Hi Brent,
thanks for your advice. I will try both, (a) manipulating and using the
world file of the image I am saving outside the map composer and (b) the
geo-referencing of the maps with the geo-ref. tools in QGIS.
Since I am producing a series of 4-6 different thematic maps on each
area of interest, I was hoping to find a more efficient way to
geo-reference the maps, but on the other hand, because the maps series
is always using the identical map template, a commonly used world file
might be a feasible way to solve the problem .....
I´ll find it out.
Regards,
Markus
--
Dr. Markus Weidenbach
*landConsult.de*
Geographical Information Management
and Environmental Planning
D-77773 Schenkenzell
Germany
e.mail see: http://landConsult.de
Am 13.08.2011 23:54, schrieb [email protected]:
Hi Markus,
If you choose "File -> Save as Image", then save as a PNG, for
example, the on screen image is saved, along with the world file
allowing it to be reused.
Note that the file suffix pngw will be used, not wld or pgw for the
world file.
However, I'm not aware of this being directly supported from the map
composer, but there are a couple of ways of doing this that might work
for you.
You could use the georeferencing tool to generate a world file from a
saved map composer image, but this can be a bit fiddly, although a
useful exercise for students in its own right..
You could also use an image processing tool to convert a composer
image to the same pixel geometry as a saved map window, in which case
the world file would also apply to it, or perhaps double the x & y
pixel counts (for better resolution) and halve the pixel offset values
in the world file. For this to work you'd need to have all the map
composer elements overlaying the actual map (if this is possible),
rather than outside the map, and therefore extending the apparent
image extent.
Cheers
Brent Wood
--- On *Sun, 8/14/11, Markus Weidenbach /<[email protected]>/* wrote:
From: Markus Weidenbach <[email protected]>
Subject: [Qgis-user] World File for map compositions
To: [email protected]
Date: Sunday, August 14, 2011, 6:57 AM
Dear list,
is there a way to save a world file together with an image of a
completely designed map in the map composer?
The idea is to provide less experienced GIS users with a
geo-referenced raster image (or pdf) of a complex map composition
including an explaining legend, scale bar, north arrow and
pre-defined layers in a specific order and layout. Such an image
could easily be used by GIS beginners to visualize complex
thematic issues and even add further layers or do some area/length
measurements.
Any hints and ideas how this could be managed are welcome.
Regards,
Markus
--
Dr. Markus Weidenbach
*landConsult.de*
Geographical Information Management
and Environmental Planning
D-77773 Schenkenzell
Germany
e.mail see: http://landConsult.de
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