[Proj4j] ESPG:28992

[Frank Warmerdam]

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.


Fitz,

The definition from proj4j is more appropriate as far as I know.  The old
gdal epsg definition you see likely dates from the time when if there were
conflicting towgs84 definition we just didn't pick any of them.  Now we
pick one somewhat arbitrarily from the available set.

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Software Developer