I wasn't sure how to adjust the points in real time. They get looked up out of mysql and mapped when someone looks at the page. This is a tiny portion of an application & I don't know what the points will be ahead of time.
You are correct that fixing the points will produce an accurate line. I just didn't know how. On Apr 24, 7:22 pm, "[email protected]" <[email protected]> wrote: > On Apr 23, 11:18 am, Jeff <[email protected]> wrote: > > > I made it work with the polyline made from the waypoints. Which goes > > off the road in some places, but doesn't go off on wild tangents. > > I got this polyline (polyline #0, the red > one):http://www.geocodezip.com/GenericMapBrowser.asp?filename=assetmotion_... > > By adjusting the 2 endpoints to be on the correct side of the road. > The markers are your points, polylinee #1 (the green one) is through > your waypoints. > > -- Larry > > > > > > > > > I was thinking if I got both polylines (one from directions & one > > contructed just from waypoints) and then compared the distance of > > segments between waypoints I might be able to choose the best segment > > for each pair of waypoints and construct a 3rd polyline that is the > > best of both worlds. > > > Of coarse that goes beyond my current understanding of polylines. > > > On Apr 23, 12:50 pm, "[email protected]" <[email protected]> > > wrote: > > > > On Apr 23, 9:00 am, Jeff <[email protected]> wrote: > > > > > Unless either or BOTH endpoints are on the wrong side of the road. I > > > > can't win. Thanks for your help. > > > > But you could potentially use William's test to see if those 2 points > > > are on the correct side of the road or not. > > > > Or maybe the direction of travel (which I think I remember you saying > > > you had) and a the direction of the first segment of the directions > > > polyline. > > > > -- Larry > > > > > On Apr 23, 11:11 am, "[email protected]" <[email protected]> > > > > wrote: > > > > > > On Apr 23, 7:54 am, Jeff <[email protected]> wrote: > > > > > > > Will the created polyline stay on the roads, or be a straight line > > > > > > between points? Also as part of my data set I have the direction of > > > > > > travel as a float from 0-360, can that be of use? > > > > > > It will be a straight line between the points. > > > > > > Probably your best option is to do end to end directions, then use the > > > > > resulting polyline as opposed to trying to do directions between the > > > > > individual points. > > > > > > -- Larry > > > > > > > On Apr 23, 10:36 am, "[email protected]" <[email protected]> > > > > > > wrote: > > > > > > > > On Apr 23, 7:15 am, Jeff <[email protected]> wrote: > > > > > > > > > I think our modems are 'supposed' to be accurate to 5 meters. > > > > > > > > He must > > > > > > > > have been in the passing lane when that particular reading was > > > > > > > > taken. > > > > > > > > > Is there a way to generate a polyline other than using a > > > > > > > > GDirections > > > > > > > > object? > > > > > > > > If you have the points you can create a polyline by passing it an > > > > > > > array of > > > > > > > GLatLngs:http://code.google.com/apis/maps/documentation/reference.html#GPolyli... > > > > > > > > -- Larry > > > > > > > > > On Apr 23, 10:02 am, William <[email protected]> wrote: > > > > > > > > > > On Apr 23, 9:13 pm, Jeff <[email protected]> wrote: > > > > > > > > > > > The waypoints are generated by a gps modem in a vehicle. I > > > > > > > > > > have no way > > > > > > > > > > of changing or correcting them. > > > > > > > > > > It's not very practical but it's possible to use Google Maps > > > > > > > > > API to > > > > > > > > > calculate adjustments so the points are on the correct side > > > > > > > > > of the > > > > > > > > > divided highway. > > > > > > > > > > The data has precision of 4 decimal places (about 10 metres), > > > > > > > > > so its > > > > > > > > > worth moving each point 0.00005 degrees to the North, South, > > > > > > > > > East and > > > > > > > > > West, to see if that reduces the distance to the next > > > > > > > > > waypoint. > > > > > > > > > > The following map shows how it might work, illustrating the > > > > > > > > > points > > > > > > > > > which are the wrong side of the freeway: > > > > > > > > > >http://www.william-map.com/20100423/1/map.htm > > > > > > > > > > ... > > > > > > > > > > -- > > > > > > > > > You received this message because you are subscribed to the > > > > > > > > > Google Groups "Google Maps API" 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 > > > > > > > > > athttp://groups.google.com/group/google-maps-api?hl=en. > > > > > > > > > -- > > > > > > > > You received this message because you are subscribed to the > > > > > > > > Google Groups "Google Maps API" 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 > > > > > > > > athttp://groups.google.com/group/google-maps-api?hl=en.-Hidequotedtext- > > > > > > > > > - Show quoted text - > > > > > > > > -- > > > > > > > You received this message because you are subscribed to the > > > > > > > Google Groups "Google Maps API" 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 > > > > > > > athttp://groups.google.com/group/google-maps-api?hl=en. > > > > > > > -- > > > > > > You received this message because you are subscribed to the Google > > > > > > Groups "Google Maps API" 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 > > > > > > athttp://groups.google.com/group/google-maps-api?hl=en.-Hidequotedtext- > > > > > > > - Show quoted text - > > > > > > -- > > > > > You received this message because you are subscribed to the Google > > > > > Groups "Google Maps API" 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 > > > > > athttp://groups.google.com/group/google-maps-api?hl=en. > > > > > -- > > > > You received this message because you are subscribed to the Google > > > > Groups "Google Maps API" 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 > > > > athttp://groups.google.com/group/google-maps-api?hl=en.-Hidequotedtext - > > > > > - Show quoted text - > > > > -- > > > You received this message because you are subscribed to the Google Groups > > > "Google Maps API" 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 > > > athttp://groups.google.com/group/google-maps-api?hl=en. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google Maps API" 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 > > athttp://groups.google.com/group/google-maps-api?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Google Maps API" 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 > athttp://groups.google.com/group/google-maps-api?hl=en. -- You received this message because you are subscribed to the Google Groups "Google Maps API" group. 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