ka-Map: new open source project

[Blammo]

Paul,

One thing I noticed, is that the zoomin/out functions seem like they
should paint the tiles from the center, outwards. The User focus is
usually centered on a view for example.  Would need a whole different
algorithm for the tile painting though.  :c)

Another thought, did you try the same thing with interlaced images?
More from a speed of navigation perspective than anything else.  I
suppose they would hurt overall performance in the end though.

bobb


  Paul Spencer wrote:

>ka-Map: new open source project
>===============================
>
>http://ka-Map.maptools.org/
>
>DM Solutions Group is pleased to annouce the release of a new MapTools
>open source project aimed at the growing interest in highly interactive,
>javascript mapping applications based on MapServer.  Here are some
>details ...
>
>ka-Map provides many of the features that one should expect in a
>state-of-the-art web-mapping application.
>
>Features include:
>
>* tile-based continuous panning
>
>* no page reloading
>
>* keymap, legend and scalebar
>
>* zoom in/zoom out
>
>* keyboard navigation
>
>* sliding effects for panning on double click (ok, that one's for fun!)
>
>We have also implemented some advanced features that are more in tune
>with the MapServer community's needs:
>
>* configuration can include multiple map files with different extents,
>image formats, and scales for each map file.  Client side interface can
>include the ability to change between map files
>
>* ability to have layer visibility controls by drawing each GROUP as a
>separate HTML layer on the client side
>
>* ability to use HTML legend template to build more advanced layer controls
>
>* flexible tile caching system
>
>* separation of the javascript logic from the HTML page to provide an
>API with which to build your applications
>
>ka-Map is built on AJAX principles and uses the XmlHttpRequest object to
>communicate with the server, providing a much more responsive user
>interface.  The server side is implemented using PHP/MapScript (what
>else!) but could easily be replaced with anything that would spit out
>the equivalent javascript in response to the various requests.
>
>ka-Map uses cached tiles generated on demand by drawing much larger map
>images and slicing them up.  The caching mechanism is currently quite
>simplistic and could not handle large data projects, but it is
>definitely sufficient for getting started.  There are issues with this
>kind of tile generation, but it is almost essential for performance
>given the current state of the art.
>
>ka-Map is aiming to be an API for developing mapping applications.  As
>such, we are hoping it will be picked up by, and integrated into, some
>of the other open source projects such as MapBender, ZMapServer,
>GeoServer, and (of course) Chameleon.
>
>The home of ka-Map is:
>
>http://ka-Map.maptools.org
>
>Downloads and CVS are not quite ready, but you can try out the interface
>by visiting our first public site based on this technology (basic
>features only in this one):
>
>http://maps.dmsolutions.ca/
>
>Subscribe to the user list to find out when downloads and CVS access are
>available, and also to participate in the ongoing development and
>testing of this new technology.
>
>http://lists.maptools.org/mailman/listinfo/ka-map-users
>
>We are hoping this project will engage the MapServer community's
>interest and gain momentum from user contributions.  Please join up and
>start contributing if you are interested in this technology!
>
>Sincerely,
>
>Paul
>--
>+-----------------------------------------------------------------+
>|Paul Spencer                           pspencer at dmsolutions.ca   |
>+-----------------------------------------------------------------+
>|Applications & Software Development                              |
>|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
>+-----------------------------------------------------------------+
>
>
>
>