Unless otherwise indicated, all items on this website are copyrighted by the Geographic and Land Information Society. Use of information published on this site should be cleared with the Society. Information intended for use in educational programs is encouraged. We will be very happy to provide you with original materials and other information you may need upon request.
GEOGRAPHIC AND LAND INFORMATION SOCIETY
6 Montgomery Village Avenue, Suite #403
Gaithersburg MD 20879
www.glismo.org; Phone: 240-632-9700