Short Citation:
Pacific Islands Fisheries Science Center, 2021: Depth soundings from a single beam echo sounder collected around the nearshore areas of Timor-Leste in 2012 and 2013, https://www.fisheries.noaa.gov/inport/item/25307.

Item Identification

Title: Depth soundings from a single beam echo sounder collected around the nearshore areas of Timor-Leste in 2012 and 2013
Short Name: Timor: singlebeam
Status: Completed
Publication Date: 2017
Abstract:

This dataset contains singlebeam bathymetry data acquired during small-boat surveys conducted from October 20-26, 2012 and June 4-27, 2013 in Timor-Leste by the NOAA Coral Reef Ecosystem Program (CREP). Data was acquired with a HydroLite-TM Echosounder Kit by Seafloor Systems, a small boat Hydro Survey System using Ohmex SonarMite echosounder and Trimble ProXT receiver. The singlebeam bathymetry was used to ground-truth bathymetry derived from WorldView-2 satellite imagery by CREP for the near-shore areas (0-20 m depths) around Timor-Leste.

Purpose:

In 2011, NOAA and the United States Agency for International Development (USAID) Timor-Leste Mission formed a 5-year bi-lateral partnership agreement from 2012 to 2016, in support of the Government of Timor-Leste—particularly the Ministry of Agriculture and Fisheries (MAF)—by addressing significant information gaps in their nearshore marine ecosystems. Specifically, MAF asked NOAA to address the following questions:

1. Where are the nearshore marine resources?

2. What are the nearshore marine resources?

3. How are they changing over time and what threats are potentially causing these changes?

4. What approaches are needed to manage and conserve the nearshore marine resources?

With financial support from USAID and in-kind support from the NOAA Coral Reef Conservation Program (CRCP), the NOAA Coral Reef Ecosystem Program (NOAA-CREP) conducted baseline ecosystem assessment surveys to inform ecosystem-based management planning in Timor-Leste. The primary activities conducted by NOAA to answer these questions included:

1. satellite mapping of nearshore habitats,

2. conducting coral reef ecosystem assessments,

3. establishing ecological baselines for climate change, and

4. building management capacity by developing a spatial data framework

The singlebeam bathymetry data described herein resulted from the first activity to conduct satellite mapping for the nearshore waters around Timor-Leste.

Other Citation Details:

Pacific Islands Fisheries Science Center. 2017. Interdisciplinary baseline ecosystem assessment surveys to inform ecosystem-based management planning in Timor-Leste: Final Report. Pacific Islands Fisheries Science Center, PIFSC Special Publication, SP-17-002, 234 p. https://doi.org/10.7289/V5/SP-PIFSC-17-002.

Supplemental Information:

Mission ID, 2012: SBP1215

Mission ID, 2013: SBP1310

Surveys were conducted from local Timorese boat charters:

2012/2013: Lancet, 27’ Boston Whaler for shore-based surveys

2012: Cattitude, 40’ live-aboard catamaran

2013: Sundancer NT, 50’ live-aboard catamaran

Keywords

Theme Keywords

Thesaurus Keyword
CoRIS Discovery Thesaurus Geographic Information > Bathymetry
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Aquatic Habitat > Reef Habitat
CoRIS Theme Thesaurus EARTH SCIENCE > Biosphere > Zoology > Corals > Reef Monitoring and Assessment > Mapping
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
CoRIS Theme Thesaurus EARTH SCIENCE > Oceans > Coastal Processes > Coral Reefs
ISO 19115 Topic Category 006
ISO 19115 Topic Category elevation
NODC DATA TYPES THESAURUS BATHYMETRY
NODC DATA TYPES THESAURUS water depth
NODC OBSERVATION TYPES THESAURUS in situ
NODC PROJECT NAMES THESAURUS CORAL REEF STUDIES
NODC PROJECT NAMES THESAURUS Coral Triangle Initiative
NODC SUBMITTING INSTITUTION NAMES THESAURUS US DOC; NOAA; NMFS; Pacific Islands Fisheries Science Center; Ecosystem Sciences Division; Coral Reef Ecosystem Program
None Coral Reef Ecosystem Division
None Coral Reef Ecosystem Program
None CRED
None CREP
None Pacific Islands Fisheries Science Center
None PIFSC
None seafloor elevation
None single beam
None Singlebeam
None United States Agency for International Development
None USAID

Spatial Keywords

Thesaurus Keyword
CoRIS Place Thesaurus COUNTRY/TERRITORY > Democratic Republic of Timor-Leste (East Timor) (09S126E0001)
CoRIS Place Thesaurus OCEAN BASIN > Indian Ocean > Timor Sea > Democratic Republic of Timor-Leste (East Timor) (09S126E0001)
NODC SEA AREA NAMES THESAURUS Indian Ocean
NODC SEA AREA NAMES THESAURUS Timor Sea
None Atauro
None Baucau
None Bobonaro
None Dili
None Jaco
None Lautem
None Liquica
None Manatuto
None Oecusse
None Timor
None Timor-Leste
None Vila MPA

Stratum Keywords

Thesaurus Keyword
Global Change Master Directory SEA FLOOR

Physical Location

Organization: Pacific Islands Fisheries Science Center
City: Honolulu
State/Province: HI
Country: USA

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: CSV Files
Maintenance Frequency: None Planned
Data Presentation Form: Table (digital)
Entity Attribute Overview:

The singlebeam bathymetry includes the date and time the data were collected, the location, and the depths. The 2012 data includes GPS information (fix, satellitles, HDOP), and the 2013 data includes the record type (depth only [D], or depth linked to GPS [L]) and the return signal strength (the higher the number the better).

Entity Attribute Detail URL: https://www.fisheries.noaa.gov/inport/item/50856
Distribution Liability:

While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Data Set Credit: PIFSC Coral Reef Ecosystem Program and funded by the United States Agency for International Development

Support Roles

Data Steward

CC ID: 705662
Date Effective From: 2012
Date Effective To:
Contact (Person): Gray, Andrew
Email Address: andrew.gray@noaa.gov
Contact Instructions:

email preferred

Distributor

CC ID: 705663
Date Effective From: 2017
Date Effective To:
Contact (Organization): National Centers For Environmental Information (Boulder) (NCEI-Boulder)
Address: E/GC 325 Broadway
Boulder, CO 80305-3328
Phone: 303-497-6826
URL: https://www.ngdc.noaa.gov/

Distributor

CC ID: 705664
Date Effective From: 2012
Date Effective To: 2017
Contact (Person): DesRochers, Annette M
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: annette.desrochers@noaa.gov
Phone: (808)725-5461
Business Hours: 8 am - 5 pm
Contact Instructions:

email preferred

Metadata Contact

CC ID: 705665
Date Effective From: 2012
Date Effective To:
Contact (Person): DesRochers, Annette M
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: annette.desrochers@noaa.gov
Phone: (808)725-5461
Business Hours: 8 am - 5 pm
Contact Instructions:

email preferred

Originator

CC ID: 705666
Date Effective From: 2012
Date Effective To:
Contact (Organization): Pacific Islands Fisheries Science Center (PIFSC)
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Phone: 808-725-5300
URL: http://www.pifsc.noaa.gov
Business Hours: 8:00 a.m. - 4:30 p.m.

Point of Contact

CC ID: 705667
Date Effective From: 2012
Date Effective To:
Contact (Person): DesRochers, Annette M
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: annette.desrochers@noaa.gov
Phone: (808)725-5461
Business Hours: 8 am - 5 pm
Contact Instructions:

email preferred

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Description:

Timor-Leste

Extent Group 1 / Geographic Area 1

CC ID: 705669
W° Bound: 124
E° Bound: 127.4
N° Bound: -8.1
S° Bound: -9.4
Description

Extent of surveys conducted by NOAA CREP in Timor-Leste in 2012 and 2013.

Extent Group 1 / Time Frame 1

CC ID: 705670
Time Frame Type: Range
Start: 2013-06-04
End: 2013-06-27
Alternate Start As Of Info: SB1310
Description:

Time frame of surveys conducted by NOAA CREP in Timor-Leste in 2013.

Extent Group 1 / Time Frame 2

CC ID: 705671
Time Frame Type: Range
Start: 2012-10-20
End: 2012-10-26
Alternate Start As Of Info: SBP-12-15
Description:

Time frame of surveys conducted by NOAA CREP in Timor-Leste in 2012.

Access Information

Security Class: Unclassified
Security Classification System:

Not applicable

Security Handling Description:

Not applicable

Data Access Policy:

NOAA Coral Reef Ecosystem Program (CREP) Data Sharing Recommendations, version 9.0 updated August 12, 2015:

CREP welcomes the opportunity to collaborate on research issues contributing to the scientific basis for better management of marine ecosystems. CREP has a very diverse set of field activities that generates large volumes of data using an array of data collection protocols.

The following recommendations are for your consideration as you use this data:

1) Data analyses should take all field exigencies into account. The most effective way to do this would be active collaboration with CREP principal investigators.

2) In all presentations, product releases, or publications using data generated by CREP, proper acknowledgement of both CREP and the individuals responsible for data collection is expected. Citing the DOI (if available) is preferred, a non-DOI example is listed below.

3) If you collect or generate data for the same study areas, CREP requests that you share relevant information on complimentary data collections.

4) Those receiving data are strongly urged to inform the CREP Data Management Team of any errors and discrepancies that are discovered during the course of using these data. They are further urged to bring to the attention of the Team all problems and difficulties encountered in using these data. This information is necessary in order to improve the collections and to facilitate more efficient and economical data processing and retrieval. The users are asked to supply copies of any missing data that may be located, and to provide information as to significant subsets and special aggregations of data that are developed in using the material provided.

Example citation:

"This publication makes use of data products provided by the Coral Reef Ecosystem Program (CREP), Pacific Islands Fisheries Science Center (PIFSC), National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), with funding support from the United States Agency for International Development (USAID). The analysis and interpretations presented here are solely that of the current authors.”

Data Access Procedure:

Data can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Ocean Archive

Data Access Constraints:

None

Data Use Constraints:

Please cite NOAA Coral Reef Ecosystem Program (CREP) when using the data.

Example

Coral Reef Ecosystem Program; Pacific Islands Fisheries Science Center (2017). Singlebeam bathymetry for Timor-Leste (2012 and 2013). NOAA's National Centers for Environmental Information. Dataset. https://www.fisheries.noaa.gov/inport/item/25307

Metadata Access Constraints:

None

Metadata Use Constraints:

None

Distribution Information

Distribution 1

CC ID: 268361
Start Date: 2018-04-09
End Date: Present
Download URL: https://maps.ngdc.noaa.gov/viewers/geophysics/
Distributor: National Centers For Environmental Information (Boulder) (NCEI-Boulder) (2017 - Present)
Description:

Depth soundings collected during small-boat surveys around the nearshore areas of Timor-leste by the NOAA Coral Reef Ecosystem Program in Oct 2012 and June 2013. Archived with the NCEI Trackline Geophysical Data portal (search by survey/mission id SBP1215 or SBP1310).

URLs

URL 1

CC ID: 705601
URL: https://www.coris.noaa.gov/activities/projects/timor-leste/
URL Type:
Online Resource
Description:

Timor-Leste project portal on the NOAA Coral Reef Information Service website where NOAA's final report for Timor-Leste and the datasets generated by NOAA CREP as part of the project can be downloaded.

URL 2

CC ID: 705602
URL: https://www.coris.noaa.gov/activities/projects/timor-leste/images/ground_truth_s.jpg
URL Type:
Browse Graphic
Description:

Map of the singlebeam bathymetry data collected around Timor-Leste by the NOAA Coral Reef Ecosystem Program.

URL 3

CC ID: 705603
URL: https://www.pifsc.noaa.gov/cred/coral_triangle_initiative.php
URL Type:
Online Resource
Description:

Information about the NOAA Coral Reef Ecosystem Program's activities in the Coral Triangle.

Technical Environment

Description:

Singlebeam bathymetry data collected using HydroLite-TM Sonarmite Echosounder Kit by Seafloor Systems, which includes:

1) SonarMite BT-TM system, portable bluetooth echo sounder

2) SonarMite Transducer w/mount

3) Trimble Pro6T GNSS Receiver

4) Recon/GPS controller

5) Survey pole w/transom mount

Echosounder specs:

Frequency: 200 KHz

Beam width: 4 degree

Ping rate: 6-Hz

Depth accuracy: 1 cm /0.1% of depth,

Output: NMEA, ASCII, Quality

Depth range: 0.3-75 m

Data from the 2012 surveys was processed in May 2013 by Julia Ehses using version 7 of the processing script. 2012 data log files saved on PIFSC network at \\PICMAKAI\General\Cruise\CruiseData\CTI_TIM_SBP1215\Trimble_Data_Logger_Downloads\

Data from the 2013 surveys was processed in December 2017 by Annette DesRochers using SonarVista - SonarMite Edit software (v6.12) from Seafloor Systems. 2013 source data files saved on PIFSC network at \\PICMAKAI\General\Cruise\CruiseData\CTI_TIM_SBP1310\Mapping\Hydrolite_Ecosounder\data_output\Timor_Leste\

Timor-Leste project on PIFSC network: \\picGoldFish\General\ProjectGroup\Coral Triangle\Timor Leste\Spatial_Data_Framework\

Data Quality

Accuracy:

Depth: The HydroLite-TM Echosounder Kit, Sonarmite Echosounder has a depth accuracy of 1 cm / 0.1% of depth.

2012: The fix type, number of satellites, and HDOP are provided in the dataset. HDOP is a measure of the geometric quality of a GPS satellite configuration in the sky. HDOP is a factor in determining the relative accuracy of a horizontal position. The smaller the DOP number, the better the geometry.

2013: The type and QA is provided in the dataset. Records with a type = L indicate the depth record includes the GPS location and has a QA = 1 (NMEA tag for GPS fix). There are two 'type = D' records for every 'type = L' record (D=Depth), because the sonar pings every half second, which is more frequent than the GPS. For the 'type=D' records, the higher the QA, the better the return signal strength. QA=70 is low signal strength (not as good), QA = 130 is high return signal strength (better).

Quantitation Limits:

The HydroLite-TM Echosounder Kit, Sonarmite Echosounder has a depth range of 0.3 m – 75 m.

Completeness Report:

Obviously erroneous data based on the coordinates were cleaned from the dataset (coordinates outside the expected range for Timor-Leste; 0,0 pairs, etc).

Conceptual Consistency:

As the survey was not conducted to meet IHO standards, all users should independently analyze the dataset according to their own needs and standards to determine data usability.

Quality Control Procedures Employed:

All components of the HydroLite-TM Echosounder Kit was tested and calibrated in advance of surveys. The singlebeam bathymetry data were lightly processed and cleaned post-mission (obviously erroneous points based on spatial coordinates were removed).

In 2013, instrument to water surface offsets were applied (20 or 30 cm), and a sound velocity calibration factor was applied (1590 m/s, instead of the default 1500 m/s).

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
Is Access to the Data Limited Based on an Approved Waiver?: No
Approximate Delay Between Data Collection and Dissemination: Unknown
Actual or Planned Long-Term Data Archive Location: NCEI-CO
Approximate Delay Between Data Collection and Archiving: Unknown
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

NOAA IRC and NOAA Fisheries ITS resources and assets.

Lineage

Lineage Statement:

Singlebeam bathymetry data collected using HydroLite-TM Echosounder Kit by Seafloor Systems, a small boat Hydro Survey System using Ohmex SonarMite echo sounder and Trimble ProXT receiver. Data was collected following procedures established by Seafloor Systems, and the HydroLite-TM system was tested and calibrated in advance of the surveys. Soundings were recorded in meters. Data collected in 2012 were processed using a different method from that used in 2013 as described in the process steps.

Process Steps

Process Step 2012

CC ID: 705597
Description:

GPS track data (NMEA) and depths were downloaded and processed/parsed in ArcGIS using a customized track processing script written in Python. A time offset was applied to capture local time in Timor-Leste in addition to Greenwich Mean Time (GMT). The processed/parsed data were exported to an Esri geodatabase and erroneous data were cleaned in ArcGIS. The cleaned data were exported to CSV to be archived.

Process Contact: Ehses, Julia
Phone (Voice): (808)725-5447
Email Address: julia.ehses@noaa.gov

Process Step 2013

CC ID: 705598
Description:

During 2013 surveys, the system was calibrated for sound velocity. A log was kept during the surveys, including the offset from the instrument to the water surface (20 or 30 cm, depending on the vessel) and the sound velocity calibration status. The SonarMite data (.SOM) was downloaded from the instrument and imported into SonarVista, offsets and calibration were applied, obviously erroneous data based on the coordinates were removed, and the processed data were exported to CSV format. The exported data are considered 'lightly processed' and should be further inspected and cleaned before use.

Process Contact: DesRochers, Annette M
Phone (Voice): (808)725-5461
Email Address: annette.desrochers@noaa.gov

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) Singlebeam_Timor_Entities

Catalog Details

Catalog Item ID: 25307
Metadata Record Created By: Troy T Kanemura
Metadata Record Created: 2015-06-09 16:43+0000
Metadata Record Last Modified By: Annette M DesRochers
Metadata Record Last Modified: 2020-10-06 16:06+0000
Metadata Record Published: 2018-04-27
Owner Org: PIFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2019-04-28