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Summary

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Short Citation
OCM Partners, 2024: 2015 NRCS-MDEQ Lidar: Southeast Mississippi QL2, https://www.fisheries.noaa.gov/inport/item/49827.
Full Citation Examples

Abstract

This report contains a comprehensive outline of the Mississippi QL2 and Tupelo QL3 Lidar Processing task order for the United States Geological Survey (USGS). This task is issued under USGS Contract No. G10PC00057, Task Order No. G14PD01046. This task order requires lidar data to be acquired over approximately 4385 square miles. The lidar was collected and processed to meet a maximum Nominal Post Spacing (NPS) of 0.7 meter. The NPS assessment is made against single swath, first return data located within the geometrically usable center portion (typically ~90%) of each swath.

Distribution Information

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

  • Simple download of data files.

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be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.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. These data depict the heights at the time of the survey and are only accurate for that time.

Controlled Theme Keywords

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

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

Extents

Geographic Area 1

-90.326075° W, -88.425228° E, 31.894581° N, 30.997494° S

Time Frame 1
2015-01-31 - 2015-03-03

Item Identification

Title: 2015 NRCS-MDEQ Lidar: Southeast Mississippi QL2
Short Name: ms2015_nrcs_mdeq_southeast_m4907_metadata
Status: Completed
Publication Date: 2016-10-17
Abstract:

This report contains a comprehensive outline of the Mississippi QL2 and Tupelo QL3 Lidar Processing task order for the United States Geological Survey (USGS). This task is issued under USGS Contract No. G10PC00057, Task Order No. G14PD01046. This task order requires lidar data to be acquired over approximately 4385 square miles. The lidar was collected and processed to meet a maximum Nominal Post Spacing (NPS) of 0.7 meter. The NPS assessment is made against single swath, first return data located within the geometrically usable center portion (typically ~90%) of each swath.

Purpose:

This task order also requests the processing of previously collected QL3 data near Tupelo, Mississippi. The lidar was collected and processed to meet a maximum Nominal Post Spacing (NPS) of 1.0 meter. The NPS assessment is made against single swath, first return data located within the geometrically usable center portion (typically ~90%) of each swath.

Notes:

10471

Supplemental Information:

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4907/supplemental/ms2015_nrcs_mdeq_southeast_m4907.kmz

Lidar report for this data set is available here:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4907/supplemental/ms2015_nrcs_mdeq_southeast_m4907_lidarreport.pdf

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation

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:

Lidar points in LAZ format (Classes 1,2,7,9,10,17,18)

Entity Attribute Detail Citation:

none

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of USDA-NRCS, MDEQ, Wooolpert, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 679062
Date Effective From: 2016-10-17
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: 679064
Date Effective From: 2016-10-17
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: 679065
Date Effective From: 2016-10-17
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: 679063
Date Effective From: 2016-10-17
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: 1137067
W° Bound: -90.326075
E° Bound: -88.425228
N° Bound: 31.894581
S° Bound: 30.997494

Extent Group 1 / Time Frame 1

CC ID: 1137066
Time Frame Type: Range
Start: 2015-01-31
End: 2015-03-03

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=4907;

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. These data depict the heights at the time of the survey and are only accurate for that time.

Distribution Information

Distribution 1

CC ID: 741568
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=4907
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: 741569
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4907/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741571
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741572
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 741573
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/4907/supplemental/ms2015_nrcs_mdeq_southeast_m4907.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the coverage of the 2015 lidar QL2 project in the Southeast of Mississippi.

Activity Log

Activity Log 1

CC ID: 679098
Activity Date/Time: 2016-12-01
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 679097
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: 718399
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741570
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

None reported; Quantitative Value: 100 meters, Test that produced the value: Explicity horizontal accuracy is not reported in the accuracy report provided. Assumptions of 1 meter.

Vertical Positional Accuracy:

The vertical accuracy statistics were calculated by comparison of the lidar bare earth points to the ground surveyed QA/QC points. Mississippi QL2 Lidar was processed and delivered in NAD1983(2011) UTM16, NAVD88 Geoid12A meters. Data deliverables were reprojected and also delivered in NAD1983(2011) UTM15, NAVD88 Geoid12A meters. It should be noted that accuracy analysis was reported for the UTM16 data.; Quantitative Value: 0.150 meters, Test that produced the value: LAS Swath Fundamental Vertical Accuracy (FVA) Tested 0.150 meters fundamental vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using (RMSEz) x 1.96000 Tested against the TIN using independent check points.; Quantitative Value: 0.162 meters, Test that produced the value: Bare-Earth DEM Fundamental Vertical Accuracy (FVA) Tested 0.162 meters fundamental vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using (RMSEz) x 1.96000 Tested against the DEM using independent check points.; Quantitative Value: 0.232 meters, Test that produced the value: Bare Earth/Open Terrain Land Cover Classification Supplemental Vertical Accuracy (SVA) Tested 0.232 meters supplemental vertical accuracy at the 95th percentile in Bare Earth/Open Terrain. Tested against the DEM.; Quantitative Value: 0.114 meters, Test that produced the value: Urban Land Cover Classification Supplemental Vertical Accuracy (SVA) Tested 0.114 meters supplemental vertical accuracy at the 95th percentile in Urban. Tested against the DEM. ; Quantitative Value: 0.238 meters, Test that produced the value: Tall Weeds/Crops Land Cover Classification Supplemental Vertical Accuracy (SVA) Tested 0.238 meters supplemental vertical accuracy at the 95th percentile in Tall Weeds/Crops. Tested against the DEM. ; Quantitative Value: 0.249 meters, Test that produced the value: Brush Lands and Trees Land Cover Classification Supplemental Vertical Accuracy (SVA) Tested 0.249 meters supplemental vertical accuracy at the 95th percentile in Brush Lands and Trees. Tested against the DEM.; Quantitative Value: 0.237 meters, Test that produced the value: Forested and Fully Grown Land Cover Classification Supplemental Vertical Accuracy (SVA) Tested 0.237 meters supplemental vertical accuracy at the 95th percentile in Forested and Fully Grown. Tested against the DEM.; Quantitative Value: 0.232 meters, Test that produced the value: Consolidated Vertical Accuracy (CVA) Tested 0.232 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.

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: 1137059
Description:

USGS Contract No. G10PC00057. Task Order No. G12PD000125. Woolpert Order No. 073054

Process Step 2

CC ID: 1137060
Description:

USGS Contract No. G10PC00057, Task Order No. G14PD01046

Process Date/Time: 2015-01-31 00:00:00

Process Step 3

CC ID: 1137061
Description:

The 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 Date/Time: 2012-01-01 00:00:00

Process Step 4

CC ID: 1137062
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: 2015-02-03 00:00:00

Process Step 5

CC ID: 1137063
Description:

When the sensor calibration, data acquisition, and GPS processing phases were complete, the formal data reduction processes by Woolpert lidar specialists included:

- Processed individual flight lines to derive a raw "Point Cloud" LAS file. Matched overlapping flight lines, generated statistics for evaluation comparisons, and made the necessary adjustments to remove any residual systematic error.

- Calibrated LAS files were imported into the task order tiles and initially filtered to create a ground and non-ground class. Then additional classes were filtered as necessary to meet client specified classes.

- Once all project data was imported and classified, survey ground control data was imported and calculated for an accuracy assessment. As a QC measure, Woolpert has developed a routine to generate accuracy statistical reports by comparisons against the TIN and the DEM using surveyed ground control of higher accuracy. The lidar is adjusted accordingly to meet or exceed the vertical accuracy requirements.

- The lidar tiles were reviewed using a series of proprietary QA/QC procedures to ensure it fulfills the task order requirements. A portion of this requires a manual step to ensure anomalies have been removed from the ground class.

- The lidar LAS files are classified into the Default (Class 1), Ground (Class 2), Low Noise (Class 7), Water (Class 9), Ignored Ground (Class 10), Overlap Default (Class 17) and Overlap Ground (Class 18) classifications.

- FGDC Compliant metadata was developed for the task order in .xml format for the final data products.

- The horizontal datum used for the task order was referenced to UTM16N North American Datum of 1983 (2011) and UTM15N North American Datum of 1983 (2011). The vertical datum used for the task order was referenced to NAVD 1988, meters, GEOID12A. Coordinate positions were specified in units of meters.

Process Date/Time: 2015-12-01 00:00:00

Process Step 6

CC ID: 1137064
Description:

The NOAA Office for Coastal Management (coast) received the LAS files in from MARIS (Mississippi Automated Resource Information System) via an FTP site. The data was received in UTM zones 15 and 16 horizontal coordinates in meters with vertical coordinates referenced to NAVD88 in meters. The Digital Coast performed the following processing for data storage and Digital Coast provisioning purposes:

1. The LAS files had all overlap and duplicate tiles removed. This was due to the separation of tiles into counties which created a number of duplicate tiles altogether then converted to LAZ format.

2. UTM 15 LAZ tiles were transformed to UTM 16 coordinates in order to remove overlap between the UTM zones.

3. The vertical coordinates were reprojected to ellipsoidal heights using Geoid12a and horizontal coordinates were reprojected to geographic decimal degrees.

Process Date/Time: 2016-09-20 00:00:00

Catalog Details

Catalog Item ID: 49827
GUID: gov.noaa.nmfs.inport:49827
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