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41-675: Coordinates : 42°29′00″N 73°18′4.5″W / 42.48333°N 73.301250°W / 42.48333; -73.301250 Protected area in Massachusetts, United States Pittsfield State Forest [REDACTED] Lulu Brook [REDACTED] [REDACTED] Location in Massachusetts Show map of Massachusetts [REDACTED] [REDACTED] Pittsfield State Forest (the United States) Show map of
82-543: A prime meridian at the westernmost known land, designated the Fortunate Isles , off the coast of western Africa around the Canary or Cape Verde Islands , and measured north or south of the island of Rhodes off Asia Minor . Ptolemy credited him with the full adoption of longitude and latitude, rather than measuring latitude in terms of the length of the midsummer day. Ptolemy's 2nd-century Geography used
123-466: A listing on the National Register of Historic Places or a designation as a National Historic Landmark . States and local zoning bodies may or may not choose to protect these. The state of Colorado , for example, is very clear that it does not set any limits on owners of NRHP properties. Federal protected area designations International protected area designations Every state has
164-679: A little before 1300; the text was translated into Latin at Florence by Jacopo d'Angelo around 1407. In 1884, the United States hosted the International Meridian Conference , attended by representatives from twenty-five nations. Twenty-two of them agreed to adopt the longitude of the Royal Observatory in Greenwich , England as the zero-reference line. The Dominican Republic voted against
205-416: A location often facetiously called Null Island . In order to use the theoretical definitions of latitude, longitude, and height to precisely measure actual locations on the physical earth, a geodetic datum must be used. A horizonal datum is used to precisely measure latitude and longitude, while a vertical datum is used to measure elevation or altitude. Both types of datum bind a mathematical model of
246-538: A longitudinal degree is 111.3 km. At 30° a longitudinal second is 26.76 m, at Greenwich (51°28′38″N) 19.22 m, and at 60° it is 15.42 m. On the WGS 84 spheroid, the length in meters of a degree of latitude at latitude ϕ (that is, the number of meters you would have to travel along a north–south line to move 1 degree in latitude, when at latitude ϕ ), is about The returned measure of meters per degree latitude varies continuously with latitude. Similarly,
287-700: A national cartographical organization include the North American Datum , the European ED50 , and the British OSGB36 . Given a location, the datum provides the latitude ϕ {\displaystyle \phi } and longitude λ {\displaystyle \lambda } . In the United Kingdom there are three common latitude, longitude, and height systems in use. WGS 84 differs at Greenwich from
328-671: A permit. Trails include the .5-mile (0.80 km), wheelchair-accessible Tranquility Trail as well as access to the 35-mile (56 km) Taconic Crest Trail . Camping: There are 32 sites for tents, pop-up, group, and standard non-electric camping. The forest also offers non-motorized boating and fishing on Berry Pond and restricted hunting. References [ edit ] ^ "2012 Acreage Listing" (PDF) . Department of Conservation and Recreation. April 2012 . Retrieved January 19, 2014 . ^ "Pittsfield State Forest" . Geographic Names Information System . United States Geological Survey , United States Department of
369-872: A simple translation may be sufficient. Datums may be global, meaning that they represent the whole Earth, or they may be local, meaning that they represent an ellipsoid best-fit to only a portion of the Earth. Examples of global datums include World Geodetic System (WGS 84, also known as EPSG:4326 ), the default datum used for the Global Positioning System , and the International Terrestrial Reference System and Frame (ITRF), used for estimating continental drift and crustal deformation . The distance to Earth's center can be used both for very deep positions and for positions in space. Local datums chosen by
410-401: A system of state parks as well as many other types of protected areas (forests, reserves, refuges, recreation areas, etc.). State parks vary widely from urban parks to very large parks that are on a par with national parks. Some state parks, like Adirondack Park , are similar to the national parks of England and Wales , with numerous towns inside the borders of the park. About half the area of
451-503: A year, or 10 m in a century. A weather system high-pressure area can cause a sinking of 5 mm . Scandinavia is rising by 1 cm a year as a result of the melting of the ice sheets of the last ice age , but neighboring Scotland is rising by only 0.2 cm . These changes are insignificant if a local datum is used, but are statistically significant if a global datum is used. On the GRS 80 or WGS 84 spheroid at sea level at
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#1732772324259492-586: Is where Earth's equatorial radius a {\displaystyle a} equals 6,378,137 m and tan β = b a tan ϕ {\displaystyle \textstyle {\tan \beta ={\frac {b}{a}}\tan \phi }\,\!} ; for the GRS 80 and WGS 84 spheroids, b a = 0.99664719 {\textstyle {\tfrac {b}{a}}=0.99664719} . ( β {\displaystyle \textstyle {\beta }\,\!}
533-418: Is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude . It is the simplest, oldest and most widely used of the various spatial reference systems that are in use, and forms the basis for most others. Although latitude and longitude form a coordinate tuple like a cartesian coordinate system , the geographic coordinate system
574-630: Is an 11,000-acre (4,500 ha) Massachusetts state forest located in the town of Pittsfield and managed by the Department of Conservation and Recreation . The forest is the location of Berry Pond, which sitting atop Berry Mountain at an elevation of 2,150 feet (660 m) is the highest natural body of water in the state. Activities and amenities [ edit ] Trails: There are more than 30 miles (48 km) of trails available for hiking, walking, mountain biking, horseback riding, and cross-country skiing. Off-road vehicle usage requires
615-694: Is known as the reduced (or parametric) latitude ). Aside from rounding, this is the exact distance along a parallel of latitude; getting the distance along the shortest route will be more work, but those two distances are always within 0.6 m of each other if the two points are one degree of longitude apart. Like any series of multiple-digit numbers, latitude-longitude pairs can be challenging to communicate and remember. Therefore, alternative schemes have been developed for encoding GCS coordinates into alphanumeric strings or words: These are not distinct coordinate systems, only alternative methods for expressing latitude and longitude measurements. Protected areas of
656-544: Is not cartesian because the measurements are angles and are not on a planar surface. A full GCS specification, such as those listed in the EPSG and ISO 19111 standards, also includes a choice of geodetic datum (including an Earth ellipsoid ), as different datums will yield different latitude and longitude values for the same location. The invention of a geographic coordinate system is generally credited to Eratosthenes of Cyrene , who composed his now-lost Geography at
697-753: Is the angle east or west of a reference meridian to another meridian that passes through that point. All meridians are halves of great ellipses (often called great circles ), which converge at the North and South Poles. The meridian of the British Royal Observatory in Greenwich , in southeast London, England, is the international prime meridian , although some organizations—such as the French Institut national de l'information géographique et forestière —continue to use other meridians for internal purposes. The prime meridian determines
738-405: Is ultimately calculated from latitude and longitude, it is crucial that they clearly state the datum on which they are based. For example, a UTM coordinate based on WGS84 will be different than a UTM coordinate based on NAD27 for the same location. Converting coordinates from one datum to another requires a datum transformation such as a Helmert transformation , although in certain situations
779-494: The Library of Alexandria in the 3rd century BC. A century later, Hipparchus of Nicaea improved on this system by determining latitude from stellar measurements rather than solar altitude and determining longitude by timings of lunar eclipses , rather than dead reckoning . In the 1st or 2nd century, Marinus of Tyre compiled an extensive gazetteer and mathematically plotted world map using coordinates measured east from
820-709: The United Nations Environment Programme , the U.S. had a total of 6,770 terrestrial nationally designated (federal) protected areas. Federal level protected areas are managed by a variety of agencies, most of which are a part of the National Park Service , a bureau of the United States Department of the Interior . They are often considered the crown jewels of the protected areas. Other areas are managed by
861-822: The United States Forest Service , the Bureau of Land Management and the United States Fish and Wildlife Service . The United States Army Corps of Engineers is claimed to provide 30 percent of the recreational opportunities on federal lands, mainly through lakes and waterways that they manage. The highest levels of protection, as described by the International Union for Conservation of Nature (IUCN), are Level I (Strict Nature Reserves & Wilderness Areas) and Level II (National Parks). The United States maintains 12 percent of
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#1732772324259902-1042: The Environment Lynn Woods Reservation Norcross Wildlife Sanctuary Old Harbor Wildlife Refuge [REDACTED] Category Boston Emerald Necklace Executive Office of Energy and Environmental Affairs [REDACTED] Commons Retrieved from " https://en.wikipedia.org/w/index.php?title=Pittsfield_State_Forest&oldid=1113616805 " Categories : Massachusetts state forests Protected areas of Berkshire County, Massachusetts Campgrounds in Massachusetts Hidden categories: Pages using gadget WikiMiniAtlas Articles with short description Short description matches Wikidata Coordinates on Wikidata Geographic coordinate system A geographic coordinate system ( GCS )
943-512: The Equator, one latitudinal second measures 30.715 m , one latitudinal minute is 1843 m and one latitudinal degree is 110.6 km. The circles of longitude, meridians, meet at the geographical poles, with the west–east width of a second naturally decreasing as latitude increases. On the Equator at sea level, one longitudinal second measures 30.92 m, a longitudinal minute is 1855 m and
984-497: The Interior . ^ "Pittsfield State Forest" . MassParks . Executive Office of Energy and Environmental Affairs . Retrieved July 23, 2013 . ^ "Tranquility Trail" (PDF) . MassParks: Pittsfield State Forest . Executive Office of Energy and Environmental Affairs . Retrieved July 23, 2013 . ^ "Pittsfield State Forest" . Reserve America . Retrieved July 23, 2013 . ^ "Pittsfield State Forest" . The BerkshireWeb. Archived from
1025-647: The Level I and II lands in the world. These lands had a total area of 210,000 sq mi (540,000 km ). Because U.S. federal protected areas include both ownership based names, and names related to overlaying policy designations, the naming system for U.S. protected areas results in some types being used by more than one agency. For instance, both the National Park Service and the U.S. Forest Service manage areas designated National Preserves and National Recreation Areas . The National Park Service,
1066-659: The U.S. Forest Service, and the Bureau of Land Management manage areas called national monuments . National Wilderness Areas are designated within other protected areas, managed by various agencies and sometimes wilderness areas span areas managed by multiple agencies. Those relying on U.S. protected areas data are advised to learn more about all of these conventions by reviewing the extensive PAD-US Help system . There are existing federal designations of historic or landmark status that may support preservation via tax incentives, but that do not necessarily convey any protection, including
1107-615: The United States Location Pittsfield , Berkshire , Massachusetts, United States Coordinates 42°29′00″N 73°18′4.5″W / 42.48333°N 73.301250°W / 42.48333; -73.301250 Main entrance Area 10,601 acres (42.90 km) Elevation 1,936 ft (590 m) Established Unspecified Governing body Massachusetts Department of Conservation and Recreation Website Pittsfield State Forest Pittsfield State Forest
1148-552: The United States The protected areas of the United States are managed by an array of different federal, state, tribal and local level authorities and receive widely varying levels of protection. Some areas are managed as wilderness , while others are operated with acceptable commercial exploitation . As of 2022 , the 42,826 protected areas covered 1,235,486 km (477,024 sq mi), or 13 percent of
1189-464: The far western Aleutian Islands . The combination of these two components specifies the position of any location on the surface of Earth, without consideration of altitude or depth. The visual grid on a map formed by lines of latitude and longitude is known as a graticule . The origin/zero point of this system is located in the Gulf of Guinea about 625 km (390 mi) south of Tema , Ghana ,
1230-719: The land area of the United States . This is also one-tenth of the protected land area of the world. The U.S. also had a total of 871 National Marine Protected Areas , covering an additional 1,240,000 sq mi (3,200,000 km ), or 26 percent of the total marine area of the United States. Federal protected areas include lands and waters owned outright ("Fee ownerships"), as well as areas that are secured by easements, leases, etc. In addition to ownership-defined areas, there are numerous overlaying policy designations that apply management protections and use conditions on all or some of individual protected areas (e.g., Wilderness Areas, National Monuments, etc.). As of 2007 , according to
1271-415: The length in meters of a degree of longitude can be calculated as (Those coefficients can be improved, but as they stand the distance they give is correct within a centimeter.) The formulae both return units of meters per degree. An alternative method to estimate the length of a longitudinal degree at latitude ϕ {\displaystyle \phi } is to assume a spherical Earth (to get
Pittsfield State Forest - Misplaced Pages Continue
1312-481: The motion, while France and Brazil abstained. France adopted Greenwich Mean Time in place of local determinations by the Paris Observatory in 1911. The latitude ϕ of a point on Earth's surface is the angle between the equatorial plane and the straight line that passes through that point and through (or close to) the center of the Earth. Lines joining points of the same latitude trace circles on
1353-523: The one used on published maps OSGB36 by approximately 112 m. The military system ED50 , used by NATO , differs from about 120 m to 180 m. Points on the Earth's surface move relative to each other due to continental plate motion, subsidence, and diurnal Earth tidal movement caused by the Moon and the Sun. This daily movement can be as much as a meter. Continental movement can be up to 10 cm
1394-17221: The original on May 10, 2008 . Retrieved July 23, 2013 . External links [ edit ] Pittsfield State Forest Department of Conservation and Recreation Pittsfield State Forest Trail Map Department of Conservation and Recreation v t e Protected areas of Massachusetts Federal National Historical Parks Adams Blackstone River Valley Boston Lowell Minute Man New Bedford Whaling National Historic Sites Boston African American Frederick Law Olmsted John Fitzgerald Kennedy Longfellow House–Washington's Headquarters Salem Maritime Saugus Iron Works Springfield Armory Other National Park Service units Appalachian National Scenic Trail Boston Harbor Islands National Recreation Area Cape Cod National Seashore National Wildlife Refuges Assabet River Great Meadows Mashpee Massasoit Monomoy Nantucket Nomans Land Oxbow Parker River Silvio O. Conte Thacher Island Wild and Scenic Rivers Assabet Concord Sudbury Taunton Westfield Other protected areas Stellwagen Bank National Marine Sanctuary Waquoit Bay National Estuarine Research Reserve West Hill Dam ( USACE ) State parks Parks Alewife Brook Ames Nowell Ashland Bash Bish Falls Blackstone River and Canal Heritage Borderland Boston Harbor Islands Bradley Palmer C. M. Gardner Callahan Castle Island State Park Chicopee Memorial City Square Clarksburg Cochituate Connecticut River Greenway Demarest Lloyd Dighton Rock Dunn Ellisville Harbor Fall River Heritage Gardner Heritage Governor Thomas Dudley Great Brook Farm Greycourt Halibut Point Hampton Ponds Holyoke Heritage Hopkinton Lake Lorraine Lake Wyola Lawrence Heritage Lowell Heritage Lynn Heritage Massasoit Maudslay Moore Mount Holyoke Range Natural Bridge Nickerson Pearl Hill Pilgrim Quinsigamond Robinson Roxbury Heritage Rutland Skinner South Cape Beach Wahconah Falls Webb Memorial Wells Western Gateway Heritage Whitehall Wompatuck Reservations Beaver Brook Belle Isle Marsh Blue Hills Breakheart Charles River Chestnut Hill Cutler Dorchester Shores Elm Bank Fort Phoenix Hammond Pond Hemlock Gorge Horseneck Beach Jug End Lynn Shore Middlesex Fells Mount Everett Mount Greylock Mount Sugarloaf Mount Tom Myles Standish Mystic River Nahant Beach Nantasket Beach Nasketucket Bay Neponset River Pope John Paul II Purgatory Chasm Quincy Quarries Quincy Shore Revere Beach Rumney Marsh Salisbury Beach Sandy Point Scusset Beach Stony Brook Upper Charles River Wachusett Mountain Walden Pond West Island Weymouth Wilson Mountain Other Appalachian Trail Ashuwillticook Rail Trail Cape Cod Rail Trail Fort Revere Lake Dennison Recreation Area Lower Neponset River Trail Mass Central Rail Trail—Wayside Nashua River Rail Trail Norwottuck Branch Rail Trail Quabbin Reservoir Southwest Corridor Park Squantum Point Park Streeter Point Recreation Area Sudbury Reservoir Wachusett Reservoir Ware River Watershed Area State forests Barnstable Beartown Berkley Billerica Brimfield Chester-Blandford DAR Douglas Erving F. Gilbert Hills Federated Women's Club Franklin Freetown-Fall River Georgetown-Rowley Gilbert A. Bliss Granville Harold Parker Kenneth Dubuque Memorial Leominster Lowell-Dracut-Tyngsboro Manuel F. Correllus Mohawk Trail Monroe Mount Grace Mount Washington Myles Standish October Mountain Otter River Pittsfield Sandisfield Savoy Mountain Shawme-Crowell South River Spencer Tolland Upton Warren H. Manning Wendell Willard Brook Willowdale Windsor Wildlife management areas Wildlife management areas Agawam Lake Agawam Mill Pond Ashby Ashfield Hawley Attitash Ayer Game Farm Baddacook Pond Bakers Pond Bay Circuit Trail Bearse Pond Becket Bennett Birch Hill Black Brook Blackstone / West River Bolton Flats Boxboro Station Brayton Point Salt Marsh Breakneck Brook Brewer Brook Bullock Ledge Burrage Pond Canoe River Catamount Chalet Chase Garden Creek Salt Marsh Childs River Chockalog Swamp Church Homestead Clapps Pond Clinton Bluff Concord River Connecticut River Cook Pond Copicut Coy Hill Crane Pond Cummington Cusky Pond Dartmoor Farm Darwin Scott Memorial Day Mountain Deerfield River Dogfish Bar Beach Coastal Dolomite Ledges Dunstable Brook E. Kent Swift Eagle Island East Mountain Eastham Salt Marsh Elbow Meadow English Salt Marsh Eugene D. Moran Facing Rock Fairfield Brook Farmington River Fish Brook Fisherville Pond Fisk Forestdale Lot Fisk Meadows Five Mile River Flagg Swamp Flint Pond Four Chimneys Fox Den Fox Island Salt Marsh Frances A. Crane George L. Darey Housatonic Valley Glen Echo Lake Gosnold Grassy Pond (Dennis) Grassy Pond (Plymouth) Green River Access (Franklin County) Green River (Berkshire County) Greenfield River Halfway Pond Hamilton Hancock Harlow / Cooks Pond Haskell Swamp Hauk Swamp Hawksnest State Park Hawley Head Of The Plains Herman Covey High Ridge Hinsdale Flats Hiram H. Fox Hockomock Swamp Hog Pond Lot Honey Pot Hoosatonic River Hoosic River Hop Brook Housatonic River Hubbard Brook Hunting Hills Hyannis Ponds Ipswich River John J. Kelly Joint Base Cape Cod Jug End Jug End Fen Kampoosa Fen Katama Plains Knops Pond Konkapot River Lackey Pond Lake Lorraine Lake Rohunta Lake Snipatuit Lake Warner Lanesboro Lawrence Brook Lawrence Pond Lot Leadmine Leyden Lilly Pond Little Alum Pond Long Sought For Pond Maple Hill Maple Springs Martha Deering Martin H. Burns Mascuppic Lake Mashpee Pine Barrens Mashpee Pond Lot Mashpee River Mckinstry Brook Meetinghouse Swamp Merrill Pond Miacomet Heath Mill Brook Bogs Mill River Millers River Mine Brook Montague Montague Plains Moose Brook Access Moose Brook Moose Hill Mossy Pond Mount Watatic Reservation Mt. Esther Mt. Toby Highlands Mt. Toby Mt. Tom Muddy Brook Muddy Pond Mulpus Brook Nashua River Natty Brook Nemasket River Nissitissit River Noquochoke Nordeen Marsh North Brookfield North Shore Salt Marsh Northboro Oakham Olivers Pond Orange Otis Packard Pond Palmer Pantry Brook Pauchaug Brook Peru Peterson Swamp Phillipston Podunk Marsh Poland Brook Popple Camp Popponesset Spit Poutwater Pond Powell Brook Prince River Provincetown Route 6 Corridor Purchade Brook Quaboag Quacumquasit Quag Pond Bog Quashnet River Quashnet Woods State Reservation Quinapoxet River Quinsigamond Marsh Quisset Raccoon Hill Rainbow Beach Red Brook Richardson Robbins Pond Rochester Rocky Gutter Rowe Salisbury Salt Marsh Salisbury Salt Marsh WMA Sandwich Game Farm Sandy Pond Satan's Kingdom Savage Hill Savoy Sawmill River Scorton Creek Coastal SE Mass Bioreserve Sevenmile River Shattuck Brook Sheperds Island Shubael Pond Sibley Brook Sly Pond South Barrier Beach South Meadow Pond South Shore Salt Marsh South Triangle Pond Southampton Southwick Spectacle Pond Springhill Lot Sputtermill Pond Squannacook River Stafford Hill Sudbury River Sunderland Islands Taconic Mountain Taunton River Access Taunton River Tekoa Mountain Thad Ellis Thayer Pond Three Mile Pond Townsend Townsend Hill Trapfall Brook Triangle Pond Tully Brook Tully Mountain Tully River Wakeby Pond Wales Walnut Hill Ware River Warwick Wendell West Meadows Westboro Westfield River Westfield Weymouth Back River Whately Great Swamp Whately Ponds Whately Wilbraham Game Farm William Forward Williams River Williamsburg Winimusset Wolf Swamp Wildlife sanctuaries Billingsgate Island Carr Island E. Howe Forbush Egg Rock Grace A. Robson J.C. Phillips Knight Penikese Island Ram Island (Mattapoisett) Ram Island (Salisbury) Susan B. Minns Tarpaulin Cove Watatic Mountain The Nature Conservancy Black Pond Bog Boat Meadow Francis Newhall Woods Grassy Pond Greene Swamp Halfway Pond Island Hawley Bog Hockomock Swamp Hoft Farm Homer-Watcha Katama Plains McElwain-Olsen Miacomet Moors Reed Brook Roger and Virginia Drury Sandy Neck David H. Smith Preserve and Fire Trail Stacy Mountain Tatkon Trustees of Reservations Governor Oliver Ames Estate Appleton Farms Ashintully Gardens Bartholomew's Cobble Bear Swamp Bear's Den Boston Community Gardens The Brickyard Bullitt Chestnut Hill Farm Colonel John Ashley House Dunes' Edge Campground Francis William Bird Park Eleanor Cabot Bradley Estate Bridge Island Meadows Brooks Woodland William Cullen Bryant Homestead Cape Poge Cedariver Castle Hill Chapel Brook Charles River Peninsula Chase Woodlands Chesterfield Gorge Coolidge Copicut Woods Cormier Woods Coskata-Coatue Wildlife Refuge Crane Beach Crane Wildlife Refuge Crowninshield Island Dexter Drumlin Dinosaur Footprints Doane's Falls Doyle Dry Hill East Over Elliott Laurel Farandnear FARM Institute Field Farm Fruitlands Museum Fork Factory Brook Glendale Falls Goose Pond Greenwood Farm Hales Brook and Sippican River Halibut Point Hamlin Allen C. Haskell Public Gardens Holmes Governor Hutchinson's Field Jacobs Hill Little Tom Mountain Land of Providence Leatherbee Woods Long Hill Long Point Lowell Holly Lyman Malcolm Mashpee River McLennan Medfield Meadow Lots Medfield Rhododendrons Menemsha Hills and The Brickyard Misery Islands Mission House The Monoliths Monument Mountain Moose Hill Farm Moraine Farm Mount Ann Mount Warner Mountain Meadow Mytoi Naumkeag Noanet Woodlands Noon Hill and Shattuck Norris North Common Meadow Norton Point Beach Notchview Old Manse Old Town Hill Peaked Mountain Pegan Hill Peters Petticoat Hill Pierce Pine and Hemlock Knoll Powisset Farm Questing Quinebaug Woods Ravenswood Park Redemption Rock Rock House Rocky Narrows Rocky Woods Royalston Falls Shattuck Signal Hill Slocum's River Stavros Stevens-Coolidge Swift River Tantiusques Tully Lake Campground Two Mile Farm Tyringham Cobble Ward Wasque Weir Hill Weir River Farm Westport Town Farm Whitney and Thayer Woods World's End Audubon Society wildlife sanctuaries Allens Pond Arcadia Ashumet Holly Attleboro Springs Barnstable Great Marsh Blue Hills Trailside Museum Boston Nature Center Broad Meadow Brook Broadmoor Burncoat Pond Canoe Meadows Daniel Webster Drumlin Farm Eagle Lake Eastern Point Endicott Felix Neck Flat Rock Graves Farm Great Neck Habitat High Ledges Ipswich River Joppa Flats Kettle Island Lake Wampanoag Laughing Brook Lime Kiln Farm Lincoln Woods Long Pasture Lynes Woods Marblehead Neck Moose Hill Museum of American Bird Art Nahant Thicket Nashoba Brook North Hill Marsh North River Oak Knoll Pierpont Meadow Pleasant Valley Poor Farm Hill Richardson Brook Road's End Rough Meadows Rutland Brook Sampsons Island Sesachacha Heathlands Skunknett River Stony Brook Wachusett Meadow Waseeka Wellfleet Bay Wildwood Camp Other Concord Land Conservation Trust Harvard Forest Lincoln Land Conservation Trust Lloyd Center for
1435-681: The park, some 3,000,000 acres (1,200,000 ha), is state-owned and preserved as "forever wild" by the Forest Preserve of New York . Wood-Tikchik State Park in Alaska is the largest state park by the amount of contiguous protected land; it is larger than many U.S. National Parks, with some 1,600,000 acres (650,000 ha), making it larger than the state of Delaware . Many states also operate game and recreation areas. U.S. counties, cities and towns, metropolitan authorities, regional park systems , recreation districts and other units manage
1476-535: The proper Eastern and Western Hemispheres , although maps often divide these hemispheres further west in order to keep the Old World on a single side. The antipodal meridian of Greenwich is both 180°W and 180°E. This is not to be conflated with the International Date Line , which diverges from it in several places for political and convenience reasons, including between far eastern Russia and
1517-430: The same datum will obtain the same location measurement for the same physical location. However, two different datums will usually yield different location measurements for the same physical location, which may appear to differ by as much as several hundred meters; this not because the location has moved, but because the reference system used to measure it has shifted. Because any spatial reference system or map projection
1558-664: The same prime meridian but measured latitude from the Equator instead. After their work was translated into Arabic in the 9th century, Al-Khwārizmī 's Book of the Description of the Earth corrected Marinus' and Ptolemy's errors regarding the length of the Mediterranean Sea , causing medieval Arabic cartography to use a prime meridian around 10° east of Ptolemy's line. Mathematical cartography resumed in Europe following Maximus Planudes ' recovery of Ptolemy's text
1599-486: The shape of the earth (usually a reference ellipsoid for a horizontal datum, and a more precise geoid for a vertical datum) to the earth. Traditionally, this binding was created by a network of control points , surveyed locations at which monuments are installed, and were only accurate for a region of the surface of the Earth. Some newer datums are bound to the center of mass of the Earth. This combination of mathematical model and physical binding mean that anyone using
1640-464: The surface of Earth called parallels , as they are parallel to the Equator and to each other. The North Pole is 90° N; the South Pole is 90° S. The 0° parallel of latitude is designated the Equator , the fundamental plane of all geographic coordinate systems. The Equator divides the globe into Northern and Southern Hemispheres . The longitude λ of a point on Earth's surface
1681-445: The width per minute and second, divide by 60 and 3600, respectively): where Earth's average meridional radius M r {\displaystyle \textstyle {M_{r}}\,\!} is 6,367,449 m . Since the Earth is an oblate spheroid , not spherical, that result can be off by several tenths of a percent; a better approximation of a longitudinal degree at latitude ϕ {\displaystyle \phi }