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Location Folder Show Tree ROOT ScienceBase Catalog Users Filters Date Types (for Date Range) Extensions Citation (5) Contacts U.S. Geological Survey, National Geospatial Technical Operations Center U.S. Geological Survey Rick Camp Abigail L Benson Jason Dunham More... Categories Publication (5) Tag Types Place (49) Theme (49) Tag Schemes Geographic Names Information System (48) None (49) ISO 19115 Topic Category (49) The National Map Collection Thesaurus (48) The National Map Product Extent Thesaurus (48) The National Map Product Format Thesaurus (48) The National Map Theme Thesaurus (48) More... View Results as: JSON ATOM CSV Browse Folder

USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Barbour, Berkeley, Boone, Boundaries, Braxton, All tags... Brooke, Cabell, Calhoun, Clay, Doddridge, Downloadable Data, Esri Shapefile nan, Fayette, Gilmer, Grant, Greenbrier, Hampshire, Hancock, Hardy, Harrison, Jackson, Jefferson, Kanawha, Lewis, Lincoln, Logan, Map Indices, Map Indices, Map Indices, Marion, Marshall, Mason, McDowell, Mercer, Mineral, Mingo, Monongalia, Monroe, Morgan, Nicholas, Ohio, Pendleton, Pleasants, Pocahontas, Preston, Putnam, Raleigh, Randolph, Ritchie, Roane, Shapefile, State, State, Summers, Taylor, Tucker, Tyler, US, United States, United States of America, Upshur, WV, Wayne, Webster, West Virginia, Wetzel, Wirt, Wood, Wyoming, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Albany, Allegany, Boundaries, Bronx, Broome, All tags... Cattaraugus, Cayuga, Chautauqua, Chemung, Chenango, Clinton, Columbia, Cortland, Delaware, Downloadable Data, Dutchess, Erie, Esri Shapefile nan, Essex, Franklin, Fulton, Genesee, Greene, Hamilton, Herkimer, Jefferson, Kings, Lewis, Livingston, Madison, Map Indices, Map Indices, Map Indices, Monroe, Montgomery, NY, Nassau, New York, New York, Niagara, Oneida, Onondaga, Ontario, Orange, Orleans, Oswego, Otsego, Putnam, Queens, Rensselaer, Richmond, Rockland, Saratoga, Schenectady, Schoharie, Schuyler, Seneca, Shapefile, St. Lawrence, State, State, Steuben, Suffolk, Sullivan, Tioga, Tompkins, US, Ulster, United States, United States of America, Warren, Washington, Wayne, Westchester, Wyoming, Yates, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Adams, Ashland, Barron, Bayfield, Boundaries, All tags... Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Downloadable Data, Dunn, Eau Claire, Esri Shapefile nan, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Map Indices, Map Indices, Map Indices, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shapefile, Shawano, Sheboygan, St. Croix, State, State, Taylor, Trempealeau, US, United States, United States of America, Vernon, Vilas, WI, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wisconsin, Wood, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Boundaries, DE, Delaware, Downloadable Data, Esri Shapefile nan, All tags... Kent, Map Indices, Map Indices, Map Indices, New Castle, Shapefile, State, State, Sussex, US, United States, United States of America, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Barnstable, Berkshire, Boundaries, Bristol, Downloadable Data, All tags... Dukes, Esri Shapefile nan, Essex, Franklin, Hampden, Hampshire, MA, Map Indices, Map Indices, Map Indices, Massachusetts, Middlesex, Nantucket, Norfolk, Plymouth, Shapefile, State, State, Suffolk, US, United States, United States of America, Worcester, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Boundaries, Downloadable Data, Esri Shapefile nan, HI, Hawaii, All tags... Hawaii, Honolulu, Kalawao, Kauai, Map Indices, Map Indices, Map Indices, Maui, Shapefile, State, State, US, United States, United States of America, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Anderson, Andrews, Angelina, Aransas, Archer, All tags... Armstrong, Atascosa, Austin, Bailey, Bandera, Bastrop, Baylor, Bee, Bell, Bexar, Blanco, Borden, Bosque, Boundaries, Bowie, Brazoria, Brazos, Brewster, Briscoe, Brooks, Brown, Burleson, Burnet, Caldwell, Calhoun, Callahan, Cameron, Camp, Carson, Cass, Castro, Chambers, Cherokee, Childress, Clay, Cochran, Coke, Coleman, Collin, Collingsworth, Colorado, Comal, Comanche, Concho, Cooke, Coryell, Cottle, Crane, Crockett, Crosby, Culberson, Dallam, Dallas, Dawson, DeWitt, Deaf Smith, Delta, Denton, Dickens, Dimmit, Donley, Downloadable Data, Duval, Eastland, Ector, Edwards, El Paso, Ellis, Erath, Esri Shapefile nan, Falls, Fannin, Fayette, Fisher, Floyd, Foard, Fort Bend, Franklin, Freestone, Frio, Gaines, Galveston, Garza, Gillespie, Glasscock, Goliad, Gonzales, Gray, Grayson, Gregg, Grimes, Guadalupe, Hale, Hall, Hamilton, Hansford, Hardeman, Hardin, Harris, Harrison, Hartley, Haskell, Hays, Hemphill, Henderson, Hidalgo, Hill, Hockley, Hood, Hopkins, Houston, Howard, Hudspeth, Hunt, Hutchinson, Irion, Jack, Jackson, Jasper, Jeff Davis, Jefferson, Jim Hogg, Jim Wells, Johnson, Jones, Karnes, Kaufman, Kendall, Kenedy, Kent, Kerr, Kimble, King, Kinney, Kleberg, Knox, La Salle, Lamar, Lamb, Lampasas, Lavaca, Lee, Leon, Liberty, Limestone, Lipscomb, Live Oak, Llano, Loving, Lubbock, Lynn, Madison, Map Indices, Map Indices, Map Indices, Marion, Martin, Mason, Matagorda, Maverick, McCulloch, McLennan, McMullen, Medina, Menard, Midland, Milam, Mills, Mitchell, Montague, Montgomery, Moore, Morris, Motley, Nacogdoches, Navarro, Newton, Nolan, Nueces, Ochiltree, Oldham, Orange, Palo Pinto, Panola, Parker, Parmer, Pecos, Polk, Potter, Presidio, Rains, Randall, Reagan, Real, Red River, Reeves, Refugio, Roberts, Robertson, Rockwall, Runnels, Rusk, Sabine, San Augustine, San Jacinto, San Patricio, San Saba, Schleicher, Scurry, Shackelford, Shapefile, Shelby, Sherman, Smith, Somervell, Starr, State, State, Stephens, Sterling, Stonewall, Sutton, Swisher, TX, Tarrant, Taylor, Terrell, Terry, Texas, Throckmorton, Titus, Tom Green, Travis, Trinity, Tyler, US, United States, United States of America, Upshur, Upton, Uvalde, Val Verde, Van Zandt, Victoria, Walker, Waller, Ward, Washington, Webb, Wharton, Wheeler, Wichita, Wilbarger, Willacy, Williamson, Wilson, Winkler, Wise, Wood, Yoakum, Young, Zapata, Zavala, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Albany, Big Horn, Boundaries, Campbell, Carbon, All tags... Converse, Crook, Downloadable Data, Esri Shapefile nan, Fremont, Goshen, Hot Springs, Johnson, Laramie, Lincoln, Map Indices, Map Indices, Map Indices, Natrona, Niobrara, Park, Platte, Shapefile, Sheridan, State, State, Sublette, Sweetwater, Teton, US, Uinta, United States, United States of America, WY, Washakie, Weston, Wyoming, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Addison, Bennington, Boundaries, Caledonia, Chittenden, All tags... Downloadable Data, Esri Shapefile nan, Essex, Franklin, Grand Isle, Lamoille, Map Indices, Map Indices, Map Indices, Orange, Orleans, Rutland, Shapefile, State, State, US, United States, United States of America, VT, Vermont, Washington, Windham, Windsor, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Allegany, Anne Arundel, Baltimore, Boundaries, Calvert, All tags... Caroline, Carroll, Cecil, Charles, Dorchester, Downloadable Data, Esri Shapefile nan, Frederick, Garrett, Harford, Howard, Kent, MD, Map Indices, Map Indices, Map Indices, Maryland, Montgomery, Prince George's, Queen Anne's, Shapefile, Somerset, St. Mary's, State, State, Talbot, US, United States, United States of America, Washington, Wicomico, Worcester, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Adams, Alexander, Bond, Boone, Boundaries, All tags... Brown, Bureau, Calhoun, Carroll, Cass, Champaign, Christian, Clark, Clay, Clinton, Coles, Cook, Crawford, Cumberland, De Witt, DeKalb, Douglas, Downloadable Data, DuPage, Edgar, Edwards, Effingham, Esri Shapefile nan, Fayette, Ford, Franklin, Fulton, Gallatin, Greene, Grundy, Hamilton, Hancock, Hardin, Henderson, Henry, IL, Illinois, Iroquois, Jackson, Jasper, Jefferson, Jersey, Jo Daviess, Johnson, Kane, Kankakee, Kendall, Knox, LaSalle, Lake, Lawrence, Lee, Livingston, Logan, Macon, Macoupin, Madison, Map Indices, Map Indices, Map Indices, Marion, Marshall, Mason, Massac, McDonough, McHenry, McLean, Menard, Mercer, Monroe, Montgomery, Morgan, Moultrie, Ogle, Peoria, Perry, Piatt, Pike, Pope, Pulaski, Putnam, Randolph, Richland, Rock Island, Saline, Sangamon, Schuyler, Scott, Shapefile, Shelby, St. Clair, Stark, State, State, Stephenson, Tazewell, US, Union, United States, United States of America, Vermilion, Wabash, Warren, Washington, Wayne, White, Whiteside, Will, Williamson, Winnebago, Woodford, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Allen, Anderson, Atchison, Barber, Barton, All tags... Boundaries, Bourbon, Brown, Butler, Chase, Chautauqua, Cherokee, Cheyenne, Clark, Clay, Cloud, Coffey, Comanche, Cowley, Crawford, Decatur, Dickinson, Doniphan, Douglas, Downloadable Data, Edwards, Elk, Ellis, Ellsworth, Esri Shapefile nan, Finney, Ford, Franklin, Geary, Gove, Graham, Grant, Gray, Greeley, Greenwood, Hamilton, Harper, Harvey, Haskell, Hodgeman, Jackson, Jefferson, Jewell, Johnson, KS, Kansas, Kearny, Kingman, Kiowa, Labette, Lane, Leavenworth, Lincoln, Linn, Logan, Lyon, Map Indices, Map Indices, Map Indices, Marion, Marshall, McPherson, Meade, Miami, Mitchell, Montgomery, Morris, Morton, Nemaha, Neosho, Ness, Norton, Osage, Osborne, Ottawa, Pawnee, Phillips, Pottawatomie, Pratt, Rawlins, Reno, Republic, Rice, Riley, Rooks, Rush, Russell, Saline, Scott, Sedgwick, Seward, Shapefile, Shawnee, Sheridan, Sherman, Smith, Stafford, Stanton, State, State, Stevens, Sumner, Thomas, Trego, US, United States, United States of America, Wabaunsee, Wallace, Washington, Wichita, Wilson, Woodson, Wyandotte, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Adair, Adams, Allamakee, Appanoose, Audubon, All tags... Benton, Black Hawk, Boone, Boundaries, Bremer, Buchanan, Buena Vista, Butler, Calhoun, Carroll, Cass, Cedar, Cerro Gordo, Cherokee, Chickasaw, Clarke, Clay, Clayton, Clinton, Crawford, Dallas, Davis, Decatur, Delaware, Des Moines, Dickinson, Downloadable Data, Dubuque, Emmet, Esri Shapefile nan, Fayette, Floyd, Franklin, Fremont, Greene, Grundy, Guthrie, Hamilton, Hancock, Hardin, Harrison, Henry, Howard, Humboldt, IA, Ida, Iowa, Iowa, Jackson, Jasper, Jefferson, Johnson, Jones, Keokuk, Kossuth, Lee, Linn, Louisa, Lucas, Lyon, Madison, Mahaska, Map Indices, Map Indices, Map Indices, Marion, Marshall, Mills, Mitchell, Monona, Monroe, Montgomery, Muscatine, O'Brien, Osceola, Page, Palo Alto, Plymouth, Pocahontas, Polk, Pottawattamie, Poweshiek, Ringgold, Sac, Scott, Shapefile, Shelby, Sioux, State, State, Story, Tama, Taylor, US, Union, United States, United States of America, Van Buren, Wapello, Warren, Washington, Wayne, Webster, Winnebago, Winneshiek, Woodbury, Worth, Wright, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Aitkin, Anoka, Becker, Beltrami, Benton, All tags... Big Stone, Blue Earth, Boundaries, Brown, Carlton, Carver, Cass, Chippewa, Chisago, Clay, Clearwater, Cook, Cottonwood, Crow Wing, Dakota, Dodge, Douglas, Downloadable Data, Esri Shapefile nan, Faribault, Fillmore, Freeborn, Goodhue, Grant, Hennepin, Houston, Hubbard, Isanti, Itasca, Jackson, Kanabec, Kandiyohi, Kittson, Koochiching, Lac qui Parle, Lake, Lake of the Woods, Le Sueur, Lincoln, Lyon, MN, Mahnomen, Map Indices, Map Indices, Map Indices, Marshall, Martin, McLeod, Meeker, Mille Lacs, Minnesota, Morrison, Mower, Murray, Nicollet, Nobles, Norman, Olmsted, Otter Tail, Pennington, Pine, Pipestone, Polk, Pope, Ramsey, Red Lake, Redwood, Renville, Rice, Rock, Roseau, Scott, Shapefile, Sherburne, Sibley, St. Louis, State, State, Stearns, Steele, Stevens, Swift, Todd, Traverse, US, United States, United States of America, Wabasha, Wadena, Waseca, Washington, Watonwan, Wilkin, Winona, Wright, Yellow Medicine, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Adams, Barnes, Benson, Billings, Bottineau, All tags... Boundaries, Bowman, Burke, Burleigh, Cass, Cavalier, Dickey, Divide, Downloadable Data, Dunn, Eddy, Emmons, Esri Shapefile nan, Foster, Golden Valley, Grand Forks, Grant, Griggs, Hettinger, Kidder, LaMoure, Logan, Map Indices, Map Indices, Map Indices, McHenry, McIntosh, McKenzie, McLean, Mercer, Morton, Mountrail, ND, Nelson, North Dakota, Oliver, Pembina, Pierce, Ramsey, Ransom, Renville, Richland, Rolette, Sargent, Shapefile, Sheridan, Sioux, Slope, Stark, State, State, Steele, Stutsman, Towner, Traill, US, United States, United States of America, Walsh, Ward, Wells, Williams, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Alcona, Alger, Allegan, Alpena, Antrim, All tags... Arenac, Baraga, Barry, Bay, Benzie, Berrien, Boundaries, Branch, Calhoun, Cass, Charlevoix, Cheboygan, Chippewa, Clare, Clinton, Crawford, Delta, Dickinson, Downloadable Data, Eaton, Emmet, Esri Shapefile nan, Genesee, Gladwin, Gogebic, Grand Traverse, Gratiot, Hillsdale, Houghton, Huron, Ingham, Ionia, Iosco, Iron, Isabella, Jackson, Kalamazoo, Kalkaska, Kent, Keweenaw, Lake, Lapeer, Leelanau, Lenawee, Livingston, Luce, MI, Mackinac, Macomb, Manistee, Map Indices, Map Indices, Map Indices, Marquette, Mason, Mecosta, Menominee, Michigan, Midland, Missaukee, Monroe, Montcalm, Montmorency, Muskegon, Newaygo, Oakland, Oceana, Ogemaw, Ontonagon, Osceola, Oscoda, Otsego, Ottawa, Presque Isle, Roscommon, Saginaw, Sanilac, Schoolcraft, Shapefile, Shiawassee, St. Clair, St. Joseph, State, State, Tuscola, US, United States, United States of America, Van Buren, Washtenaw, Wayne, Wexford, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Adams, Asotin, Benton, Boundaries, Chelan, All tags... Clallam, Clark, Columbia, Cowlitz, Douglas, Downloadable Data, Esri Shapefile nan, Ferry, Franklin, Garfield, Grant, Grays Harbor, Island, Jefferson, King, Kitsap, Kittitas, Klickitat, Lewis, Lincoln, Map Indices, Map Indices, Map Indices, Mason, Okanogan, Pacific, Pend Oreille, Pierce, San Juan, Shapefile, Skagit, Skamania, Snohomish, Spokane, State, State, Stevens, Thurston, US, United States, United States of America, WA, Wahkiakum, Walla Walla, Washington, Whatcom, Whitman, Yakima, cells, map indices, polygon grid, Fewer tags Behavioral response of polar bears to aircraft activity on the northern coast of Alaska The rapid loss of arctic sea ice is forcing a larger proportion of the Southern Beaufort Sea polar bear (Ursus maritimus) population to spend more time on land, increasing chances of negative interactions between people and bears. In the United States, the Marine Mammal Protection Act (MMPA) protects polar bears from incidental disturbance from human activities. For the remote and roadless areas of northern Alaska, USA, effective management of small aircraft activity is necessary to limit disturbance, but effects of overflights on polar bear behavior are largely unknown. During 2021 and 2022, we intentionally exposed polar bears (n = 115) to systematic aircraft activity (helicopter, fixed-wing) until we observed... Categories: Publication; Types: Citation USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Adair, Allen, Anderson, Ballard, Barren, All tags... Bath, Bell, Boone, Boundaries, Bourbon, Boyd, Boyle, Bracken, Breathitt, Breckinridge, Bullitt, Butler, Caldwell, Calloway, Campbell, Carlisle, Carroll, Carter, Casey, Christian, Clark, Clay, Clinton, Crittenden, Cumberland, Daviess, Downloadable Data, Edmonson, Elliott, Esri Shapefile nan, Estill, Fayette, Fleming, Floyd, Franklin, Fulton, Gallatin, Garrard, Grant, Graves, Grayson, Green, Greenup, Hancock, Hardin, Harlan, Harrison, Hart, Henderson, Henry, Hickman, Hopkins, Jackson, Jefferson, Jessamine, Johnson, KY, Kenton, Kentucky, Knott, Knox, Larue, Laurel, Lawrence, Lee, Leslie, Letcher, Lewis, Lincoln, Livingston, Logan, Lyon, Madison, Magoffin, Map Indices, Map Indices, Map Indices, Marion, Marshall, Martin, Mason, McCracken, McCreary, McLean, Meade, Menifee, Mercer, Metcalfe, Monroe, Montgomery, Morgan, Muhlenberg, Nelson, Nicholas, Ohio, Oldham, Owen, Owsley, Pendleton, Perry, Pike, Powell, Pulaski, Robertson, Rockcastle, Rowan, Russell, Scott, Shapefile, Shelby, Simpson, Spencer, State, State, Taylor, Todd, Trigg, Trimble, US, Union, United States, United States of America, Warren, Washington, Wayne, Webster, Whitley, Wolfe, Woodford, cells, map indices, polygon grid, Fewer tags USGS National Map Index Names (published 20250115) Shapefile This data represents the map extent for current and historical USGS topographic maps for the United States and Territories, including 1 X 2 Degree, 1 X 1 Degree, 30 X 60 Minute, 15 X 15 Minute, 7.5 X 7.5 Minute, and 3.75 X 3.75 Minute. The grid was generated using ESRI ArcInfo GIS software. Types: Citation; Tags: Adair, Andrew, Atchison, Audrain, Barry, All tags... Barton, Bates, Benton, Bollinger, Boone, Boundaries, Buchanan, Butler, Caldwell, Callaway, Camden, Cape Girardeau, Carroll, Carter, Cass, Cedar, Chariton, Christian, Clark, Clay, Clinton, Cole, Cooper, Crawford, Dade, Dallas, Daviess, DeKalb, Dent, Douglas, Downloadable Data, Dunklin, Esri Shapefile nan, Franklin, Gasconade, Gentry, Greene, Grundy, Harrison, Henry, Hickory, Holt, Howard, Howell, Iron, Jackson, Jasper, Jefferson, Johnson, Knox, Laclede, Lafayette, Lawrence, Lewis, Lincoln, Linn, Livingston, MO, Macon, Madison, Map Indices, Map Indices, Map Indices, Maries, Marion, McDonald, Mercer, Miller, Mississippi, Missouri, Moniteau, Monroe, Montgomery, Morgan, New Madrid, Newton, Nodaway, Oregon, Osage, Ozark, Pemiscot, Perry, Pettis, Phelps, Pike, Platte, Polk, Pulaski, Putnam, Ralls, Randolph, Ray, Reynolds, Ripley, Saline, Schuyler, Scotland, Scott, Shannon, Shapefile, Shelby, St. Charles, St. Clair, St. Francois, St. Louis, State, State, Ste. Genevieve, Stoddard, Stone, Sullivan, Taney, Texas, US, United States, United States of America, Vernon, Warren, Washington, Wayne, Webster, Worth, Wright, cells, map indices, polygon grid, Fewer tags 1 2 3 »