[Qgis-user] How do I register a Google Map?

[James Wood]

My apologies. I sent an older link to the georeferencer, but a link to a newer version is at the top of that page. I should also mention that this is now part of the core product in 2.0, so no need to download a plugin. From: jwood911 at gmail.com
To: tmike.elhoa at comcast.net
CC: qgis-user at lists.osgeo.org
Subject: RE: [Qgis-user] How do I register a Google Map?
Date: Tue, 4 Feb 2014 01:28:46 +0000




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: tmike.elhoa at comcast.net
To: tech at wildintellect.com; etourigny.dev at gmail.com
CC: qgis-user at lists.osgeo.org
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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