Re: GMT4: How to make page background transparent?

Hi.

That approach seems to make the white in the colormap transparent (not 
what I want to do) but does not affect the page color or background 
color (which is what I want to be transparent).

J.

On 11/15/13 12:45 PM, Andy Jacobson (NOAA Affiliate) wrote:
> I think Imagemagick will rasterize it, even if going vector-vector.  At least, that’s my experience.
>
> -Andy
>
> On Fri 15 Nov 2013, at 13:44 , John Helly <[email protected]> wrote:
>
>> Thanks. I'm trying to stay in vectorland so that seems like a good solution.
>> J.
>>
>> On 11/15/13 12:41 PM, Andy Jacobson (NOAA Affiliate) wrote:
>>> Hi John,
>>>
>>> If you can’t do it “the right way”:  a quick and dirty solution is to make the background a distinct color, then use Imagemagick to change that color to transparent:
>>>
>>> convert -transparent white <in> <out>
>>>
>>> will make transparent all the white pixels.  Apologies to all the ps2raster lovers.
>>>
>>> -Andy
>>>
>>> On Fri 15 Nov 2013, at 13:32 , John Helly <[email protected]> wrote:
>>>
>>>> Hi.
>>>> I've looked around but can't find a solution.
>>>>
>>>> I'm using grdimage followed by psbasemap to produce a map. I've created a custom colormap and its high-end is white (255/255/255).
>>>>
>>>> I would like to print the white in the map at high elevation but have the page background transparent.  Currently the code produces a white background outside of the map frame as well as in the interior of the map.
>>>>
>>>> I don't seem to be able to find the right parameter(s) to do this with so maybe it's not possible?
>>>>
>>>> J.
>>>> -- 
>>>> John Helly, University of California, San Diego / San Diego Supercomputer Center / Scripps Institution of Oceanography / 760 840 8660 mobile / stonesteps (Skype) / stonesteps7 (iChat) / http://www.sdsc.edu/~hellyj
>>>>
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>>>> <hellyj.vcf>
>> -- 
>> John Helly, University of California, San Diego / San Diego Supercomputer Center / Scripps Institution of Oceanography / 760 840 8660 mobile / stonesteps (Skype) / stonesteps7 (iChat) / http://www.sdsc.edu/~hellyj
>>
>>
>> To unsubscribe, send the message "signoff gmt-help" to [email protected]
>> <hellyj.vcf>

-- 
John Helly, University of California, San Diego / San Diego Supercomputer Center / Scripps Institution of Oceanography / 760 840 8660 mobile / stonesteps (Skype) / stonesteps7 (iChat) / http://www.sdsc.edu/~hellyj


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