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

[Alex Mandel]

As mentioned before you'll need to use the Georegistration tool to
generate spatial info for your jpeg. Once thats done it will line up
with other data and you can digitize new layers on top. If you still
have the Garmin data that might help with all of the steps.

Enjoy,
Alex

On 02/03/2014 04:59 PM, Mike Keelan wrote:
> 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
> 
> 
> 
>  2/3/2014 4:09 PM, Alex Mandel wrote:
>> On 02/03/2014 01:07 PM, Etienne Tourigny wrote:
>>> 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 <tmike.elhoa at comcast.net>
>>> wrote:
>>>
>>>>   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
>>>>
>> 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
>>
>>
> 
> 
> 
> 
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