[ka-Map-users] ka-map-0.1.0 source package available

Paul Spencer pspencer at dmsolutions.ca
Wed May 18 21:00:30 EDT 2005

Please note that this version is 'almost' identical.  It includes a 
couple of bugs that have been fixed in the live version ... the fixes 
didn't make it into this version.  The problems are:

* Mozilla - when zooming in to large scales, you may experience problems 
with dragging the mouse for movement.  This is because the numbers used 
to calculate the position of each image are generated by a pixel offset 
from the center of the projection (0,0) at the given scale.  As the 
scale decreases, these pixel offsets get quite large.  When you get over 
1,000,000 (or there abouts), Mozilla's CSS implementation starts taking 
liberties with how these numbers are represented and converts them to 
scientific notation with a fixed precision that causes the numbers to 
get rounded to the nearest 10 - 100 - 1000 depending on the scale.  The 
fix was to use a floating origin so the numbers never get larger than 
1-2000.  This problem also manifested itself in IE as a problem loading 
the images ... they would get loaded after a pan but wouldn't show until 
a mouse-down-event happened.

* Opera - I changed how the interface was set up because Opera doesn't 
support transparency through CSS yet.  With this change, Opera becomes 
mostly functional.

Once CVS access is available, I will integrate these modifications and 
prepare a 0.1.1 download since the changes are reasonably important.

My appologies to Daniel, he volunteered to build the package and I 
forgot to apply the changes before he sent it out.



Daniel Morissette wrote:
> Hi everyone,
> A first version of the ka-map source, including the JavaScript 
> client-side files, and the server-side scripts for PHP MapScript is now 
> available on the downloads page of the site:
> http://ka-map.maptools.org/index.phtml?page=downloads.html
> A README.TXT file is included in the package with basic installation 
> instructions.
> This development snapshot has been tagged as version 0.1 and is exactly 
> what is used by our live demo, the only difference is that our demo has 
> a slightly different index.html than the one included in the source 
> package. The main trunk in CVS contains some of the additional features 
> that Paul mentioned, but it's not in working shape at the moment. You'll 
> be able to get it once the CVS server is available in the next couple of 
> days.
> A ka-Map package for MS4W is also available, see http://maptools.org/ms4w/
> Daniel

|Paul Spencer                           pspencer at dmsolutions.ca   |
|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|

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