tried that first. It was way off. I think by a factor of cos(lat)**2.
On 01/15/2012 03:24 PM, Toby Reinicke wrote:
Do you have the same issue if you just use ring.getArea() function? On 15 Jan 2012, at 18:31, Jim White<[email protected]> wrote:Hi, I use this to calculate the number of acres enclosed by a linestring: ring = new OpenLayers.Geometry.LinearRing(geometry.getVertices()); area = ring.getGeodesicArea(new OpenLayers.Projection("EPSG:900913")); area = Math.floor(Math.abs(area*0.000247105381)); The calculated area consistently produces results that are 2-3% too small. Is this an error in my code or is my data the problem? Thanks, Jim White _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
_______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
