John Preston ha scritto:
> Hi, Can someone indicate whether the SRS code in the feature type
> definition for a shapefile actually is used. I have a vector shape
> file data that I register with geoserver. and enter the correct epsg
> code (24200) which is in the data/user_projections/epsg.properties
> file. It displays ok via the open layers map preview window. However
> when I try and view it using the KML output, it points me half way
> around the world from where it should be. Is the SRS code used to
> reproject the vector data to 4326 for kml output, or is it ignored?
It is used.
> Probably I am really asking if the kml output can accomodate vector
> data not in WGS84 projection.
It should, but for the reprojection to be correct, your WKT definition
must match the actual data, if it does not, the output will be like
to the one you're seeing (data reprojected in the wrong
location).
As far as I can see, 24200 is an official EPSG code and GeoServer
supports it out of the box, so you should not need defining it
in epsg.properties. Actually, in this case, your custom definition
will be ignored since there is an official one:
PROJCS["JAD69 / Jamaica National Grid",
GEOGCS["JAD69",
DATUM["Jamaica 1969",
SPHEROID["Clarke 1866", 6378206.4, 294.9786982138982,
AUTHORITY["EPSG","7008"]],
TOWGS84[-33.722, 153.789, 94.959, -8.581, 4.478, -4.54,
1.8460700159115124],
AUTHORITY["EPSG","6242"]],
PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
UNIT["degree", 0.017453292519943295],
AXIS["Geodetic longitude", EAST],
AXIS["Geodetic latitude", NORTH],
AUTHORITY["EPSG","4242"]],
PROJECTION["Lambert Conic Conformal (1SP)", AUTHORITY["EPSG","9801"]],
PARAMETER["central_meridian", -77.0],
PARAMETER["latitude_of_origin", 18.0],
PARAMETER["scale_factor", 1.0],
PARAMETER["false_easting", 250000.0],
PARAMETER["false_northing", 150000.0],
UNIT["m", 1.0],
AXIS["Easting", EAST],
AXIS["Northing", NORTH],
AUTHORITY["EPSG","24200"]]
If your 24200 is not equivalent to this one, you'll have to
create your own custom code, write the WKT in epsg.properties,
restart GeoServer and then use it in your feature type.
> On a related question, when I am using the featuretype editor and
> click on the "Lookup SRS" button, the SRS input box comes back with
> UNKNOWN always, even if I have a valid code in the box before I select
> it.
The lookup button will try to match the SRS embedded natively in your
data (if any) with an official EPSG code, it won't look up the code
you typed. UNKNOWN means your data source has no SRS information, or
the one it has does not exactly match any official EPSG code.
> Also the SRS List link bring up the page not found
> ("http://localhost:8084/geoserver/config/data/srsHelp.do";) error. Is
> this link currently working. I am using Geoserver 1.6.4
Yep, should be fixed in the next release:
http://jira.codehaus.org/browse/GEOS-1971
In the meantime, you can use the SRSList link appearing in the
GeoServer admin console home page, or just go to:
http://locahost:8080/geoserver/srsHelp.do
(eventually change the host and port to match your installation).
Cheers
Andrea
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