Analyzi y 4 . 
yzing and Mapping Natural Landscape Factors—Ozark Province 51 
boundari . 
Sraphic apa e drawn following drainage lines and other topo- 
rcs ts ans to include areas with relief intervals of 100 feet, 
s being continued from one sheet to another 
= Agee : 
elke Lines and relief values were transferred to a 1 :1,000,000 
ae p on which a grid had been drawn to show the location 
e topographic sheets. 
Sl 
steep an es made to emphasize the high percentage of 
in the Ozarks, the divisions ch e : 
to land use as follows: chosen being related 
a nies - 2 per cent and less (low )—better agricultural 
bee ad os es cent inclusive (medium)—typically pasture ; 15 
are higher for se (high) —commonly wooded. These slope values 
a, corresponding land uses than those obtained by 
among he ne wi pies England’?, due to a number of causes, 
is most import e resistance of the cherty mantle rock to erosion 
= thea: ae Angles of slope were expressed in per cent 
ometer. Fo visualization and field measurements with a clin- 
and the éotlo oe of the area topographic maps were available 
owing procedure was employed: 
ec uGre ene aphic sheets, areas of similar physiography 
a ene in heavy pencil and boundaries were continued to 
quadrangles. 
ea ee straight lines were drawn across each area in 
id Valera ons, traversing physiographic features, as ridges 
, approximately at right angles. 
nd a celluloid scale, on which 
By means of a dividers a 
n, measure- 
the spaci 
a 
pacing of contours for various slopes was show 
19, Edu Rak 
N sz and Joyce Henry: An Average Slope Map of 
mites Phe Geogr. Rev., Vol. 27, 1937, pp- 467-472; reference is 
