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GPS 3D Modeling for Heritage Visualization
Trimble
5600 Robotic Total Station
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The Trimble
TS5600/5700/5800 combination includes: (a) high performance robotic
total station (b) a reflector-less electronic distance measurement
capability and (c) a GPS based capability. |
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The
reflector-less unit is used to precisely (+/- 5 mm at 600 meters) locate
targets placed in the laser profiler, multispectral camera and digital
camera fields-of-view, while the GPS based capabilities allow all measurements
to be aligned with geodetic control within centimeter accuracy.
Report
- Double Ditch Trimble 5600 Microtopographic Survey
Mapping
Microtopography at Double Ditch State Historic Site, North Dakota - Plains
Conference Presentation 2004
The
Double
Ditch Site, North Dakota, (32BL8) is an unusually large fortified
archeological site located on a high terrace above the Missouri River.
It was most likely abandoned by the Mandan during the smallpox outbreak
of the 1780s. Double Ditch is known for its significant topographic variations
that define two fortification ditches, numerous depressions over former
houses and borrow pits, and mounds as tall as 3 m. At approximately 4.8
hectares within the second or outer ditch seen in the topography, it is
one of the largest fortified settlements along the Middle Missouri River.
It is also distinctive in the size and number of its large midden mounds,
some over 3 meters, the many shallow depressions 12-18 meters in diameter
that signify the loci of former houses, and its readily apparent double
fortification system from which it derives it's name.
A
Trimble 5600 robotic theodolite was employed to produce a high-resolution
digital elevation model (DEM) of the site to preserve its appearance as
it exists in 2004, and aid in the interpretation of archaeological and
remote sensing data from a four year project. The instrument is controlled
by radio from a wheeled reflector rod and acquires one measurement/second.
Using pre-established 20 m grid squares a survey protocol was developed
where the rod was zigzagged in approximately 1 m intervals to yield an
array of points with approximately 1 m separation (the interval was later
raised to 2 m to speed up survey). A 1 m resolution DEM was produced from
these points through interpolation. It clarifies several archaeological
and remote sensing issues, particularly with regard to understanding patterns
of earth movement and borrowing, aids in visual interpretation of the
site, and raises several new questions.
In
the past few seasons Dounble Ditch has been the subject of extensive geophysical
surveys with magnetic gradiometry, resistivity, and thermal instruments.
Trimble
5600 Robotic Total Station Operating Instructions
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