LiDAR Elevation Data: Winnebago County, WI 2014

Identification Information

Citation

Title

LiDAR Elevation Data: Winnebago County, WI 2014

Originator

U.S. Geological Survey

Publication Date

2020-07-16

Edition

2014

Geospatial Data Presentation Form

mapDigital

Abstract

This data represents LiDAR elevation information for Winnebago County, WI in 2014. The following derivative products are available: bare earth points, classified LAS, 2-foot contours, hydro breaklines, intensity images, a countywide DEM, and tile DEMs. Also included for Winnebago County is "boundary" (Winnebago_Project_Boundary.shp). For Classified LAS: [These lidar data are processed dlassified LAS 1.4 files, formatted to 581 individual 5,000-foot x 5,000-foot tiles; used to create intensity images, 3D breaklines and hydro-flattened DEMs as necessary. Geographic Extent: Partial coverage of Winnebago County, Wisconsin, covering approximately 432 total square miles Dataset Description: Winnebago County, WI 2016 QL2 Lidar project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83 (2011), Wisconsin Coordinate Reference System (WISCRS) Calumet, Fond du Lac, Outagamie and Winnebago Counties, US survey feet and vertical datum of NAVD88 (GEOID12B), US survey feet. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files formatted to 581 individual 5,000 ft x 5,000 ft tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 5,000 ft x 5,000 ft schema. Breaklines were produced in Esri shapefile format. Tiled 2-foot contours were created in Esri file geodatabase format. Ground Conditions: Lidar was collected in spring of 2014, 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, Quantum Spatial, Inc. utilized a total of 21 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 100 independent accuracy checkpoints, 40 in Bare Earth and Urban landcovers (40 NVA points), 60 in Forested, Brushlands, and Tall Weeds categories (60 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.]For 2-foot contours: [Contours with a 2-foot interval in Esri file geodatabase format. Geographic Extent: Partial coverage of Winnebago County, Wisconsin, covering approximately 432 total square miles Dataset Description: Winnebago County, WI 2016 QL2 Lidar project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83 (2011), Wisconsin Coordinate Reference System (WISCRS) Calumet, Fond du Lac, Outagamie and Winnebago Counties, US survey feet and vertical datum of NAVD88 (GEOID12B), US survey feet. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files formatted to 581 individual 5,000 ft x 5,000 ft tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 5,000 ft x 5,000 ft schema. Breaklines were produced in Esri shapefile format. Tiled 2-foot contours were created in Esri file geodatabase format. Ground Conditions: Lidar was collected in spring of 2014, 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, Quantum Spatial, Inc. utilized a total of 21 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 100 independent accuracy checkpoints, 40 in Bare Earth and Urban landcovers (40 NVA points), 60 in Forested, Brushlands, and Tall Weeds categories (60 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.]For hydro breaklines: [Breakline data was used to hydro-flatten the DEMs created for the Winnebago County, WI QL2 lidar project. Breaklines were reviewed against lidar intensity imagery to verify completeness of capture. Geographic Extent: Partial coverage of Winnebago County, Wisconsin, covering approximately 432 total square miles Dataset Description: Winnebago County, WI 2016 QL2 Lidar project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83 (2011), Wisconsin Coordinate Reference System (WISCRS) Calumet, Fond du Lac, Outagamie and Winnebago Counties, US survey feet and vertical datum of NAVD88 (GEOID12B), US survey feet. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files formatted to 581 individual 5,000 ft x 5,000 ft tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 5,000 ft x 5,000 ft schema. Breaklines were produced in Esri shapefile format. Tiled 2-foot contours were created in Esri file geodatabase format. Ground Conditions: Lidar was collected in spring of 2014, 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, Quantum Spatial, Inc. utilized a total of 21 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 100 independent accuracy checkpoints, 40 in Bare Earth and Urban landcovers (40 NVA points), 60 in Forested, Brushlands, and Tall Weeds categories (60 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.]For DEM: [These are Digital Elevation Model (DEM) data for Winnebago County, WI as part of the required deliverables for the Winnebago County, WI QL2 Lidar project. Class 2 (ground) lidar points in conjunction with the hydro breaklines were used to create a 5-foot hydro-flattened raster DEM. Geographic Extent: Partial coverage of Winnebago County, Wisconsin, covering approximately 432 total square miles Dataset Description: Winnebago County, WI 2016 QL2 Lidar project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83 (2011), Wisconsin Coordinate Reference System (WISCRS) Calumet, Fond du Lac, Outagamie and Winnebago Counties, US survey feet and vertical datum of NAVD88 (GEOID12B), US survey feet. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files formatted to 581 individual 5,000 ft x 5,000 ft tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 5,000 ft x 5,000 ft schema. Breaklines were produced in Esri shapefile format. Tiled 2-foot contours were created in Esri file geodatabase format. Ground Conditions: Lidar was collected in spring of 2014, 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, Quantum Spatial, Inc. utilized a total of 21 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 100 independent accuracy checkpoints, 40 in Bare Earth and Urban landcovers (40 NVA points), 60 in Forested, Brushlands, and Tall Weeds categories (60 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 foot cell size. These raw lidar point cloud data were used to create classified lidar LAS files, intensity images, 3D breaklines, hydro-flattened DEMs, and contours as necessary.]

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. This can be entered here in Supplemental Information for each one present in a county. [Winnebago County Purchase of Services Agreement July 1, 2016 CONTRACTOR: Quantum Spatial, Inc. All follow-on processing was completed by the prime contractor.] 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. [Breakline File Type = SHP Breakline Elevation Units = US Survey Feet Downhill Treatment Applied = Monotonic, Proprietary Type of Hydro Treatment Required = Hydro-flattened ] 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. [Raster File Type = IMG Bit Depth/Pixel Type = 32-bit float Raster Cell Size = 5.0 U.S. Survey Feet Interpolation or Resampling Technique = Triangulated Irregular Network (TIN), Linear Interpolation, Proprietary ] 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

ISO Topic Category

elevation

Place Keyword

Winnebago County

Wisconsin

Place Keyword Thesaurus

GNS

Theme Keyword

Digital elevation models

Theme Keyword Thesaurus

FGDC

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

U.S. Geological Survey

Point of Contact

Contact

U.S. Geological Survey

Point of Contact

Contact

Ayres Associates

Delivery Point

5201 E Terrace Drive, Suite 200

City

Madison

Administrative Area

Wisconsin

Postal Code

53718

Email

NienowZ@AyresAssociates.com

Phone

(608) 443-1200

Spatial Reference Information

Reference System Identifier

Code

7594

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

Metadata Reference Information

Hierarchy Level

dataset

Metadata File Identifier

61BA9C7A-B335-4B26-BD55-FB709BC76897

Metadata Point of Contact

Name

Arthur H. Robinson Map Library

Position Name

metadata technician

Delivery Point

550 N. Park St

City

Madison

Administrative Area

Wisconsin

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