000 00613cab a2200193 4500
001 WB2424-26
008 090401t1988 xxu||||| |||| 00| 0 eng d
035 _a(Sirsi) u42956
041 _aeng
245 _aDigital update
260 _c1988
350 _a0
490 _aEstates Gazette
_vno 8823, 11/6/88 p30
520 _aOrdnance Survey has announced a Digital Update System , a unique service which maintains the currency of digital maps immediately after the surveyed change has been recorded.
650 _aDIGITAL MAPPING
690 _aPRACTICE AND TECHNIQUES
942 _n0
948 _c04/03/1997
999 _c27471
_d27471