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LiDAR Elevation Data: Brown County, WI 2020

Identification Information

Citation
Title
LiDAR Elevation Data: Brown County, WI 2020
Originator
U.S Geological Survey
Creation Date
2020-05-07
Publication Date
2020-05-07
Edition
2020
Collection Title
Coastal
Abstract
This data represents LiDAR elevation information for Brown County, WI in 2020. The following derivative products are available: Buildings, Classified LAS, Hydro breaklines, Intensity images (tiled), DEM (tiled), and a tile index. 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 individual 1500 m x 1500 m tiles; used to create intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. Geographic Extent: Brown County covering approximately 573 total square miles. Dataset Description: The WI_BrownRusk_2020_B20, Work Unit 227789 project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.35 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, Version 2.1. The data were developed based on a horizontal projection/datum of NAD 1983 2011 WISCRS Brown Meters, Meter and vertical datum of NAVD88 Geoid 18, Meter. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 720 individual 1500 m x 1500 m tiles, and as 722 tiled intensity images, and 722 tiled bare earth DEMs; all tiled to the same 1500 m x 1500 m schema. Continuous breaklines were produced in Esri file geodatabase format. Tiles 03581777 and 03581807 are located over water and contain no deliverable points. Because of this, there are 2 fewer LAS deliverables than the 722 that appear in the tile index. Ground Conditions: LiDAR was collected in spring 2020, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications and meet ASPRS vertical accuracy guidelines, NV5 Geospatial utilized a total of 12 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 61 independent accuracy checkpoints, 33 in Bare Earth and Urban landcovers (33 NVA points), 28 in Tall Weeds categories (28 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.
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. [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 .5 meter 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
Data is available for download from: https://web.s3.wisc.edu/wsco-wisconsinview/lidar/Brown/Brown_2020_3DEP_Delivery/ Detailed, original metadata accompanying this LiDAR data is available: https://web.s3.wisc.edu/wsco-wisconsinview/lidar/Brown/Brown_2020_3DEP_Delivery/Metadata/
Temporal Extent
Time Instant
2020-05-07T00:00:00
Bounding Box
West
-88.252159
East
-87.762309
North
44.679161
South
44.240204
ISO Topic Category
elevation
Place Keyword
Brown County
Wisconsin
Place Keyword Thesaurus
GNS
Theme Keyword
Digital elevation models
Theme Keyword Thesaurus
LCSH
Theme Keyword
Lidar
Contours
Grids
Surface models
Topography
Elevations
Intensity
Theme Keyword Thesaurus
LCSH
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
unknown
Language
Credit
U.S. Geological Survey
Point of Contact
Contact
U.S. Geological Survey
Delivery Point
305 East Walnut Street, Room 320
City
Green Bay
Administrative Area
WI
Postal Code
54305
Country
US
Phone
920-448-6295
Point of Contact
Contact
NV5 Geospatial
Position Name
Contractor

Spatial Reference Information

Reference System Identifier
Code
7591
Code Space
EPSG
Version
9.7

Data Quality Information

Lineage
Process Step
Description
Added data to archive at UW-Madison.
Process Date
2023-06-14T00:00:00

Distribution Information

Format Name
Various
Format Version
10.5
Distributor
University of Wisconsin-Madison
Online Access
https://web.s3.wisc.edu/wsco-wisconsinview/lidar/Brown/Brown_2020_3DEP_Delivery/
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
WisconsinView.org
Function
download

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
B644C05B-ED90-472E-891F-68B0CE8891AE
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
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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