[GRASSLIST:9172] Re: vector map

[andrea pastino]

Maybe i made a silly question : given A and B distance
is sqrt( (xa-xb)^2 + (ya - yb)^2 ) but i wanted to
know if i need any correction parameter. 
i still don't manage to compute distances in grass.
thank you very much and sorry for new mail
Andrea


--- andrea pastino <pennyw81 at yahoo.it> ha scritto: 

> Thank you for help ! I managed to import points with
> v.in.ascii command.
> I've got another question : how can i compute
> distances between the points?
> Given two points with Gauss Boaga coordinates what's
> their distance in km?
> Thank you in advance
> Andrea 
> 
> 
> 
> --- Ian MacMillan <ian_macmillan at umail.ucsb.edu> 
> 
> > Andea, I don't know much about Gauss Boaga, but if
> > it is in a different 
> > projection than your city file (i.e.
> > latitude-longitude vs. utm), then 
> > create a new location that will match the
> buildings
> > data.  From there 
> > you can use v.proj in either location to project
> the
> > data to the other 
> > location.
> > 
> > Hope this helps,
> > Ian
> > 
> > On Nov 17, 2005, at 8:44 AM, andrea pastino wrote:
> > 
> > > Hi, i'm new to Grass and Gis in general. I've
> got
> > a
> > > map of a small city(a dwg file), i've compiled
> > Grass
> > > 6.0 with opendwg support and opened the map.
> I've
> > got
> > > a file with Gauss Boaga coordinates of buildings
> > in
> > > this city and i'd like to import these points in
> > the
> > > map and locate them. What do i have to do ? I
> try
> > > searching manuals and tutorials but i can't
> manage
> > to
> > > solve my problem.
> > > Thank you very much for help
> > > Andrea
> > >
> > >
> > > 	
> > >
> > > 	
> > > 		
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> >  >
> > What happens if a big asteroid hits Earth? Judging
> > from realistic 
> > simulations involving a sledge hammer and a common
> > laboratory frog, we 
> > can assume it will be pretty bad.
> >   - Dave Barry
> > 
> > 
> >
>
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> 
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