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Sixteen species of Haliplidae belonging to three genera are recorded from Colorado: *Brychius hornii Crotch, Peltodytes callosus (LeConte), P. edentulus (LeConte), *P. litoralis Matheson, *Haliplus apicalis C.G. Thomson, *H. canadensis Wallis, H. cribrarius LeConte, H. deceptus Matheson, *H. distinctus Wallis, H. fulvus Fabricius, H. immaculicollis Harris, H. leechi Wallis, H. longulus LeConte, *H. stagninus Leech, *H. tortilipenis Brigham and Sanderson, and H. triopsis Say. Seven of these species (*) represent new state records, and H. distinctus is reported from the United States for the first time. Haliplids found in Colorado generally fit one of the following distributional patterns for North America: Western,...
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The Geographic Names Information System (GNIS) is the Federal standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS for the U.S. Board on Geographic Names, a Federal inter-agency body chartered by public law to maintain uniform feature name usage throughout the Government and to promulgate standard names to the public. The GNIS is the official repository of domestic geographic names data; the official vehicle for geographic names use by all departments of the Federal Government; and the source for applying geographic names to Federal electronic and printed products of all types.
Tags: AS, American Samoa, Antarctica, Antarctica, BGN, All tags...
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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.
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The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water...
Tags: AS, Administrative watershed units, Administrative watershed units, American Samoa, Area of Complex Channels, All tags...
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The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water...
Tags: AS, Administrative watershed units, Administrative watershed units, American Samoa, Area of Complex Channels, All tags...
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The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water...
Tags: AS, Administrative watershed units, Administrative watershed units, American Samoa, Area of Complex Channels, All tags...
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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.
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The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" "Standard" (https://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level)...
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The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" "Standard" (https://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level)...
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The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water...
Tags: AS, Administrative watershed units, Administrative watershed units, American Samoa, Area of Complex Channels, All tags...
Biennial, interannual, and decadal signals in the Pacific basin are observed to share patterns and evolution in covarying sea surface temperature (SST), 18°C isotherm depth (Z18), zonal surface wind (ZSW), and wind stress curl (WSC) anomalies from 1955 to 1999. Each signal has warm SST anomalies propagating slowly eastward along the equator, generating westerly ZSW anomalies in their wake. These westerly ZSW anomalies produce cyclonic WSC anomalies off the equator which pump baroclinic Rossby waves in the western/central tropical North Pacific Ocean. These Rossby waves propagate westward, taking ∼6, ∼12, and ∼36 months to reach the western boundary near ∼7°N, ∼12°N, and ∼18°N on biennial, interannual, and decadal...


map background search result map search result map USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 22 (published 20230525) Shapefile USGS National Boundary Dataset (NBD) in American Samoa State or Territory (published 20240215) FileGDB USGS National Boundary Dataset (NBD) in American Samoa State or Territory (published 20240215) Shapefile USGS National Map Index Names (published 20240120) Shapefile USGS National Map Index Names (published 20240120) FileGDB USGS 1:24000-scale Quadrangle for Western, WA 1956 USGS 1:24000-scale Quadrangle for Western, WA 1956 USGS 1:24000-scale Quadrangle for Western, WA 1956 USGS National Structures Dataset (NSD) American Samoa (published 20240215) FileGDB USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 8 - 22030001 (published 20240105) FileGDB USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 4 - 2203 (published 20231213) FileGDB USGS National Hydrography Dataset Best Resolution (NHD) - American Samoa (published 20231227) GeoPackage USGS National Structures Dataset (NSD) American Samoa (published 20240215) GeoPackage USGS National Transportation Dataset (NTD) for American Samoa (published 20240215) GeoPackage USGS National Boundary Dataset (NBD) in American Samoa State or Territory (published 20240215) GeoPackage USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 8 - 22030001 (published 20240105) GeoPackage USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 22 (published 20230525) GeoPackage Geographic Names Information System (GNIS) Full Model for AS (published 20240206) FileGDB USGS 1:24000-scale Quadrangle for Western, WA 1956 USGS 1:24000-scale Quadrangle for Western, WA 1956 USGS 1:24000-scale Quadrangle for Western, WA 1956 USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 8 - 22030001 (published 20240105) FileGDB USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 8 - 22030001 (published 20240105) GeoPackage USGS National Boundary Dataset (NBD) in American Samoa State or Territory (published 20240215) FileGDB USGS National Boundary Dataset (NBD) in American Samoa State or Territory (published 20240215) Shapefile USGS National Map Index Names (published 20240120) Shapefile USGS National Map Index Names (published 20240120) FileGDB USGS National Structures Dataset (NSD) American Samoa (published 20240215) FileGDB USGS National Hydrography Dataset Best Resolution (NHD) - American Samoa (published 20231227) GeoPackage USGS National Structures Dataset (NSD) American Samoa (published 20240215) GeoPackage USGS National Transportation Dataset (NTD) for American Samoa (published 20240215) GeoPackage USGS National Boundary Dataset (NBD) in American Samoa State or Territory (published 20240215) GeoPackage Geographic Names Information System (GNIS) Full Model for AS (published 20240206) FileGDB USGS National Hydrography Dataset Best Resolution (NHD) for Hydrological Unit (HU) 4 - 2203 (published 20231213) FileGDB USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 22 (published 20230525) Shapefile USGS Watershed Boundary Dataset (WBD) for 2-digit Hydrologic Unit - 22 (published 20230525) GeoPackage