[GRASSLIST:1270] Re: TIFF Question

[m.malicky at landesmuseum-linz.ac.at]

On 13 Dec 00, at 8:36, Eric G . Miller wrote:

> On Wed, Dec 13, 2000 at 01:11:07PM +0100, m.malicky at landesmuseum-linz.ac.at wrote:
> > Hi all!
> > 
> > I have the following question/problem!
> > 
> > I have a vector data layer in tmerc form, with 1m units and a tiff 
> > picture where I know the correct offset within the tmerc, with a pixle 
> > size corresponding 50m x 50m. How can I put this two layers 
> > together?
> 
> You can import the tiff into an x-y location and use i.vpoints to
> specify tie points for one of the i.rectify commands.
> 
> Or, if you know the coordinates of the center of the upper left pixel
> for the tiff, and its horizontal and vertical scale factors (50 x 50 ?),
> you can create a TIFF World file which the r.in.tiff in beta10 (or
> r.in.arctiff in earlier versions) should be able to use to place the
> image correctly.
> 
> <image>.tfw:
> X-Scale           // 50.00000000
> X-Shift           //  0.00000000
> Y-Shift           //  0.00000000
> Y-Scale           // -50.0000000  -- Note the negative!
> X-Origin          // Easting of center of pixel (0,0)
> Y-Origin          // Northing of center of pixel (0,0)
> 
> -- 
> Eric G. Miller <egm2 at jps.net>
> 

many thank for the hint,

kind regards

Mike
DI Michael Malicky
System Administrator ZOBODAT
Biologiezentrum des OOE Landesmuseums
Johann Wilhelm Klein Str. 73
A-4040 Linz
Oesterreich
Tel.: +43/732/759733/33
Fax.: +43/732/759733/99