View Metadata

LiDAR Elevation Data: Rusk County, WI 2020

Identification Information

Citation
Title
LiDAR Elevation Data: Rusk County, WI 2020
Originator
U.S. Geological Survey
Creation Date
2020-05-09
Publication Date
2020-05-09
Edition
2020
Other Citation Details
Contract No. G16PC00016, Task Order No. 140G0220F0108; CONTRACTOR: NV5 Geospatial
Abstract
This data represents LiDAR elevation information for Rusk County, Wisconsin in 2020. The following derivative products are available: classified LAS, hydro breaklines, tiled DEM, intensity images (tiled), and a tile index file. 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 1352 individual 1500 m x 1500 m tiles; used to create intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. Geographic Extent: 7 counties in Wisconsin, covering approximately 939 total square miles. Dataset Description: The WI_BrownRusk_2020_B20, Work Unit 193610 project 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, Version 2.1. The data were developed based on a horizontal projection/datum of NAD 1983 2011 WISCRS Rusk Feet, Feet and vertical datum of NAVD88 Geoid 18, Feet. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 1352 individual 1500 m x 1500 m tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 1500 m x 1500 m schema. Continuous breaklines were produced in Esri file geodatabase format. 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 26 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 60 independent accuracy checkpoints, 34 in Bare Earth and Urban landcovers (34 NVA points), 26 in Tall Weeds categories (26 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data. These are Digital Elevation Model (DEM) data for Wisconsin as part of the required deliverables for the WI_BrownRusk_2020_B20, Work Unit 193610 project. Class 2 (ground) LiDAR points in conjunction with the hydro breaklines were used to create a 1 meter 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 1 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/Rusk/Rusk_2020_3DEP_Delivery/ Detailed, original metadata accompanying this LiDAR data is available: https://web.s3.wisc.edu/wsco-wisconsinview/lidar/Rusk/Rusk_2020_3DEP_Delivery/Metadata/ DEM: Raster File Type = GeoTIFF; Bit Depth/Pixel Type = 32-bit float; Raster Cell Size = 1 meter; Interpolation or Resampling Technique = Triangulated Irregular Network (TIN), Linear Interpolation, Proprietary; Required Vertical Accuracy = 0.196
Temporal Extent
Time Instant
2020-05-09T00:00:00
Bounding Box
West
-91.5452017143
East
-90.675481201
North
45.6401338122
South
45.2899425036
ISO Topic Category
elevation
Place Keyword
Rusk County
Wisconsin
Place Keyword Thesaurus
GNS
Theme Keyword
Digital elevation models
Theme Keyword Thesaurus
LCSH
Theme Keyword
Lidar
Grids
Contours
Surface models
Terrain models
Relief 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.
Status
completed
Maintenance and Update Frequency
unknown
Language
eng
Credit
U.S. Geological Survey
Point of Contact
Contact
U.S. Geological Survey
Point of Contact
Contact
NV5 Geospatial
Email
jackie.monge@nv5.com
Phone
859-277-8700

Spatial Reference Information

Reference System Identifier
Code
7630
Code Space
EPSG
Version
9.7

Data Quality Information

Completeness Commission
Lineage
Process Step
Description
Hydro-Flattened Raster DEM Processing: Class 2 (Ground) LiDAR points in conjunction with the hydro-breaklines were used to create a 1 meter hydro-flattened raster DEM. Using automated scripting routines in proprietary software, GeoTIFF files were created for each tile. Each surface was reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface.
Process Step
Description
Add data to UW-Madison archive.
Process Date
2023-06-20T00:00:00

Distribution Information

Format Name
Various
Format Version
1.0
Distributor
University of Wisconsin-Madison
Online Access
https://web.s3.wisc.edu/wsco-wisconsinview/lidar/Rusk/Rusk_2020_3DEP_Delivery/
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
WisconsinView.org
Function
download

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
8C7AF75C-9877-460C-A0D4-2A21A70729E3
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
Download