terms and concepts Arlinghaus, Sandra L. text Boca Raton CRC Press c1994 monographic 335 p., [8] p. of plates : ill. (some col.), maps (some col.) ; 25 cm. Digital mapping Geographic information systems 526 CRC 1994 A023 Co. 0849301319 (acidfree paper) http://www.loc.gov/catdir/enhancements/fy0744/93023662-d.html http://www.loc.gov/catdir/enhancements/fy0744/93023662-d.html