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Buildings Manitowoc County, WI 2016

Identification Information

Citation
Title
Buildings Manitowoc County, WI 2016
Originator
Manitowoc County
Publication Date
2017-03-31
Geospatial Data Presentation Form
mapDigital
Collection Title
Coastal
Abstract
This point data layer represents buildings for Manitowoc County, WI 2016.[The Manitowoc County lidar project area covers approximately 602 square miles plus a 100 meter buffer around the county boundary. The lidar data was acquired at a nominal point spacing (NPS) of 0.7 meters and a single swath nominal point density (NPD) of 2.0. Project specifications are based on Manitowoc County requirements and on the U.S. Geological Survey National Geospatial Program LiDAR Base Specification, Version 1.2. The data was developed based on a horizontal projection/datum of Coordinate System: The data was developed based on a horizontal projection/datum of NAD_1983(2011)_WISCRS_Manitowoc_County_Feet (EPSG code: 7614), and vertical datum of NAVD88 - Geoid12A (Feet). LiDAR data was acquired using the Orion Optech H300 sensor from November 2, 2015 to November 10, 2015 in five total lifts. Acquisition occurred after leaves had fallen from deciduous trees, before snow was on the ground, and with rivers at or below normal levels.]
Purpose
This layer 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. [This data, along with its derivatives, is the result of a countywide elevation mapping with cooperative partnerships from Manitowoc County, Wisconsin DOA, and the USGS 3DEP program. This data was produced from lidar data collected in November 2015, which was processed and delivered in 2016.]
Supplemental Information
Augmented original metadata with UW-Madison specific elements. [The lidar data produced for this project was used to generate 2D building outlines for County applications. The classified building roof points (Class 6) are processed through modeling software which employs edge-detection macros to determine the outside extents of buildings. A degree of manual and automated editing was performed to clean up areas where dense vegetation partially obscures buildings. The 2014 orthoimagery was used to perform QC of the building outlines. Limitations – The building classification was performed on structures that are 10-ft or taller to eliminate the inclusion of dumpsters, semi-trailers, small sheds, and other non-permanent infrastructure that was captured in the point cloud. Structures under 10-ft in height are not represented in the building outline dataset. In areas where dense vegetation completely overhangs small buildings, the classification procedure may have correctly classified points as vegetation. Buildings do not exist in the building dataset where the overhanging vegetation is classified as vegetation in the point cloud.]
Temporal Extent
Currentness Reference
ground condition
Time Instant
2016-01-01T00:00:00
Temporal Extent
Time Instant
2016-01-01T00:00:00
Bounding Box
West
-88.047445
East
-87.505089
North
44.329611
South
43.889563
Bounding Box
West
-88.047806
East
-87.50758
North
44.329723
South
43.889079
ISO Topic Category
structure
Place Keyword
Manitowoc County
Wisconsin
Place Keyword Thesaurus
GNS
Theme Keyword
Point
Theme Keyword Thesaurus
FGDC
Theme Keyword
Buildings
Theme Keyword Thesaurus
LCSH
Resource Constraints
Use Limitation
[None. However, temporal changes to the Earth's surface and land cover may have occurred since the acquisition of the lidar data and may no longer represent current bare earth and planimetric surface conditions.]
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. [Distributor assumes no liability for misuse of data.]
Other Restrictions
[Any and all accessibility to data of or pertaining to the 2015 building dataset is to be determined by Manitowoc County.]
Status
completed
Maintenance and Update Frequency
notPlanned
Language
eng
Credit
Manitowoc County
Point of Contact
Contact
Cathy DeLain
Position Name
GIS Coordinator
Delivery Point
1024 South 9th Street
City
Manitowoc
Administrative Area
WI
Postal Code
54220
Country
U.S.A.
Email
cathydelain@co.manitowoc.wi.us
Phone
920-683-2781

Spatial Reference Information

Reference System Identifier
Code
7614
Code Space
EPSG
Version
9.1

Data Quality Information

Quantitative Attribute Accuracy Report
Absolute External Positional Accuracy
Quantitative Attribute Accuracy Report
Lineage
Process Step
Description
[LiDAR processing utilizes several software packages, including GeoCue and the TerraSolid suite of processing components. The GeoCue software is a database management system for housing the LiDAR dataset (usually multiple gigabytes in size). GeoCue incorporates a thorough checklist of processing steps and quality assurance/quality control (QA/QC) procedures that assist in the LiDAR workflow. The TerraSolid software suite is used to automate the initial classification of the LiDAR point cloud based on a set of predetermined parameters. Lidar technicians refer to ground cover research (natural and cultural features) within the project area and determine algorithms most suitable for the initial automated LiDAR classification. (Some algorithms/filters recognize the ground in forests well, while others have greater capability in urban areas). During this process each point is given an initial classification (e.g., as ground, vegetation, or noise) based on the point's coordinates and the relation to its neighbors. Classifications to be assigned include all those outlined by ASPRS standards. The initial classifications produce a coarse and inexact dataset, but offer an adequate starting point for the subsequent manual classification procedure. During this step, "overlap" points are automatically classified (those originating from neighboring flightlines) using information gathered from the ABGPS and IMU data. Any duplicate points existing from adjacent flightlines are removed during this process. Hydrographic breaklines are collected using LiDARgrammetry to ensure hydroflattened water surfaces. This process involves manipulating the LiDAR data's intensity information to create a metrically sound stereo environment. From this generated "imagery", breaklines are photogrammetrically compiled. Breakline polygons are created to represent open water bodies. The LiDAR points that fall within these areas are classified as "water." All hydrographic breaklines include a 0.3 meter buffer, with the Class 2 (bare earth) points being re-classified as Class 10 (ignored ground). TerraSolid is further used for the subsequent manual classification of the LiDAR points allowing technicians to view the point cloud in a number of ways to ensure accuracy and consistency of points and uniformity of point coverage. Mathematical algorithms in conjunction with additional manual lidar edits were used to extract building footprints from the lidar point cloud. The 2014 orthoimagery was used to perform QC of the building outlines.]

Distribution Information

Format Name
Shapefile
Format Version
1.0
Distributor
University of Wisconsin-Madison
Distributor
Manitowoc County
Online Access
https://gisdata.wisc.edu/public/Manitowoc_Buildings_2016.zip
Protocol
WWW:DOWNLOAD-1.0-http--download
Name
GeoData@Wisconsin
Function
download

Spatial Representation Information

Vector
Topology Level
geometryOnly
Vector Object Type
composite
Vector Object Count
27707

Metadata Reference Information

Hierarchy Level
dataset
Metadata File Identifier
66DF3C65-80D3-4233-B936-2E3D6DBE0B87
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
2017-07-18
Metadata Standard Name
ISO 19139 Geographic Information - Metadata - Implementation Specification
Metadata Standard Version
2007
Character Set
utf8
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