• Fire Island National Seashore Bathymetry Data, 50cm-Resolution 2015

    Metadata Updated: March 17, 2021

    These data present the processed bathymetry mosaic for FIIS. The bathymetry data was collected June 11th-16th, 2015. The acoustic sonar survey was conducted using a EdgeTech 6205, a Multi-Phase Echo sounder system. This combined bathymetry and dual-frequency sidescan sonar system is optimized for shallow water surveying and is capable of acquiring bathymetry swath widths up to 8x the water depth. The sonar system was bow-mounted to a 28-ft pontoon survey vessel customized for shallow water surveying, including having a draft of less than one foot. Data was collected using GeoDas software developed by Ocean Imaging Consultants (OIC) and monitored topside in real-time to ensure quality of data and full-coverage sidescan was being achieved. The data were collected in association with an Applanix POS MV system to assure positional accuracy and to correct for vessel motion (pitch, roll, heave). The survey was designed to acquire full-coverage sidescan data and partial coverage bathymetry. As such, the survey was composed of parallel track lines with line spacing of 35 to 50 m and a sonar swath range of 50 m (25 m per side) to ensure overlap with adjacent lines. The raw sidescan and bathymetry records were processed using OIC CleanSweep software (Version 3.8.0, Build #263). For bathymetry, the processing following standard techniques of first correcting for tide, sound velocity, and vessel motion. Filters were then applied to remove outlier soundings. The resulting mosaic presents water depths of the survey area. All of the acoustic data were examined manually to confirm quality and accuracy. The horizontal coordinate system was set to UTM Zone 18N and bathymetry data was processed to 50cm pixel resolution.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided.

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    Metadata Created Date March 17, 2021
    Metadata Updated Date March 17, 2021

    Metadata Source

    Harvested from NPS-Harvest - NRSS Data Store

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date March 17, 2021
    Metadata Updated Date March 17, 2021
    Publisher National Park Service
    Unique Identifier Unknown
    Identifier NPS_DataStore_2278032
    Data First Published 2017-04-19
    Data Last Modified 2017-04-19
    Category Geospatial Dataset
    Public Access Level public
    Bureau Code 010:24
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID D:\IRMA\DataStore\Application\OpenData\v1.1\NPS-DataStore.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Data Quality True
    Harvest Object Id e57315ee-0397-446d-bc8c-73fe23ff7097
    Harvest Source Id a73e9b95-126c-4791-a8f2-46fc064cdc62
    Harvest Source Title NPS-Harvest - NRSS Data Store
    Homepage URL https://irma.nps.gov/DataStore/Reference/Profile/2278032
    Program Code 010:118, 010:119
    Related Documents https://irma.nps.gov/DataStore/Reference/Profile/2278032
    Source Datajson Identifier True
    Source Hash a4a494e2df6011fc3d6fe91db70c2476f19a8061
    Source Schema Version 1.1
    Spatial -73.23551,40.62486,-72.7532,40.7806244
    Temporal 2014-01-01/2015-01-01

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