Developing Widgets (was Re: [Chameleon] Large TIFF not rendering)

[Paul Spencer]

Paul,

I have started to put such a document together, I will try to send you 
what I have next week ... some review would be a good idea, programmers 
don't necessarily make good writers :)

Paul

Paul Dymecki wrote:
> Hi,
>   I was wondering if there is any documentation anywhere on the steps to go
> about for developing new widgets?  I've been looking at the html docs but
> they seem a little meagre,
> thx,
> Paul
> ----- Original Message -----
> From: "Delfos, Jacob" <jacob.delfos@maunsell.com>
> To: <spencer@dmsolutions.ca>
> Cc: <chameleon@lists.maptools.org>
> Sent: Thursday, April 01, 2004 6:49 PM
> Subject: RE: [Chameleon] Large TIFF not rendering
> 
> 
> 
>>Paul,
>>
>>The release I have is cwc2-1.0.4-20031112. I am definitely using a
> 
> map-file
> 
>>(didn't hack it, at least not that bit). I had an ECW of around a 100MB
>>which I used initially. Because I wasn't happy with the graphic quality
>>(greenish planet mars-looking landscape, supposedly Australia) I fixed it
> 
> up
> 
>>in photoshop. Unfortunately, since the free ECW software can typically
> 
> only
> 
>>support up to 500MB, I couldn't save it back to ECW, so I converted to
> 
> TIFF.
> 
>>However, now chameleon won't load it (doesn't hang on it either, though).
>>All I changed is the filename in the DATA statement. The tif has a TFW
> 
> file,
> 
>>and I also created an ERS file for it; no effect.
>>
>>A better alternative to my problem would be a freeware program that
>>compresses >500MB to ECW. The new ECW sdk does it, but you'd need a
> 
> license
> 
>>to do it commercially (and visual C++).
>>
>>What else could cause a TIFF not to display? I'm not using compression.
>>
>>Regards,
>>
>>Jacob
>>
>>
>>-----Original Message-----
>>From: Paul Spencer [mailto:pagameba@magma.ca]
>>Sent: Thursday, 1 April 2004 23:07
>>To: Delfos, Jacob
>>Cc: 'chameleon@lists.maptools.org'
>>Subject: Re: [Chameleon] Large TIFF not rendering
>>
>>
>>Jacob,
>>
>>there is not, as far as I know, any limitations on size of data files.
>>
>>If you are using Chameleon 1.0.4 then you are accessing layers via WMS
>>by loading a context file, unless you have hacked the source to do
>>something different?  This would mean that the type of the file is
>>essentially immaterial.  Can you explain what you are trying to do?
>>
>>Delfos, Jacob wrote:
>>
>>
>>>Hi List,
>>>
>>>I'm trying to display a geoTiff file of slightly less than a gigabyte,
>>>but it's not rendering. My TFW file is valid, because it shows alright
>>>in ArcGIS. It is in the same projection as the mapfile. I couldn't find
>>>any similar issues in the archive. Is there a limit on the filesize for
>>>a TIF? I'm using Chamaleon version 1.0.4. The TIF is RGB, 24bit.
>>>
>>>Thanks in advance,
>>>
>>>Jacob
>>>
>>>
>>>*JACOB DELFOS
>>>SPATIAL INFORMATION ANALYST
>>>*Maunsell Australia Pty Ltd
>>>629 Newcastle Street
>>>PO Box 81
>>>Leederville 6902
>>>Western Australia
>>>ABN 20 093 846 925
>>>
>>>Tel     + 61 8 9281 6185
>>>Fax    + 61 8 9281 6297
>>>_jacob.delfos@maunsell.com_
>>>
>>
>>--
>>  -----------------------------------------------------------------
>>|Paul Spencer                           pspencer@dmsolutions.ca   |
>>|-----------------------------------------------------------------|
>>|Applications & Software Development                              |
>>|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
>>  -----------------------------------------------------------------
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> 
> 
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-- 
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|Paul Spencer                           pspencer@dmsolutions.ca   |
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|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
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