Island Pond (Rockingham County, New Hampshire) Island Pond (Rockingham County, New Hampshire) Island Pond (sometimes referred to locally as Big Island Pond) is a water body located in Rockingham County in southern New Hampshire, in the towns of Derry, Hampstead and Atkinson. The pond is near the head of the Spicket River watershed, which feeds the Merrimack River in Lawrence, Massachusetts. The pond was formed from the merger of two smaller bodies of water in 1878, when a dam raised the water level by 8.5 feet. The pond is named for Governor's Island, a island that lies within it. The island in turn is named for
SRTM Water Body Data tile of the Earth's surface. SWBD data is in the public domain and is made available online for free download by NASA. SRTM Water Body Data The SRTM Water Body Data (SWBD) is a geographical dataset (2003) encoding high-resolution worldwide coastline outlines in a vector format, published by NASA and designed for use in geographic information systems and mapping applications. It was created by BAE Systems ADR for the US National Geospatial-Intelligence Agency (NGA) as a complementary product during editing of the digital elevation model database of the Shuttle Radar Topography Mission (SRTM). SWBD data covers the Earth's surface between