contour line
contour interval
index contour
elevation contour
datum
sea level
topographic map
x,y,z data examples
x,y location
z value
locating a point
number line
linear interpolation
two points lie on a straight line
plane (planar surface)
three points lie in a plane
triangulation of scattered data points
triangulation with linear interpolation
parallel contours on planes
interpretation after linear interpolation
examples of scattered x,y,z data
grid (grid model)
grid node
advantage of grid
grid algorithm
color-filled contours
smooth slopes
hills
closed contours (closure)
ridges
saddles
noses
depressions
creeks and valleys
V-ing of contours at creeks
direction of flow from V-ing of contours
Bone Canyon location
Bone Canyon topography description
Bone Canyon topography elevation range
Apache Canyon location
Apache Canyon topography description
Apache Canyon topography elevation range
alluvial fan
