Profile cover photo
Profile photo
Carolina Bay Survey
22 followers -
A Comprehensive Geospatial Survey of the Enigmatic Carolina Bays
A Comprehensive Geospatial Survey of the Enigmatic Carolina Bays

22 followers
About
Carolina Bay Survey's posts

Post has attachment
Continuing on with the new 15 cm NC LiDAR, I have re-generated the Manteo quad LiDAR tiles at 2m resolution. Of the Quad, only one Octant has bays, and all 11 are on Roanoke Island. They make quite a tasty collection. They all show significant signs of having been inundated by flooding and over-run by dunes, yet they stay true to the bayCarolina planform and all clock at ~130.25º orientation. Here is a link to the Octant: http://cintos.org/ge/survey/Octants/143302.kmz
Photo

Post has attachment
Updated LiDAR and survey results from the USGS Barnwell Quad.

http://cintos.org/ge/survey/100K_quads/Barnwell.kmz
Photo

Post has attachment
North Carolina has begun rolling out a new generation of LiDAR.  At this point almost 75% of all the "Carolina bay" region has been flown.  I am beginning to re-generate the LiDAR hsv-shaded DEM for Google Earth use at 2-m resolution. In this instance, only the southern 20% of the Virginia Beach Quad is in NC, but the new data joins sub-meter LiDAR previously available from VA.

This is quite a "small" Quad, and contains but a few handfuls of bays. I find them important, as they demonstrate correlation to the bays on Virginia's Eastern Shore, just across the bay mouth.

You can begin the exploration of this tile set using the Survey 100K- Quad link:

http://cintos.org/ge/survey/100K_quads/Virginia_Beach.kmz
Photo

Post has attachment
In support of my presentation at the GSA 2015 Meeting, I acquired and processed almost 60 billion classified data points on sub-meter spacing from Virginia. During 2014, the USGS executed series of LiDAR data flights in support of the Coastal National Elevation Database (CoNED) Project. In the state of Virginia, the acquisition covered the counties of Spotsylvania, Caroline, Hanover, Henrico, Chesterfield, Dinwiddie, Sussex, Richmond City, Hopewell City, Colonial Heights City, Orange, Louisa, Amelia, Nottoway, Prince Edward as well as Petersburg City.

I re-assembled several USGS-100K Quads of my Google-Earth tiled overlay sets to include the new counties. Here are the links to retrieve the relevant survey elements.

http://cintos.org/ge/survey/100K_quads/Emporia.kmz
http://cintos.org/ge/survey/100K_quads/Petersburg.kmz
http://cintos.org/ge/survey/100K_quads/Richmond.kmz

Photo

Post has attachment
After a six-moth hiatus, I am again posting information about a specific Carolina Bay on my daily CBoD blog. Hope you can find something of interests along the way.

Post has attachment
Offering a planform identical to those in nearby lower New Jersey, and an orientation similar to those bays, new LiDAR from Long Island, NY reveals numerous small depressions which may be Carolina Bays. I had the opportunity to visit this particular structure while on a field trip hosted by Dr. Gill Hanson of NY State University at Stony Brook.

The surface of Long Island is consider to have been fully resurfaced by glacial outwash during the last glacial maximum. If so, the presence of these structures constrains the formation date to within the last 20,000 years. Such a determination puts a big wrinkle in my 140,000 + date, and needs to be resolved. There are only a few locals where these landforms exist on Long Island, and they all see to be within ares which are at lower elevations than nearby surrounding landscapes. Is it possible those small ares were simply not overrun with outwash? 

Most of Long Island is available in sub-meter LiDAR, and you can load my version of the hsv-shaded elevation map imagery into Google Earth using the following KMZ file:

http://goo.gl/HPCKsD
Photo

Post has attachment
Here is another video showing the Carolina Bay Survey methodology. There is a second half to this, under the name BaySurvey_NewSC_LiDAR-b

Post has attachment
New LiDAR available in South Carolina offers better view of a bay with multiple secondary rims.

Post has attachment
The Ambulant Scholar offers an in-depth view of a real Carolina Bay.

Swamp is swamp is swamp, right? Not in the least. After my trip, I did some metaphorical digging. It became clear to me that Carolina bays tell a far more interesting story than I had imagined. What at first was legible only as undifferentiated swamp resurfaced as an ecologically unique environment.

Post has attachment
The State of South Carolina released their LiDAR elevation data for the counties of of Edgefield and Aiken yesterday. My LiDAR imagery for the Aiken USGS 100K Quad has been updated.

Among the most valuable data for my needs in the release is the area near Ridge Springs. There is a stretch of bays along a ridge at over 600 feet above sea level. I have created an image of a section and am now using it here as my Google+ cover image.
Wait while more posts are being loaded