A Contextual Survey of the Southern Walls

Shelby Eagleburger

GRAM-NSF-REU, California State University-Long Beach

Ka’a’awa Valley, Kualoa Ranch, Oahu, Hawai’i, 2013

Project Focus

Are there commonalities in the context of the

walls that run down the southern slope that may

help in the production of a predictive model to

locate similar features in other valleys?

Methodology & Obstacles• Survey• Systematic

• Identification• Distinctive Attributes• Linear in shape• Composed of

unworked rock• Exist in an

agglomerated structure

• Problems• Vegetation• Hindered travel and

GPS signal• Equipment• Identification• Lack of Experience• Time Constraints

• Documentation• Pictures• Slope• X,Y,Z• Context

WRONG WAY TO ORGANIZE DATA!!!

Vegetation Cover Problem

3D Visualization

The walls are

consistently built in

areas with slopes

ranging from

approximately 15 to

24 degrees and 100

to 200 meters in

elevation

The clinometer readings

were consistent with the

slope analysis

There were some outliers

however the reading were

taken on the walls

themselves and not the

ground

Average Nearest Neighbor Result

• Observed Mean Distance:

35.600709 Meters

• Expected Mean Distance:

16.953117 Meters

• Nearest Neighbor Ratio: 2.099951

• Z-Score: 5.15449

Linear Directional Mean • Mean Length: 56.276551 m

• Mean Height: 1.24 m

• Mean Width: 0.76 m

• Mean Compass Angle (clockwise from

due North): 90.4108

• Circular Variance (how much

orientations deviate from the mean):

0.042463

Wall Aspect

North Northeast Southeast

Wall Aspect

1 North

2 Northeast

3 North

4 Northeast

5 Southeast

6 North

Conclusions• Further Research

• Looking into other analogous

valleys that may share some

of the same traits to see if

the same type of features

appear.

•Common Traits• Construction• Height: 0.65 to 1.45 meters• Width: 0.4 to 1.12 meters

• Building Area• Slopes: 15 to 24 degrees • Elevation: 100 to 200 meters