SERC Data Table of Contents

meta key # modl003
dataset or series of data land use for Eastern shore and Piedmont study watersheds
keywords watershed, land use, Maryland, Pennsylvania, Delaware
originator Weller, D.E., Jordan T.E.
file format ARC/INFO polygon coverage
platform Windows NT
study site locale York county, PA; Newcastle and Sussex counties, DE; Cecil, Queen Annes, Wicomico, Baltimore, Harford, Carroll counties, MD
beg. date (yyyymmdd) 1991
ongoing? no
end date (yyyymmdd) 1991
meas. freq. once
site size 30575 ha
# of stations 3196 polygons
west long. -77.002
east long. -75.599
north lat. 39.742
south lat. 38.453
parameters area, perimeter, landuse#, landuse-id, landuse, crops, livestock, qualifier. The landuse item contains land use codes. 20 land use codes are in the data set: 11, 12, 13, 15, 21, 22, 23, 24, 25, 31, 32, 33, 34, 42, 45, 50, 62, 74, 75, 99. The corresponding land use categories are: 11 - developed (buildings/residential yards), 13 - commercial buildings and shopping malls, 15 - roads, 21 - row crop, 22 - contour/strip crop, 23 - orchard, 24 - feedlot/poultry house, 25 - farm yard, 31 - active pasture, 32 - hayfield, 33 - mowed grass (non-hayfield, park), 34 - fallow, 42 - forest and forested wetland, 44 - shrubs/brush (natural), 45 - old field, 50 - water, 62 - herbaceous wetland, 74 - bare rock, 75 - mine/quarry/etc., 99 - unknown. 5 crop codes are in the data set: 1 (corn), 3 (soy), 6 (wheat), 23 (orchard), 32 (hayfield).
current sharing available to collaborators
current advertising status scientific pub, SERC public web site
abstract Land use for NSF study watersheds sampled with automated stream samplers. Watersheds in Inner and Outer Piedmont clusters, and Upper, Middle, and Lower Coastal Plain clusters. Land use patches were traced from 1987 or 1998 1:9600 NAPP (National Aerial Photography Program) photos onto clear plastic overlays. Classifications were verified with ground observations in fall, 1991. Data were later digitized from overlays into ARC/INFO and geographically referenced to USGS 7.5 minute topographic maps. This land use data is part of a study to test the effects of agricultural land use on discharges of water, sediments and nutrients from Piedmont watersheds of the Chesapeake Bay.
additional documentation / reference article Jordan et al., J. Environ. Qual. 26: 836-848 (1997). Jordan, et al., J. Am. Water Res. Assn. 33: 631-645 (1997).

Last Updated on 8/8/01
By Michelle Berger