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[udig-devel] Re: Re: GPS Coordinates to Map
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Sorry - long and lat we're reversed.
"Andy Czerwonka" <czerwonka@xxxxxxxxxxxxxxxx> wrote
in message news:eiagas$bn6$1@xxxxxxxxxxxxx...
>
> "Jesse Eichar" <jeichar@xxxxxxxxxxxxxxx> wrote in
> message
> news:20BF789C-0A55-49FC-9B84-ACB7E0320A73@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().
>>
> [snip]
>
> I've got code that is correctly giving me the coordinates:
>
> double lat = getLatValue(location);
> double lon = getLonValue(location);
> Coordinate coordinate = new Coordinate(lat, lon);
>
> But, when I do this...
>
> MapGraphicContext context... (geeting it from the MapGraphic)
> Point point = context.worldToPixel(coordinate);
>
> I get a very large point - way off the screen. When I render it...
>
> point = buildPoint(context, location);
> int x = (int) point.getX();
> int y = (int) point.getY();
> graphics.fillRect(x - 3, y - 3, 5, 5);
>
> It's nowhere to be found...
>
> Help???
>
>
