[Mapserver-users] Theme legend visualization

blammo bob.basques at ci.stpaul.mn.us
Wed Apr 7 22:33:45 EDT 2004


All,

This is a general question about visualization of themes in a Layer control.

My first thoughts were to build something that shows all Layers 
available from a MapServer in all view levels to be displayed for 
toggling the Layers on/off.

Different LAYERs have different MIN/MAX scales.  The question is, how 
have other tried listing all Themes and still make it obiuos (visually) 
to the user, that a Theme is available or not available for a particualr 
Zoom level.

I've done similar controls by simply showing only those Layer that are 
pertinent to the current view.  But it would be nice if the Control 
could display when a particular theme is available for viewing at 
specfic scale values.

Related to this, I had though about possibly building a Control that 
would use some sort of sliding scale for each theme that would indicate 
to the user where in the server scale range thier particualr View was, 
and also where each particular theme would come into view.

I'll mock something up after I send this.

anyone have similar ideas, or am I too far left with the idea(s)

:c)

bobb






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