[Mapserver-users] Dynamic extent without mapscript

[Stephen Woodbridge]

You can calculate the an extent as:

xmin = X - dx;
ymin = Y - dy;
xmax = X + dx;
ymax = Y + dy;

where X, Y is the location of the vehicle and dx, dy are an appropriate 
constant. you might try dx and dy = 0.013 or 0.026 to start with if your 
data is in decimal degrees (DD)

-Steve W.

Jenu Abraham wrote:

> Is there anyway to set the extent of the map based on a query in the 
> virtual spatial file
> 
> 
> 
> i'm not using mapscript
> -------------
> i have positions of vehicles updated regularly in my table...
> 
> i'm making the virtual spatial file dynamically using asp.net
> 
> i want the map to be zoomed automatically to a certain extent when a 
> customer selects a particular vehicle....
> as the vehicles are on a constant move its not possible to have a static 
> extent with the closed up zoom i want.
> 
> or is there anyway to calculate the extent based on the location?
> ------------
> 
> Jenu
> 
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