[udig-devel] automated: map layer selection, styling, zoom to desired bbox, export pdf/svg/other?

[Jesse Eichar]

>
> For each available 'route id':
>
> 1) Define a style for our layers which only colours/shows the  
> points/lines with this route id.
>

Basically you come up with a SLD that has a rule for each ID.  A rule  
has symbolizer that indicate how to style the feature and a rule  
restricts what features the symbolizers can apply to.  A rule has a  
Filter that is used to determine whether or not the rule applies to  
the Feature.  See FilterFactory and FilterFactoryFinder for details  
on filters.  And StyleBuilder and StyleFactory on creating styles.

> 2) Zoom to the bbox of those points/lines (with a bounding envelope  
> of 500m, say)
>

Sounds like a tool you might want to create.  There is a page on the  
website that discusses tools but it looks like the site is down so  
you'll have to do a search when it comes up.  For now look at the  
net.refractions.udig.project.ui.tool extension point in the IDE.

> 3) Export the resulting area (ideally to a vector format such as  
> pdf/svg, else to png)
>

There is a builtin extension point called for exporting.  It will add  
your functionality to the export menu.

> 4) Add some annotation/legend to the export

The MapGraphic extension is a good one to use for annotations and  
other custom information you want to put on the map.

There is a legend mapgraphic and a grid mapgraphic that you can use  
as examples.

>
> Of course there's no need for the 'Map' to really do all that  
> zooming/styling/rendering onscreen -- it could happily just render  
> to a suitable "export device".
>
> Can anyone point us to what is and is not available to help with  
> the above, and any suggestions for how to go about steps 3,4 in  
> particular?
>
> thanks for any advice,
>
> Vince.
>
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