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LiDAR Elevation Data: Ashland County, WI 2014
- Identification Information
- Spatial Reference Information
- Distribution Information
- Spatial Representation Information
- Metadata Reference Information
Identification Information
- Citation
- Title
- LiDAR Elevation Data: Ashland County, WI 2014
- Originator
- Ashland County
- Publication Date
- 2020-06-17
- Edition
- 2014
- Geospatial Data Presentation Form
- mapDigital
- Collection Title
- Coastal
- Abstract
- This data represents LiDAR elevation information for Ashland County, WI in 2014. The following derivative products are available: classified LAS, 2-foot contours, hydro breaklines, a countywide DEM, and a countywide DSM. Also included for Ashland County are "buildings" (AshlandCo_buildings.shp) and "vegetation" (AshlandVeg.gdb).[The Ashland County lidar project area covers approximately 1137 square miles. Project specifications are based on Ashland County requirements. The data was developed based on a horizontal projection/datum of NAD_1983_HARN_WISCRS_Ashland_County_Feet, and vertical datum of NAVD88.]
- Purpose
- This data is intended for reference and mapping purposes, and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. [This data creates additional enhancements and derivatives from the 2015 Ashland County FEMA lidar dataset.]
- Supplemental Information
- Data is available for download from: https://web.s3.wisc.edu/wsco-wisconsinview/lidar/ Detailed, original metadata accompanying this LiDAR data is available inside the ‘Metadata’ folder from WisconsinView. Bare Earth Points: Bare earth LiDAR is digital elevation data of the terrain surface consisting of irregularly spaced points, each with x/y location coordinates and z-value. The data have been subjected to automated and manual editing to remove vegetation, buildings, and other man-made structures. Classified LAS: Point classification using semi-automated techniques on the point cloud to assign the feature type associated with each point. Lidar points can be classified into a number of categories including bare earth or ground, top of canopy, and water. The different classes are defined using numeric integer codes in the LAS files. Contours: A line through all contiguous points of equal elevation value. Contours are vector features used to represent the elevation of a landscape in a relatively familiar way. They are typically used for basemaps and general topographic representation. [Contour line types: Index, Intermediate, Index Depression, Intermediate Depression. ESRI PolylineZM] Derived Terrain: A vector data set composed of regularly spaced points and natural features such as ridges and breaklines. A DTM augments a DEM by including linear features of the bare-earth terrain. Hydro Breaklines: Breaklines maintain the definition of water-related features in an elevation model. They are used to capture linear discontinuities in the surface, lake shorelines, single-line drains for small rivers, and double-line drains for large rivers. [Coupled with the classified lidar bare earth points, this data set is the 2010 digital terrain model.] Countywide Digital Elevation Model (DEM): A DEM represents the bare-Earth surface, removing all natural and built features. The dataset contains a single file covering the entire county. Tiled Digital Elevation Model (DEM): A Digital Elevation Model (DEM) represents the bare-Earth surface, removing all natural and built features. The data contains (possibly) hundreds of individual files available to download as small tiled geographic areas over the extent of an entire county. Digital Surface Model (DSM): A Digital Surface Model (DSM) captures both the natural and built/artificial features of the environment.
- Temporal Extent
- Time Instant
- 2014-01-01T00:00:00
- Bounding Box
- West
- -90.937478
- East
- -90.300592
- North
- 46.873356
- South
- 45.975118
- ISO Topic Category
- elevation
- Place Keyword
- Ashland County
-
Wisconsin
- Place Keyword Thesaurus
- Theme Keyword
-
Digital elevation models
- Theme Keyword Thesaurus
- LCSH
- Theme Keyword
- Lidar
- Contours
- Grids
- Surface models
- Terrain models
- Hydrography
- Topography
-
Elevations
- Theme Keyword Thesaurus
- LCSH
- Status
- completed
- Maintenance and Update Frequency
- unknown
- Language
- eng
- Credit
- Ashland County
- Point of Contact
- Contact
- Ashland County
Spatial Reference Information
- Reference System Identifier
- Code
- 8224
- Code Space
- EPSG
- Version
- 9.7
Distribution Information
- Format Name
- Various
- Format Version
- 1.0
- Distributor
- University of Wisconsin-Madison
- Distributor
- Online Access
- https://web.s3.wisc.edu/wsco-wisconsinview/lidar/
- Protocol
- WWW:DOWNLOAD-1.0-http--download
- Name
- WisconsinView.org
- Function
- download
Spatial Representation Information
- Vector
- Topology Level
- geometryOnly
- Vector Object Type
- surface
- Vector Object Count
Metadata Reference Information
- Hierarchy Level
- dataset
- Metadata File Identifier
- F263F74A-B744-4AA3-B563-DB7499145CD7
- Metadata Point of Contact
- Name
- Arthur H. Robinson Map Library
- Position Name
- Metadata Technician
- Delivery Point
- 550 N. Park Street
- City
- Madison
- Administrative Area
- WI
- Postal Code
- 53706
- Country
- US
- askmap@library.wisc.edu
- Phone
- (608) 262-1471
- Metadata Date Stamp
- 2020-06-22
- Metadata Standard Name
- ISO 19139 Geographic Information - Metadata - Implementation Specification
- Metadata Standard Version
- 2007
- Character Set
- utf8