Eel grass coverage, 2015, Cape Cod National Seashore

This dataset shows the eelgrass data extent identified from the acoustic surveys completed within and adjacent to the boundaries of Cape Cod National Seashore (CaCo) from Duck Harbor to Jeremy Point in Cape Cod Bay, and Wellfleet Harbor from Wellfleet to Eastham, Massachusetts, August 10 – December 12, 2015, and July 12 – September 7, 2016. Full coverage sidescan and partial coverage bathymetry data were collected using an Edgetech 6205 Phase-Measuring Sidecan Sonar. In total, 5723.8 hectares of sidescan imagery were mapped at primarily 20 – 40 meter line spacing and 50 meter swath range to allow overlap of lines and a total of 19.3 hectares were identified as Eelgrass. The minimum mapping unit for this study site for eelgrass was 100 square meters and was hand digitized from individual sidescan sonar files at a visual extent of 1:1000 m.

Data and Resources

Field Value
accessLevel public
bureauCode {010:24}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
dataQuality true
identifier NPS_DataStore_2278519
issued 2019-03-01
landingPage https://irma.nps.gov/DataStore/Reference/Profile/2278519
modified 2019-03-01
old-spatial -70.25153,41.5994949,-69.92308,42.0868835
programCode {010:118,010:119}
publisher National Park Service
references {https://irma.nps.gov/DataStore/Reference/Profile/2278519}
resource-type Dataset
source_datajson_identifier true
source_hash 69860068c09461393436aeb1d3e7be2fa060d956
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[-70.25153, 41.5994949], [-70.25153, 42.0868835], [-69.92308, 42.0868835], [-69.92308, 41.5994949], [-70.25153, 41.5994949]]]}
temporal 2015-08-10/2016-09-07
theme {"Geospatial Dataset"}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • benthic-ecology
  • benthic-habitat
  • benthic-habitat-mapping
  • caco
  • cape-cod
  • cape-cod-national-seashore
  • ckan
  • eelgrass
  • geo
  • geoss
  • hurricane-sandy
  • hxsandy
  • marine-geology
  • national
  • ncbn
  • north-america
  • northeast-coastal-and-barrier-network
  • phase-measuring-sidescan-sonar
  • seafloor
  • seafloor-mapping
  • sediment
  • submerged-habitat
  • submerged-habitat-mapping
  • united-states
isopen False
license_id notspecified
license_title License not specified
maintainer NPS IRMA Help
maintainer_email irma@nps.gov
metadata_created 2025-11-20T23:42:20.998884
metadata_modified 2025-11-20T23:42:20.998887
notes This dataset shows the eelgrass data extent identified from the acoustic surveys completed within and adjacent to the boundaries of Cape Cod National Seashore (CaCo) from Duck Harbor to Jeremy Point in Cape Cod Bay, and Wellfleet Harbor from Wellfleet to Eastham, Massachusetts, August 10 – December 12, 2015, and July 12 – September 7, 2016. Full coverage sidescan and partial coverage bathymetry data were collected using an Edgetech 6205 Phase-Measuring Sidecan Sonar. In total, 5723.8 hectares of sidescan imagery were mapped at primarily 20 – 40 meter line spacing and 50 meter swath range to allow overlap of lines and a total of 19.3 hectares were identified as Eelgrass. The minimum mapping unit for this study site for eelgrass was 100 square meters and was hand digitized from individual sidescan sonar files at a visual extent of 1:1000 m.
num_resources 1
num_tags 26
title Eel grass coverage, 2015, Cape Cod National Seashore