Contour basemap for the Omaha metropolitan area that includes Douglas & Sarpy Counties & surrounding portions of Dodge & Washington counties. Data was generated from the 2016 QL2 LiDAR project.Deliverables from the project can be downloaded from the project site:https://sarpy.maps.arcgis.com/apps/webappviewer/index.html?id=fd49c0b1d6414828b4034187ff63c6fe

The U.S. Geological Survey, in cooperation with The Central Nebraska Public Power and Irrigation District (CNPPD), conducted a study that used bathymetric and topographic surveying in conjunction with Geographical Information Systems techniques to determine the 2003 physical shape and storage capacity, as well as the change in storage capacity of Lake McConaughy that occurred over 62 years. By combining the bathymetric and topographic survey data, the 2003 surface area of Lake McConaughy was determined to be 30,413.0 acres, with a volume of 1,756,300 acre-feet at the lake conservation-pool elevation of 3,266.4 feet above North American Vertical Datum of 1988 (3,265.0 feet above CNPPD datum). To determine the changes in storage of Lake McConaughy, the 2003 survey Digital Elevation Model (DEM) was compared to a preconstruction DEM compiled from historical contour maps. This comparison showed an increase in elevation at the dam site due to the installation of Kingsley Dam. ...

File geodatabase that includes 1' contours derived from the 2016 eastern Nebraska LiDAR project. The project included Douglas, Sarpy, & Lancaster counties.

These data are the survey results from a five-mile section of the Platte River at, and upstream of the Nebraska Army National Guard Camp Ashland Training Site including the side channel chutes on the east bank. All survey data were collected along planned transect lines that were spaced 492.125 US survey feet apart beginning near the mouth of the Elkhorn River and ending near the U.S. Highway 6 bridge. An effort was made to get complete elevation data for each transect from top of bank to top of bank. Survey grade Global Navigation and Satellite Systems (GNSS) receiving antennas connected to a real time network (RTK high precision network https://hprtk.net) were used to measure elevation along the transects, at the top of banks, along the slope of the banks, at control structures, on islands and sandbars and on the streambed in areas of the wetted channel that were wadable. GNSS data collection methods followed level 3, RTN procedures as described by (Rydlund and Densmore, 2012). An acoustic Doppler current profiler (ADCP) was used to measure streambed elevation in areas of the wetted channel that were not wadable. ADCP data were processed using Velocity Mapping Toolbox (Parsons and others, 2013) to convert measured depths to elevation. This data release contains two comma separated value files. The CSV file named PlatteRiver_GNSS_SurveyData_20200924-20210402.csv contains the GNSS survey data. The CSV file named Bathy_ADCP_final_data_SPCS.csv contains bathymetric survey data.

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

Download In State Plane Projection Here The 2017 Digital Terrain Model (DTM) is a 2 foot pixel resolution raster in Erdas IMG format. This was created using the ground (class = 2) lidar points and incorporating the breaklines. The DTMs were developed using LiDAR data. LiDAR is an acronym for LIght Detection And Ranging. Light detection and ranging is the science of using a laser to measure distances to specific points. A specially equipped airplane with positioning tools and LiDAR technology was used to measure the distance to the surface of the earth to determine ground elevation. The classified points were developed using data collected in April to May 2017. The LiDAR points, specialized software, and technology provide the ability to create a high precision three-dimensional digital elevation and/or terrain models (DEM/DTM). The use of LiDAR significantly reduces the cost for developing this information. The DTMs are intended to correspond to the orthometric heights of the bare surface of the county (no buildings or vegetation cover). DTM data is used by county agencies to study drainage issues such as flooding and erosion; contour generation; slope and aspect; and hill shade images. This dataset was compiled to meet the American Society for Photogrammetry and Remote Sensing (ASPRS) Accuracy Standards for Large-Scale Maps, CLASS 1 map accuracy. The U.S. Army Corps of Engineers Engineering and Design Manual for Photogrammetric Production recommends that data intended for this usage scale be used for any of the following purposes: route location, preliminary alignment and design, preliminary project planning, hydraulic sections, rough earthwork estimates, or high-gradient terrain / low unit cost earthwork excavation estimates. The manual does not recommend that these data be used for final design, excavation and grading plans, earthwork computations for bid estimates or contract measurement and payment. This dataset does not take the place of an on-site survey for design, construction or regulatory purposes.

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

In 2006, a cooperative study was established to compile reliable data describing groundwater and surface-water interactions in the Elkhorn and Loup River Basins. The purpose of the study was to address state legislation that requires a sustainable balance between long term water supplies and uses of surface water and groundwater. A groundwater-flow model [hereinafter referred to as the Elkhorn-Loup Model (ELM)] was constructed as part of the first two phases of that study as a tool for understanding the effect of groundwater pumpage on stream base flow and the effects of management strategies on hydrologically connected groundwater and surface-water supplies. The third phase of the study was implemented to gain additional geologic knowledge and update the ELM with enhanced water-budget information and refined discretization of the model grid and stress periods. As part of that effort, the ELM is being reconstructed to include two vertical model layers, whereas phase-one and phase-two simulations (Peterson and others, 2008; Stanton and others, 2010) represented the aquifer system using one vertical model layer. The goal for defining the base of the upper model layer was to divide the model vertically so that the upper layer had different water transmitting and storage characteristics than the lower layer. Texture descriptions were used in most cases to identify the depth in a test-hole, water well, or surface-geophysical log at which dividing the aquifer produced contrasting texture characteristics for the upper and lower model layers. The study area covers approximately 30,000 square miles, and extends from the Niobrara River in the north to the Platte River in the south. The western boundary roughly coincides with the western boundary of the Upper Loup NRD, and the eastern boundary roughly coincides with the approximate location of the westernmost extent of glacial till in eastern Nebraska (University of Nebraska, 2005). This data release consists of a line shapefile of contours attributed with values representing the elevation of the base of the upper layer of the two-layer phase-three ELM above the vertical datum (National Geodetic Vertical Datum of 1929).

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

Link to the ScienceBase Item Summary page for the item described by this metadata record. Service Protocol: Link to the ScienceBase Item Summary page for the item described by this metadata record. Application Profile: Web Browser. Link Function: information

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

This digital spatial data set consists of the aquifer base elevation contours (50-foot contour interval) for part of the High Plains aquifer in the central United States. This subset of the High Plains aquifer covers the Republican River Basin in Nebraska, Kansas, and Colorado upstream from the streamflow station on the Republican River near Hardy, Nebraska, near the Kansas/Nebraska border. In Nebraska, the digitized contours extend to the South Platte, Platte, and Little Blue Rivers. In Colorado and Kansas, the digital contours extend to the edge of the High Plains aquifer. These boundaries were chosen to simplify boundary conditions for a computer simulation model being used for a hydrologic study of the Republican River Basin.

This digital data release contains spatial datasets of bedrock geology, volcanic ash bed locations, test hole locations, bedrock outcrops, and structure contours of the top of bedrock and the base of the Ogallala Group from a previously published map (Souders, 2000). The GeologicMap feature dataset contains separate feature classes for the Ogallala Group map unit (ContactsAndFaults and MapUnitPolys) and the underlying pre-Ogallala bedrock map units (ContactsAndFaults_Bedrock and MapUnitPolys_Bedrock). The VolcanicAshBedPoints feature class contains the locations of volcanic ash beds within the Ogallala Group. The contours depicting the elevation of the top of bedrock (top of Ogallala Group where present and top of pre-Ogallala bedrock where Ogallala is absent) are contained in the IsoValueLines_TopBedrock feature class. The contours depicting the elevation of the base of the Ogallala Group are contained in the IsoValueLines_BaseOgallala feature class. Contoured values are given in ...

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

Vector data from the basic DLM are generalized for the digital topographic maps and processed according to the ATKIS signature catalogue. The digital data can be submitted via download or on other media carriers. They are available in a maximum of 22 content levels (according to the technical regulations of the AdV) in three forms (individual levels, gray combination and color combination). It should be noted that a UTM grid is only output in the individual levels. The standard resolution is 200L/cm = 508dpi. The TK (ATKIS) presents a map issue with the same content as a printed map. The data is provided free of charge via automated processes or by self-extraction. When using the data, the license conditions must be observed.

The Preliminary Plot 1: 50 000 scale map serises are the initial topographic maps developed for Kenya. They are nbased on air photographs captured by the Royal Air Force (United Kingdom). They are essentially black an dwhite maps showing a simple interpretation of the key topographic features. CRS: Transverse Mercator, Clarke 1880. Publishers: DCS Directorate of Colonial Surveys (United Kingdom Government); KS Kenya Survey; GSGS War Office (United Kingdom Government); DOS Directorate of Overseas Surveys (United kingdom Government) Except map A37 VI SW South Ndakathima which is in Arc (1960) Clarke (1880)