[Talk-ca] Using ImportImagePlugin in JOSM

[Sam Vekemans]

Sweet! Thanks Stuart.
Now i can go back todo what i was doing :)
qgis is a powerfull program, and the support developers are that of
brilliant minds.


I still cant get qgis running on my computer, but i found that the
problem is with my computer, and not the program.


Hopefully you'll figure it out.


cheers,
Sam

On 1/30/11, Peter Freeman <petersfreeman at gmail.com> wrote:
> Hi Stewart,
>
> Thanks!  I have just installed Quantum GIS (I'm running Ubuntu 10.10)
> and have loaded the JPEG as a raster file and am now learning how do do
> what you suggested.
>
> Cheers,
>
> Peter
>
> Peter Freeman
> 180 Musgrave Place
> Salt Spring Island, V8K 1V5
> British Columbia, Canada
> (250) 653-4623
> http://members.shaw.ca/petersfreeman
>
> On 11-01-30 11:24 AM, Stewart C. Russell wrote:
>> Hi Peter,
>>
>> It's been a while since I hand-rolled a world file. If you can, install
>> a recent version of QGis, as it has a truly excellent georeferencer. You
>> click on control points on the bitmap, indicate the coordinates they
>> represent in the real world, then set the system off transforming the map.
>>
>>
>>> The map file is called map.jpg and I have created a world file called
>>> map.wld
>> I'd call that map.jgw, which is the convention for JPEG world files.
>> (TIFF has tfw, PNG pgw, and so on.)
>>
>>> 100.0
>>> 0.0
>>> 0.0
>>> -100.0
>>> 103.5
>>> 1.5
>> Ooh, that can't be right. Lines 1 and 4 are units/pixel; if you're using
>> geographic coordinates, that's 100°/pixel. This wants to be a small
>> number.
>>
>>
>>> Can you give me reasonably correct values for my world file?
>> Lines 1 and 4 might want to be 0.01 and -0.01 respectively for 100
>> pixels/degree.
>>
>>> Do I need to create a projection file
>> It helps, but these are even harder to produce by hand than world files.
>> I think that QGis can produce them in the georeferencer.
>>
>>  Stewart
>>
>> _______________________________________________
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>>
>


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