Pohue Bay, HI
Table of Contents
Identification_Information:
Citation:
Citation_Information:
Originator: US Army Engineer Joint Airborne Lidar Bathymetry Technical Center of Expertise.(ed.)
Publication_Date: 20010800
Publication_Time: Unknown
Title: Pohue Bay, HI
Edition: 1.1
Description:
Abstract:
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.
Purpose:
The purpose of the Pohue Bay survey was to collect
and map data from the shoreline to -30m depths.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20001200
Currentness_Reference: Ground Condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Unknown
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -155.668333
East_Bounding_Coordinate: -155.561111
North_Bounding_Coordinate: +20.181389
South_Bounding_Coordinate: +20.145833
Access_Constraints: None
Use_Constraints:
Acknowledgement of the U.S. Army Engineer Joint
Airborne Lidar Bathymetry Technical Center of Expertise
(JALBCTX) would be appreciated in products derived from
these data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Army Corps of Engineers JALBCTX
Contact_Address:
Address_Type: mailing and physical address
Address: 109 St. Joseph Street
City: Mobile
State_or_Province: Alabama
Postal_Code: 36602
Contact_Voice_Telephone: 334-690-3467
Contact_Facsimile_Telephone: 334-690-3464
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
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.
Logical_Consistency_Report: N/A
Completeness_Report: N/A
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: +/- 3 meters (1 sigma)
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: +/- 15 cm (1 sigma)
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Army Corps of Engineers JALBTCX
Publication_Date: 20010800
Title: Pohue Bay, HI
Edition: 1.1
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20001200
Source_Currentness_Reference: Ground Condition
Source_Citation_Abbreviation: None
Source_Contribution: SHOALS
Process_Step:
Process_Description:
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: 20001200
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: Pohue Bay, Hawaii County, Hawaii
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 5
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: .9996
Longitude_of_Central_Meridian: -153.000000
Latitude_of_Projection_Origin: +00.000000
False_Easting: 500000
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 8
Ordinate_Resolution: 8
Planar_Distance_Units: Meters
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Mean lower low water
Depth_Resolution: 0.1
Depth_Distance_Units: Meters
Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Terry Hayes
Contact_Organization: USACE, HONOLULU DISTRICT
Contact_Address:
Address_Type: mailing and physical address
Address:
CEPOH-PP-C
Building 230
City: Fort Shafter
State_or_Province: HI
Postal_Code: 96858-5440
Contact_Voice_Telephone: 808.438.2250
Distribution_Liability: None
Metadata_Reference_Information:
Metadata_Date: 20010500
Metadata_Review_Date: 20020500
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Terry Hayes
Contact_Organization: USACE, HONOLULU DISTRICT
Contact_Address:
Address_Type: mailing and physical address
Address:
CEPOH-PP-C
Building 230
City: Fort Shafter
State_or_Province: HI
Postal_Code: 96858-5440
Contact_Voice_Telephone: 808.438.2250
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: June 8, 1994
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