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<div class="moz-cite-prefix">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. <br>
<br>
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.<br>
<br>
My desire is the <u>digitize</u> 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.<br>
<br>
Is it hopeless?<br>
<br>
Mike K<br>
<br>
<br>
<br>
2/3/2014 4:09 PM, Alex Mandel wrote:<br>
</div>
<blockquote cite="mid:52F00579.9090304@wildintellect.com"
type="cite">
<pre wrap="">On 02/03/2014 01:07 PM, Etienne Tourigny wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Simple jpeg files do not have any spatial information.
you should use the Open Layers plugin - you need to install it with the
Plugin Manager(Plugins->Manage and install plugins) and then add a Google
maps layer through the Plugins->Open layers menu item.
On Mon, Feb 3, 2014 at 6:28 PM, Mike Keelan <a class="moz-txt-link-rfc2396E" href="mailto:tmike.elhoa@comcast.net"><tmike.elhoa@comcast.net></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap=""> Hi all.
I am new to this program use. I have the following setup.
- I'm trying to use Qgis 2.0
- My PC is with Windows 8 OS
The program downloaded successfully and I'm able to load my .shp and Ortho
layers, all well and good. Still learning, but .......... Here is my
current problem.
I need to overlay a Google map containing some lake bottom contour lines.
The file I pulled in as a layer is a .jpg. I'm able to view this layer if
I zoom to its extent seperatly from the other layers, so I know it is there.
1. How do I get this layer in the location I need it to be in relative
to my other layers? Looking at the coordinates for this layer extent it
has defaulted to 0.0 at the upper-left hand corner. From the properties
box it will not let me change this info?
2. If there is a way the register this layer, it looks like the scale
is about 50% of the size of my other layers. I got this from using the
linear measurement tool on both layers. Is there a way to adjust the size
of the jpg layer?
3. In making the above measurements I noticed that the units were
given in meters even though the coordinate system selected is indicated in
FT for both layers. ??
Hope some one can point me in the right direction.
Mike K
</pre>
</blockquote>
</blockquote>
<pre wrap="">
If it's really from Google Maps, try the OpenLayers plugin which will
live overlay maps from the web as a layer, then you don't need to
georegister the image yourself.
Enjoy,
Alex
</pre>
</blockquote>
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