[Qgis-user] New starter on QGIS & I need help!!!!!

[pcreso at pcreso.com]

Click plugins, manage plugins then locate and enable Georeferencer (you may need to download Python plugins first)

Use this tool to click on points on the map, & specify/enter the UTM coordinates for these points.

Do this for several points scattered throughout the image. Once done (accurately!) QGIS will correctly locate the image on the map, and therefore properly place any points or lines overlaid on it.

This is not the only way, but is perhaps the simplest.


HTH,

  Brent Wood

--- On Tue, 5/17/11, DB <Freddog_de at yahoo.co.uk> wrote:

From: DB <Freddog_de at yahoo.co.uk>
Subject: [Qgis-user] New starter on QGIS & I need help!!!!!
To: qgis-user at lists.osgeo.org
Date: Tuesday, May 17, 2011, 2:12 AM

Hi all,

I've just loaded Qgis under Fedora 14 to try and do some of the things that happen in Oziexplorer.  (I'm an official at a number of Hot Air Balloon competitions where Ozi is currently used for evaluating GPS tracks)

I've managed to get our (next)competition map loaded into qgis, but haven't yet found a way to fix the scale of the map.  It is a 50000  map which has been scanned to jpeg.  We also have an ozi .map file which would appear to my pretty much untrained eye to be the info which identifies the UTM coordinate system in use on the map.

My first question to you guys is... how do I tell qgis to convert the pixel(?) counts to UTM grid?

Assuming we can do that... does Qgis take account of two UTM bands meeting in the middle of our map?

And then.. if I try to measure a distance on the map (which crosses over the UTM bands), will the distance be correctly-ish returned in metres? & I guess a follow up to that is, OK, I recognise that if I mak my line with the mouse, it should be ok; but if i enter UTM coordinates, will the distance between the points be correct?

I suppose really, my first question ought to be - is Qgis the right program for what I want to try to do or is there something else in the Linux box which would be more appropriate???

Many thanks to all who have produced Qgis, it seems to be a marvellous piece of software (if only I understood all that it was about!)

Dave
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