> I want a line representing a series of coordinates, yes, the gps log. since > the gps is transmitting every 3 minutes, the possibility of wrong > interpretion of the route is very small..so it would have to do with the > route.
Okay, so you need to write some code that (a) gets coordinates from your XML. (b) As there are limits on how many Directions requests you can make, you will probably want to optimize them by batching them up. You could ask for Directions from A to B , B to C, etc. but that is not very efficient, it will be slow and use up your quota. So better to batch them up so you can ask for Directions A-B-C-D-E and so on. There are a maximum of ten 'places to visit' in a Directions request (start, 8 waypoints, end) so you could batch up in tens. You would need to carry the last point over to also become the first point in the next batch, together with the next nine. (c) Once you've constructed your batches of points, use the first one to form a Directions request. There are limits on the rate that you can request Directions, so best to send one request at a time and wait for the results. If the Directions request was successful, show the polyline on your map and discard the completed batch. (d) If it wasn't successful, examine the error code and either abort the process, or retry the request, depending on the kind of error. (e) Check if there are more batches to process. If so, wait for a delay (so you don't break the rate limit) and back to (c) to send the next request > I'm new with Javascript This is an ambitious project and you are going to have a lot of work, but you will learn a lot about asynchronous functions, callbacks, and task management. Don't forget that you are only guessing where your subject actually goes in the three-minute intervals. Using Directions can have unexpected results over short distances and with GPS position uncertainty ; for example a 10-metre move that appears to cross a street may produce an unexpected diversion to an intersection a km or two away and back, in order to cross the street safely or comply with one-way streets. Be aware of the terms of use, free access to your map may have privacy implications for your subjects, tracking business assets may have licensing implications for you. -- 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.
