Thank you very much for the software and the instructions. I was able to download an aerial photograph from the USGS at 0.15mpp and get it to work. I had tried it before, but I wasn't aware of the zoom level issue. I did use the world file that the USGS supplied. (After I remember to change my location to match the image location. Duh. Thanks for the nice option to go to the center of the map)
For what it's worth, these images look like the same images that google maps is using in the US (my first hint was the copyright notice on the google-maps site). Tim On 09/21/2009 02:41 PM, Evan Battaglia wrote: > Yes, I know it needs a lot of work, but it does kind of work > sometimes. Thing is, I could never get scanned maps to match up all > that well; we may need support for more projections (like plain > lat/lon plotting). But anyway, the parameters are as follows: > X (easting) scale mpp: the scale of the map in the X direction. "mpp" > stands for meters per pixel, but this is only in units of meters per > pixel in UTM mode, otherwise it is Viking's "zoom factor" units, which > are related to the size of Google Maps / OpenStreetMap tiles. The map > will only show if we are zoomed to this zoom level. > > Y (easting) scale mpp: the scale of the map in the Y direction. Again, > the layer will only draw if we are at this zoom level in the Y > direction. (the two numbers i.e. '4.000/4.000' show the zoom level; > goto View->Zoom To to change it) > > Corner pixel easting: the UTM "easting" value of the upper-right > corner pixel of the map. (try going to View->Go to UTM... to see your > current location in UTM). Note that the map is drawn in any UTM zone. > > Corner pixel northing: the UTM "easting" value of the upper-right > corner pixel of the map. > > These four parameters are actually somewhat of a standard in > Georeferencing maps, at least it's one common way the parameters are > given. > > There are two tools to help fit a map. First get the map to show on > the screen (for instance by putting your current location in UTM and > current zoomfactor in for the above parameters). > > Georef Move Map: drag and drop to move the map around the screen > Georef Zoom Tool: change the Viking zoom factor AND the zoom factor > for the georef map; this has the effect of changing the size of > everything else but the map. This is useful for trying to fit a map to > a track or another map (to forse another map to scale at that zoom > level, set the "Zoom Level" setting in MapLayer's properties; then > maps from this zoom level will be scaled to Viking's zoom level. You'd > probably also want to set Alpha). Right- and left-click to change the > scale by 1%. (You may have to pan again to see the change in lowers > under this, this is a bug) > > Of course, using these tools aren't as good as properly georeferencing > the map calculating the parameters from known points. I started a > program to do this once... but there are probably many now. > > Evan > > On Mon, Sep 21, 2009 at 9:40 AM, Jochen Kunz <jk...@unixag-kl.fh-kl.de > <mailto:jk...@unixag-kl.fh-kl.de>> wrote: > > On Sun, 20 Sep 2009 19:56:34 +0200 > Guilhem Bonnefille <guilhem.bonnefi...@gmail.com > <mailto:guilhem.bonnefi...@gmail.com>> wrote: > > > Yes, be really convinced that such feature is a recurrent request: > > "I want to use my scanned map, how to do that in viking?" > Ohhh, yes. This is really a FAQ and I am still looking for an > answer to > that FAQ. I really can't make any sense out of the parameters for the > GeoRef Map layer. > -- > > > tschüß, > Jochen > > Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/ > <http://www.unixag-kl.fh-kl.de/%7Ejkunz/> > > > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry® Developer Conference in SF, CA > is the only developer event you need to attend this year. > Jumpstart your > developing skills, take BlackBerry mobile applications to market > and stay > ahead of the curve. Join us from November 9-12, 2009. Register > now! > http://p.sf.net/sfu/devconf > _______________________________________________ > Viking-devel mailing list > Viking-devel@lists.sourceforge.net > <mailto:Viking-devel@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/viking-devel > Viking home page: http://viking.sf.net/ > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > Come build with us! The BlackBerry® Developer Conference in SF, CA > is the only developer event you need to attend this year. Jumpstart your > developing skills, take BlackBerry mobile applications to market and stay > ahead of the curve. Join us from November 9-12, 2009. Register now! > http://p.sf.net/sfu/devconf > ------------------------------------------------------------------------ > > _______________________________________________ > Viking-devel mailing list > Viking-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/viking-devel > Viking home page: http://viking.sf.net/ ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Viking-devel mailing list Viking-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viking-devel Viking home page: http://viking.sf.net/
