00520cam a22001814a 4500020001500000020001800015020001500033020001800048040000800066082002600074082001400100100002500114245004700139250001900186300005100205650003500256650004700291  a0471314250  a9780471314257  a0471427314  a9780471427315  cDLC04a025 CHR 2002 A006 Or.00a025.06/911 aChrisman, Nicholas R10aExploring geographic information systems /  aSecond edition  axiv, 305 pages :billustrations, maps ;c23 cm 0aGeographic information systems 4aSyst©·mes d'information g©♭ographique