[MetaCRS] Proj4js: Converting from EPSG:4326 -> EPSG:28193 fails

[Mike Adair]

Josh,

The cassini projection code ("proj=cass") hasn't been implemented in 
Proj4js yet.

Mike
 

Josh Rosenthal wrote:
> Hi Folks,
>
> I hope I'm sending this to the right list.  Apologies if not.
>
> I'm hitting a bit of a problem with a proj4js conversion, and I'm 
> hoping someone can help.  I'm trying to go from EPSG 4326 to 28193, 
> and I'm just getting my original coordinates returned.  As per 
> http://spatialreference.org/ref/epsg/28193/ , I have the proj4js 
> definition for 28193 as: 
>
> Proj4js.defs["EPSG:28193"] = "+proj=cass +lat_0=31.73409694444445 
> +lon_0=35.21208055555556 +x_0=170251.555 +y_0=1126867.909 
> +a=6378300.789 +b=6356566.435 
> +towgs84=-275.722,94.7824,340.894,-8.001,-4.42,-11.821,1 +units=m 
> +no_defs";
>
> To demonstrate, I've modified the converter in the proj4js homepage to 
> also have 28193 (Old Israel Grid/Palestine 1923) and 2039 (New Israel 
> Grid).  
> You can see the demo here: http://arkeotech.googlepages.com/Proj4js.htm 
>
> Converting the coordinates 35,31 from 4326 to 2039 works fine, but 
> from 4326 to 28193 just returns 35,31.  Looking at the spatial 
> reference page for 28193, you can use the viewer to get an 
> approximation for those coordinates... it should be somewhere roughly 
> around 149353, 1046172
>
> Any thoughts?
>
> Thanks,
>
> Josh
>
>
>
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-- 
   Michael Adair
   Senior Software Architect
   DM Solutions Group Inc.

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