Re: [Geoserver-users] Geoserver & uDIG

[Eduin C. <yec...@ya...>]

Thanks Rueben and Justin. Seems that the problem continues. 

What I did:

1. Change the map SRS to 21892 
2. Load another shapefile (SRS 21892) and looks fine
3. Tried to load WFS and the previously loaded file disappears.

:-(

Another thing, "Map Preview" shows an empty map with this entity.    

According to docummentation, SRS WKT text are loaded from   spatial_ref_sys
table (postgresql).

Eduin



 --- Rueben Schulz <rs...@in...> escribió:

> Hello,
> 
> There are many possible reasons why this might not work, but I suspect 
> Justin's suggestion below should work (set map CRS to data CRS).
> 
> For reference this is the 21892 WKT (from the epsg.properties file):
> 
> PROJCS["Bogota 1975 / Colombia Bogota zone",GEOGCS["Bogota 
> 1975",DATUM["Bogota_1975",SPHEROID["International 
>
1924",6378388,297,AUTHORITY["EPSG","7022"]],AUTHORITY["EPSG","6218"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4218"]],
>
PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",4.599047222222222],PARAMETER["central_meridian",-74.08091666666667],PARAMETER["scale_factor",1],PARAMETER["false_easting",1000000],PARAMETER["false_northing",1000000],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","21892"]]
> 
> The transverse mercator projection is supported in getools, so that is 
> not the problem.
> 
> I do not know where geoserver is getting CRS (aka SRS) information; 
> perhaps a geoserver person can answer this for me (since I am interested 
> in knowing). If it is from the epsg.properties file, then the CRS has no 
> TOWGS84 parameters (needed for a datum transform). Since the uDig map 
> defaults to WGS84, it will not be able to transform from the Bogota to 
> WGS84 datum.
> 
> Of course the CRS for the data could be coming from somewhere else (but 
> geoserver people should be able to help you here).
> 
> By setting your map CRS to 21892 (as Justin suggested), uDig should not 
> have to do any transform and should not complain.
> 
> If this is indeed the problem, geoserver may want to consider using the 
> new CRS authority factory backed by hsql. It has the full epsg database 
> with all of the datum shifting parameters. However, it seems to be a bit 
> slow when I was using it at home.
> 
> Well, that is my best guess, good luck.
> Rueben
> 
> 
> --- Justin Deoliveira <jde...@un...> wrote:
> 
>  > I am going to cross post this to the udig and
>  > geotools lists, someone
>  > will have an answer. My guess is that the necessary
>  > transform may not be
>  > present?
>  >
>  > What happens if you first set your map to this
>  > projection, and then add
>  > your data?
>  >
>  > -Justin
>  >
>  > Eduin Carrillo wrote:
>  > > I were trying to do WFS requests from uDIG to my
>  > Georverver without success.
>  > >
>  > > Data seems to be properly configured but uDIG
>  > shows a red cross over that
>  > > datasource. My data has SRS 21892 (Bogota/Bogota
>  > datum)
>  > >
>  > > Any hint?
>  > >
>  > >
>  > > Eduin
>  > >
>  > >
> 
> 


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