LiDAR Elevation Data: Waushara County, WI 2017

Identification Information

Citation

Title

LiDAR Elevation Data: Waushara County, WI 2017

Originator

Waushara County

Publication Date

2020-07-20

Edition

2017

Geospatial Data Presentation Form

mapDigital

Abstract

This data represents LiDAR elevation information for Waushara County, Wisconsin in 2017. The following derivative products are available: classified LAS, hydro braklines, a countywide DEM, and tile DEMs. Also included for Waushara County are "boundary" (Boundary/). [Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create Breaklines and Raster DEMs. The purpose of these LiDAR data was to produce high accuracy 3D hydro-flattened Digital Elevation Model (DEM) with a 2-ft cell size. The data will be used by FEMA for flood-plain mapping. These raw lidar point cloud data were used to create classified lidar LAS files, 3D breaklines, and hydro-flattened DEMs as necessary. ]

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. [Geographic Extent: Waushara County, Wisconsin covering approximately 647 square miles. Dataset Description: Waushara County, Wisconsin 2017 QL2 LiDAR project required planning and acqusition of LiDAR data collected with a point density of 2 pulses per meter with at a nominal point spacing of 0.71 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) State Plane, Wisconsin South, US survey feet and vertical datum of NAVD1988 (GEOID12B), US survey feet. LiDAR data was delivered as 35 calibrated and controlled RAW flight line swaths, processed to create 760 Classified LAS 1.4 files formatted to individual 5000 x 5000-foot tiles, corresponding 2.0-ft hydro-flattened bare-earth DEMs tiled to the same 5000 x 5000-foot schema in ERDAS .IMG format, and hydro-flattened feature breaklines in Esri polygonZ shapefile and polygonZ file geodatabase feature class format. Ground Conditions: LiDAR was collected in 3 lifts spanning 2 days in the Fall of 2017, with no snow, water at normal levels without unusual inundation, and leaf off conditions. In order to post process the LiDAR data to meet task order specifications, 20 surveyed control points were used to calibrate the LIDAR to known ground locations established throughout the project area. The accuracy of the data was checked with a total of 70 surveyed QC check points.]

Supplemental Information

Data is available for download from: ftp://ftp.ssec.wisc.edu/pub/wisconsinview/lidar/ Detailed, original metadata accompanying this LiDAR data is available inside the ‘Metadata’ folder from WisconsinView. [FEMA Contract No. HSFE60-15-D-0005 FEMA Task Order No. HSFE05-17-J-0005 CONTRACTOR: STARR II SUBCONTRACTOR: Continental Mapping Consultants Continental Mapping Consultants worked with CompassData to acquire and calibrate ground control points. All Lidar data acquisition, calibration, and follow-on processing were completed by Continental Mapping Consultants.] 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. 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

2017-01-01T00:00:00

ISO Topic Category

elevation

Place Keyword

Waushara 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

Status

completed

Maintenance and Update Frequency

unknown

Language

eng

Credit

Waushara County

Point of Contact

Contact

Waushara County

Delivery Point

209 S. Saint Marie St.

City

Wautoma

Administrative Area

WI

Postal Code

54982

Country

US

Phone

920-787-6586

Spatial Reference Information

Reference System Identifier

Code

2289

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

ftp://ftp.ssec.wisc.edu/pub/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

B988D1CA-A421-4588-8DFF-73504E5D586E

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