Check/Create new SRID

Question

Hi,
I have a OGC WKT Projection String as below.
"PROJCS["Everest_Modified_Lambert_Conformal_Conic",GEOGCS["GCS_Everest_Modified",DATUM["Everest_Modified",SPHEROID["Everest_1830_Modified",6377304.063,300.8017]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic_2SP"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",77.53055555555555],PARAMETER["Standard_Parallel_1",27.08333333333333],PARAMETER["Standard_Parallel_2",27.25],PARAMETER["Latitude_Of_Origin",27.16111111111111],UNIT["Meter",1.0]]"
Now I need to check whether this projection is already available or not. What are the steps to do this?
If not available then how to create a new SRID and its steps? In what tables changes will occur?
What is the procedure to check and create SRID for Geodetic and Projected coordinate System with an example.
I am using 11gR2.
Thanks & Regards
Gouse

Answer 1

Gouse,
To check, the simplest is possibly querying the CS_SRS table...
PROJCS["Everest_Modified_Lambert_Conformal_Conic",
  GEOGCS["GCS_Everest_Modified",
    DATUM["Everest_Modified",SPHEROID["Everest_1830_Modified",6377304.063,300.8017]],
    PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],
  PROJECTION["Lambert_Conformal_Conic_2SP"],
    PARAMETER["False_Easting",0.0],
    PARAMETER["False_Northing",0.0],
    PARAMETER["Central_Meridian",77.53055555555555],
    PARAMETER["Standard_Parallel_1",27.08333333333333],
    PARAMETER["Standard_Parallel_2",27.25],
    PARAMETER["Latitude_Of_Origin",27.16111111111111],
         UNIT["Meter",1.0]]
-- Try...
select srid, cs_name, wktext
  from cs_srs
where UPPER(wktext) like '%EVEREST%MODIFIED%';Nothing with Lambert in it.
To create a new SRID, see the documentation "6.9 Creating a User-Defined Coordinate Reference System" as it is quite clear on what to do.
regards
SImon