> I have list of points to draw polygon. > By using this much input > how to use tile overlay? > how to get tile url? > Please explain in detail.I didn't understand this tile overlay > concept clearly.
The 'easy' way to draw your polygons is what you tried ; creating them as overlays using the API. The price of 'easy' is 'slow' with that many polygons. It's slow because there is great deal of processing at the browser/client end to draw and re-draw the overlays. Because you are unable or unwilling to reduce the number of polygons, you have to adopt a completely different approach. The tile overlay approach comes in two parts. It is not easy!! The client end is changed to use a tile overlay, so instead of fetching lots of data and drawing thousands of polygons, it just gets a small number of map image tiles. You set it up to ask for the tiles from your own server. Much of work to be done in drawing polygons is done at the server end. That's where you process your list of points and create images of lots of polygons on one image tile. The conetents of each tile will depend on the area and zoom factor of course. So, at the server you need an image creation script that responds to tile request from the browser ... or if your data never changes you could perhaps pre- process and prepare the tile images in advance. If you need the polygons to be clickable or suchlike, it can still be done but it is still more work. cheers, Ross K --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Maps API" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Maps-API?hl=en -~----------~----~----~----~------~----~------~--~---
