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Short Citation:
OCM Partners, 2023: Saginaw Bay, MI LiDAR, https://www.fisheries.noaa.gov/inport/item/49801.

Item Identification

Title: Saginaw Bay, MI LiDAR
Short Name: mi2011_usgs_saginawbay_m4807_metadata
Status: Completed
Publication Date: 2015-02-09
Abstract:

TASK NAME:(NRCS) Saginaw Bay, MI LiDAR

LiDAR Data Acquisition and Processing Production Task

USGS Contract No. G10PC00057

Task Order No. G11PD01254

Woolpert Order No. 071804

CONTRACTOR: Woolpert, Inc.

LiDAR data is a remotely sensed high resolution elevation data collected by an airborne platform. The LiDAR sensor uses a combination of laser range finding, GPS positioning, and inertial measurement technologies. The LiDAR systems collect data point clouds that are used to produce highly detailed Digital Elevation Models (DEMs) of the earth's terrain, man-made structures, and vegetation. The task required the LiDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meter. The final products include first, last, and at least one intermediate return LAS, full classified LAS and one (1) meter pixel raster DEMs of the bare-earth surface in ERDAS IMG Format. The LiDAR data was acquired on November 18, 2011, November 21, 2011, November 22, 2011, November 23, 2011, December 26, 2011, April 4, 2012, April 5, 2012, and April 6, 2012.

Purpose:

This task order consisted of LiDAR data acquisition and processing for the USGS. The task required the LiDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meter. The LiDAR data was collected to meet a vertical accuracy requirement of 18.2cm (0.6 ft) RMSE. The LiDAR data was provided in 1,000 meters x 1,000 meters tiles in the UTM projection. The LiDAR tile file name was derived from the southwest corner of each tile. The tiles are named based on the US National Grid.

Notes:

10446

Supplemental Information:

A report for this project is available at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4807/supplemental/mi2011_usgs_saginawbay_m4807_surveyreport.pdf

A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4807/supplemental/mi2011_usgs_saginawbay_m4807.kmz

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None Ground
None Terrain

Temporal Keywords

Thesaurus Keyword
UNCONTROLLED
None 2011
None 2012
None April
None November

Physical Location

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

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: las
Entity Attribute Overview:

LAS 1.2 format (classes 1,2,5,6,7,9,10,17,18)

Entity Attribute Detail Citation:

none

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of Woolpert, USGS, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 677793
Date Effective From: 2015-02-09
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: 677795
Date Effective From: 2015-02-09
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: 677796
Date Effective From: 2015-02-09
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: 677794
Date Effective From: 2015-02-09
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: 1136550
W° Bound: -84.17113
E° Bound: -82.82784
N° Bound: 44.07465
S° Bound: 43.22019

Extent Group 1 / Time Frame 1

CC ID: 1136542
Time Frame Type: Discrete
Start: 2011-11-18

Extent Group 1 / Time Frame 2

CC ID: 1136543
Time Frame Type: Discrete
Start: 2011-11-21

Extent Group 1 / Time Frame 3

CC ID: 1136544
Time Frame Type: Discrete
Start: 2011-11-22

Extent Group 1 / Time Frame 4

CC ID: 1136545
Time Frame Type: Discrete
Start: 2011-11-23

Extent Group 1 / Time Frame 5

CC ID: 1136546
Time Frame Type: Discrete
Start: 2011-12-26

Extent Group 1 / Time Frame 6

CC ID: 1136547
Time Frame Type: Discrete
Start: 2012-04-04

Extent Group 1 / Time Frame 7

CC ID: 1136548
Time Frame Type: Discrete
Start: 2012-04-05

Extent Group 1 / Time Frame 8

CC ID: 1136549
Time Frame Type: Discrete
Start: 2012-04-06

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL:

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4807

The data set is dynamically generated based on user-specified parameters.;

Data Access Constraints:

None

Data Use Constraints:

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 it's limitations.

Distribution Information

Distribution 1

CC ID: 741416
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4807
Distributor:
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

Distribution 2

CC ID: 741417
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4807/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741419
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741420
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 741421
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4807/supplemental/mi2011_usgs_saginawbay_m4807.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for the 2011 Saginaw Bay, MI lidar collection.

Activity Log

Activity Log 1

CC ID: 677823
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 677822
Activity Date/Time: 2017-11-14
Description:

Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 718371
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741418
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; TerraSolid LTD: Terrascan Version 11.01

Data Quality

Horizontal Positional Accuracy:

Horizontal accuracy is +/- 1.158 meters at the 95% confidence level.; Quantitative Value: 1.158 meters, Test that produced the value: 115.8 cm at 2 sigma

Vertical Positional Accuracy:

LAS data covering the Saginaw Bay, MI Lidar Task Order was compared to survey control points to determine the FVA of the LAS Swath and of the Bare-Earth DEM. In addition, this LAS data was compared to supplemental points from categories: Bare Earth Open Terrain, Urban, Tall Weeds/Crops, Brush Lands and Trees, and Forested Fully Grown. LAS Swath Fundamental Vertical Accuracy (FVA) Tested 0.135m (13.5cm) fundamental vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.069m (6.9cm)(Rmse(z) x 1.96000. Bare-Earth DEM Fundamental Vertical Accuracy (FVA) Tested 0.135m (13.5cm) fundamental vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.069m (6.9cm)(Rmse(z) x 1.96000.; Quantitative Value: 0.135 meters, Test that produced the value: LAS Swath Fundamental Vertical Accuracy (FVA) Tested 0.135 meters fundamental vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using Rmse(z) x 1.96000. Tested against the TIN.; Quantitative Value: 0.135 meters, Test that produced the value: Bare-Earth DEM Fundamental Vertical Accuracy (FVA) Tested 0.135 meters fundamental vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using Rmse(z) x 1.96000. Tested against the DEM.; Quantitative Value: 0.094 meters, Test that produced the value: Urban Land Cover Classification Supplemental Vertical Accuracy (SVA) Tested 0.094 meters supplemental vertical accuracy at the 95th percentile in Urban.

Urban Errors larger than 95th percentile include:

Point 1000, Easting 249818.246, Northing 4823886.202, Z-Error -0.158

Point 1096, Easting 348082.817, Northing 4879853.196, Z-Error 0.096; Quantitative Value: 0.187 meters, Test that produced the value: Tall Weeds/Crops Land Cover Classification Supplemental Vertical Accuracy (SVA) Tested 0.187 meters supplemental vertical accuracy at the 95th percentile in Tall Weeds/Crops. Tested against the DEM. Tall Weeds/Crops Errors larger than 95th percentile include:

Point 1097, Easting 347039.895, Northing 4874313.189, Z-Error 0.190; Quantitative Value: 0.19 meters, Test that produced the value: Brush Lands and Trees Land Cover Classification Supplemental Vertical Accuracy (SVA) Tested 0.190 meters supplemental vertical accuracy at the 95th percentile in Brush Lands and Trees. Tested against the DEM. Brush Lands and Trees Errors larger than 95th percentile include:

Point 1106, Easting 340205.979, Northing 4876629.209, Z-Error 0.195; Quantitative Value: 0.185 meters, Test that produced the value: Forested and Fully Grown Land Cover Classification Supplemental Vertical Accuracy (SVA) Tested 0.185 meters supplemental vertical accuracy at the 95th percentile in Forested and Fully Grown. Tested against the DEM. Forested and Fully Grown Errors larger than 95th percentile include:

Point 1053, Easting 308654.86, Northing 4811815.512, Z-Error 0.186; Quantitative Value: 0.147 meters, Test that produced the value: Consolidated Vertical Accuracy (CVA) Tested 0.147 meters consolidated vertical accuracy at the 95th percentile level, derived according to ASPRS Guidelines for Vertical Accuracy Reporting for LiDAR Data. Tested against the DEM. Based on the 95th percentile error in all land cover categories combined.

Point 1000, Easting 249818.246, Northing 4823886.202, Z-Error -0.158

Point 1064, Easting 301227.146, Northing 4842391.352, Z-Error 0.150

Point 1051, Easting 308604.52, Northing 4811720.133, Z-Error 0.181

Point 1053, Easting 308654.86, Northing 4811815.512, Z-Error 0.186

Point 1097, Easting 347039.895, Northing 4874313.189, Z-Error 0.190

Point 1106, Easting 340205.979, Northing 4876629.209, Z-Error 0.195

Completeness Report:

The LiDAR data is visually inspected for completeness to ensure that are no gaps between flight lines.

Conceptual Consistency:

All formatted data are validated using commercial GIS software to ensure proper formatting and loading prior to delivery.

Lineage

Process Steps

Process Step 1

CC ID: 1136536
Description:

Using Leica ALS50, ALS60 and ALS70 (LiDAR) systems , 200 flight lines of high density data, at a nominal pulse spacing (NPS) of 0.7 meter, were collected for the SAGINAW BAY, MI (approximately 1631 square miles). Data Acquisition Height = 6,500 feet AGL - Aircraft Speed = 130 Knots. Multiple returns were recorded for each laser pulse along with an intensity value for each return. A total of thirteen (13) missions were flown during a period of November 18 , 2011 through April 06, 2012. A single airborne global positioning system (GPS) base station was used in support of the LiDAR data acquisition. 40 ground control points were surveyed through static methods. The geoid used to reduce satellite derived elevations to orthometric heights was Geoid09. Data for the task order is referenced to the UTM Zone 17N, North American Datum of 1983 (NAD83), and NAVD88, in Meters. Airborne GPS data was differentially processed and integrated with the post processed IMU data to derive a smoothed best estimate of trajectory (SBET). The SBET was used to reduce the LiDAR slant range measurements to a raw reflective surface for each flight line. The coverage was classified to extract a bare earth digital elevation model (DEM) and separate last returns. In addition to the LAS deliverables, one layer of coverage was delivered in the IMG Format: bare-earth.

Process Date/Time: 2011-11-18 00:00:00

Process Step 2

CC ID: 1136537
Description:

The ALS50, ALS60 and ALS70 calibration and system performance is verified on a periodic basis using Woolpert's calibration range. The calibration range consists of a large building and runway. The edges of the building and control points along the runway have been located using conventional survey methods. Inertial measurement unit (IMU) misalignment angles and horizontal accuracy are calculated by comparing the position of the building edges between opposing flight lines. The scanner scale factor and vertical accuracy is calculated through comparison of LiDAR data against control points along the runway. Field calibration is performed on all flight lines to refine the IMU misalignment angles. IMU misalignment angles are calculated from the relative displacement of features within the overlap region of adjacent (and opposing) flight lines. The raw LiDAR data is reduced using the refined misalignment angles.

Process Step 3

CC ID: 1136538
Description:

Once the data acquisition and GPS processing phases are complete, the LiDAR data was processed immediately to verify the coverage had no voids. The GPS and IMU data was post processed using differential and Kalman filter algorithms to derive a best estimate of trajectory. The quality of the solution was verified to be consistent with the accuracy requirements of the project.

Process Date/Time: 2011-11-19 00:00:00

Process Step 4

CC ID: 1136539
Description:

The individual flight lines were inspected to ensure the systematic and residual errors have been identified and removed. Then, the flight lines were compared to adjacent flight lines for any mismatches to obtain a homogenous coverage throughout the project area. The point cloud underwent a classification process to determine bare-earth points and non-ground points utilizing "first and only" as well as "last of many" LiDAR returns. This process determined bare-earth points (Class 2), High Vegetation (Class 5), Building (Class 6), Noise (Class 7), Water (Class 9) Ignored ground (Class 10), Overlap Default (Class 17), and Overlap Ground (Class 18)and unclassified data (Class 1). The bare-earth (Class 2 - Ground) LiDAR points underwent a manual QA/QC step to verify that artifacts have been removed from the bare-earth surface. The surveyed ground control points are used to perform the accuracy checks and statistical analysis of the LiDAR dataset.

Process Date/Time: 2012-05-01 00:00:00

Process Step 5

CC ID: 1136540
Description:

The NOAA Office for Coastal Management (OCM) received the files in laz format from USGS via an FTP online repository. The files contained lidar elevation and intensity measurements. The data were in UTM Zone 17, NAVD88 (orthometric) heights in meters. OCM performed the following processing for data storage and Digital Coast provisioning purposes:

1. The data were converted from UTM coordinates to geographic coordinates.

2. The data were converted from NAVD88 (orthometric) heights in meters to GRS80 (ellipsoid) heights in meters using Geoid 09.

3. The LAS data were sorted by latitude and the headers were updated.

4. Erroneous elevations were removed.

Process Date/Time: 2015-01-15 00:00:00

Catalog Details

Catalog Item ID: 49801
GUID: gov.noaa.nmfs.inport:49801
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:22+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+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