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TwitterThese data were automated to provide an accurate high-resolution historical shoreline of Cape Henlopen to Rehoboth Bay, DE suitable as a geographic information system (GIS) data layer. These data are derived from shoreline maps that were produced by the NOAA National Ocean Service including its predecessor agencies which were based on an office interpretation of imagery and/or field survey....
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TwitterDuring the spring of 1999, the Delaware Coastal Programs(DCP) identified the spatial extent of macroalgae in the shallow portions of Rehoboth Bay utilizing traditional photogrammetric methods. The DCP used true color aerial photographs, image processing software, a geographical information system (GIS), and a limited field survey to identify 1.88 square kilometers of macroalgae in all but the deepest parts of the bay. Turbid conditions prevented identification of the full extent of the vegetation.Although the 1999 effort was highly successful, it was clear that aerial photography could not penetrate to the deeper parts of the bay or where conditions were turbid.For the 2000 effort, the DCP partnered with the National Oceanic and Atmospheric Administration (NOAA) Office for Coastal Management Coastal Remote Sensing Program. The Benthic Habitat Mapping project, a part of the Center's Coastal Remote Sensing program, utilized a RoxAnn acoustic sensor to identify benthic cover in turbid areas of the bay June 12- 16, 2000.The instrument was used to identify bottom type by extracting data on bottom roughness and bottom hardness from the primary and secondary sounder echoes. The data is classified on-the-fly, using a towed video camera for field validation, and subject to a post-processing classification. The unit collected data throughout the bay in areas greater than 1.4 meters in depth and serves as a powerful complement to the aerial photography. The RoxAnn data points were exported into a geographic information system (GIS) and post-processed to remove unreliable data points and re-classified. This data set is comprised of the cleaned, attributed point data. The attributes include location, date, time, depth, field derived classification,and the classification derived from post-processing the data. This system is fully described in "Development of a System for Classification of Habitats in Estuarine and Marine Environments (SCHEME) for Florida, Report to U.S. EPA - Gulf of Mexico Program, Florida Fish and Wildlife Conservation Commission, Florida Marine Research Institute.Review Draft 12/04/02." Original contact information: Contact Org: NOAA Office for Coastal Management Phone: 843-740-1202 Email: coastal.info@noaa.gov
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Take a looks at the Harvard Map Collection's interactive exhibit 'Manuscript Maps,' which explores the library's extraordinary collection of hand-drawn manuscript maps.Behind every manuscript map lies an individual’s hand. Unlike printed maps, where a combination of drafting, engraving, and printing distances particular sheets from the people who produced them, manuscript maps carry the pressure and movement of individual bodies. The weight of these individual bodies interweave the stories of individuals with the material lives of the maps themselves. In a nautical chart made of the Fiji islands, we can follow the path of the ship Sally to see the human cost of a short boom in the Sandalwood trade; in a draft of a map of US railroad systems, we can imagine a cartographer’s frustrations when we see the demands a never-satisfied author has made in the margins; in a survey of the property of the late Philip Wheeler in Rehoboth, Massachusetts, we can feel the cold of a New England day in late December on the surveyor’s hands as he divided the land for Wheeler’s wife and heirs. Each map invites you into the world—as big as the earth or as small as a backyard—that someone laid out by hand.These stories often begin before ink was put to paper and have continued long after that ink has dried. Most of these maps rely on previous models, whether someone has traced, copied, transferred, or improved that original map. As individuals trace, copy, and amend the maps in front of them, they graft their own lives into stories of their maps. As murky as their origins can be, their futures are no clearer. When, after all, is a manuscript finished? We would struggle to distinguish a line or a legend added a day, a week, a month, maybe even a year after the initial marks on a map from two hundred years ago. These manuscripts point to a moment in a story that radiates into both past and future.These hazy beginnings and endings invite us into the ongoing life stories of these manuscripts as we discover the many lives that touch them.
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TwitterThese data were automated to provide an accurate high-resolution historical shoreline of Cape Henlopen to Rehoboth Bay, DE suitable as a geographic information system (GIS) data layer. These data are derived from shoreline maps that were produced by the NOAA National Ocean Service including its predecessor agencies which were based on an office interpretation of imagery and/or field survey....