[GRASSLIST:4852] Re: transition probability

[Michael Barton]

Radim,

I check the help and it looks like v.distance will to the trick. I'll try it
out. Thanks.

Michael


On 11/16/04 9:13 AM, "Radim Blazek" <blazek at itc.it> wrote:

> Michael Barton wrote:
>> Dylan,
>> 
>> Thanks for summarizing this. I've tried to follow this and more or less see
>> what you did, although I'd actually need to go through it to really
>> understand it.
>> 
>> I've got a similar, but slightly different problem. I will be trying to
>> figure out how to do it, but hope you or someone else out there can suggest
>> a solution. It is a general problem that many people might run into.
>> 
>> I have a lot of CAD maps that are digitizations in MicroCAD (*.dgn) of
>> topographic maps from an area in Spain. When I import them in v.in.ogr, I
>> get the vector shapes I need. However, the attributes that need to be
>> attached to the vectors are actually attached to points that mark where the
>> CAD folks put the label for the vector shape. So, for example, for each
>> topographic line, I have a nice line without an attribute and a point
>> somewhere near the line with the elevation value. The same goes for roads,
>> streams, etc. I can extract each kind of vector shape and each kind of point
>> to separate maps.
>> 
>> I've done this for areas, but these are lines. I suspect that I can
>> associate points with their vector shapes  geographically by giving each
>> point a tiny buffer so that it overlays the associated line. But where do I
>> go from here? If I could get the relevant line cat value into the proper
>> point attribute table, I could reconnect the lines to the attributes, but
>> I'm not quite sure how to do this.
> 
> v.distance
> 
> Radim

______________________________
Michael Barton, Professor of Anthropology
School of Human, Evolution and Social Change
Arizona State University
Tempe, AZ  85287-2402
USA

voice: 480-965-6262; fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton