Depth soundings from a single beam echo sounder collected around the nearshore areas of Timor-Leste in 2012 and 2013
Data Set (DS) | Pacific Islands Fisheries Science Center (PIFSC)GUID: gov.noaa.nmfs.inport:25307 | Updated: October 3, 2024 | Published / External
Summary

Short Citation
Pacific Islands Fisheries Science Center, 2025: 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.
Full Citation Examples
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.
Distribution Information
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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).
None
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
Controlled Theme Keywords
elevation
Child Items
Type | Title |
---|---|
Entity | Singlebeam_Timor_Entities |
Contact Information
Point of Contact
Annette M DesRochers
annette.desrochers@noaa.gov
(808)725-5461
Metadata Contact
Annette M DesRochers
annette.desrochers@noaa.gov
(808)725-5461
Extents
124° W,
127.4° E,
-8.1° N,
-9.4° S
Extent of surveys conducted by NOAA CREP in Timor-Leste in 2012 and 2013.
2013-06-04 - 2013-06-27
Time frame of surveys conducted by NOAA CREP in Timor-Leste in 2013.
2012-10-20 - 2012-10-26
Time frame of surveys conducted by NOAA CREP in Timor-Leste in 2012.
Item Identification
Title: | Depth soundings from a single beam echo sounder collected around the nearshore areas of Timor-Leste in 2012 and 2013 |
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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 |
---|---|
ISO 19115 Topic Category |
elevation
|
UNCONTROLLED | |
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 |
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 |
---|---|
UNCONTROLLED | |
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 |
---|---|
UNCONTROLLED | |
Global Change Master Directory | SEA FLOOR |
Physical Location
Organization: | Pacific Islands Fisheries Science Center |
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City: | Honolulu |
State/Province: | HI |
Country: | USA |
Data Set Information
Data Set Scope Code: | Data Set |
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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
Date Effective From: | 2012 |
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Date Effective To: | |
Contact (Person): | Gray, Andrew |
Email Address: | andrew.gray@noaa.gov |
Contact Instructions: |
email preferred |
Distributor
Date Effective From: | 2017 |
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Date Effective To: | |
Contact (Organization): | NOAA National Centers for Environmental Information (NCEI) |
Email Address: | ncei.info@noaa.gov |
URL: | NCEI Contact Information |
Metadata Contact
Date Effective From: | 2012 |
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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
Date Effective From: | 2012 |
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Date Effective To: | |
Contact (Organization): | Pacific Islands Fisheries Science Center (PIFSC) |
Address: |
1845 Wasp Blvd. Honolulu, HI 96818 USA |
Email Address: | pifsc.info@noaa.gov |
Phone: | 808-725-5360 |
URL: | https://www.pifsc.noaa.gov |
Business Hours: | 8:00 a.m. - 4:30 p.m. |
Point of Contact
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 |
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Extent Group 1
Extent Description: |
Timor-Leste |
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Extent Group 1 / Geographic Area 1
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
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
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 |
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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
Start Date: | 2018-04-09 |
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End Date: | Present |
Download URL: | https://maps.ngdc.noaa.gov/viewers/geophysics/ |
Distributor: | NOAA National Centers for Environmental Information (NCEI) (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
URL: | https://www.coris.noaa.gov/activities/projects/timor-leste/ |
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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
URL: | https://www.coris.noaa.gov/activities/projects/timor-leste/images/ground_truth_s.jpg |
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URL Type: |
Browse Graphic
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Description: |
Map of the singlebeam bathymetry data collected around Timor-Leste by the NOAA Coral Reef Ecosystem Program. |
URL 3
URL: | https://www.pifsc.noaa.gov/cred/coral_triangle_initiative.php |
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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\ |
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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). |
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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 |
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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. |
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Process Steps
Process Step 2012
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. |
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Process Contact: | Ehses, Julia |
Phone (Voice): | (808)725-5447 |
Email Address: | julia.ehses@noaa.gov |
Process Step 2013
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. |
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Process Contact: | DesRochers, Annette M |
Phone (Voice): | (808)725-5461 |
Email Address: | annette.desrochers@noaa.gov |
Child Items
Rubric scores updated every 15m
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Type | Title |
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Entity | Singlebeam_Timor_Entities |
Related Items
Catalog Details
Catalog Item ID: | 25307 |
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GUID: | gov.noaa.nmfs.inport:25307 |
Metadata Record Created By: | Troy T Kanemura |
Metadata Record Created: | 2015-06-09 16:43+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2024-10-03 18:16+0000 |
Metadata Record Published: | 2018-04-27 |
Owner Org: | PIFSC |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2018-04-27 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2019-04-27 |