[Proj4j] ESPG:28992

[Gertjan Idema]

I haven't seen this, but then I haven't used proj4j for a while.
The result you give for proj4j is definitely wrong. Any valid EPSG:28992
coordinate has x<y .

Gertjan

On Wed, 2012-01-11 at 09:09 -0400, jeff fitzgerald wrote:

> Hey Martin,
> 
> There just seems to be a big discrepancy for me between proj and
> proj4j.
> 
> Using the string with the tows84 method and 5.387638889,52.156160556
> as my test point, 
> - Proj gives me 154976.16420640881,463086.51164757559
> - proj4j gives me x = 4761867.817294979 y = 2527483.7229957823
> 
> Does anyone else get similar results?
> 
> Thanks.
> 
> Fitz
> 
> 
> On Tue, Jan 10, 2012 at 1:13 AM, Martin Davis <mtnclimb at gmail.com>
> wrote:
> 
>         Some more information on this issue.
>         
>         The addition of the towgs84 parameter happened last August, as
>         a result of this ticket:
>         
>         http://trac.osgeo.org/proj/ticket/96
>         
>         The SVN version of EPSG:28992 has the +towgs parameter,
>         whereas the version in the PROJ.4 distro archive does not.  
>         
>         Apparently this change was due to user demand, for what is a
>         apparently a more accurate definition.  If you search for
>         "EPSG:28992" you'll find lots of discussion about this.  This
>         blog post seems to be authoritative on the subject:
>         
>         http://oegeo.wordpress.com/2008/05/20/note-to-self-the-one-and-only-rd-projection-string/
>         
>         Out of curiousity, what are the issues that you're seeing with
>         this new definition?
>         
>           
>         
>         
>         On Mon, Jan 9, 2012 at 8:16 AM, <jeffery.fitzgerald at gmail.com>
>         wrote:
>         
>                 Hey,
>                 
>                 I noticed that the epsg file that ships with proj4j
>                 has a different entry for ESPG:28992 than I have seen
>                 in proj.
>                 
>                 proj4j epsg
>                 # Amersfoort / RD New
>                 <28992> +proj=sterea +lat_0=52.15616055555555
>                 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000
>                 +y_0=463000 +ellps=bessel
>                 +towgs84=565.417,50.3319,465.552,-0.398957,0.343988,-1.8774,4.0725 +units=m +no_defs <>
>                 
>                 gdal epsg
>                 # Amersfoort / RD New
>                 <28992> +proj=sterea +lat_0=52.15616055555555
>                 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000
>                 +y_0=463000 +ellps=bessel +units=m +no_defs <>
>                 
>                 Does anyone know why? It was causing me some trouble
>                 until I removed the towgs84.
>                 
>                 
>                 
>         
>         
>         
>         
>         
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> 
> 
> 
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