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?
regards
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
On Wed, Dec 13, 2000 at 01:11:07PM +0100, m.malicky@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@jps.net>
On 13 Dec 00, at 8:36, Eric G . Miller wrote:
On Wed, Dec 13, 2000 at 01:11:07PM +0100, m.malicky@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@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