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Blue Marsh was the name of the village that was located where the lake now is, and locals called the area Pleasant Valley. It was the first settlement in Lower Heidelberg Township. The land was very fertile. It was also a heavily forested area with abundance of wildlife. There were many farms and 18th and 19th century homes.
Topographic maps display elevation above ground and are complementary to bathymetric charts. Bathymetric charts showcase depth using a series of lines and points at equal intervals, called depth contours or isobaths (a type of contour line). A closed shape with increasingly smaller shapes inside of it can indicate an ocean trench or a seamount ...
Nautical charts must be labeled with navigational and depth information. There are a few commercial software packages that do automatic label placement for any kind of map or chart. Modern systems render electronic charts consistent with the IHO S-52 specification, issued by the International Hydrographic Organization (IHO). [7]
SGL 274 consists of three parcels located in Bern, Penn, and Lower Heidelberg Townships in Berks County. Blue Marsh Lake, located between parcels of SGL 280, is part of the Tulpehocken Creek watershed, which is part of the watershed of the Schuylkill River and ultimately, the Delaware River.
A bathymetric chart is a type of isarithmic map that depicts the submerged bathymetry and physiographic features of ocean and sea bottoms. [1] Their primary purpose is to provide detailed depth contours of ocean topography as well as provide the size, shape and distribution of underwater features.
Sep. 22—Algae is still a concern at Blue Marsh Lake nearly a month after the swim beach was closed and visitors and their pets were advised to have no contact with the water on Aug. 26. Scott ...
This map is updated daily. Offline Map The map can also be loaded on local data storage and can be used on any PC without internet access. This map will also permit use on other devices, such as GPS devices from Garmin and Lowrance, phones, and PDAs. The off-map is regularly updated, usually every week. App for iPad, iPhone, iPod touch
The General Bathymetric Chart of the Oceans (GEBCO) is a publicly available bathymetric chart of the world's oceans. The project was conceived with the aim of preparing a global series of charts showing the general shape of the seafloor. Over the years it has become a reference map of the bathymetry of the world's oceans for scientists and others.