Re: [udig-devel] Display Routing Results - Mapgraphic vs Layer

[Emily Gouge <egouge@xxxxxxxxxxxxxxx>]

Yes I could probably make a IResource for my application.  But then do I 
have to create a service too?

Although personally I still think that temporary resource would be okay 
- maybe somebody actually wants to save out the results of there route 
so being pestered to save might not be all that bad.

Thanks for the info!

Emily

Jody Garnett wrote:
> Bah; the temporary resource is based on MemoryDataStore and is not
> really recommended; (make a spatial index based memorydatastore as
> soon as possible :-D ). They are intended as a holding ground for data
> the user is going to save out; thus if you were using them the user
> would be pestered to save the result when closing the map.
>
> So you are left with a couple ideas:
> - Can you make a resource for your application? The resource can hold
> stuff in memory if you like; You can copy MemoryDataStore or even just
> use a spatial index directly? Both have been done before.
> - Can we start up a MapDecorator interface that meets your
> requirements? You could consider it MapGraphic2 with extra methods for
> lifecycle and handling the difference between tiles and screen?
>
> On Thu, Apr 16, 2009 at 8:17 AM, Emily Gouge <egouge@xxxxxxxxxxxxxxx> wrote:
> > Hi All,
> >
> > We've been working on some tools to perform routing using PgRouting.
> > Currently we are using a MapGraphic to display the way points the user has
> > selected and the resulting route.
> >
> > This works well, however in the tiled rendering system it leads so some less
> > visual pleasing results.  The mapgraphic has to be re-rendered everytime the
> > user pans.  This is not so nice as all the other layers are cached as a part
> > of the tile and only re-rendered under specific situations.
> >
> > So, I've been experimenting with using TemporaryResources to display the way
> > points and resulting route.   I'm creating two TemporaryResources (one for
> > lines and one for points) and updating the features in the layers as the
> > user modifies waypoints.
> >
> > I'm wondering if anybody has any advice for me on using TemporaryResources
> > vs MapGraphics.  Is using TemporaryResources a bad idea?  Are they meant for
> > something else?
> >
> > Thanks,
> > Emily
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