On Feb 21, 1:23 am, Chris Apolzon <[email protected]> wrote: > Looks pretty good. Any chance you could put a demo together that loads all > those vertices at once?
First, let me apologize for posting an inaccurate vertex count. The actual number is 320,000. The 3.2 million record count applies to the number of BTS (Bureau of Transportation Statistics) records examined, not the number actually captured. A lot of lesser highways were rejected. The resulting 49 files are 2.4 million bytes in total. I believe it is too large for a single demo. However, you can click all 48 states plus DC in rapid succession without waiting for intermediate results. Each file loads asynchronously. In their present state, the files are rather inefficient. The BTS derrives its highway shape files from the Census Department's TIGER shape files. The TIGER shapes files consist of a lot of short segments in arbitrary order. The compression facility is deprived of long series of consecutive points to compress. I am planning to link the short segments together to build long segments. It will improve the efficiency of the definition files. I will also aggregate some of the small states. The New England states (ME, NH, VT, MA, RI, CT) might be grouped together in the same file. DC could be grouped with (MD, DE, NJ) plus perhaps (VA & WV). I will shoot for about 20 files of about 100K each. Texas by itself is already 185K. -- 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.
