[OSM-legal-talk] Non-existant streets
emilie.laffray at gmail.com
Wed Aug 12 11:33:13 BST 2009
2009/8/12 Elizabeth Dodd <edodd at billiau.net>
> can i express this problem more clearly
> we are a very small number of mappers covering a very large area.
> most proprietary maps contain lines drawn randomly across the map claiming
> be roads.
> when planning a route between two towns
> we study the proprietary maps, study OSM and pick a route to cover roads
> yet mapped - or just traced off landsat
> so it is really very annoying to be looking for a road which doesn't exist
> except on paper. the road reserve may exist but it could be completely
> overgrown with trees, or be impassable with natural features - a cliff, a
> water feature
> and its even more annoying to be caught the next time.
> we are considering marking roads as impassable, having a "barrier" to their
> use or similar markers which may not ever be rendered but would mark the
> problem in the database
Ok, I understand your point. However, I am not sure that there is any way to
detect if a road exists or not unless you are going there. You would need a
list of existing roads but then we are back to the original point that the
data came from a proprietary solution hence the reason why you end up in a
I am not sure what would be best. I see why you are looking at those maps to
optimize your time to get the mapping done. I can't tell you to ask local
people as I am sure in most cases, there won't be any. I understand your
request even more since I looked quite extensively at Australia data some
time ago. Landsat is not good enough.
Maybe using STRM data (or the new elevation data) might give you some clues
about cliff and other features. In addition, while the data from your
governement is copyrighted, you have access to an enormous amount of data
about natural features (I have seen a huge amount of shapefile if I remember
correctly). You may want to look at those to infer what roads could be
potentially wrong or not. But I am not sure that approach is what we want to
do with OSM.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the legal-talk