000 00796cab a2200217 4500
001 ABS44851
008 090401t1991 xxu||||| |||| 00| 0 eng d
035 _a(Sirsi) u49455
041 _aeng
100 _aLorriman, N.
245 _aAll digital terrain modelling systems are not equal
260 _c1991
350 _a0
490 _aCivil Engineering Surveyor
_v16(6) July/August 1991, 22-27(6)
520 _aThis paper explains the role of digital terrain models (DTMs) and highlights the strengths and weaknesses of the three most common systems: string, regular grid and triangular. Provides detail of thirteen software packages currently available.
650 _aCOMPUTERS
650 _aDIGITAL GROUND MODELLING
690 _aLAND SURVEYING
942 _n0
948 _c04/03/1997
999 _c30950
_d30950