No, he means adding it to the WKT itself. The extended WKT definition
from the CRS transformation spec includes a place to put metadata
about the objects in the WKT, such as what authority and number the
object derives from. Frankly, the only place I have seen it used is
in the WKT Martin's code creates when you instantiate a CRS from the
epsg-hsql factory then write it out as WKT. :)
The OGC standard geometry_columns table actually includes two
columns, AUTH_NAME and AUTH_SRID which are designed for holding this
kind of thing in OGC standard spatial databases. So the internal
database SRID might be "6", but the AUTH_NAME would be "EPSG" and the
AUTH_SRID would be "26910" so you could actually figure out that the
CRS originally derived from a particular EPSG CRS definition.
Fun fun.
P
On Feb 20, 2006, at 8:42 AM, David Zwiers wrote:
Don't know enough to provide the rest here ... but I think you
meant adding the espg# and WKT to a properties file ... while this
could be interpreted as inseting the WKT into the SRID metadata
table in the Oracle instance.
Can you elaborate a bit here (I would ... but I'm not familiar with
this portion of the code base).
Cheers,
David
The relationship between SRID and EPSG is rather tenious, you can
place
a EPSG:# authority in your WKT definitions to complete the handshake.
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