Hi Simon,
Sorry for the confusion - GeoTiff is a standard for embedding the
georeferencing information within the tif image file. A GeoTiff will
usually contain the CRS information as well. A tfw file is an example of
a world file, not a GeoTiff. It is an alternative approach to conveying
georeferencing information, with the drawback of not also documenting
the CRS of the georeferencing as you say.
Any possibility of sharing the image in question to allow people to
suggest solutions?
Cheers,
Andy
On 11/05/2016 10:07, simonc8 wrote:
Thanks for all the responses.
I've tried the various suggestions but can't get my tiff to import properly
without specifying a projection. Even following the steps suggested in Lee
Hachadoorian's post the tiff imports and appears to show the correct units
in the information bar but when I measure distances using the Measure tool
these are nothing like what they should be.
Incidentally a geotiff doesn't necessarily have any projection information -
if you have a .tif file and an accompanying .tfw file it will merely
register the image using the coordinates specified in the .tfw file with no
information about what these refer to.
--
View this message in context:
http://osgeo-org.1560.x6.nabble.com/QGIS-project-with-no-projection-tp5264924p5265735.html
Sent from the Quantum GIS - User mailing list archive at Nabble.com.
_______________________________________________
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
--
Andy Harfoot
GeoData Institute
University of Southampton
Southampton
SO17 1BJ
Tel: +44 (0)23 8059 2719
Fax: +44 (0)23 8059 2849
www.geodata.soton.ac.uk
_______________________________________________
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: http://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-user
