It sounds like you have a polygon containment forest: a collection of rooted trees whose roots are outer polygons, children are polygonal holes, grand-children are polygonal islands inside holes, etc. You can certainly represent containment in JavaScript, but it's not necessary for rendering. Therefore the Google Maps API does not represent containment.
There is an unfortunate caveat. Many browsers use Canvas to render vector graphics, and Canvas requires that outer vs inner polygons have opposite orientations - it implements only "zero-winding fill". For example, if your outer boundary is clockwise, your holes must be counter-clockwise, islands within holes must be clockwise, and so on. If you need to determine the orientation of a polygon you can use the geometry library's computeSignedArea method ( http://code.google.com/apis/maps/documentation/javascript/reference.html#spherical). You can then traverse your containment tree to ensure that outer vs inner polygons have opposite sign, reversing polygonal loops to negate their sign where necessary. Incidentally the geometry library also has a method to encode polylines/polygons in the same format as you reference, but compiled so it loads faster. So I suggest: use google.maps.Polygon to visualize your polygons, but wrap it in another class or datastructure to represent your containment forest. To visualize simply add the google.maps.Polygon to the map. When constructing queries to your server, consult your wrapper class / datastructure to determine which polygonal loops are outside vs inside. Optionally, also switch to using the compiled poly encoder in the geometry library. Hope that helps Ben On May 12, 2011 9:54 PM, "Richard Quadling" <rquadl...@gmail.com> wrote: -- You received this message because you are subscribed to the Google Groups "Google Maps JavaScript API v3" group. To post to this group, send email to google-maps-js-api-v3@googlegroups.com. To unsubscribe from this group, send email to google-maps-js-api-v3+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-maps-js-api-v3?hl=en.
