Mike, Here is a good tutorial overview of the georeferencing tool in QGIS: http://qgis.spatialthoughts.com/2012/02/tutorial-georeferencing-topo-sheets.html If the image is not in coordinate space, it will not line up with your other data. so this operation will be necessary. Also, just as a side, I would think that an export from Powerpoint would degrade image quality (depending on the original). I would look at and maybe try for future use The Gimp (which is an open source, free Photoshop-type application). It will give you more control on export of not only various output formats but also pixel and color depth, and the like. The official site is http://www.gimp.org/. Best Regards, James
Date: Mon, 3 Feb 2014 19:59:14 -0500 From: [email protected] To: [email protected]; [email protected] CC: [email protected] Subject: Re: [Qgis-user] How do I register a Google Map? OK, I installed the Open Layers plugin and it works very nice but it won't do what I need, so let me be more specific and see if there might be a remedy. The contour lines that I want were actually obtained using a hand held Garman GPS. The Garman data was overlaid on the Google map, (with water depths), special integration, then that map was exported as a Jpeg, then imported to PowerPoint where a visual interpolation was done to make the final set of contour lines for the various lake water depths. My desire is the digitize these contour lines as a set of separate layers. ie 5' deep, 10' deep, etc. There are many good uses for these layers, but they must be accurate as to location and size. I don't think I necessarily need spacial info on the "map"/Jpeg if I can get the whole map in the right position, and size, so I can do the digitizing (which would then have the spacial info). Then I can discard the Jpeg. Is it hopeless? Mike K
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