[Talk-ca] Cleaning up after the GeoBase import

Michael Barabanov michael.barabanov at gmail.com
Wed Jun 17 22:29:26 BST 2009


(Sorry for repeating myself) it's not only splitting; larger
streets and highways consist of a way for each direction in GeoBase.
This is also the recommended way to map those in OSM (see for example
http://josm.openstreetmap.de/wiki/Introduction, Conventions), but often
they are not, at least in the areas I've looked into.
This additional complication has to be taken into account while
automating the process.

Michael.

On Wed, Jun 17, 2009 at 04:31:06PM -0400, Richard Degelder (rtdegelder at gmail.com) wrote:
> On Wed, Jun 17, 2009 at 2:02 PM, SteveC <steve at asklater.com> wrote:
> 
> >
> > On 12 Jun 2009, at 18:54, Richard Degelder wrote:
> >
> >  William Lachance wrote:
> >>
> >> Look at this from another angle: Should we split up all the existing OSM
> >> road data that people have put in to add in GeoBase UUID information?
> >> The simple answer is that at some point we are going to have to.
> >>
> >> If we want to add the attributes available from GeoBase, and to be able to
> >> update it from future GeoBase updates, then we are going to have to find a
> >> way to add the GeoBase UUID information and,
> >>
> >
> > Stupid question but my understanding is that TIGER claims to reuse UIDs
> > from release to release but doesn't really. So, what is the probability with
> > GeoBase? Just saying it might be worth thinking about before doing all the
> > work.
> >
> 
> I may not be the best person to answer the question, I can easily think of a
> few others that would be better qualified, but it is my understanding that
> the GeoBase UUIDs, the NIDs, are persistent and the primary means of
> identifying a segment or item.  Currently we are importing the new data from
> GeoBase and leaving the current user input data alone but if we want to take
> advantage of the extra data that comes from GeoBase we are going to have to
> find a way to split the current ways to add the data, such as the GeoBase
> NIDs and street names, at some point.
> 
> I am hoping that we can do so in a manner that will not require users to
> manually do the splitting but that a script can be written to do most of the
> work for us.  There are probably going to be points where we are going to
> have to look at the data and make corrections but they should, very
> hopefully, be infrequent.  Once the ways are split we can use other tools,
> possibly RoadMatcher, to transfer data from GeoBase to OSM to fill out the
> map even more.
> 
> Steve Singer, the person who is doing most of the work with the import of
> the GeoBase data, pointed out recently that there were new updates for areas
> that he had already imported the data and so we have the oppertunity to
> really test the ability to update OSM from a GeoBase update.
> 
> 
> 
> > Best
> >
> > Steve
> >
> > Richard Degelder

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