[ka-Map-users] Animated Maps - iboattrack.mapsherpa.com

[Paul Spencer]

iboattrack actually includes time-sensitive wms layers for sea  
surface temperature and wind speed/direction that are dynamically  
updated with the time series, so it is possible.  However, it is  
quite slow to do this and ka-Map is maybe not the right platform for  
such an application.

In any event, I did write a new type of layer class that periodically  
refreshes itself.  This was for a specific client so I probably won't  
share that code.  However, it is relatively straight-forward to do if  
you take the time to learn how ka-Map works.

Cheers

Paul


On 24-Mar-06, at 10:58 AM, Peter Slizik wrote:

>
>     Dear Paul,
>
> thank you for your answer.  There are two possible approaches to  
> the problem,
> the animation work can be done either on the browser's, or on the  
> server's
> side. In first case, I'd use for instance absolutely positioned  
> <div>'s, in
> second case, I'd have MapServer pre-generate a load of images  
> (frames) and
> let the browser change them. If I got it right, you've used the first
> possibility. Unfortunately, it is quite useless in my case (displaying
> time-changing meteorological data). I wonder if AJAX is suitable  
> for this
> kind of task... will need some experimenting...
>
> Roy
>
>> Its actually not that tricky to implement.  You need time-series
>> point data.  ka-Map supports plotting point data and updating the
>> position of existing points so you need to develop a mechanism for
>> looping through your time series and updating the points.

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