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Short Citation:
OCM Partners, 2023: 2010 USGS Lidar: Brown County, WI, https://www.fisheries.noaa.gov/inport/item/58889.

Item Identification

Title: 2010 USGS Lidar: Brown County, WI
Short Name: wi2010_brown_m9028_metadata
Status: Completed
Creation Date: 2020
Publication Date: 2019-08-21
Abstract:

This dataset includes LiDAR data collected in April 2010 at a nominal pulse spacing of 1.2 meters for all of Brown County, Wisconsin and a portion of neighboring Oconto County. The dataset includes the raw point clouds, classified point clouds, and bare earth point cloud as well as derivative products including the DTM (Digital Terrain Model), DEM (Digital Elevation Model), Hydro-Flattened DEM, and 2’ contours. The specifications of this project are based on the Base LiDAR Specification, Version 12, as set forth by the US Geological Survey: National Geospatial Program. Quality Assurance procedures conducted by the Brown County Surveyor in Fall of 2010 showed that the “bare earth” terrain model had an RMSE Z of 0.207 feet (6.3 cm) and the NSSDA Accuracy (Z) is 0.405(12.3 cm).

The NOAA Office for Coastal Management (OCM) downloaded the laz files from this USGS site

ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/ARRA-WI_BrownCo_2010 and processed the data to the Data Access Viewer (DAV) and to https.

Purpose:

The purpose of this dataset is to provide detailed, accurate elevation data for inclusion in the USGS National Map as well as the Brown County Geographic Information System (GIS). These data will be disseminated and used to support a wide array of applications including FEMA floodplain mapping, storm water management, transportation and communication infrastructure planning, construction planning & 3D visualization, environmental protection, wetland & habitat restoration, pollution abatement, and renewable energy development.

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
ISO 19115 Topic Category
elevation
UNCONTROLLED
None beach
None erosion

Temporal Keywords

Thesaurus Keyword
UNCONTROLLED
None 2010
None April

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WISCONSIN
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE
UNCONTROLLED
None Continent > North America > United States Of America > Wisconsin > Brown County

Instrument Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Instrument Keywords
LIDAR > Light Detection and Ranging

Platform Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Platform Keywords
Airplane > Airplane

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Elevation
Maintenance Frequency: None Planned
Data Presentation Form: Model (digital)
Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of Brown County, WI, Green Bay Metropolitan Sewerage District, Ayres Associates, USGS, NOAA, the Office for Coastal Management or its partners.

Data Set Credit: United States Geological Survey (USGS), Brown County WI, Green Bay Metropolitan Sewerage District, Ayres Associates, Inc.

Support Roles

Data Steward

CC ID: 897747
Date Effective From: 2020
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 897748
Date Effective From: 2020
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 897749
Date Effective From: 2020
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 897750
Date Effective From: 2020
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1143880
W° Bound: -88.255939
E° Bound: -87.762506
N° Bound: 44.681837
S° Bound: 44.240384

Extent Group 1 / Time Frame 1

CC ID: 1143879
Time Frame Type: Discrete
Start: 2010
Description:

April 2010

Spatial Information

Spatial Representation

Representations Used

Grid: No
Vector: Yes
Text / Table: No
TIN: No
Stereo Model: No
Video: No

Reference Systems

Reference System 1

CC ID: 1143877

Coordinate Reference System

CRS Type: Geographic 3D
EPSG Code: EPSG:6319
EPSG Name: NAD83(2011)
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Access Procedure:

Data is available online for bulk and custom downloads.

Data Access Constraints:

None

Data Use Constraints:

Data not intended to replace a field survey. LiDAR data should be verified and/or supplemented by a Registered Land Surveyor prior to use in engineering and other specific applications. Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations.

Distribution Information

Distribution 1

CC ID: 897751
Start Date: 2020-02-21
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9028
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2020 - Present)
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Change to an orthometric vertical datum is one of the many options.

File Type (Deprecated): Zip
Compression: Zip

Distribution 2

CC ID: 897752
Start Date: 2020-02-21
End Date: Present
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9028/index.html
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2020 - Present)
File Name: Bulk Download
Description:

Bulk download of data files in LAZ format, geographic coordinates, orthometric heights. Note that the vertical datum (hence elevations) of the files here are different than described in this document. They will be in an orthometric datum.

File Type (Deprecated): LAZ
Distribution Format: LAS/LAZ - LASer
Compression: Zip

URLs

URL 1

CC ID: 897754
URL: https://coast.noaa.gov/dataviewer/
Name: NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV)
URL Type:
Online Resource
File Resource Format: HTML
Description:

The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer.

URL 2

CC ID: 897755
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9028/supplemental/wi2010_brown_m9028.kmz
Name: Browse graphic
URL Type:
Browse Graphic
File Resource Format: KML
Description:

This graphic displays the footprint for this lidar data set.

URL 3

CC ID: 897756
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9028/supplemental/ARRA-WI_BrownCo_2010.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

URL 4

CC ID: 897757
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9028/supplemental/LiDAR_QA_report.docx
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

Data Quality

Horizontal Positional Accuracy:

All data products were acquired at 1700 meters above mean terrain (AMT) with a nominal point spacing of 1.2 meters.

Vertical Positional Accuracy:

The contractor reported a Fundamental Vertical Accuracy (FVA) of the Classified Bare Earth for the Brown County project achieved 0.604 feet at a 95% confidence level in the "Open Terrain" land cover category. 521 control points were used in this evaluation by the contractor.

Brown County performed its own Quality Assurance procedure: GNSS observations were made on October 8,9 and 10, 2010 by Brown County Surveyor Patrick Ford and Anthony Huberty, RLS. A Trimble R8 GNSS Model 3 rover receiver and TSC2 Survey Controller linked to the Wisconsin Department of Transportation Virtual Reference Network was used. Including check points and other points of value, 93 points were observed over the 3 days. The survey style was set to “Topo” for the point observations with the tolerances set at 0.006m (0.02’) horizontal and 0.009m (0.03’) vertical and points were occupied until enough data had been collected to satisfy the minimum requirements. No unusual events were recorded during any of the observations. Trimble Geomatics Office software was used to download the GNSS observations. O points were flagged as having RMS outside tolerances. There were no calibrations or adjustments made to the GNSS observations. Experience has shown that observations made with the Virtual Reference System do not typically produce horizontal errors greater than +/- 0.15’ and limited vertical work showed differences from the Federal bench marks in the +/- 0.07 magnitude. ArcMap was used to combine the Global Navigation Satellite System (GNSS) points with the LiDAR data. The “Identify” tool was set to identify data on visible layers, the GNSS points were picked and the elevations returned from the Brown County LiDAR Terrain layer were captured. An Excel spreadsheet for determining the Vertical Accuracy was downloaded form the Federal Geodetic Data Committee (FGDC) and was populated with the elevations from the LiDAR terrain data and the elevations obtained in the GNSS observations. Elevations were entered in feet to the nearest 0.01 feet. All data entered into the spreadsheet was double-checked for accuracy. The resulting RMSE(z) is 0.207 ft and the NSSDA (Z) accuracy is 0.405 ft. For a 2 foot contour interval “ASPRS Guidelines Vertical Accuracy Reporting for LiDAR Data” requires an RMSE(z) of 0.61 and an NSSDA(z) of 1.19, so this data clearly meets the specifications of the project.

Data Management

Have Resources for Management of these Data Been Identified?: Yes
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: Yes
Actual or Planned Long-Term Data Archive Location: NCEI-CO
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

Data is backed up to tape and to cloud storage.

Lineage

Sources

Data collection and processing

CC ID: 1143874
Contact Role Type: Originator
Contact Type: Organization
Contact Name: Ayres

Process Steps

Process Step 1

CC ID: 1143875
Description:

The LiDAR data was captured using an Aero Commander 500 Shrike, Piper Navajo 310, and Cessna 320 Skynight (twin-piston), fixed wing aircraft equipped with a LiDAR system. The LiDAR system includes a differential GPS unit and inertial measurement system to provide superior accuracy.

Acquisition parameters:

1. Scanner - ALTM Gemini LiDAR

2. Flight Height - 1700 meters above mean terrain

3. Swath Width - 32 degrees

4. Sidelap - 50%

5. Nominal Post Spacing - 1.2m

GPS and IMU processing parameters:

1. Processing Programs and version - Applanix POSPac, version 4.4

2. Maximum baseline length - Not greater than 40km.

3. Number of base stations during LiDAR collection - A minimum of 3.

4. Max separation between base stations during LiDAR collection - 0.10m

5. IMU processing monitored for consistency and smoothness - Yes.

Point Cloud Processing:

1. Program and version - Optech ASDA Processor

2. Horizontal Datum - NAD83

3. Horizontal Coordinates - WISCRS Brown County, in US Survey Feet.

4. Vertical Datum - NAVD88

5. Geoid Model used to reduce satellite derived elevations to orthometric heights - NGS Geoid09.

LIDAR Processing:

1. Processing Programs and versions - TerraSolid TerraScan (version 010.017), TerraModeler (version 010.005 and TerraMatch (version 010.011) and Intergraph MicroStation (version.08.05.02.55).

2. Point Cloud data is imported to TerraScan in a Microstation V8 (V) CAD environment on a specified 5000 foot by 5000 foot tiling scheme.

3. Analyze the data for overall completeness and consistency. This is to ensure that there are no voids in the data collection.

4. Inspect for calibration errors in the dataset using the TerraMatch software. This is accomplished by sampling the data collected accross all flight lines and classify the idividual lines to ground. The software will use the ground-classified lines to compute corrections (Heading, Pitch, Roll, and Scale).

5. Orientation corrections (i.e. Calibration corrections) are then applied (if needed) to the entire dataset.

6. Automatic and manual ground classification is performed using algorithms with customized parameters to best fit the project area.

7. The Ayres/Aerometric team captured QA/QC points in 'open terrian' land cover category that were used to test the accuracy of the LiDAR ground surface. TerraScan's Output Control Report (OCR) was used to compare the QAQC data to the LIDAR data. This routine searches the LIDAR dataset by X and Y coordinate, finds the closest LIDAR point and compares the vertical (Z) values to the known data collected in the field. Based on the QAQC data, a bias adjustment was determined, and the results were applied to the LIDAR data. A final OCR was performed with a resulting RMSE of 0.308 ft for the project.

8. Once the automatic processing and testing of LiDAR is complete, the bare-earth surface data was closely inspected to insure that proper classification was achieved as part of a Quality Control process.

9. Final deliverables are generated and output to a client specified PLSS tiling scheme.

Process Date/Time: 2010-04-17 00:00:00

Process Step 2

CC ID: 1143876
Description:

The NOAA Office for Coastal Management (OCM) downloaded 573 laz files from ftp://rockyftp.cr.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/ARRA-WI_BrownCo_2010

The files contained elevation and intensity measurements for the Brown County, WI project area. The data were in WI County Reference System, Brown County, NAD83 HARN, US survey feet coordinates and NAVD88 (Geoid09) elevations in feet. The data were classified as: 1 - Unclassified, 2 - Ground, 7 - Noise, 8 - Model Key Points, 9 - Water, 10 - Ignored Ground. The NOAA Office for Coastal Management processed all classifications of points to the Digital Coast Data Access Viewer (DAV). Classes available on the DAV are: 1, 2, 7, 8, 9, 10.

OCM performed the following processing on the data for Digital Coast storage and provisioning purposes:

1. An internal OCM script was run to check the number of points by classification and by flight ID and the gps and intensity ranges.

2. Internal OCM scripts were run on the laz files to convert from orthometric (NAVD88) elevations to ellipsoid elevations using the Geoid 09 model, to convert from WI County Reference System, Brown County, NAD83 HARN, US survey feet coordinates to geographic coordinates, to convert from elevations in feet to meters, to assign the geokeys, to sort the data by gps time and zip the data to database and to http.

Process Date/Time: 2020-02-21 00:00:00
Process Contact: Office for Coastal Management (OCM)

Catalog Details

Catalog Item ID: 58889
GUID: gov.noaa.nmfs.inport:58889
Metadata Record Created By: Rebecca Mataosky
Metadata Record Created: 2020-02-21 14:25+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-10-17 16:12+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16