> But one thing left is that, as you said, the query doesn't update the > difference of two overlapping map extends, how come does the example > acting actually similiar to just updating the difference...@@ ?? Have > you had that feeling...at least I felt it is...haha..
it's always replacing the whole map content. In the yosemite map, some layers are clipped, some are not. In some layers only the overlapping elements (&& operator) are selected. If you load additional data, a getURL call is issued for each dynamic map layer. On data reception, I first delete the old group and then append the new group received by getURL. > Great, I am trying to implement this concept in the following > weeks...I will try your suggestion about the sesssion. By the way, my > own database have not the levels as yours, what would be your guide to > group the data in the difference levels, and how can it be done...?? you can do it in any GIS or directly in the database. Just add a new levels attribute or use existing attributes. In a river network, your major rivers would get a higher level than smaller rivers. Same for the roads network. You can also switch datasets (tables) upon traversing a threshold value. Andreas ----- To unsubscribe send a message to: [EMAIL PROTECTED] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ---- Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/svg-developers/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
