[Proj] armenian coordinate system

[Markus Neteler]

On Sat, Apr 3, 2010 at 6:13 PM, beppe <beppenapo at gmail.com> wrote:
> "Re-hi" Markus ;)
> Excuse me, but I'm not so "competent" with gdal tool (and the
> documentation does not help me!!!).

(perhaps that better for the GDAL list)

> My epsg_tr.py -pretty_wkt 2555 output is:
>
> PROJCS["Pulkovo 1942 / 3-degree Gauss-Kruger zone 38",
>    GEOGCS["Pulkovo 1942",
>        DATUM["Pulkovo_1942",
>            SPHEROID["Krassowsky 1940",6378245,298.3,
>                AUTHORITY["EPSG","7024"]],
>            AUTHORITY["EPSG","6284"]],

I guess that your GDAL version is too old. There have been improvements
in the datum logic which are needed here.

...
>
> How to add towgs84?

Copy-paste from my previous email :) Or try this (store as .prj file):

epsg_tr -wkt 2555
PROJCS["Pulkovo 1942 / 3-degree Gauss-Kruger zone 38",GEOGCS["Pulkovo
1942",DATUM["Pulkovo_1942",SPHEROID["Krassowsky
1940",6378245,298.3,AUTHORITY["EPSG","7024"]],TOWGS84[23.9,-141.3,-80.9,-0,0.37,0.85,-0.12],AUTHORITY["EPSG","6284"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4284"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",114],PARAMETER["scale_factor",1],PARAMETER["false_easting",38500000],PARAMETER["false_northing",0],AUTHORITY["EPSG","2555"],AXIS["X",NORTH],AXIS["Y",EAST]]


> At this moment the best result is epsg:2498.

Here you go:

epsg_tr -wkt 2498
PROJCS["Pulkovo 1942 / Gauss-Kruger CM 45E",GEOGCS["Pulkovo
1942",DATUM["Pulkovo_1942",SPHEROID["Krassowsky
1940",6378245,298.3,AUTHORITY["EPSG","7024"]],TOWGS84[23.9,-141.3,-80.9,-0,0.37,0.85,-0.12],AUTHORITY["EPSG","6284"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4284"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",45],PARAMETER["scale_factor",1],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],AUTHORITY["EPSG","2498"],AXIS["X",NORTH],AXIS["Y",EAST]]

Markus