Carolina Bay Survey Graphs



Most of the Carolina Bay Survey data is being aggregated into Google Fusion tables. These cloud-based tables are live, and output graphs are embeddable. A recent addition to the toolkit is a “zoomable” map, which addresses the challenge of presenting detailed data in the context of a massive database. Most appropriate use for us would be the Bearing vs Octant charting. Here is the live zoomable graph, showing how the Bearing generally rotates with the Octant, where lower Octant values represent lower values of Latitude.




Here is an example, showing the ratio seen in the survey, as compared to the bay surface area (hectares).




This graph portrays a histogram of bay sizes in 1 hectare buckets. This represents over 7,000 bays.



The bays in Nebraska are far fewer in number:

histogram_of_nebraskan_bay_sizes

This graph plots the measured bearing vs the longitude of the locations.




Here is a live Fusion Tables zoomable graph showing how the average eccentricity of the bays changes across the range of octants; higher octant number == more northerly. Note that within each block of Octants, the longitude varies and has an effect on the bearing value. Bays in Nebraska appear at the highest Octant values.



We expect the arrival bearing to pivot around our proposed Saginaw impact site. Here is the base graph of bearing by Octant. We expect the graph to “ratchet” based first the latitude (most significant part of Octant value) and the longitude at it varies for each latitude (least significant part of Octant value)



Note that some of the Octants above 160xxx are in Nebraska, west of the impact location, which causes a jump in the bearing as the chart switches to the Western bearings.



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