[GRASSLIST:1643] Re: display several maps

[Gail Higginbottom]

> Hi Gail
> 
> I'm sorry, but I have to disagree. We just used r.patch several weeks
> ago to do just what Julien wants. We had several individual raster maps
> (actually orthophotos) of an area and we used r.patch to create a single
> map of the entire area. 
> 
> Also, from the r.patch manual page we have the following from the
> "Notes" section.
> 
> "Frequently, this program is used to patch together adjacent map layers"
> 
> So it appears that r.patch can be used for creating one large map from
> several "sub-maps" of an entire region.
> 

Thankyou Justin, that is great news. Sounds simpler than I imagined. 
I am about to launch into creating a large map
made up of 164 separate OS DTM (NTF format) maps, 20km by 20km each.
However, I am using
vector data, do you have any knowledge of doing the same thing with vector
data? I am going to try v.patch. Having now read the pages for
patching vectors, do you have any advice that may not have been covered in
the Grass webpage that experience may have passed on to you?

with best wishes,
Gail.


> Gail Higginbottom wrote:
> > 
> >  r.patch is used to  to make a composite map layer from several map 
> > layers which are "registered to the same area of the Earth's
> > surface".  So I dont think it will help Julien. I think JUlien is
> > looking for something that creates one large map from several
> > "sub-maps" of an entire region .
> 
> -- 
> Sincerely,
> 
> Jazzman (a.k.a. Justin Hickey)  e-mail: jhickey at hpcc.nectec.or.th
> High Performance Computing Center
> National Electronics and Computer Technology Center (NECTEC)
> Bangkok, Thailand
> ==================================================================
> People who think they know everything are very irritating to those
> of us who do.  ---Anonymous
> 
> Jazz and Trek Rule!!!
> ==================================================================
>