[Therion] Transparent map-images

[thierrygonon]

Yes, you can't have transparency in jpg format. Png accept it, as pdf, 
but pdf isn't supported in therion map editor...

Here's the way I'm working (a little bit trikky, but it works !) :
from therion, get the centerline trace, with station points, in pdf format.
Open it with Inkscape, and place your scans, redraw them, using Béziers 
curves
Save the file in th2 format (for this, download and install the 
extension made by Jürgen Bohnert : see 
http://therion.speleo.sk/wiki/doku.php?id=inkscape).
Once you've done this, you will be able to open your vector file in the 
map editor, and to correct it as you want (change line type...)

Regards

Thierry

Charles Ghommidh a écrit :
> To my knowledge, there is no way to make a jpeg transparent. Use png 
> instead (if Therion support this format...)
>
> Regards
>
> CG
>
> Le 14 juin 09 à 12:03, Bruce Mutton a écrit :
>
>> Hi All
>> Michael and I are putting some large scanned map-images on our 
>> therion pdf plots, but near the point where they overlap, one always 
>> overwrites the other.  We’d rather they be transparent so one 
>> map-image can be seen through the other.
>>  
>> Will it help if I can figure out how to make the white background of 
>> the original scans transparent?
>>  
>> Does anyone have any tips for making the white area of a jpg or pdf 
>> image transparent?  I have access to Adobe Elements, but I’m not very 
>> good with it, and although there are instructions for doing this I 
>> didn’t have much luck comprehending what was required.
>>  
>> Regards
>> Bruce
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