robdb wrote:I know this isn't a recent thread, but I was just looking around and thought I would also point out that depending on the altitude that the photo was taken from (e.g. typical plane altitude versus satellite photo) we could also be seeing the effect of drawing a spherical map on a flat surface - this process is called a Mercator Projection and effects most maps we use today.

Unless you work for a government agency, it's unlikely you have satellite imagery down to road-level resolution.

All of the aerials which have good detail will be from planes, which still have to be corrected, but are much closer than satellites.

Thank you

I'm not sure what the Administration Recommended Way would be, but I would think going into the map editor and adjusting them manually would be faster than re-driving the roads. Besides, even after you drive the roads, it is best to go into the editor and 'fix' the new roads. So since you have to go to the editor anyways, save yourself some gas and just do it all there.

I know this isn't a recent thread, but I was just looking around and thought I would also point out that depending on the altitude that the photo was taken from (e.g. typical plane altitude versus satellite photo) we could also be seeing the effect of drawing a spherical map on a flat surface - this process is called a Mercator Projection and effects most maps we use today.

What you are seeing is something called "parallax error" http://en.wikipedia.org/wiki/Parallax_error due to the angle the photograph is taken from. You have to remember that the aerial photos cover quite a large area in one shot. The things farthest from the center of the image will get a bigger parallax error than the center does.

That is why you can see roads slightly out of alignment even on Google Maps. They (TeleAtlas) know about this.

So you should only use the aerials as reference.

Ok, slightly off topic, but mostly on for this thread regarding shift on the photographs. I too am a recently appointed area manager and last night I found an area (about 3 neighborhoods) that is shifted incredibly on the maps compared to the aerial photos. I drove through it with the GPS on and all the streets are off by a large enough amount that waze has no idea what street I'm actually on and keeps hopping all over the place changing directions.

Is the recommended solution for this to try and move all of the existing streets using the update maps page so they line up correctly with the area or would it be better to blow them away in the map and then go through and remap them using gps from waze mobile to create the streets?

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Jeff