Data Management Plan
Pacific Islands Fisheries Science Center
Data Set (DS) | Cat ID: 29128 | Published / External
Data Management Plan
DMP Template v2.0.1 (2015-01-01)Please provide the following information, and submit to the NOAA DM Plan Repository.
Reference to Master DM Plan (if applicable)
As stated in Section IV, Requirement 1.3, DM Plans may be hierarchical. If this DM Plan inherits provisions from a higher-level DM Plan already submitted to the Repository, then this more-specific Plan only needs to provide information that differs from what was provided in the Master DM Plan.
1. General Description of Data to be Managed
Benthic habitat classes were derived for nearshore waters (< 20 m depths) around Timor-Leste from DigitalGlobe WorldView-2 satellite imagery, acquired from February 9, 2010 to December 14, 2013, by the NOAA Coral Reef Ecosystem Program (CREP). Habitat classes include soft (sand or mud) and hard (rubble, boulders, etc.) substrates by depth (shallow, mid and deep); seagrass, mangrove, and macroalgae dominated areas; intertidal zones; lagoons; and emergent rocks. Supervised classifications were performed using several different methods (maximum likelihood, and minimum distance) with imagery at several different stages of processing (deglinted, radiance, reflectance and deglinted, depth invariant, sieve, and clump), with final classification based on the classification method and imagery variant that provided the best overall results for each WorldView-2 image.
Notes: Only a maximum of 4000 characters will be included.
Notes: Data collection is considered ongoing if a time frame of type "Continuous" exists.
Notes: All time frames from all extent groups are included.
Notes: All geographic areas from all extent groups are included.
(e.g., digital numeric data, imagery, photographs, video, audio, database, tabular data, etc.)
(e.g., satellite, airplane, unmanned aerial system, radar, weather station, moored buoy, research vessel, autonomous underwater vehicle, animal tagging, manual surveys, enforcement activities, numerical model, etc.)
Platform: Not applicable
Physical Collection / Fishing Gear: Not applicable
2. Point of Contact for this Data Management Plan (author or maintainer)
Notes: The name of the Person of the most recent Support Role of type "Metadata Contact" is used. The support role must be in effect.
Notes: The name of the Organization of the most recent Support Role of type "Metadata Contact" is used. This field is required if applicable.
3. Responsible Party for Data Management
Program Managers, or their designee, shall be responsible for assuring the proper management of the data produced by their Program. Please indicate the responsible party below.
Notes: The name of the Person of the most recent Support Role of type "Data Steward" is used. The support role must be in effect.
Programs must identify resources within their own budget for managing the data they produce.
5. Data Lineage and Quality
NOAA has issued Information Quality Guidelines for ensuring and maximizing the quality, objectivity, utility, and integrity of information which it disseminates.
(describe or provide URL of description):
Benthic habitat classes were derived for nearshore waters around Timor-Leste from WorldView-2 satellite imagery. Habitat classes include different combinations of shallow, mid and deep depths, soft (sand or mud) or hard (rubble, boulders, etc.) substrates, macroalgae, seagrass or mangrove dominated areas, intertidal areas, lagoons, and emergent rocks. Supervised classifications were performed using several different methods and with imagery at several different stages of processing, with final classification based on the classification method and imagery variant that provided the best overall results for each WorldView-2 image.
- Satellite imagery was collected by the WorldView-2 commercial Earth observation satellite owned by DigitalGlobe. WorldView-2 provides panchromatic imagery of .46 meter resolution, and eight-band multispectral imagery with 1.84 meter (6 foot 0 inch) resolution.
- Image pre-processing steps are described in the NOAA Technical Memorandum "Depth Derivation Using Multispectral WorldView-2 Satellite Imagery". Pre-processing of all WorldView-2 satellite images was performed using the same methods, to produce a deglinted image, radiance and depth invariant data layers. (Citation: Depth Derivation Using Multispectral WorldView-2 Satellite Imagery, NOAA Technical Memorandum NMFS-PIFSC-46)
- Each image data layer was loaded into ENVI and 13 different regions of interest (ROIs) were created. The ROIs are classified as followed: hard shallow, soft/sand shallow, hard mid depth, soft/sand mid depth, hard deep, soft/sand deep, seagrass, intertidal, mangroves, emergent rocks, macroalgae, and lagoon. Areas within the imagery unable to be classified were annotated as unknown. The Image classification was performed separately on the multi-band image using three different methods: 1) The Mahalanobis Distance Classification, which is a direction sensitive distance classifier. J.A.Richards, 1999, Remote Sensing Digital Image Analysis, Springer-Verlag, Berlin, p. 240. 2) The Maximum Likelihood Distance, which assumes that the statistics for each class in each band are normally distributed. 3) Minimum Distance, which uses the mean vectors for each class and calculates the distance from each unknown pixel the the mean vector for each class. More information about the Mahalanobis Distance, Maximum Liklihood Distance and the Minimum Distance algorithm can be found in the ENVI documentation. The results of each of the three classifications were compiled into an ENVI standard image. The outputs were exported in a geotiff format. (Citation: ENVI)
- Geotiffs were loaded in ArcGIS and all land and NoData values were removed using the Arc toolbox "extract by mask" tool. The outputs were the same eleven classes as the ROI's. Deep sea areas were manually digitized from classified images as a shapefile with reference to the satellite image as needed, then converted to raster files and mosaicked back onto classified images. Shallow lagoons were also manually digitized, converted to raster files , mosaicked back onto the classified imagery. This is required because the habitat derivation method does not work well on very shallow waters in Timor-Leste as these areas often have high turbidity levels. (Citation: ESRI ArcGIS Desktop 10.3, 'Extract by Mask’ tool)
- The complete methodology to classify benthic features using WorldView-2 satellite imagery. (Citation: Watkins, Russell, L., 2015, A Methodology for Classification of Benthic Features using WorldView-2 Imagery, Report prepared for the Ecospatial Information Team, Coral Reef Ecosystem Division, Pacific Islands Fisheries Science Center, Honolulu, HI, under NOAA contract number WE-133F-15-SE-0518, 29pp.)
- The methodology along with the results are described in the final report produced by CREP for the Government of Timor-Leste, Interdisciplinary baseline ecosystem assessment surveys to inform ecosystem-based management planning in Timor-Leste: Final Report. (Citation: PIFSC. 2017. Interdisciplinary baseline ecosystem assessment surveys to inform ecosystem-based management planning in Timor-Leste: Final Report. NOAA Pacific Islands Fisheries Science Center, PIFSC Special Publication, SP-17-02, 234p.)
(describe or provide URL of description):
An experienced outside contractor was hired to review and suggest modifications to improve the the initial methods for deriving benthic habitat data from WorldView-2 satellite imagery.
Three different modifications for both types of processing were performed on each image. A visual comparison of the 6 resulting geotiffs was made to select the one that best reflected the distribution of benthic habitats for each WorldView-2 satellite image.
6. Data Documentation
The EDMC Data Documentation Procedural Directive requires that NOAA data be well documented, specifies the use of ISO 19115 and related standards for documentation of new data, and provides links to resources and tools for metadata creation and validation.
(describe or provide URL of description):
7. Data Access
NAO 212-15 states that access to environmental data may only be restricted when distribution is explicitly limited by law, regulation, policy (such as those applicable to personally identifiable information or protected critical infrastructure information or proprietary trade information) or by security requirements. The EDMC Data Access Procedural Directive contains specific guidance, recommends the use of open-standard, interoperable, non-proprietary web services, provides information about resources and tools to enable data access, and includes a Waiver to be submitted to justify any approach other than full, unrestricted public access.
Notes: The name of the Organization of the most recent Support Role of type "Distributor" is used. The support role must be in effect. This information is not required if an approved access waiver exists for this data.
Notes: This field is required if a Distributor has not been specified.
Notes: All URLs listed in the Distribution Info section will be included. This field is required if applicable.
Data can be accessed online via the NOAA National Centers for Environmental Information (NCEI) Ocean Archive
Notes: This field is required if applicable.
8. Data Preservation and Protection
The NOAA Procedure for Scientific Records Appraisal and Archive Approval describes how to identify, appraise and decide what scientific records are to be preserved in a NOAA archive.
(Specify NCEI-MD, NCEI-CO, NCEI-NC, NCEI-MS, World Data Center (WDC) facility, Other, To Be Determined, Unable to Archive, or No Archiving Intended)
Notes: This field is required if archive location is World Data Center or Other.
Notes: This field is required if archive location is To Be Determined, Unable to Archive, or No Archiving Intended.
Notes: Physical Location Organization, City and State are required, or a Location Description is required.
Discuss data back-up, disaster recovery/contingency planning, and off-site data storage relevant to the data collection
NOAA IRC and NOAA Fisheries ITS resources and assets.
9. Additional Line Office or Staff Office Questions
Line and Staff Offices may extend this template by inserting additional questions in this section.