Hi, I have to say I'm really impressed with mitab.
I'm creating my own map renderer - much like MapX. Primarily I will use Navteq Street data. The problem I have is with large data sets. Currently my application loads an entire layer into ram at the start (e.g. minor roads). This is not a problem for Luxembourg, but when I load the whole of Europe into ram, as you can imagine, things start to become an issue. I know loading all the data at once is not the right thing to do - I only need to load the area that I am currenly displaying. But how? How do I find the ID of the features that should be displayed? I guess I need some sort of geospatial look-up table. How does MapInfo do it - it must load from the file dynamically as you pan. Is this possible with mitab - or would I need to create my own special look- up table? Any help would be appreciated. Kind regards Tim ------------------------ Yahoo! Groups Sponsor --------------------~--> Get to your groups with one click. Know instantly when new email arrives http://us.click.yahoo.com/.7bhrC/MGxNAA/yQLSAA/dkFolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/mitab/ <*> 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/
