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Short Citation:
OCM Partners, 2024: 2001 USACE Bathymetric LiDAR: Hawaiian Islands,

Item Identification

Title: 2001 USACE Bathymetric LiDAR: Hawaiian Islands
Short Name: hi2001_usace_hawaii_m1465_metadata
Status: Completed
Publication Date: 2013-03

These data were collected by the SHOALS (Scanning Hydrographic Operational Airborne Lidar Survey) system which consists of an airborne laser transmitter/receiver

capable of measuring 400 soundings per second. The system operates from a deHavilland DHC-6 Twin Otter flying at altitudes between 200 and 400 meters with a

ground speed of about 100 knots. The SHOALS system also includes a ground-based data processing system for calculating acurate horizontal position and water depth.

Lidar is an acronym for LIght Detection And Ranging. The system operates by emitting a pulse of light that travels from an airborne platform to the water surface where a small

portion of the laser energy is backscattered to the airborne receiver. The remaining energy at the water's surface propogates through the water column and reflects off the

sea bottom and back to the airborne detector. The time difference between the surface return and the bottom return corresponds to water depth. The maximum depth

the system is able to sense is related to the complex interaction of radiance of bottom material, incident sun angle and intensity, and the type and quantity of organics

or sediments in the water column. As a rule-of-thumb, the SHOALS system should be capable of sensing bottom to depths equal to two or three times the Secchi depth.

Original contact information:

Contact Org: U.S. Army Corps of Engineers JALBCTX

Phone: 334-690-3467


The purpose of the survey was to collect and map data from the shoreline to -30m depths.



Supplemental Information:

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


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
None Hydrographic Survey

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 LAS 1.2 format

Entity Attribute Detail Citation:


Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility

of JALBCTX, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 674979
Date Effective From: 2013-03
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


CC ID: 674981
Date Effective From: 2013-03
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Metadata Contact

CC ID: 674982
Date Effective From: 2013-03
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Point of Contact

CC ID: 674980
Date Effective From: 2013-03
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1133564
W° Bound: -158.229125
E° Bound: -157.665019
N° Bound: 21.466598
S° Bound: 21.238352

Extent Group 1 / Time Frame 1

CC ID: 1133563
Time Frame Type: Discrete
Start: 2000-12

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:


Data Access Constraints:


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: 741074
Download URL:
File Name: Customized Download

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

Distribution 2

CC ID: 741075
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 741077
URL Type:
Online Resource


CC ID: 741078
URL Type:
Online Resource


CC ID: 741079
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz

This graphic shows the lidar coverage for coastal regions of Oahu, Hawaii.

Activity Log

Activity Log 1

CC ID: 674996
Activity Date/Time: 2016-05-23

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 674995
Activity Date/Time: 2017-11-14

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

Activity Log 3

CC ID: 718301
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741076
Activity Date/Time: 2018-03-13

Partial upload to move data access links to Distribution Info.

Data Quality


SHOALS has demonstrated capabilities that meet US Army Corps of Engineers Hydrographic Survey accuracy requirements for Class 1 surveys and the International

Hydrographic Organization nautical charting standards for Order 1.

Horizontal Positional Accuracy:

+/- 3 meters (1 sigma); Quantitative Value: 3.0 meters, Test that produced the value: Not tested, compiled to meet value (meters) at 1 sigma (1 standard deviation).

Vertical Positional Accuracy:

+/- 15 cm (1 sigma); Quantitative Value: 0.15 meters, Test that produced the value: Collected to meet value (meters) at 1 sigma (1 standard deviation)

Completeness Report:


Conceptual Consistency:



Process Steps

Process Step 1

CC ID: 1133560

The SHOALS airborne system acquires a tremendous volume of raw data during a single mission. The lidar dataare unique and require a specialized Data Processing

System (DPS) for post-processing. The DPS main funcions 1) import airborne data stored on high density data tape; 2) perform quality control checks on initial

depths and horizontal positions; 3) provide display and edit capabilities; 4) calculate depth and position (XYZ) values for each sounding; and 5) output final positions

and depths for each sounding.

Process Date/Time: 2000-12-01 00:00:00

Process Step 2

CC ID: 1133561

The NOAA Office for Coastal Management (OCM) received topographic files in ASCII format. The files contained

bathymetric depth measurements. Some sections of the data were received in NAD27 Hawaii State Plane (various zones), other sections

were received in NAD27 UTM Zones 4 and 5. The data were vertically referenced to MLLW (feet or meters). OCM performed the following processing for

data storage and Digital Coast provisioning purposes:

1. The topographic las files were converted from Projected coordinates (State Plane or UTM) to Geographic coordinates.

2. If the vertical units were feet they were converted to meters.

3. The data were converted from ASCII to LAS V1.2

4. All points were classified to Class 11 (Bathymetry).

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

Catalog Details

Catalog Item ID: 49741
GUID: gov.noaa.nmfs.inport:49741
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:21+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