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Short Citation:
Office for Coastal Management, 2024: 2018-2020 HI Hawaii Island Lidar Hydro-Flattened Bare-Earth DEM, https://www.fisheries.noaa.gov/inport/item/68087.

Item Identification

Title: 2018-2020 HI Hawaii Island Lidar Hydro-Flattened Bare-Earth DEM
Short Name: 2018 HI Big Island DEM m9636
Status: Completed
Publication Date: 2020-12-29
Abstract:

Product: 1-meter bare-earth raster digital elevation model (DEM) data tiles in GeoTIFF format.

Geographic Extent: Approximately 4,028 square miles encompassing the Big Island of Hawaii.

Dataset Description: The HI Hawaii Island Lidar NOAA 2017 B17 lidar project called for the planning, acquisition, processing, and production of derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.35 meters. Project specifications were based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification 2020 Revision A. The data was developed based on a horizontal datum/projection of NAD83 (PA11) UTM Zone 5N Meters (EPSG 6635) and a vertical datum of NAVD88 (GEOID1B) Meters. DEM data was delivered as Geo files formatted to 8,629 individual 1,000-meter x 1,000-meter tiles.

Ground Conditions: Lidar was collected from January 30, 2018 through January 6, 2020 by Leica Geosystems, Inc. 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 70 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 0 independent accuracy checkpoints (0 NVA points and 0 VVA points), were collected and used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.

Areas near cliffs with dense vegetation may have poor interpolations over voids. Please see the data use constraints section.

Purpose:

This data is intended for use in coastal management decision making, including applications such as support for local hydrologists and watershed managers in their decision-making processes and for formulating a sediment budget and identifying soil erosion hotspots.

Supplemental Information:

USGS Contract No. G16PC00022, NOAA Contract No. EA133C33CQ0010. USGS Task Order No. G17PD01353. NOAA Task Order No. T-0040. CONTRACTOR: Woolpert. Sub-contractor: Leica Geosystems, Inc.

Raster File Type = TIFF

Bit Depth/Pixel Type = 32-bit float

Raster Cell Size = 1 Meter

Interpolation or Resampling Technique = Triangulated Irregular Network

Required Vertical Accuracy = 19.6 cm NVA

This work was funded by: NOAA Office for Coastal Management, FEMA Region 9, FEMA HQ, USDA NRCS, County of Hawaii, USGS HVO, and USGS 3DEP

Keywords

Theme Keywords

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

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
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: Raster digital data
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: NOAA, USGS, Woolpert

Support Roles

Data Steward

CC ID: 1188101
Date Effective From: 2022
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: 1188100
Date Effective From: 2022
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: 1188102
Date Effective From: 2022
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: 1188103
Date Effective From: 2022
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: 1298768
W° Bound: -156.073778
E° Bound: -155.057848
N° Bound: 20.280495
S° Bound: 18.903687

Extent Group 1 / Time Frame 1

CC ID: 1298767
Time Frame Type: Range
Start: 2018-01-30
End: 2020-01-06

Access Information

Security Class: Unclassified
Data Access Procedure:

Data is available online for bulk or 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.

The point cloud used to derive this dataset is known to have areas where the dense vegetation prevented reliable ground classification of the points. In such areas near cliffs, interpolation over the void areas for this DEM may have resulted in a very poor representation of the cliff area. Attempts have been made to remediate that issue in at least one area, but there are likely to be more areas. Care should be taken to examine the voids in the original point cloud when analyzing cliff areas in this dataset.

Distribution Information

Distribution 1

CC ID: 1188107
Start Date: 2022-10-25
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9636/details/9636
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2022 - Present)
File Name: Customized Download
Description:

Create custom data files by choosing data area, map projection, file format, etc. A new metadata will be produced to reflect your request using this record as a base.

File Type (Deprecated): Zip
Compression: Zip

Distribution 2

CC ID: 1188108
Start Date: 2022-10-25
End Date: Present
Download URL: https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/HI_Big_Island_DEM_2018_9636/index.html
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2022 - Present)
File Name: Bulk Download
Description:

Bulk download of data files in the original coordinate system.

URLs

URL 1

CC ID: 1188095
URL: https://coast.noaa.gov/
Name: NOAA's Office for Coastal Management (OCM) website
URL Type:
Online Resource
File Resource Format: HTML
Description:

Information on the NOAA Office for Coastal Management (OCM)

URL 2

CC ID: 1188096
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 3

CC ID: 1188097
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/9635/supplemental/2018-2020_bigIsland_extent_m9635.kmz
Name: Browse graphic
URL Type:
Browse Graphic
File Resource Format: KML
Description:

This graphic displays the footprint for this lidar data set.

URL 4

CC ID: 1188098
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/9635/supplemental/HI_Hawaii_Island_Lidar_NOAA_2017_B17_Lidar_Report.pdf
Name: Dataset report
URL Type:
Online Resource
File Resource Format: PDF
Description:

Link to data set report.

Technical Environment

Description:

Microsoft Windows 10 Version 1607 (Build 14393.2189); ArcMap 10.7; ArcCatalog 10.7; TerraScan ver. 20; TerraModeler ver. 20; Geocue 2018.2.59.5; GDAL 2.4.0.

Data Quality

Vertical Positional Accuracy:

NOAA collected independent checkpoints located in non-vegetated and vegetated land cover classes in order to perform independent vertical accuracy testing on the lidar point cloud swath and DEM data. Preliminary quantitative value: 0.11 meters RMSE in non-vegetated areas, 0.50 m in vegetated areas. These figures were calculated by Woolpert using the NOAA checkpoints.

USGS Determined DEM Vertical Accuracy:

Non-Vegetated Vertical Accuracy (NVA) = 20.84 cm at 95% Confidence Level or 10.63 cm RMSE

Vegetated Vertical Accuracy (VVA) =111.37 cm at the 95th Percentile

Completeness Report:

Datasets contain complete coverage of tiles. A visual qualitative assessment was performed to ensure data completeness. The DEM is of good quality and data passes Non-Vegetated and Vegetated Vertical Accuracy specifications.

Conceptual Consistency:

Data covers the entire area specified for this project.

Lineage

Sources

Data extent

CC ID: 1298758
Publish Date: 2020-12-29
Extent Type: Discrete
Extent Start Date/Time: 2020-12-29
Source Contribution:

The data extent was provided by USGS in shapefile format. The shapefile was buffered by 100-meters. It was used in acquisition planning and to clip the final deliverable data.

Hydro Breaklines

CC ID: 1298759
Publish Date: 2020-12-29
Extent Type: Discrete
Extent Start Date/Time: 2020-12-29
Source Contribution:

This dataset includes hydro breaklines collected as part of this task order.

Lidar acquisition

CC ID: 1298760
Publish Date: 2020-12-29
Extent Type: Range
Extent Start Date/Time: 2018-01-30
Extent End Date/Time: 2020-01-06
Source Contribution:

This dataset includes airborne lidar data point cloud data acquired as part of this task order. This data was used to create the required derivative lidar products.

Survey Control Acquisition

CC ID: 1298761
Publish Date: 2020-12-29
Source Contribution:

This dataset includes ground control calibration points identified by Woolpert and Leica and collected by NOAA OCM staff and QA/QC checkpoints identified and collected by Woolpert and Leica staff as part of this task order. These points were used in the calibration and accuracy testing of the lidar point cloud and DEM data.

Tile index

CC ID: 1298762
Publish Date: 2020-12-29
Extent Type: Discrete
Extent Start Date/Time: 2020-12-29
Source Contribution:

The tile index provided by USGS in shapefile format. The tiles have a size of 1,000-meters x 1,000-meters. Tile names were derived from US National Grid naming schema. This index was used to create the tiled deliverables for this project.

Process Steps

Process Step 1

CC ID: 1298763
Description:

Hydro-Flattened Digital Elevation Models (DEMs): Class 2 (ground) lidar points in conjunction with the hydro breaklines as well bridge breaklines were used to create a 1-meter hydro-flattened bare-earth raster DEM. Using automated scripting routines within ArcMap, a GeoTIFF file was created for each tile. Each surface is reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface. The single photon lidar data acquisition for this award occurred across two separate deployments. The approximate date range of the first acquisition window was from January 2018 to March 2018 and second window was from November 2019 to January 2020. Given the complexity of the terrain, the flight plan for the project included significant overlapping and off-angle lines between the 2018 and 2019/2020 collection which can create more opportunity to notice differences than is normally seen in a lidar collection where lines tend to follow a single direction and acquisition across years is cut into more complete blocks. For each acquisition season, the acquired data was processed and geometrically calibrated by Woolpert’s teaming and data acquisition partner Hexagon. During the calibration, the data was processed to meet the required accuracy specifications per each mission as well as between adjacent missions of the differing flight dates within a given acquisition season. Once the calibration was complete and the data entered full processing, Woolpert made the best efforts to populate delivery tiles containing flights from different acquisition seasons with data acquired from a single season. In these tiles preference was given to the points acquired during the 2018 season because of the significant data processing had occurred within these tiles prior to the second acquisition season. In some areas pieces of lines from the different acquisitions created the edge artifacts. Low confidence polygons were generated around these areas to make the user aware of the discrepancy.

Process Date/Time: 2020-12-29 00:00:00

Process Step 2

CC ID: 1298764
Description:

Data were reorganized into cloud optimized geotiff format and ingested into the Data Access Viewer system.

Process Date/Time: 2022-10-18 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov

Process Step 3

CC ID: 1298765
Description:

Two tiles (5QKB800850.tif and 5QKB810850.tif) were regenerated after their underlying point clouds were re-examined to find ground points near the cliffs. The TIN process was cutting off the cliffs because there were no ground points near the edge and the area was interpolated between the bottom of the cliff and points 50 to 100 meters back from the cliff. This work was done by Woolpert.

Process Date/Time: 2023-04-14 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov

Related Items

Item Type Relationship Type Title
Data Set (DS) Cross Reference 2018 - 2020 NOAA USGS Lidar: Hawaii, HI

lidar point cloud source for DEM

Catalog Details

Catalog Item ID: 68087
GUID: gov.noaa.nmfs.inport:68087
Metadata Record Created By: Kirk Waters
Metadata Record Created: 2022-10-25 15:35+0000
Metadata Record Last Modified By: Kirk Waters
Metadata Record Last Modified: 2024-01-10 19:28+0000
Metadata Record Published: 2024-01-10
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-10-25
Metadata Review Frequency: 2 Years
Metadata Next Review Date: 2024-10-25