On Oct 18, 10:39 pm, john <[email protected]> wrote: > Chad, > > I can't even get the kml file working properly. > > http://209.35.190.130/kmltest/sg.html > > It only show one boundary while I have many polygons in the file.
Google Maps doesn't like your kml (I'm not sure why, but it must be expecting more complex kml, yours is probably missing something that it expects). geoxml3 seems to show all the pieces: http://www.geocodezip.com/geoxml3_test/kmltest_SG_sidebar.html (for whatever that is worth, there doesn't seem to be any data associated with the polygons) -- Larry > Cannot preserve the viewport. > Cannot supress the infowindow. > > Can you take a look to see what is wrong? > > Thanks. > > John > > On Oct 18, 2:39 pm, Chad Killingsworth > > > > <[email protected]> wrote: > > Kml Layers will give you a HUGE improvement. Google's servers actually > > process your kml files and send the client a single set of image tiles > > - exactly what you were after. Let them do the heavy lifting. > > > Chad Killingsworth > > > On Oct 18, 12:28 pm, john <[email protected]> wrote: > > > > I don't see KML layers will offer much performance improvement. But I > > > will give it a try. > > > > I know how the coord system works. But that's the first step to create > > > tiles. That why I am asking if there existing tools or service that I > > > can use (instead build my own). > > > > On Oct 18, 9:09 am, Martin <[email protected]> wrote: > > > > >http://code.google.com/apis/maps/documentation/javascript/maptypes.ht... > > > > > Martin. > > > > > On 18 Oct, 14:14, john <[email protected]> wrote: > > > > > > I have polygons that has huge number of points. One of the polygon was > > > > > over 300,000 points originally. It is still huge after we smoothed it. > > > > > > In v2, I uses FromEncoded(). The performance is bad but at least it > > > > > shows on the map. I understand that the polygon drawing is improved in > > > > > v3. But with some many points, I don't feel it will do too much. > > > > > > I think the best solution is to use tiles. Even there are lots of > > > > > tiles at deep levels. But most will be blank. Following is what's in > > > > > my mind. > > > > > > Create database table with key on (zoom, x, y) and an image column > > > > > store the images (or a reference to a image file). > > > > > > for each tile in my country (zoom, x, y) // how to get the coords? > > > > > { > > > > > for each (polygon that intersects the tile) > > > > > draw the polygon on the tile. > > > > > > save the tile and remember it is database. > > > > > > } > > > > > > When request for (zoom, x, y), I simply search the database, return > > > > > the image if finds one. > > > > > > The idea is simple and I believe it can be done. My questions are: > > > > > > Is there any service/tool that can do what I described. I see tile > > > > > cutting tools but all take an image as input which will lost details > > > > > when doom in.Also, I don't want all those blank images. -- 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 [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-js-api-v3?hl=en.
