LandCoords

tblLandCoords, shared across files, organized polygon point lists by TDWG codes for land areas

   Level1ID, character, 1 byte, = tblGeoLevel1.Level1ID
   Level2ID, character, 1 byte, = tblGeoLevel2.Level2ID
   Level3ID, character, 3 bytes, = tblGeoLevel3.Level3ID
   Level4ID, character, 3 bytes, = tblGeoLevel4.Level4ID
   Polygon, integer, 4 bytes, 1-based index of polygon list for this code combination
   Point, integer, 4 bytes, 1-based index of point list
   Xlon, float, longitiude coordinate in degrees
   Ylat, float, latitiude coordinate in degrees