Hi Fran,
I am not exactly sure I understand the problem. Working with the graph
in projected coordinates should work just fine, there should be no need
to transform the coordinates to lat/long, unless you have that requirement.
As for EPSG:4694, i notice that it is supported in recent version of
geotools:
GEOGCS["POSGAR 94",
DATUM["Posiciones Geodesicas Argentinas 1994",
SPHEROID["GRS 1980", 6378137.0, 298.257222101,
AUTHORITY["EPSG","7019"]],
AUTHORITY["EPSG","6694"]],
PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
UNIT["degree", 0.017453292519943295],
AXIS["Geodetic longitude", EAST],
AXIS["Geodetic latitude", NORTH],
AUTHORITY["EPSG","4694"]]
Which version are you using?
-Justin
FranGM wrote:
> Hi there.
> I've got a shapefile of my city which a turned into a graph. Now I wanted to
> use a DijkstraShortestPathFinder. To create a weighter I want to find out
> the length of each edge of the graph (the orthodromic distance between its
> nodes).
> Each Node has a "getObject" method from where you can get a Point with
> coordinates. What I would like to know is how are this coordinates (big
> doubles with around 7 non decimal ciphers) related to "real coordinates"
> (lat/long).
> Thing is, my data seems to be in ARGENTINA POSGAR94, zone 4, datum WGS84 (as
> I can read in the readme file). I found over the net that this corresponds
> to EPSG:4694, but it seems that the GeodeticCalculator class does not know
> about it.
> In other words, I think I'm getting troubled with something that is probably
> easy.
> May anyone lend me a hand in this subject?
>
> Thanks in advance
>
> Fran
>
--
Justin Deoliveira
The Open Planning Project
http://topp.openplans.org
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