Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Shoreline boundaries for reservoirs, State Fishing Lakes, and many local lakes. Shorelines were digitized using NAIP aerial imagery from 2008, with occasional reference to older imagery when needed if the "normal" shoreline was submerged from unusually high water levels. </SPAN></P><P><SPAN>Last updated: May 23, 2014.</SPAN></P></DIV></DIV></DIV>
Copyright Text: You may use these data freely. Please acknowledge the Kansas Department of Wildlife, Parks and Tourism and the Kansas Biological Survey at the University of Kansas as appropriate.
Data set created by Michael Houts at the Kansas Biological Survey.
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Bathymetry Data Collection Method (2006-2013):</SPAN></P><P><SPAN>High precision sonar system, along with computer maps and global positioning systems, allow a dense pattern to be collected, with a location (latitude-longitude) coordinate for each depth measurement. The Kansas Biological Survey used a state-of-the-art, scientific-grade acoustic echosounding system from Biosonics Inc., Seattle, that integrates digital echosounding technology with a differential global positioning system (GPS) and real-time onscreen data preview.</SPAN></P><P><SPAN>Prior to conducting a bathymetric survey, researchers create a series of transect lines for the reservoir to guide a boat during the survey. Transect lines are spaced 100-150 meters apart for federal reservoirs and more closely, 25-50 meters apart, for smaller state and local lakes. Using GPS as a guide, the boat echosounder follow the transects around and across the lake, collecting five depth measurements every second.</SPAN></P><P><SPAN>After field acquisition of raw data, additional computer processing takes place at the Kansas Biological Survey offices. Researchers apply corrections to compensate for transducer depth. They also reference depth data to the lake elevation to create a file of lake bottom elevation values. The thousands of points of data are then interpolated to a surface, using mathematical models in a geographic information system, to create the bathymetric maps.</SPAN></P><P><SPAN>Bathymetric maps are representative of lake bottom contours at the time of the survey; the maps are not used for navigation, for any purpose relating to safety, or as professional survey reference. </SPAN></P><P><SPAN>Water surface elevations listed for federal reservoirs are based on the normal operating water level as determined by the U. S. Army Corps of Engineers or the U. S. Bureau of Reclamtion. Water levels for the state and local reservoirs are based on the water surface elevation as determined by the Kansas Biological Survey on the date of that reservoir's bathymetric survey. All reservoirs areas, volumes and shoreline lengths are based on these water surface elevations.</SPAN></P><P><SPAN>Majority of the funding was provided by the Kansas Water Office, the Kansas GIS Policy Board, and the Kansas Biological Survey.</SPAN></P><P><SPAN>Several federal and state agencies contributed to the compilation of this dataset. GIS processing was done at the Kansas Biological Survey.</SPAN></P></DIV></DIV></DIV>
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Description: <DIV STYLE="text-align:Left;"><DIV><P><SPAN>To assist sampling efforts for research and monitoring, a sampling grid was created that coverd the full extent of Kansas waterbodies. Reservoirs utalize a 333x333 meter grid cell, to create a sampling area of almost 1 sq km. smaller waterbodies like state fishing lakes and local lakes utalize a 100x100 meter sampling grid. For each grid cell, the center coordinate point was calculate and is included in the attribute information to assist with locating the correct location.</SPAN></P></DIV></DIV>
Copyright Text: Data set created by Michael Houts (at the Kansas Biological Survey).
Description: <DIV STYLE="text-align:Left;"><DIV><P><SPAN>To assist sampling efforts for research and monitoring, a sampling grid was created that coverd the full extent of Kansas waterbodies. Reservoirs utalize a 333x333 meter grid cell, to create a sampling area of almost 1 sq km. smaller waterbodies like state fishing lakes and local lakes utalize a 100x100 meter sampling grid. For each grid cell, the center coordinate point was calculate and is included in the attribute information to assist with locating the correct location.</SPAN></P></DIV></DIV>
Copyright Text: Data set created by Michael Houts (at the Kansas Biological Survey).
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Shoreline boundaries for reservoirs, State Fishing Lakes, and many local lakes. Shorelines were digitized using NAIP aerial imagery from 2008, with occasional reference to older imagery when needed if the "normal" shoreline was submerged from unusually high water levels. </SPAN></P><P><SPAN>Last updated: May 23, 2014.</SPAN></P></DIV></DIV></DIV>
Copyright Text: You may use these data freely. Please acknowledge the Kansas Department of Wildlife, Parks and Tourism and the Kansas Biological Survey at the University of Kansas as appropriate.
Data set created by Michael Houts at the Kansas Biological Survey.
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>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 bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.</SPAN></P><P><SPAN>Data downloaded from: http://nhd.usgs.gov/</SPAN></P></DIV></DIV></DIV>
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>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 bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.</SPAN></P><P><SPAN>Data downloaded from: http://nhd.usgs.gov/</SPAN></P></DIV></DIV></DIV>