[ka-Map-users] Highly Interested Developer with some questions

[Jacob Delfos]

Hi Paul,

Well, sort off..... with sideeffects. I think I mentioned them to you a while ago; In IE, PNG24 now comes out transparent (so that works), but at the moment in Firefox the transparent colour becomes black. Could be my setup. Maybe someone else can try.

regards,

Jacob
 

» -----Original Message-----
» From: Paul Spencer [mailto:pspencer at dmsolutions.ca] 
» Sent: 14 September 2005 20:00
» To: Jacob Delfos
» Cc: ka-map-users at lists.maptools.org
» Subject: Re: [ka-Map-users] Highly Interested Developer with 
» some questions
» 
» Jacob,
» 
» is the png hack working for you?  I had some problems with a 
» png24 layer 
» not being transparent in ie6 ... and it was apparently using 
» the hack so 
» I'm not sure what is going on
» 
» Cheers
» 
» Paul
» 
» Jacob Delfos wrote:
» > Clark / Pete,
» >  
» > Regarding the use of aerial photography and PNG24: I 
» noticed that Paul 
» > has integrated the changes (png transparency hack) into Ka-Map that 
» > allows PNG24 to be transparent in IE, along with changes allowing 
» > different image formats for different groups (by specifying an 
» > "imageformat" parameter in the metadata). So that is not a 
» limitation 
» > anymore to the use of aerial photography. I successfully 
» use jpeg format 
» > for full-colour imagery, and gif for our transparent vector layers.
» >  
» > Paul did mention about having issues with the png 
» transparency hack for 
» > 8 bit PNG images (which Mapserver appears to revert to for 
» vector data, 
» > even if PNG24 is the specified image format). But you could 
» now instead 
» > use gif for transparent layers, while using jpeg for 
» non-transparent 
» > layers, retaining the ability for full-colour images. Gif 
» transparency 
» > works in all browsers without problems, providing GIF is 
» specified as 
» > default outputformat in the mapfile (otherwise 
» php_mapscript appears to 
» > produce non-transparent gif images). I did some testing, 
» which showed 
» > GIF appears to compress indexed-colour images a fair bit 
» better than 
» > PNG8 too (lossless). For the JPEG layers, you can pick the desired 
» > compression, and significantly reduce image sizes that way, 
» somewhat 
» > reducing the speed problems that Pete mentioned.
» >  
» > regards,
» >  
» > Jacob
» >  
» >  
» >  
» >  
» >  
» > 
» --------------------------------------------------------------
» ------------------
» > From: ka-map-users-bounces at lists.maptools.org 
» > <mailto:ka-map-users-bounces at lists.maptools.org> 
» > [mailto:ka-map-users-bounces at lists.maptools.org] On Behalf 
» Of Peter Giencke
» > Sent: 14 September 2005 03:54
» > To: cendrizzi at gmail.com <mailto:cendrizzi at gmail.com>; 
» > ka-map-users at lists.maptools.org 
» <mailto:ka-map-users at lists.maptools.org>
» > Subject: RE: [ka-Map-users] Highly Interested Developer 
» with some questions
» >  
» > 
» > Clark,
» >  
» > 1) Yes you can; we've been using raster [wms] backdrops 
» extensively in 
» > many of our ka-map implementations. I've found however, 
» that speed can 
» > suffer (from mildly to greatly) depending on the number and 
» complexity 
» > of rasters used (duh). Also, best results are obtained when 
» using PNG24 
» > for this, but you'll have to 'hack' ka-map to enable PNG 
» transparency, 
» > so that 'layering' works in IE.  (There's a thread for that here: 
» > 
» http://lists.maptools.org/pipermail/ka-map-users/2005-August/0
00235.html). 
» > If these two concerns can be leveraged, the results are 
» very nice (I 
» > have an example of this here: http://mds.glc.org/kamap_cvs3/).
» >  
» > 2. Assuming you take the time to peruse the api's source code and 
» > consult the mailing-list archives, you should be able to get up and 
» > running within a weekend, or week, depending... Although 
» ka-map is a 
» > relatively new creation, it's still very functional at this 
» early stage.
» >  
» > -pete
» >  
» > 
» > 
» --------------------------------------------------------------
» ------------------
» > From: ka-map-users-bounces at lists.maptools.org 
» > <mailto:ka-map-users-bounces at lists.maptools.org> 
» > [mailto:ka-map-users-bounces at lists.maptools.org] On Behalf 
» Of Clark Endrizzi
» > Sent: Tuesday, September 13, 2005 2:17 PM
» > To: ka-map-users at lists.maptools.org 
» <mailto:ka-map-users at lists.maptools.org>
» > Subject: [ka-Map-users] Highly Interested Developer with 
» some questions
» >  
» > 
» > I run a development group that is developing a real estate 
» > application.(web based).  It's PHP and from the start we 
» have had the 
» > idea of including mapping software to integrate with 
» mapping stuff.  
» > We've looked at multiple web based mapping vendors, 
» including Arc IMS, 
» > but haven't found something that we consider a good 
» solution.  We want 
» > something that is easy to use like Google maps but also 
» very flexible.  
» > Furthermore it's important that we have the ability to 
» include it in our 
» > mostly closed source applicaton. 
» >  
» > I'm not really a mapping guru as most of my incomplete 
» knowledge comes 
» > from a mapping group in the same building so I have some 
» basic questions 
» > about whether we can use ka-map and contribute to it as well. 
» > 1.  Can you use aerial photography with ka-map?  We use 
» aerials provided 
» > by air photo USA and want to use that on our web based stuff.  I'm 
» > guessing right now only street maps are supported.  With 
» aerials, we 
» > need to use these images (they come in jpeg) and associate 
» their world 
» > files (which have the projection ifnormation in them).  Is this 
» > something that could be done with this software (if it 
» doesn't exist now 
» > could it be realistically added?).
» >  
» > 2.  Could we expect to use this stuff by the end of the 
» year?  Based off 
» > the examples it looks like ka-map is pretty far along...
» >  
» > Actually that's probably all the questions for now since our use of 
» > ka-maps is contigent on them.  Currently we have four developers 
» > including myself with pretty extensive experience in web 
» development, 
» > javascript (including just starting to get into "ajax" 
» stuff).  I hope 
» > it's clear that we're not trying to selfishly use and 
» expect ka-maps to 
» > work for us as we're willing to improve it to meet our needs if it 
» > doesn't have the functionality. 
» >  
» > I hope this can work out since you have done excellent work! 
» >  
» > Thanks,
» > -- 
» > -Clark Endrizzi
» > <mailto:jacob.delfos at maunsell.com> 
» > 
» > 
» > 
» --------------------------------------------------------------
» ----------
» > 
» > _______________________________________________
» > ka-Map-users mailing list
» > ka-Map-users at lists.maptools.org
» > http://lists.maptools.org/mailman/listinfo/ka-map-users
» 
» -- 
» +-----------------------------------------------------------------+
» |Paul Spencer                           pspencer at dmsolutions.ca   |
» +-----------------------------------------------------------------+
» |Applications & Software Development                              |
» |DM Solutions Group Inc                 http://www.dmsolutions.ca/|
» +-----------------------------------------------------------------+
» 
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