[postgis-users] Google Mercator and PostGIS under Ubuntu

[Frens]

Hi,

I am using PostGIS for a project quite succesfully until recently I tried
moving applications from my Windows based development environment to a
Ubuntu based test / demo environment. The postgis versions etc. are exactly
the same: "POSTGIS="1.3.3" GEOS="3.0.0-CAPI-1.4.1" PROJ="Rel. 4.6.0, 21 Dec
2007" USE_STATS". The database used on the Ubuntu machine is a restore of a
backup from the windows machine. (the database is an open street map db for
NL).

How ever I get some weird behaviour from the translate function on the
Ubuntu machine. For instance if I execute the following query:
SELECT ST_AsEWKT(
	ST_transform(
		ST_transform(
			GeomFromText(
				'POINT(5.167485 52.271499)',
				4326
			),
			900913
		),
		4326
	)
);

on my Windows machine I get: "SRID=4326;POINT(5.16748499999999 52.271499)".
Which is what I expect. However, when I execute the exact same query on my
Ubuntu machine (with the same postgis / postgres / etc versions) I get:
"SRID=4326;POINT(8.10187206703149e-07 8.19541802859524e-06)". The only qlue
I have is that I get this warning: WARNING:  transform: -38 (failed to load
NAD27-83 correction file).

So far googling didn't pay off... Anyone got some ideas?

P.S. 900913 is the SRID I use for the Google projection system, with the
following data in spatial_ref_sys: 

srtext =
"PROJCS["Google Mercator",GEOGCS["WGS 84",DATUM["World Geodetic System
1984",SPHEROID["WGS
84",6378137,0]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433]],PROJECTION["Mercator_2SP"],PARAMETER["standard_parallel_1",0],PARAMETER["central_meridian",0],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["Meter",1],EXTENSION["PROJ4","+proj=merc
+a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m
+nadgrids=@null +wktext  +no_defs"]]"

proj4text =
"+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0
+k=1.0 +units=m +nadgrids=@null +wktext  +no_defs"
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