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LiDAR Elevation Data: Marathon County, WI 2021

Identification Information

Citation
Title
LiDAR Elevation Data: Marathon County, WI 2021
Originator
U.S. Geological Survey
Creation Date
2021-04-21
Publication Date
2021-04-21
Edition
2021
Geospatial Data Presentation Form
mapDigital
Abstract
This data represents LiDAR elevation information for Marathon County, Wisconsin in 2021. The following derivative products are available: Classified LAS, tile index, hydro breaklines, tiled intensity images, and tiled DEMs. Also included are several countywide products created by the WisconsinView Partners - the WI Department of Administration’s Geographic Information Office in collaboration with the UW-Madison Space Science and Engineering Center’s (SSEC) WisconsinView repository. Original lidar data in tiled format from federal (USGS 3DEP) and/or local county lidar projects were used to create countywide mosaics of specific datasets such as DEMS, Intensity values and DSMs in various projections and coordinate systems. [These lidar data are processed Classified LAS 1.4 files, formatted to 2272 individual 4500 ft x 4500 ft tiles; used to create intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. Geographic Extent: 9 counties in Wisconsin, covering approximately 1586 total square miles. Dataset Description: The 37876_WI_Statewide_2021_B21 project, Work Unit 300040 called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.71 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, 2020 rev. A. The data were developed based on a horizontal projection/datum of NAD 1983 2011 WISCRS Marathon Feet, Foot US and vertical datum of NAVD88 Geoid 18, Foot US. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 2272 individual 4500 ft x 4500 ft tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 4500 ft x 4500 ft schema. Continuous breaklines were produced in Esri file geodatabase format. Ground Conditions: LiDAR was collected in spring 2021, while no snow was on the ground and rivers were at or below normal levels. These are Digital Elevation Model (DEM) data for Wisconsin as part of the required deliverables for the 37876_WI_Statewide_2021_B21 project. Class 2 (ground) LiDAR points in conjunction with the hydro breaklines were used to create a 2 foot hydro-flattened Raster DEM.]
Purpose
To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create intensity images, breaklines and raster DEMs. The purpose of these LiDAR data was to produce high accuracy 3D hydro-flattened digital elevation models (DEMs) with a 2 foot cell size. These raw LiDAR point cloud data were used to create classified LiDAR LAS files, intensity images, 3D breaklines, and hydro-flattened DEMs as necessary.
Supplemental Information
Detailed metadata can be found by visting: https://web.s3.wisc.edu/wsco-wisconsinview/lidar/Marathon/Marathon_2021_3DEP_Delivery/Metadata/
Temporal Extent
Time Instant
2021-04-21T00:00:00
Bounding Box
West
-90.320395
East
-89.221092
North
45.119788
South
44.683225
ISO Topic Category
elevation
Place Keyword
Marathon County
Wisconsin
Place Keyword Thesaurus
GNS
Theme Keyword
Lidar
Remote sensing
Contours
Grids
Surface models
Terrain models
Hydrography
Topography
Elevations
Theme Keyword Thesaurus
LCSH
Resource Constraints
Use Limitation
None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the organization providing these data to the public would be appreciated for products derived from these data.
Legal Constraints
Use Limitation
Although this data is being distributed by the University of Wisconsin-Madison, no warranty expressed or implied is made by the University as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the University in the use of this data, or related materials.
Status
completed
Maintenance and Update Frequency
asNeeded
Language
eng
Credit
U.S. Geological Survey
Point of Contact
Contact
U.S. Geological Survey
Point of Contact
Contact
NV5 Geospatial
Position Name
Contractor
Delivery Point
523 Wellington Way
City
Lexington
Administrative Area
KY
Postal Code
40503
Country
US
Phone
859-277-8700

Spatial Reference Information

Reference System Identifier
Code
7618
Code Space
EPSG
Version
10.084

Data Quality Information

Completeness Commission
Lineage
Process Step
Description
Provided access to archived data at UW-Madison.
Process Date
2023-06-14T00:00:00

Distribution Information

Format Name
Multiple Formats
Distributor
University of Wisconsin-Madison
Online Access
https://web.s3.wisc.edu/wsco-wisconsinview/lidar/Marathon/Marathon_2021_3DEP_Delivery/
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
WisconsinView
Function
download

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
B8072336-E914-4DA2-BB5A-4FAF1ADECAA0
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
2023-06-20
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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