-------- Original Message -------- Subject: Map grids Date: Wed, 19 Apr 2006 12:17:01 +1000 From: Senja Randall <[log in to unmask]> To: <[log in to unmask]> A lot of our Australian maps are now published with both coordinates and grids. In the MARC bibliographic record we use the 034 and 255 to record the coordinates and we use the 342 to record the geospatial reference data. If a map is only published with the grids we use the Redfearn formula http://www.ga.gov.au/geodesy/datums/redfearn_grid_to_geo.jsp to change the grid to geographic and then enter this data into the 034 and 255 field. Has anyone started adding map grid information (i.e. the eastings and northings of the 4 corners of the map) into a MARC bibliographic record? We don't believe that the 'i' and 'j' subfields in the 342 field is used for this purpose. One of our records has the grid information recorded in the 255 field, eg. 255 $c (Australian map grid 1984, Zone 55. 5424000mN-5403000mN/503000mE-520000mE) but I'm not sure if this is the correct field either to be recording this information. I would also be interested in map cataloguers' views whether this information should be recorded (as it's not static) and if in the future we will need to provide access to this data via OPAC geospatial searching? Senja Randall Manager Maps & Music Unit Monographs and Special Materials National Library of Australia CANBERRA ACT 2600 Telephone : 61 2 6262 1303 Email : [log in to unmask]