TY  - RPRT
TI  - The National Map: from geography to mapping and back again
AU  - John A. Kelmelis
AU  - Mark L. DeMulder
AU  - Charles E. Ogrosky
AU  - J. Nicholas Van Driel
AU  - Barbara J. Ryan
PY  - 2003
DO  - 10.14358/pers.69.10.1109
UR  - https://pubs.usgs.gov/publication/70156743
ID  - 70156743
ER  -