[Qgis-user] Problem with adding GeoTIFF raster

[Kieron Dunbar]

On Sun, 11 Apr 2010, Micha Silver wrote:

> Kieron Dunbar wrote:
>
>> I tried to import one of the GeoTIFF rasters from
>> www.ordnancesurvey.gov.uk into QGis, but it seems to ignore the
>> co-ordinates reported by gdalinfo, as it puts the top left corner at
>> 0,0 with a scale of 1 pixel per unit. Is there a way I can put this
>> file in the correct position? I haven't used QGis or GDAL before, so I
>> apologise if I have missed something obvious?
>>
>> The properties gdalinfo reports are as follows (slightly abbreviated):
>>
>> Driver: GTiff/GeoTIFF
>> Files: 1 250 000 Scale Raster/data/HP.tif
>> Size is 4000, 4000
>> Coordinate System is `'
> Here's the problem  ^^^^
>
> After unzipping the downloaded file, if you look in the directory "data"
> there's another directory "georeferencing files". There you'll find the
> *.tfw (world files) for each of the the *tif files. It's strange that
> they are delivered in a separate directory. Just copy all the *.tfw
> files into the same dir as the *.tif files, and they'll be positioned
> correctly.

Thank you for that. I doubt I'd ever have guessed that a second set of
coordinates would make it work when the first failed.

> One additional note: When you load the layers into QGIS, be sure to
> choose the "National Grid" as the CRS. That's EPSG:27700.

Thanks. That saved me a bit of searching.

Kieron Dunbar