OpenStreetMap
I've made my first modest addition to OSM, just to get started.
I notice in the editing window a significant discrepancy between the map detail and the underlying image.
This raises two questions in my mind:
1. Will this affect the accuracy of any GIS data I extract?
2. Should be trying to correct it? If so, how?
Cheers,
Discussion
Comment from SamatJain on 4 December 2010 at 22:36
Are you using Potlatch 2 with Bing's imagery? It's misaligned at low zooms.
Otherwise, if you're editing in the USA, most roads are part of the TIGER data import. Some of the data in certain areas is very, very off, and needs to be aligned/corrected.
Comment from venzen on 5 December 2010 at 09:01
for help on embedding see:
osm.wiki/OpenLayers_Simple_Example
Comment from Ray Mondo on 5 December 2010 at 21:55
Thanks SamatJain, your comment prompted me to explore the option of Potlatch 2 with Bing's imagery. From where I am in Brisbane Australia it actually looks a lot more accurate that Potlatch 1 with Yahoo imagery. Thanks for the feedback.
Comment from Tom Layo on 10 December 2010 at 14:20
Ray,
Feel free to contact me directly with questions. I can help, just as one other user helped me to do this right (I was at first blocked for my mistakes). Since then I've done lots of edits. Things that are obvious to me now were not so clear at my start. Again, I will work with you, just ask.
Best wishes, Sam