Hello, All !<br>

<br>

I have to make coordinate transformation from one projection<br>
 PROJCS["Custom",GEOGCS["GCS_Clarke_1866",<br>
DATUM["Not_specified_based_on_Clarke_1866_ellipsoid",SPHEROID["Clarke_1866",6378206.4,294.9786982]],<br>
PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Stereographic"],<br>
PARAMETER["False_Easting",0],PARAMETER["False_Northing",0],PARAMETER["Central_Meridian",0],<br>
PARAMETER["Scale_Factor",1],PARAMETER["Central_Parallel",90],UNIT["Meter",1]] <br>
id (300006) to another, GEOGCS["Unknown datum based upon the Krassowsky
1940
ellipsoid",DATUM["Not_specified_based_on_Krassowsky_1940_ellipsoid",SPHEROID["Krassowsky
1940",6378245,298.3,AUTHORITY["EPSG","7024"]],AUTHORITY["EPSG","6024"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],<br>
UNIT["degree",0.01745329251994328,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4024"]]<br>
(id 4024)  make sql-statement <br>

 SQL: select astext ( transform ( GeomFromText ('POINT (-2898380.75 -2900345.00)', 300006),4024));<br>

and sometimes I receive error transform: couldn't project point: -20 (tolerance condition error). Because I work with polar<br>

regions I think that this error is connected with possible singularities in projections. Which way I have to trace this cases ?<br>
Previous message was with an error, sorry.<br clear="all"><br>-- <br>Best regards,<br>Sincerely yours,<br>Yuriy Rusinov