On May 22, 10:49 pm, ccrum <cameron.c...@gmail.com> wrote: > I recently noticed that the polyline returned in each step in a route > does not always start and end with the coordinates the step says it > does. For Instance, I ran a directions query from Fort Worth, TX to > Austin, TX. The start and end points returned were: > > 32.72468 -97.32085 and 32.04823 -97.09488 > and it's html was "Take the ramp on the <b>left</b> onto <b>I-35W S</ > b>"
A link to a map would be better. I get this: http://www.geocodezip.com/v3_GoogleEx_directions-draggable2Xml.html?addr1=Fort%20Worth,%20TX&addr2=Austin,%20TX The first point of the polyline returned for me is: <point lat='32.725410' lng='-97.320840' /> > > The start point of the polyline was indeed 32.72468 -97.32085 but the > last point of the polyline was 32.48797,-97.54039. The last point of the polyline I get is: <point lat='30.267100' lng='-97.743080' /> > The polyline also > contained 603 points. This is a dramatic difference in location > between what the path reports and the polyline shows. Furthermore, > Step 3 started with the declared end point of Step 2 (32.04823 > -97.09488) and continued on. There were breaks like this in other > steps as well. Step 3 had the following start and end coordinates > listed in the step: > > 32.04823 -97.09488 and 31.04757 -97.46572 > > and once again the Step 3 polyline started with the same coordinates > (32.04823 -97.09488), but ended dramatically different with > 31.21956,-97.61789 as the last point of the polyline. Step 4 was also > off, but steps 5,6,7, and 8 had matching step coordinates and polyline > start and end coordinates. The latter steps were also much shorter > containing only a few sets of coordinates whil3 2,3 and 4 had several > hundred coordinates each. > > So, does anyone have any idea why this is happening? If I try to plot > the lines on a map abased on the polyline coordinates, I get several > disjointed lines and they are definitely not the route from Fort Worth > to Austin unless Google is assuming we can teleport along the path. I > need the actual polylines as I am trying to determine total miles > traveled per state and can do an intersect query in SQL spatial > against a set of state polygons to determine which step subsections > are in which states. If the polylines "wander" like this, I won't be > able to use them. What polyline are you looking at? The simplified summary polyline (overview_path) or the polylines in the steps (path)? -- Larry > > Regards, > > Cameron -- 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 google-maps-js-api-v3@googlegroups.com. To unsubscribe from this group, send email to google-maps-js-api-v3+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-maps-js-api-v3?hl=en.
