[Qgis-user] pcs.csv parameters and Proj4

[Idan Miara]

Hi,

I'm trying to decipher pcs.csv (Is there a documentation?):
my guess was:
PARAMETER_VALUE_1=lat_0
PARAMETER_VALUE_2=lon_0
PARAMETER_VALUE_3=k
PARAMETER_VALUE_4=x_0
PARAMETER_VALUE_5=y_0

But apparently that's not exactly the case for parameters 1+2, for instance
(EPSG:2036):

http://spatialreference.org/ref/epsg/2036/proj4/: (same as in QGIS CRS
window)
+proj=sterea +lat_0=46.5 +lon_0=-66.5 +k=0.999912 +x_0=2500000 +y_0=7500000
+ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs

pcs.csv:
PARAMETER_VALUE_1=46.3 (not 46.5)
PARAMETER_VALUE_2=-66.3 (not -66.5)

for other projections I checked there is also difference in parameters 1+2,

What am I missing here?

Also, Does QGIS "generate" a proj4 definition from the pcs/gcs/datum csv
files by EPSG codes? if so, how?

Best Regards,
Idan
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