[Qgis-user] Re: Help: GPS data not showing in correct position

[Saber Razmjooei]

1- You need tfw for ST but you have included SU. Once you got that
sorted, you need to ensure the CRS for the raster is set to the British
National Grid (EPSG:27700). To do that, right-click on the layer,
Properties, General tab and set the CRS to EPSG:27700

2- Set the canvas CRS to BNG (EPSG:27700) by going to (from the main
menu) Settings > Project Properties ... CRS tab

3- When you add your GPS, select Lat as X field and Long as Y field.
Please note that as default it's the other way round in the dialogue
box.

4- Ensure the GPS layer loaded as WGS84 (EPSG: 4326)

5- Turn on the OTF and it should work.


Cheers
Saber
_________________
Saber Razmjooei 
Lutra Consulting
www.lutraconsulting.co.uk

-----Original Message-----
From: Albin Blaschka <albin.blaschka at standortsanalyse.net>
Reply-to: albin.blaschka at standortsanalyse.net
To: qgis-user at lists.osgeo.org
Subject: [Qgis-user] Re: Help: GPS data not showing in correct position
Date: Sat, 05 May 2012 08:20:18 +0200

Am 2012-05-05 00:04, schrieb Ian kirk-ellis:
> All , yes Ive tried the "on the fly" setting but to no avail. I attch a link where I have uploaded the points, the mapping I am using and a google map plot the coords (which is right!). Any bright ideas please advise, I have some other data from another source where I have a similar problem. Please help :-)
>

Hello,

as far as I can tell from your data, your rasterfile has a problem with 
its projection: The associated .tfw file you put online had the wrong 
name (the raster is named ST.tif, therefore the .tfw - file has to be 
named ST.tfw).

So two questions to dig further:
Is it the right .tfw file for that raster?

And in which projection is the raster - in the .tfw file are just 
numbers, from which it is hard to guess for me, to which coordinate 
system they belong to... (UTM or a national grid...)

Maybe for a little background, a look on wikipedia...
http://en.wikipedia.org/wiki/Map_projection

HTH,
Albin