If you are in UK (as your email suggests), you are more than welcome to join a free QGIS workshop we are holding in July:
http://www.faunalia.co.uk/en/courses/beginning Regards Saber On Sun, 2011-06-05 at 14:23 +0200, DB wrote: > On 05/16/2011 06:01 PM, [email protected] wrote: > > 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 > > >> Hello Dave, > > > > I believe that QGIS is in fact the right tool for you to use. > > > > In a normal case you would need to load both .map file in QGIS. Then > > using the georeferencer plugin, load the JPG and start giving known > > coordinates (the ozi file points, using the "From map canvas tool") > > to places on your image. After at you will be able to georeference > > the imagem and load it in QGIS. > > > > With a bit of luck, all the points in your ozi file are in the same > > coordinate system (It would be very strange if it didn't...), > > probably WGS84 geographic coordinates and you don't need to worry at > > all. > > Hope I have helped. > > > > Alexandre Neto > > > > --- On *Tue, 5/17/11, DB /<[email protected]>/* wrote: > > > > > > From: DB <[email protected]> Subject: [Qgis-user] New starter on > > QGIS & I need help!!!!! To: [email protected] 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? > > > > Hi Brent & Alexandre, > > Thanks for your help.... B u t.. after a lot of playing with qgis & > Georeferencer, I'm still stuck! > > I guess there must be a clarification hidden in a document "Somewhere > over the rainbow", but I have to confess, I can't find it - usual > problem of an otsider coming in & expecting everything to work > automatically, RTFM only to be done as a last step! > > OK... so I started Georef, saw how the information got put out & made a > file containing the 9 UTM cross points as given in Ozi's .map file. > Restarted, danced 3 times round the maypole & eventually got my 9 points > to plot on the Georef mini-map & the QGIS big map - yippee! and in the > right places!! BUT I don't > seem to be able to tell anything what these 9 points represent. > > In Ozi .map, I have > > point01,xy,2412, 2380,in,deg, , ,N, , , W,grid,31,704000,5552000,N > point02..... etc. In Georef all I appear to be able to input is > 2411.496,-2379.907 under SrcX & Y, which turns into > > mapX,mapY,pixelX,pixelY,enable > 2412.000000000000000,-2380.000000000000000,2412.909978693178800,-2382.054865056816197,1 > in the GCP "points" file > Nowhere for the UTM 31 N 704000 5552000. > > If I double click on any of the boxes in the table, I get sent of to a > transformation panel which might as well be written in hieroglyphs for > all I understand of it! > > I selected > Transformation Type: Linear > Resampling method: Linear > Output raster: /home/Dave/Desktop/Luxgsm/map/trial_01 > Target SRS: EPSG:32631 > Set Target Resolution: on > Horizontal: 1.00000 > Vertical: -1.00000 > Load in QGIS when done: on > > With this I get on the Georef window bottom panel: > Transform: Linear Translation (-0.326581, 0.800639) Scale (1.00004, > 1.00008) Rotation: 0 Mean error 0.717116, followed by the current mouse > coordinates. > > I guess (!) I'm quite a long way into my trial, but, like Hansel & > Gretel, I can't see wood for trees!!! I've tried the qgis "easy > guide", but it doesn't appear to go where I want; I tried the Georef > help.... At least I now know that a GCP is a Ground Control Point! > > So, my plaintive voice in the wilderness(!!), can someone either give me > a cook-book sequence of How-tos to make Qgis recognise my UTM grid(s) or > point me to a Beginners Guide somewhere in I'net space???? > > BTW, I have to deal with 2 UTM bands 31N & 32N. > > Many, many thanks for any help > > Dave > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
