1. Sara Welge
Lab 5
GEOG48224
5/23/2014
1. The offsets refer to the viewpoints relationship to the ground, how high or low it is. The vertical
angle refers to How high above and below the horizon a viewer can see. The azimuth defines
the direction of view, east to west, and north to south.
2. This analysis is only capturing things at the ten square meter level, and doesn’t account for
things like trees that may cause visibility to differ significantly in real life from the analysis.
3. Raster resampling takes the inputs and converts all of them to the same measurement system
and the same scale. Bi linear resampling uses all surrounding cells an averages them, this
method is good for continuous data like temperature or elevation. Nearest Neighbor resampling
relates the center of the original cell to the nearest cell center of the second layer. This method
is best for discrete data sets. Since the data is in terms of elevation and slope (continuous data)
it would be best to use Bi-linear. However there is also an aspect (discrete data) layer which may
be better suited to nearest neighbor.

2. ^_
^_
^_ Viewpoints
McCully Trail
Trail Visibility
Value
High : 105
Low : 0
^_
^_
McCully Trail
^_ Viewpoints
contourmap
Base Map Visibility From The Trail
¯
0 0.65 1.3 1.95 2.60.325
Miles
¯
0 0.85 1.7 2.55 3.40.425
Miles
Projection: Lambert_Conformal_Conic
False_Easting: 1312335.958005248
False_Northing: 0.0
Central_Meridian: -120.5
Standard_Parallel_1: 43.0
Standard_Parallel_2: 45.5
Latitude_Of_Origin: 41.75
Linear Unit: Foot (0.3048)

3. ^_
^_
#*
#*
View Shed From Both Look Outs
View Shed From East Look Out
View Shed From West Look Out
^_ Viewpoints
McCully Trail
Visibility
Value
Visible From One Point
Visible From Both Points
#* West View Point
McCully Trail
Visibility
Value
Not Visible
Visible
#* East View Point
McCully Trail
Visibilility
Value
Not Visible
Visible
0 2 41 Miles
0 1 20.5 Miles0 1.5 30.75 Miles
¯ ¯
¯
East View Point
Aspect 264.3619
Hill Shade 212.6734
Slope 29.16117
West View Point
Aspect 129.2697
Hill Shade 60.77104
Slope 31.27201

4. View points
McCully Trail
Visiblity
Visible From East view point
Visible From West View Point
Visible From Both Points
Figure A
Fig. A shows a 3D rendering of the McCully trail,
viewpoints, and the Basin. The visible areas from the east
view point are shown in blue, the visibility from the from
the west is in yellow and the visible area from both is
shown in green.