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<div class="moz-cite-prefix">Hi Simon,<br>
<br>
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.<br>
<br>
Any possibility of sharing the image in question to allow people
to suggest solutions?<br>
<br>
Cheers,<br>
<br>
Andy<br>
<br>
On 11/05/2016 10:07, simonc8 wrote:<br>
</div>
<blockquote cite="mid:1462957631046-5265735.post@n6.nabble.com"
type="cite">
<pre wrap="">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.
--
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</blockquote>
<br>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
Andy Harfoot
GeoData Institute
University of Southampton
Southampton
SO17 1BJ
Tel: +44 (0)23 8059 2719
Fax: +44 (0)23 8059 2849
<a class="moz-txt-link-abbreviated" href="http://www.geodata.soton.ac.uk">www.geodata.soton.ac.uk</a>
</pre>
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