<p dir="ltr"><br>
On 22 Feb 2016 4:54 AM, "Bo Victor Thomsen" <<a href="mailto:bo.victor.thomsen@gmail.com">bo.victor.thomsen@gmail.com</a>> wrote:<br>
><br>
> Hi David -<br>
><br>
> Now with QGIS upgraded to use GDAL 2.0.2 it has the necessary building blocks to read "the slightly dodgy" tif-with-tab files** (My own words IIRC ? ). The only thing I can't figure out it how to activate the "TAB_APPROX_GEOTRANSFORM" qualifier.<br>
><br>
> Maybe some of the experienced users/developers could tell us how ?<br>
><br>
> If it not already possible to activate this fuction, I see some possibilities for this to happen:<br>
> It could permanently be activated in QGIS. (It would only affect the users with tiff - files witout geo information embedded in the tiff; with corresponding tab files and where the tab files contains "slightly dodgy" information. That must be a smallish amount of users.<br>
> It could be activated by a new user setting for QGIS. </p>
<p dir="ltr">Is there an open bug report about this? (Preferably with test data available)</p>
<p dir="ltr">Nyall</p>
<p dir="ltr">><br>
><br>
> Regards<br>
> Bo Victor Thomsen<br>
><br>
> ** The phrase "slightly dodgy tif-with-tab" files implies, that: <br>
> the tiff file does not contain any geoinformation.<br>
> It has a corresponding tab file, which contains the geoinformation.<br>
> And lastly: This information contains som smallish error when calculating the affine transformation from pixels to world coordinates, probably because the 4 (or more) pixel point/world coordinate pairs has been generated by hand. <br>
> In this case GDAL will make a least squares adjustment from the possible solutions - if the "TAB_APPROX_GEOTRANSFORM" is activated. Otherwise it simply produces an error.<br>
><br>
><br>
> Den 21/02/16 kl. 12:35 skrev David Addy:<br>
>><br>
>> This is good news indeed for all UK local authorities who use MapInfo. Will<br>
>> we now be able to use the extra commands of “TAB_APPROX_GEOTRANSFORM YES”<br>
>> for all those slightly dodgy tab with tiff files created over the years?<br>
>> Although we can use QGIS to convert these into Geotiffs, it is much more<br>
>> user friendly to be able to read existing MapInfo tiffs with tabs without<br>
>> such a need for a conversion.<br>
>> Bo Victor put in an enhancement request for this feature a year ago.<br>
>><br>
>><br>
>><br>
>> --<br>
>> View this message in context: <a href="http://osgeo-org.1560.x6.nabble.com/GDAL-OGR-2-0-in-OSGeo4W-tp5251832p5251887.html">http://osgeo-org.1560.x6.nabble.com/GDAL-OGR-2-0-in-OSGeo4W-tp5251832p5251887.html</a><br>
>> Sent from the Quantum GIS - User mailing list archive at Nabble.com.<br>
>> _______________________________________________<br>
>> Qgis-user mailing list<br>
>> <a href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a><br>
>> List info: <a href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
>> Unsubscribe: <a href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
><br>
><br>
><br>
> _______________________________________________<br>
> Qgis-user mailing list<br>
> <a href="mailto:Qgis-user@lists.osgeo.org">Qgis-user@lists.osgeo.org</a><br>
> List info: <a href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
> Unsubscribe: <a href="http://lists.osgeo.org/mailman/listinfo/qgis-user">http://lists.osgeo.org/mailman/listinfo/qgis-user</a><br>
</p>