KAS Symposium
Geospatial Analysis in the Great Plains
Poster Presentation Title/Author
BUTLER COUNTY GEOLOGIC MAP: Case Study of Map Production at the Kansas
Geological Survey (KGS). Jorgina A. ROSS, Kansas Geological Survey,
University of Kansas, Lawrence, KS 66047
Abstract
Many steps are used in creating a county geologic map at the KGS. The
geologist begins data collection on a 7.5' USGS topographic map, at 1:24,000
scale. The geologic data are obtained through field observation, aerial
photography, and other sources. Using digital data from the Kansas
Cartographic Database (KCD), a mylar base map is produced with the same
scale and projection as the USGS topographic map. The base map displays the
Public Land Survey (PLS), hydrography, and principal geographic features shown
on the USGS map. The geology is transferred to the mylar base map. The mylar
base is then used as input to digitize the geology, creating a binary database
for the quadrangle. These steps are followed for each of the quadrangles that
cover the county. All databases are edge-matched, topology is built and
polygons attributed for each quadrangle. After checks for accuracy, individual
quad databases are combined to form a digital county geologic database. A
digital layout base is created with titles and legends. Overlays of features
from KCD, such as hydrography, county lines, PLS, roads and cities, are color
coded and labeled. The geology, combined with all other features, is then
merged into a plot file for plotting. The Geologic Map of Butler County was
produced using the GIMMAP (Geodata Interactive Management Map Analysis and
Production) system developed at the Kansas Geological Survey. Export routines
permit use of data in ArcView and other GIS software.
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