I am doing some CASE tool research with PostGIS as main 'data repository'.
My test data is Portuguese Cadastral digital data set, which, together with the
Orthophoto Map series from IGP (Civil Mapping Agency from Portugal) uses a CRS
that is not listed in the spatial_ref_sys table. It is close to the SRID=27492,
the main difference lies on the false origin amounts. Here is the definition
from ESRI (titled 'Datum_73_Hayford_Gauss_IGeoE'):
Projection: Transverse_Mercator
False_Easting: 200180,598000
False_Northing: 299913,010000
Central_Meridian: -8,131906
Scale_Factor: 1,000000
Latitude_Of_Origin: 39,666667
Linear Unit: Meter (1,000000)
Geographic Coordinate System: GCS_Datum_73
Angular Unit: Degree (0,017453292519943299)
Prime Meridian: Greenwich (0,000000000000000000)
Datum: D_Datum_73
Spheroid: International_1924
Semimajor Axis: 6378388,000000000000000000
Semiminor Axis: 6356911,946127946500000000
Inverse Flattening: 297,000000000000000000
My question is how to properly add this new CRS, and define a new SRID, into
the spatial_ref_sys table?
Note: I have checked also the EPSG v6.14 data for PostGRE_SQL, but it had not
this CRS definition either.
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