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Data Set Info
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Spatial Info
Access Info
Distribution Info
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Catalog Details

Summary

Short Citation
OCM Partners, 2025: 2022 - 2023 USGS Lidar: Central Mississippi River, MN, https://www.fisheries.noaa.gov/inport/item/73145.
Full Citation Examples

Abstract

Product: Processed, classified lidar point cloud data tiles in LAZ 1.4

Geographic Extent: Approximately 10,966 square miles in southeast Minnesota.

MN_CentralMissRiver_1 (Work Unit 230948) - covering approximately 495 square miles

MN_CentralMissRiver_2 (Work Unit 300156) - covering approximately 2621 square miles

MN_CentralMissRiver_3 (Work Unit 300157) - covering approximately 2786 square miles

MN_CentralMissRiver_4 (Work Unit 300158) - covering approximately 1199 square miles

MN_CentralMissRiver_5 (Work Unit 300159) - covering approximately 1897 square miles

MN_CentralMissRiver_6 (Work Unit 300160) - covering approximately 1968 square miles

Dataset Description of Original Data: MN Central Miss River 1 B22 lidar project called for the planning, acquisition, processing, and production of derivative products of QL1 lidar data to be collected an aggregate nominal pulse spacing (ANPS) of 0.18-meters and 30 points per square meter (ppsm). Project specifications were based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 2022 revision A. The data was developed based on a horizontal reference system of NAD83 (2011) UTM 15 meters (EPSG 6344) and a vertical reference system of NAVD88 (GEOID18) meters. Lidar data was delivered as processed LAZ 1.4 files formatted to individual 500-meters x 500-meters tiles.

Ground Conditions of Original Data: Lidar was collected from May 4, 2022, through May 17, 2023 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, Woolpert established ground control points that were used to calibrate the lidar to known ground locations established throughout the entire project area. An additional independent accuracy checkpoints were collected throughout the entire project area and used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.

This metadata record supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the Entwine Point Tiles (EPT) hosted by USGS on Amazon Web Services.

Distribution Information

  • Not Applicable

    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.

  • LAS/LAZ - LASer

    Bulk download of data files in LAZ format, UTM Zone 15 NAD83 (2011), meters coordinates and NAVD88 (Geoid18) elevations in meters

Access Constraints:

None

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 its limitations.

Controlled Theme Keywords

elevation, TERRAIN ELEVATION

Child Items

No Child Items for this record.

Contact Information

Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov

Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov

Extents

Geographic Area 1

-95.16° W, -92.62° E, 46.37° N, 44.44° S

Time Frame 1
2022-05-23 - 2022-06-02

Dates of collection for MN_CentralMissRiver_2

Time Frame 2
2022-05-14 - 2022-05-27

Dates of collection for MN_CentralMissRiver_1

Time Frame 3
2022-05-27 - 2023-05-17

Dates of collection for MN_CentralMissRiver_3

Time Frame 4
2022-05-04 - 2022-05-24

Dates of collection for MN_CentralMissRiver_4

Time Frame 5
2022-05-13 - 2022-05-24

Dates of collection for MN_CentralMissRiver_5

Time Frame 6
2022-05-10 - 2022-05-23

Dates of collection for MN_CentralMissRiver_6

Item Identification

Title: 2022 - 2023 USGS Lidar: Central Mississippi River, MN
Short Name: mn2022_cent_rvr_m10154_metadata
Status: Completed
Publication Date: 2023-02-22
Abstract:

Product: Processed, classified lidar point cloud data tiles in LAZ 1.4

Geographic Extent: Approximately 10,966 square miles in southeast Minnesota.

MN_CentralMissRiver_1 (Work Unit 230948) - covering approximately 495 square miles

MN_CentralMissRiver_2 (Work Unit 300156) - covering approximately 2621 square miles

MN_CentralMissRiver_3 (Work Unit 300157) - covering approximately 2786 square miles

MN_CentralMissRiver_4 (Work Unit 300158) - covering approximately 1199 square miles

MN_CentralMissRiver_5 (Work Unit 300159) - covering approximately 1897 square miles

MN_CentralMissRiver_6 (Work Unit 300160) - covering approximately 1968 square miles

Dataset Description of Original Data: MN Central Miss River 1 B22 lidar project called for the planning, acquisition, processing, and production of derivative products of QL1 lidar data to be collected an aggregate nominal pulse spacing (ANPS) of 0.18-meters and 30 points per square meter (ppsm). Project specifications were based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 2022 revision A. The data was developed based on a horizontal reference system of NAD83 (2011) UTM 15 meters (EPSG 6344) and a vertical reference system of NAVD88 (GEOID18) meters. Lidar data was delivered as processed LAZ 1.4 files formatted to individual 500-meters x 500-meters tiles.

Ground Conditions of Original Data: Lidar was collected from May 4, 2022, through May 17, 2023 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, Woolpert established ground control points that were used to calibrate the lidar to known ground locations established throughout the entire project area. An additional independent accuracy checkpoints were collected throughout the entire project area and used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.

This metadata record supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the Entwine Point Tiles (EPT) hosted by USGS on Amazon Web Services.

Purpose:

This project will support the 3DEP mission, the Natural Resources Conservation Service (NRCS) high-resolution elevation enterprise, and many state and local agencies.

Supplemental Information:

USGS Contract No. 140G0221D0013, Task Order No. 140G0222F0098, Project Name: MN Central Miss River B22. Contractor: Woolpert.

The following are the USGS lidar fields in JSON:

{

"ldrinfo" : {

"ldrspec" : "USGS NGP Base Specifications v2022 rev A",

"ldrsens" : "Leica Terrain Mapper",

"ldrmaxnr" : "15",

"ldrnps" : "0.18",

"ldrdens" : "30",

"ldranps" : "0.18",

"ldradens" : "30",

"ldrfltht" : "1,625",

"ldrfltsp" : "130",

"ldrscana" : "40",

"ldrscanr" : "150",

"ldrpulsr" : "2000",

"ldrpulsd" : "5",

"ldrpulsw" : "2.5",

"ldrwavel" : "1064",

"ldrmpia" : "1",

"ldrbmdiv" : "0.25",

"ldrswatw" : "1183",

"ldrswato" : "55",

"ldrgeoid" : "GEOID18"

},

"ldraccur" : {

"ldrchacc" : "0",

"rawnva" : "0",

"rawnvan" : "0",

"clsnva" : "0",

"clsnvan" : "0",

"clsvva" : "0",

"clsvvan" : "0"

},

"lasinfo" : {

"lasver" : "1.4",

"lasprf" : "6",

"laswheld" : "Geometrically unreliable points were identified using a combination of automated and manual techniques and subsequently classified as high or low noise and given the standard Withheld bit.",

"lasolap" : "The overlap bit flag is not to be used for lidar point clouds intended for inclusion in 3DEP data holdings.",

"lasintr" : "16",

"lasclass" : {

"clascode" : "1",

"clasitem" : "Processed but not classified"

},

"lasclass" : {

"clascode" : "2",

"clasitem" : "Bare earth ground"

},

"lasclass" : {

"clascode" : "7",

"clasitem" : "Low Noise"

},

"lasclass" : {

"clascode" : "9",

"clasitem" : "Water"

},

"lasclass" : {

"clascode" : "17",

"clasitem" : "Bridge decks"

},

"lasclass" : {

"clascode" : "18",

"clasitem" : "High noise"

},

"lasclass" : {

"clascode" : "20",

"clasitem" : "Ignored ground"

}

}}

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
ISO 19115 Topic Category
elevation

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 > MINNESOTA
Global Change Master Directory (GCMD) Location Keywords
VERTICAL LOCATION > LAND SURFACE

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 NOAA, the Office for Coastal Management or its partners.

Data Set Credit: Woolpert, USGS

Support Roles

Data Steward

CC ID: 1342595
Date Effective From: 2024
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: 1342594
Date Effective From: 2024
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: 1342614
Date Effective From: 2024
Date Effective To:
Contact (Organization): U.S. Geological Survey
Address: 12201 Sunrise Valley Drive
Reston, VA 20191
USA
URL: USGS Home

Metadata Contact

CC ID: 1342596
Date Effective From: 2024
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: 1342597
Date Effective From: 2024
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: 1342600
W° Bound: -95.16
E° Bound: -92.62
N° Bound: 46.37
S° Bound: 44.44

Extent Group 1 / Time Frame 1

CC ID: 1342625
Time Frame Type: Range
Start: 2022-05-23
End: 2022-06-02
Description:

Dates of collection for MN_CentralMissRiver_2

Extent Group 1 / Time Frame 2

CC ID: 1342599
Time Frame Type: Range
Start: 2022-05-14
End: 2022-05-27
Description:

Dates of collection for MN_CentralMissRiver_1

Extent Group 1 / Time Frame 3

CC ID: 1342626
Time Frame Type: Range
Start: 2022-05-27
End: 2023-05-17
Description:

Dates of collection for MN_CentralMissRiver_3

Extent Group 1 / Time Frame 4

CC ID: 1342627
Time Frame Type: Range
Start: 2022-05-04
End: 2022-05-24
Description:

Dates of collection for MN_CentralMissRiver_4

Extent Group 1 / Time Frame 5

CC ID: 1342628
Time Frame Type: Range
Start: 2022-05-13
End: 2022-05-24
Description:

Dates of collection for MN_CentralMissRiver_5

Extent Group 1 / Time Frame 6

CC ID: 1342629
Time Frame Type: Range
Start: 2022-05-10
End: 2022-05-23
Description:

Dates of collection for MN_CentralMissRiver_6

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: 1342615

Coordinate Reference System

CRS Type: Projected
EPSG Code: EPSG:3857
EPSG Name: WGS 84 / Pseudo-Mercator
See Full Coordinate Reference System Information

Reference System 2

CC ID: 1342616

Coordinate Reference System

CRS Type: Vertical
EPSG Code: EPSG:5703
EPSG Name: NAVD88 height
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:

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: 1342601
Start Date: 2024-07-23
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10154/details/10154
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2024 - 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.

Distribution Format: Not Applicable
Compression: Zip

Distribution 2

CC ID: 1342602
Start Date: 2024
End Date: Present
Download URL: https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/MN_CentralMissRiver_B22/
Distributor: U.S. Geological Survey (2024 - Present)
File Name: Bulk Download
Description:

Bulk download of data files in LAZ format, UTM Zone 15 NAD83 (2011), meters coordinates and NAVD88 (Geoid18) elevations in meters

Distribution Format: LAS/LAZ - LASer
Compression: LAZ

URLs

URL 1

CC ID: 1342592
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: 1342630
URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_1_B22/ept.json
Name: USGS Entwine Point Tile (EPT) - MN_CentralMissRiver_1
URL Type:
Online Resource
File Resource Format: json
Description:

Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud.

URL 3

CC ID: 1342631
URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_2_B22/ept.json
Name: USGS Entwine Point Tile (EPT) - MN_CentralMissRiver_2
URL Type:
Online Resource
File Resource Format: json
Description:

Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud.

URL 4

CC ID: 1342632
URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_3_B22/ept.json
Name: USGS Entwine Point Tile (EPT) - MN_CentralMissRiver_3
URL Type:
Online Resource
File Resource Format: json
Description:

Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud.

URL 5

CC ID: 1342633
URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_4_B22/ept.json
Name: USGS Entwine Point Tile (EPT) - MN_CentralMissRiver_4
Description:

Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud.

URL 6

CC ID: 1342634
URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_5_B22/ept.json
Name: USGS Entwine Point Tile (EPT) - MN_CentralMissRiver_5
URL Type:
Online Resource
File Resource Format: json
Description:

Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud.

URL 7

CC ID: 1342635
URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_6_B22/ept.json
Name: USGS Entwine Point Tile (EPT) - MN_CentralMissRiver_6
URL Type:
Online Resource
File Resource Format: json
Description:

Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud.

URL 9

CC ID: 1342637
URL: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/MN_CentralMissRiver_B22/USGS_MN_CentralMissRiver_B22_Project_Report.pdf
Name: USGS Project Report
URL Type:
Online Resource
File Resource Format: pdf
Description:

Link to the USGS Project Report that provides information about the project, vertical accuracy results, and the point classes and sensors used.

URL 10

CC ID: 1342638
URL: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/MN_CentralMissRiver_B22/
Name: USGS Additional Info
URL Type:
Online Resource
Description:

Link to the reports, breaklines, metadata, and spatial metadata.

URL 11

CC ID: 1342639
URL: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/MN_CentralMissRiver_B22/MN_CentralMissRiver_1_B22/reports/lidar_mapping_report/CentralMissRiver_1_2022_Lidar_Mapping_Report.pdf
Name: Lidar Report - MN_CentralMissRiver_1
URL Type:
Online Resource
File Resource Format: pdf
Description:

Link to the lidar report.

URL 12

CC ID: 1342640
URL: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/MN_CentralMissRiver_B22/MN_CentralMissRiver_2_B22/reports/lidar_mapping_report/CentralMissRiver_2_2022_Lidar_Mapping_Report_WU300156.pdf
Name: Lidar Report - MN_CentralMissRiver_2
URL Type:
Online Resource
File Resource Format: pdf
Description:

Link to the lidar report.

URL 13

CC ID: 1342642
URL: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/MN_CentralMissRiver_B22/MN_CentralMissRiver_3_B22/reports/lidar_mapping_report/MN_CentralMissRiver_3_2022_Lidar_Mapping_Report_WU300157.pdf
Name: Lidar Report - MN_CentralMissRiver_3
URL Type:
Online Resource
File Resource Format: pdf
Description:

Link to the lidar report.

URL 14

CC ID: 1342643
URL: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/MN_CentralMissRiver_B22/MN_CentralMissRiver_4_B22/reports/MN_Central_Miss%20_River_4_2022_Lidar_Mapping_Report.pdf
Name: Lidar Report - MN_CentralMissRiver_4
URL Type:
Online Resource
File Resource Format: pdf
Description:

Link to the lidar report.

URL 15

CC ID: 1342644
URL: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/MN_CentralMissRiver_B22/MN_CentralMissRiver_5_B22/reports/MN_Central_Miss%20_River_5_2022_Lidar_Mapping_Report.pdf
Name: Lidar Report - MN_CentralMissRiver_5
URL Type:
Online Resource
File Resource Format: pdf
Description:

Link to the lidar report.

URL 16

CC ID: 1342645
URL: https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/MN_CentralMissRiver_B22/MN_CentralMissRiver_6_B22/reports/lidar_mapping_report/MN_Central_Miss%20_River_6_2022_Lidar_Mapping_Report.pdf
Name: Lidar Report - MN_CentralMissRiver_6
URL Type:
Online Resource
File Resource Format: pdf
Description:

Link to the lidar report.

Technical Environment

Description:

Microsoft Windows 10 ; ArcMap 10.7; ArcCatalog 10.7; TerraScan ver. 20; TerraModeler ver. 20; LP360.

Data Quality

Horizontal Positional Accuracy:

MN_CentralMissRiver_1 (Work Unit 230948)

This data set was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for a 0.12 m RMSEx / RMSEy. Horizontal Accuracy Class which equates to Positional Horizontal Accuracy = +/- 0.29 m at a 95% confidence level.

MN_CentralMissRiver_2 (Work Unit 300156)

This data set was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for a 0.15 m RMSEx / RMSEy. Horizontal Accuracy Class which equates to Positional Horizontal Accuracy = +/- 0.36 m at a 95% confidence level.

MN_CentralMissRiver_3 (Work Unit 300157)

This data set was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for a 0.15 m RMSEx / RMSEy Horizontal Accuracy Class which equates to Positional Horizontal Accuracy = +/- 0.36 m at a 95% confidence.

MN_CentralMissRiver_4 (Work Unit 300158)

Lidar horizontal accuracy is a function of Global Navigation Satellite System (GNSS) derived positional error, flying altitude, and INS derived attitude error. The obtained RMSEr value is multiplied by a conversion factor of 1.7308 to yield the horizontal component of the National Standards for Spatial Data Accuracy (NSSDA) reporting standard where a theoretical point will fall within the obtained radius 95% of the time. Based on a flying altitude of 910 meters, an IMU error of 0.003 decimal degrees, and a GNSS positional error of 0.018 meters, this project was compiled to meet 0.15 meter horizontal accuracy at the 95% confidence level.

MN_CentralMissRiver_5 (Work Unit 300159)

Lidar horizontal accuracy is a function of Global Navigation Satellite System (GNSS) derived positional error, flying altitude, and INS derived attitude error. The obtained RMSEr value is multiplied by a conversion factor of 1.7308 to yield the horizontal component of the National Standards for Spatial Data Accuracy (NSSDA) reporting standard where a theoretical point will fall within the obtained radius 95% of the time. Based on a flying altitude of 1,750 meters, an IMU error of 0.003 decimal degrees, and a GNSS positional error of 0.018 meters, this project was compiled to meet 0.16 meter horizontal accuracy at the 95% confidence level.

MN_CentralMissRiver_6 (Work Unit 300160)

Lidar horizontal accuracy is a function of Global Navigation Satellite System (GNSS) derived positional error, flying altitude, and INS derived attitude error. The obtained RMSEr value is multiplied by a conversion factor of 1.7308 to yield the horizontal component of the National Standards for Spatial Data Accuracy (NSSDA) reporting standard where a theoretical point will fall within the obtained radius 95% of the time. Based on a flying altitude of 1,750 meters, an IMU error of 0.003 decimal degrees, and a GNSS positional error of 0.018 meters, this project was compiled to meet 0.16 meter horizontal accuracy at the 95% confidence level.

Vertical Positional Accuracy:

This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class.

USGS Determined Vertical Accuracy:

Tested NVA RMSEz = 3.18 cm

Tested 95th percentile value for VVA is : 15 cm

For more information see the USGS project report and the lidar reports. The links to these reports are provided in the URL section of this metadata record.

Completeness Report:

These LAS data files include all data points collected. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist.

Conceptual Consistency:

Data covers the entire area specified for this 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-NC
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

Data is backed up to cloud storage.

Lineage

Lineage Statement:

The NOAA Office for Coastal Management (OCM) ingested references to the USGS Entwine Point Tiles (EPT) hosted on Amazon Web Services (AWS) into the Digital Coast Data Access Viewer (DAV). The DAV accesses the point cloud as it resides on AWS under the usgs-lidar-public-container.

Sources

USGS AWS Entwine Point Tile (EPT) - MN_CentralMissRiver_1

CC ID: 1342617
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: USGS
Citation URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_1_B22/ept.json
Citation URL Name: Entwine Point Tile for MN_CentralMissRiver_1

USGS AWS Entwine Point Tile (EPT) - MN_CentralMissRiver_2

CC ID: 1342618
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: USGS
Citation URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_2_B22/ept.json
Citation URL Name: Entwine Point Tile for MN_CentralMissRiver_2

USGS AWS Entwine Point Tile (EPT) - MN_CentralMissRiver_3

CC ID: 1342619
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: USGS
Citation URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_3_B22/ept.json
Citation URL Name: Entwine Point Tile for MN_CentralMissRiver_3

USGS AWS Entwine Point Tile (EPT) - MN_CentralMissRiver_4

CC ID: 1342620
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: USGS
Citation URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_4_B22/ept.json
Citation URL Name: Entwine Point Tile for MN_CentralMissRiver_4

USGS AWS Entwine Point Tile (EPT) - MN_CentralMissRiver_5

CC ID: 1342621
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: USGS
Citation URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_5_B22/ept.json
Citation URL Name: Entwine Point Tile for MN_CentralMissRiver_5

USGS AWS Entwine Point Tile (EPT) - MN_CentralMissRiver_6

CC ID: 1342622
Contact Role Type: Publisher
Contact Type: Organization
Contact Name: USGS
Citation URL: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_6_B22/ept.json
Citation URL Name: Entwine Point Tile for MN_CentralMissRiver_6

Process Steps

Process Step 1

CC ID: 1342587
Description:

Lidar Point Cloud Classification: 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 Processed, but Unclassified (Class 1), Bare Earth Ground (Class 2), Low Noise (Class 7), Water (Class 9), Bridge Decks (Class 17), High Noise (Class 18), and Ignored Ground (Class 20). The bare-earth (Class 2 - Ground) lidar points underwent a manual QA/QC step to verify the quality of the DEM as well as a peer-based QC review. This included a review of the DEM surface to remove artifacts and ensure topographic quality. After the bare-earth surface is finalized, it is then used to generate all hydro-breaklines through a semi-automated process. All ground (Class 2) lidar data inside of the Lake Pond and Double Line Drain hydro flattening breaklines were then classified to water (Class 9) using TerraScan/LP360 macro functionality. A buffer of 0.7 meters was also used around each hydro-flattened feature to classify these ground (Class 2) points to Ignored Ground (Class 20). All Lake Pond Island and Double Line Drain Island features were checked to ensure that the ground (Class 2) points were reclassified to the correct classification after the automated classification was completed. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Global Mapper was used as a final check of the bare earth dataset. GeoCue was then used to create the deliverable industry-standard LAS files. Woolpert proprietary software and LP360 was used to perform final statistical analysis of the classes in the LAS files, on a per tile level to verify final classification metrics and full LAS header information.

Process Date/Time: 2023-02-22 00:00:00

Process Step 2

CC ID: 1342623
Description:

Original point clouds in LAS/LAZ format were restructured as Entwine Point Tiles and stored on Amazon Web Services. The data were re-projected horizontally to WGS84 web mercator (EPSG 3857) and and the vertical units of meters (NAVD88 GEOID18) were retained.

Process Contact: U.S. Geological Survey

Process Step 3

CC ID: 1342624
Description:

The NOAA Office for Coastal Management (OCM) created references to the Entwine Point Tiles (EPT) that were ingested into the NOAA Digital Coast Data Access Viewer (DAV). No changes were made to the data. The DAV will access the point cloud as it resides on Amazon Web Services (AWS) under the usgs-lidar-public container.

These are the AWS URLs being accessed:

https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_1_B22/ept.json

https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_2_B22/ept.json

https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_3_B22/ept.json

https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_4_B22/ept.json

https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_5_B22/ept.json

https://s3-us-west-2.amazonaws.com/usgs-lidar-public/MN_CentralMissRiver_6_B22/ept.json

Process Date/Time: 2024-07-23 00:00:00
Process Contact: Office for Coastal Management (OCM)

Catalog Details

Catalog Item ID: 73145
GUID: gov.noaa.nmfs.inport:73145
Metadata Record Created By: Rebecca Mataosky
Metadata Record Created: 2024-07-23 13:44+0000
Metadata Record Last Modified By: Rebecca Mataosky
Metadata Record Last Modified: 2024-07-23 18:28+0000
Metadata Record Published: 2024-07-23
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2024-07-23
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2025-07-23