OpenStreetMap

Much more Odsherred

Posted by Niels Elgaard Larsen on 3 February 2011 in English (English)

Now we have the Fugro maps. What a difference.

I have traced hundreds of roads in the last week.

The Fugro maps are very accurate. Others have found a few problems with the maps, but I have checked the maps againt a few areas that I have mapped many times with GPS with excellent receptions, e.g,
http://www.openstreetmap.org/?lat=55.9447&lon=11.60414&zoom=17&layers=M
And my GPS agrees with Fugro.

It is a big help that we have all address positions on OSM in Denmark. In most cases it is possible to deduct the name of roads, although sometimes it is a puzzle. There are a few cases where precision could be better, e.g. when a road changes name somewhere.

The biggest problem is trees. Odsherred is cottage country and many roads are covered by trees. Sometimes you can still recognize the shape of the road from changes in texture of the trees. But many of the small roads between cottages becomes narrower and less well kept and more overgrown towards the end. So I just guess where the road actually ends.

Another "problem" is that the Fugro maps have boosted the activity in Denmark, which meant that i have experienced some edit conflicts. Now I upload more frequently.

The Fugro Maps are from 2005, A few places the address positions shows that roads must have been build after that. Some places you can see the construction of roads and house, so that you can still put the roads on OSM.

Location: Blålyngvej, Stårup, Odsherred Municipality, Region Zealand, 4500, Denmark

Comment from z-dude on 4 February 2011 at 00:12

Looks nice.
Only Issue I see is a couple of unconnected intersections, but that's a common issue in OSM.

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Comment from Niels Elgaard Larsen on 4 February 2011 at 00:38

I am sure there are some errors.

But sometimes it is also really hard to see if roads are connected.
Even when it looks obvious that they should be connected you can not be sure.
For example much of Odsherred is below sea level, so the road could have a small canal on one side, with roads ending just on the other side of the canal. And often trees grows along canals.

I tend not to connect roads if I am not sure.

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