[ka-Map-users] Re: mouse quest

percy percyd at pdx.edu
Mon Oct 30 12:24:50 EST 2006


There were enough little annoyances that looked they would take a long 
time to fix and a lot of custom programming that I decided to go with 
OpenLayers as the front end interface to my KaMap backend "tiling machine".

This gives a much more googlemaps-ish interface, and Paul Spencer 
blessed the union back in the Summer :-)
My understanding is that kamap is positioning itself as a tiling 
mechanism, perhaps the one that satisfies the description at 

Here's a site that I am using to test the latest code from CVS,

We'll be putting a version on the USGS production site within the next 
week or two at http://ngmdb.usgs.gov/ngm_compsearch_map.html, replacing 
the kamap IFrame that you see there and adding a bunch of "AJAX-y" stuff 
like immediate updated number of hits in the database for the current 
search criteria.

Basically every time the user moves the map or zooms, the extents are 
updated a query is sent off to the database to find out how many records 
we have for that area.

Let me know if you want more info on OpenLayers/Kamap config. I actually 
promised to put something together, and have been remiss in doing so!


> Message: 1
> Date: Mon, 30 Oct 2006 03:46:52 +0100
> From: Zeppe <taroza at gmail.com>
> Subject: [ka-Map-users] mouse quest
> To: ka-map-users at lists.maptools.org
> Message-ID: <4545679C.1070505 at gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> Hi everyone,
> I don't know how about you, but I really don't like the mouse behaviour 
> in ka-map. At least the way it is implemented in kaNavigator.
> First I can't set the cursor in FireFox. When it is cursor:move in 
> stylesheet it activates only when I am on the border of the map viewport.
> Second and the most annoying thing is when mousepressed and you drag it 
> outside the map viewport, then try to comeback with mouseup kaNavigator 
> treats it as the mouse is pressed and drags it further with jumping efekts.
> Third kaNavigator has such implementation for mouseout:
> Well, I've been struggling with these three problems for the whole day 
> but in vain. Basically, what I wanted to do is to make mouse behave like 
> in GoogleMaps: you drag the map until mouseup.
> Is there anyone who has a clue about solutions for these problems? I've 
> looked up many examples in ka-map wiki, but no one has approached these 
> problems.
> Thanks in advance, guys
> Zeppe
David Percy
Geospatial Data Manager
Geology Department
Portland State University

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