Some Topo 4M Maps not aligned

[DougK]

Who is the responsible party/fixer?  Anyone?
Four maps meet here.
34.12439° N
119.00113° W

The two maps to the West are off.  You can easily see Wood Canyon getting a tectonic shift.  My GPS tracks agree with the maps to the East.

[ScottMorris]

Terraserver @ http://terraserver-usa.com is responsible for the maps and definitely that error.

Bummer that there's another shift.  Have you tried the "Correct Map offset" function (under the Window menu)?  If you figure out the correct offset for that area, I'd love to add it to the drop down for other's convenience.

Thanks.

[DougK]

Quote (ScottMorris @ Jan. 22 2009,12:11)

Terraserver @ http://terraserver-usa.com is responsible for the maps and definitely that error. Bummer that there's another shift.  Have you tried the "Correct Map offset" function (under the Window menu)?  If you figure out the correct offset for that area, I'd love to add it to the drop down for other's convenience. Thanks.

Unfortunately Correct Map Offset changes all maps.  
LOOK HERE

Wood Canyon is displaced 800M between the upper and lower maps. (and more errors)

[ScottMorris]

You can set it to only change the offset for 4 meter topo, not all maps.

But, yes, you can't define an area and have it restitch the maps.  That would be quite an involved piece of coding.

Best we can do is already there.  None of the other Terraserver viewing applications even have the nudge ability.  You just have to turn if on and off when you are in / outside the area that needs correcting.  If you have a track that crosses... bummer!

I deal with one daily here by Tucson.  My closest trail system crosses the glitch, but I just turn on the offset when I'm over there (and yes, my tracks do cross if I ride from home).

[DougK]

To make my tracks align on the maps I am using User Maps (screens shots from another program).
To align I pick a calibration point on the user map and in the base view I pick a corresponding point in a GPX track.  I ignore the basemap (4M topo) since it will never match the true GPS.

It would simplify things if calibration were a matter of telling/pointing TF where on the User Map a waypoint coresponds.

PS How can one "nudge" the calibration without redoing the work?

[ScottMorris]

You can more or less tell TF where on a User Map a waypoint is.  You just have to click on the user map first, then click *on the waypoint* in the TF display.

You can nudge the calibration by clicking on the green cross that's in the middle of the map.  That will move it around.  You can also grab the calibration points, or the corners depending if you're using 2 or 3 point calibration.

[DougK]

I made the mistake of touching "Calibrate Point X" which reset the whole setup.

Small problem: if I bring up the UML Window (^U) the base map switches to 1M Urban.

[ScottMorris]

I made the mistake of touching "Calibrate Point X" which reset the whole setup.

Small problem: if I bring up the UML Window (^U) the base map switches to 1M Urban.

You can cancel calibration of any of the points by pushing the button again (text of the button changes to "Cancel Calibration"), so if you hit it by mistake again, no sweat.

Good point on the CTRL-U assignment!  I'll fix that.  Thanks.