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LiDAR Elevation Data: Adams County, WI 2010

Identification Information

Citation
Title
LiDAR Elevation Data: Adams County, WI 2010
Originator
Adams County
Publication Date
2020-06-11
Edition
2010
Geospatial Data Presentation Form
mapDigital
Abstract
This data represents LiDAR elevation information for Adams County, WI in 2010. The following derivative products are available: bare earth points, classified LAS, 2-foot contours, derived terrain, hydro breaklines, and a countywide DEM.For Bare Earth Points: [The Bare Earth LAS was developed from a LiDAR flight flown in the Spring of 2010 as part of the Adams County 2010 WROC project.]For Bare Earth DEM: [The Bare Earth DEM was developed from LAS points and breaklines collected from a LiDAR flight flown in the Spring of 2010, as part of the Adams County 2010 Project. The DEM is a raster data set in ESRI GRID format with an X, Y, Z value located at the center of each 5 ft. by 5 ft. cell. The DEM was generated from a DTM meeting ASPRS Class II standards.]For Hydro Breaklines: [The Breakline vectors were developed from the LiDAR points to define hard and soft breaklines, mostly hydrography, in the terrain surface, as part of the Adams County 2010 lidar Project.]For 2-foot contours: [The Bare Earth DTM was developed from LAS points and breaklines collected from a LiDAR flight flown in the Spring of 2010, as part of the Adams County 2010 WROC project. The DTM is used to develop a TIN (Triangulated Irregular Network). All map products will meet ASPRS Class II accuracy standards. The horizontal and vertical coordinates shall be referenced to the County coordinate system (NAD83 in Feet) and 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. For Bare Earth Points: [The 2010 Bare Earth LAS and DWG files contain a subset of the total LiDAR point cloud. This dataset constitutes the bare terrain surface data set with all other classifications omitted. File formats include: ESRI Shapefile, AutoCAD DWG, and LAS format. Coupled with the breakline features this data set is the 2010 Adams County digital terrain model.] For Bare Earth DEM: [The 2010 Bare Earth two-Foot DEM was developed as a derivative product for use in general surface modeling and depiction.] For Hydro Breaklines: [The 2010 breaklines dataset contains the hydrographic breaklines necessary for terrain surface development. This dataset establishes the deviation parameters for the development of derivative terrain data. File formats include: ESRI shapefile and AutoCAD DWG format.] For 2-foot contours: [The 2010 two-foot contours were developed as a derivative product for use in general surface modeling and depiction. File formats include ESRI Shapefile and AutoCAD DWG format.]
Supplemental Information
Data is available for download from: https://web.s3.wisc.edu/wsco-wisconsinview/lidar/ Below are the definitions for each LiDAR derivative product. 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. 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
2010-01-01T00:00:00
Bounding Box
West
-90.015029
East
-89.597364
North
44.248796
South
43.641584
ISO Topic Category
elevation
Place Keyword
Adams County
Wisconsin
Place Keyword Thesaurus
GNS
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
Adams County
Point of Contact
Contact
Adams County
Delivery Point
PO Box 219
City
Friendship
Administrative Area
WI
Postal Code
53934
Country
US
Email
jhelgeson@co.adams.wi.us
Phone
608-338-4206

Spatial Reference Information

Reference System Identifier
Code
8226
Code Space
EPSG
Version
9.7

Data Quality Information

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
23266

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
C40AAD02-2CCF-4D6C-9BE9-0F7E74A2D63D
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
Email
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
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