Mapping techniques have changed greatly since the first geologic maps were created by the Indiana Geological Survey in the 1800s. Our new poster calendar reflects these changes by contrasting a hand-drawn and lettered 1893 map with a present-day map made using a computerized geographic information system. The 2005 calendar, "Mapping Indiana Geology: Present and Past," measures 21 by 33 inches, and is printed in full color on heavy poster paper