Right Whale Paper Published
A paper by GMI marine scientists Amy Whitt, Kathleen Dudzinski, and Jennifer Laliberté has been published in the journal Endangered Species Research. The authors summarize right whale sightings and acoustic data collected from the first year-round study dedicated to marine mammals in New Jersey’s nearshore waters.
Cultural Resources TxDOT Win
The Cultural Resources group of the GMI Environmental Services Division was awarded an Archeological General Services contract by the Texas Department of Transportation in February. One of four awardees, GMI will be involved in archeological survey, test excavations for National Register eligibility determinations, and data recovery projects across the state of Texas.
Biological Inventory Study for Melrose AFR
GMI wildlife biologists, in conjunction with Cannon AFB and Melrose AFR, initiated surveys for a Biological Inventory Study of a 10,968 acre area of land gifted to Melrose AFR by the state of New Mexico.
GMI to Support Fishermen's Energy with Environmental Impact Efforts
As part of the Energy Department's broader efforts to launch an offshore wind industry in the United States, GMI will support the Fishermen's Energy team with R&D for the advancement of traditional thermal and video imaging systems related to the assessment of nocturnal animal (bird, bat) occurrence, strikes and behavior around offshore wind turbines.
GMI Researchers Contribute to Texas Archaeological Literature
Nancy Kenmotsu is a co-editor and author of a new book published by Texas A&M University Press: The Toyah Phase of Central Texas: Late Prehistoric Economic and Social Processes. The volume is about the hunter-gatherers living in central Texas from AD 1300 – 1700.
Estabrook Heads Cultural Resources Dept.
Following 20+ years working as a Project/Program Manager for several of the largest cultural resources firms in Florida, Rich Estabrook has joined GMI as Cultural Resources Program Manager in the Plano corporate office.
Three-dimensional (3D) laser scanners are a class of instruments that record very precise and accurate surface data of objects in a non-destructive manner. Based on LiDAR technology, these instruments use an infrared beam of light to calculate and record the distance to an object, typically as data points with spatial coordinates. Given the speed of these instruments, large numbers of data points can be collected quickly and at a high sampling interval, or density, across the surface of an object to create a highly accurate 3D digital model. Sometimes referred to as High Definition Survey (HDS), several types of 3D laser scanners exist to digitize objects of various sizes ranging from small diagnostic artifacts to large, complex sites of monumental architecture.
Since 2000, GMI has utilized 3D laser scanning to quickly and accurately record archaeological sites, historic architecture, and artifacts as high definition 3D computer models. These models, in turn, can be used for a number of purposes including documentation, visualization, and analysis.
For more information on the application of 3D laser scanning to archaeology, historic preservation, cultural heritage studies, or cultural resources management, see GMI’s 3D Laser Scanning Projects Portfolio and 3D Laser Scanning for CRM or contact Christopher Goodmaster, 3D Laser Scanning Specialist.
Writing-On-Stone Provincial Park is located in south-central Alberta, Canada. The park protects the largest concentration of native rock art on the Great Plains.
GMI was subcontracted by the Royal Alberta Museum to conduct a small test of the feasibility of using a laser scanner device to record petroglyphs at Writing-On-Stone Provincial Park. Fieldwork was conducted over two days by a combined team of Geo-Marine, Royal Alberta Museum, and Parks Canada employees.
The petroglyphs selected for this trial project record the prehistoric/historical-period cultural transition of southern Alberta. Two panels used for the current study are located on large sandstone cliffs. One small replica panel was also scanned.
GMI used a Vivid 900 non-contact 3D digitizer to conduct the scanning. Because the petroglyphs at Writing-On-Stone were extremely shallow and faint, Geo-Marine, Inc., scanned the rock surface in dozens of small, high-resolution shots, and then produced a mosaic of all shots together to create an overall model.
Development and implementation of a three-dimensional digital database of 725 archaeological artifacts to facilitate cultural resources curation requirements at Fort Hood, Texas.
Three-dimensional scanning has the potential to alleviate a persistent problem in archaeology: the unavailability of artifacts to both researchers and the public. Artifacts that must be curated, stored, or repatriated can be recorded and used for digital comparative collections or educational material. Such data availability opens the door to better comparative analysis and public awareness. The project was successful in developing a three-dimensional digital database that improves the business process of curation so that research, Native American consultation efforts, and public education objectives are facilitated at Fort Hood.
GMI completed scan post-processing and integration, and basic solid modeling for these 3D visualization projects. Ten scans were done at the Seguin Creek site. Because the scans at Seguin Creek were done in tandem with professional surveying, the Seguin Creek model is completely georeferenced. Despite some vegetation removal, the preponderance of vegetation and debris makes solid modeling of this site challenging. However, by carefully decimating the data, an accurate and detailed contour map was generated.
Forty-eight scans were conducted of the Wilson County Bridge structure from a number of locations above, below, and on either side of the bridge. Two Cyrax units were used simultaneously at the site—one taking detail scans from a close range, and the other focusing on recording the overall structure. Four very close-range detail scans were done with a Minolta Vivid 900 at the bridge as well. These scans included two details of the Carnegie imprint on the steel beams, a load-bearing joint on the deck of the bridge, and a support articulation underneath the bridge. The project methodology was designed in order to thoroughly record the bridge structure such that all meaningful construction details would be identifiable. For example, model resolution was hoped to be of high enough quality to illustrate fasteners such as bolts. Recordation quality and completeness was intended to be great enough to serve as a basis for HAER Level I-type engineering drawings.