Re: [udig-devel] Re: GPS Coordinates to Map

[Jesse Eichar <jeichar@xxxxxxxxxxxxxxx>]

Hi,

So what exactly are you trying to do here?  Just transform from a  
point in world space to a coordinate on the screen?  If that is the  
case then you can use one of the context's worldToPoint() methods to  
make the transformation.  Look at the AbstractContext interface for  
the code if you don't want to use the context methods directly (you  
can create a ToolContext with the method:   
ApplicationGIS.createContext(map).  Also all MapGraphics have access  
to a MapGraphics context.  A final place to look is the layer's  
layerToMapTransform().


Jesse


On 31-Oct-06, at 7:51 AM, Andy Czerwonka wrote:

> I'm really stuck on this one - new to the whole geospatial space.   
> Any help
> you be greatly appreciated.  I'm guessing that I should be looking  
> around in
> the GeoTools API somewhere for examples.  Somewhere there must be a
> translation from a shapefile coordinate to a screen rendering - can  
> anyone
> help?
>
> "Andy Czerwonka" <aczerwonka@xxxxxxxx> wrote in message
> news:eht3r7$f9k$1@xxxxxxxxxxxxx...
> > I'm wondering if someone can point me to sample where lat/long  
> > coordinates
> > (in this case, NMEA GPS coordinates) are transformed to a pixel  
> > location
> > on a map.
> >
> > The NMEA sentence format for geographic position looks like:
> >
> >        GLL - Geographic position, Latitude and Longitude
> >        GLL,4916.45,N,12311.12,W,225444,A
> >           4916.46,N    Latitude 49 deg. 16.45 min. North
> >           12311.12,W   Longitude 123 deg. 11.12 min. West
> >           225444       Fix taken at 22:54:44 UTC
> >           A            Data valid
> > Any pointers would be greatly appreciated.
> >
> > -andy
>
>
>
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