*===========================================================================================================
* The Norwegian Petroleum Directorate's Fact-Pages. Description of download file.
*===========================================================================================================
* CONTENTS: Production licence. Coordinates, complete history.
*-----------------------------------------------------------------------------------------------------------
* CSV SPECIFICATIONS:
*-----------------------------------------------------------------------------------------------------------
* - column delimiter  : ,
* - text qualifier    : "
* - decimal separator : .
* - date format       : dd.mm.yyyy
*-----------------------------------------------------------------------------------------------------------
* COLUMN SPECIFICATIONS:
*-----------------------------------------------------------------------------------------------------------
* column name                    datatype       description
* .............................. .............. ........................................................
* production_licence_name        varchar(40)    The designation of the production licence.
*
* date_valid_from                date           The date the production licence is valid from.
*
* date_valid_to                  date           The date the given area is valid to. 
*
* polygon_no                     int            The sequence number of the polygon in the given area.
*
* quadrant                       int            The designation of the quadrant the polygon belongs to.
*
* block                          int            The designation of the block the polygon belongs to.
*
* polygon_area                   real           The calculated size of the polygon.
*                                               Unit of measure: km2
*
* point_no                       int            The sequence number of the co-ordinate point depicting 
*                                               (one of several) the given polygon.
*
* ns_degrees                     real           North-South geographical co-ordinates in decimal degrees.
*                                               Datum: ED50
*
* ew_degrees                     real           East-West geographical co-ordinates in decimal degrees.
*                                               Datum: ED50
*
* date_generated                 date           The date the download file was generated from the NPD's
*                                               databases.
*
* NPDID_production_licence       bigint         NPD's unique production licence id.
*
*-----------------------------------------------------------------------------------------------------------
* HISTORY:
*-----------------------------------------------------------------------------------------------------------
* date       changed by  description
* .......... ........... ...................................................................................
* 24.01.2003 OHO/NPD     Initial version
*
* dd.mm.yyyy nnn/ccc     description of changes
*===========================================================================================================