Gloucester, MA Tide Gauge
type: Dataset
description: Tide gauge located in Gloucester, MA. Funded by NERACOOS. Data is reported in elevation above MLLW (NAVD88) in feet and also converted to meters. NOAA uses Mean Lower Low Water (MLLW), which is the average height of the lowest tide recorded at a tide station each day during a 19-year recording period, known as the National Tidal Datum Epoch.[5] MLLW is only a mean, so some tidal levels may be negative relative to MLLW; see also mean low water spring. The 19-year recording period is the nearest full year count to the 18.6-year cycle of the lunar node regression, which has an effect on tides. At this location Mean Sea Level (MSL) is 1.453 meters above MLLW Benchmark used: NOAA Station ID: 8441841 - GLOUCESTER HARBOR (with extrapolated estimate) MSL meters = (MLLW ft. * 0.3048) + GUAGE location correction.
keyword: amerigeo
keyword: amerigeoss
keyword: ckan
keyword: gauge
keyword: geo
keyword: geoss
keyword: hampton
keyword: hobolink
keyword: latitude
keyword: longitude
keyword: mean
keyword: meter
keyword: mllw
keyword: msl
keyword: national
keyword: neracoos
keyword: north-america
keyword: onset
keyword: sea
keyword: station
keyword: temp
keyword: temperature
keyword: tide
keyword: time
keyword: united-states
keyword: water-level
issued: 2025-11-22T17:16:53.714916
modified: 2025-11-22T17:16:53.714921
spatial: Location

US Migrating
type: Agent

Data Subset Form
type: Distribution
description: ERDDAP's version of the OPeNDAP .html web page for this dataset. Specify a subset of the dataset and download the data via OPeNDAP or in many different file types.
format: HTML
access URL: http://www.neracoos.org/erddap/tabledap/ONSET_gloucester_hourly_water_level.html
issued: 2021-07-09T21:02:08.733053
modified: 2025-11-22T17:16:53.697317

Make-A-Graph Form
type: Distribution
description: ERDDAP's Make-A-Graph .html web page for this dataset. Create an image with a map or graph of a subset of the data.
access URL: http://www.neracoos.org/erddap/tabledap/ONSET_gloucester_hourly_water_level.graph
issued: 2021-07-09T21:02:08.733060
modified: 2025-11-22T17:16:53.697726

Background Information
type: Distribution
description: Background information from the source
format: EXE
access URL: http://hobolink.com
issued: 2021-07-09T21:02:08.733063
modified: 2025-11-22T17:16:53.698122

Background Information
type: Distribution
description: Background information from the source
format: EXE
access URL: http://hobolink.com
issued: 2021-07-09T21:02:08.733065
modified: 2025-11-22T17:16:53.698526

Background Information
type: Distribution
description: Background information from the source
format: EXE
access URL: http://hobolink.com
issued: 2021-07-09T21:02:08.733068
modified: 2025-11-22T17:16:53.698941

ERDDAP-tabledap
type: Distribution
description: ERDDAP's tabledap service (a flavor of OPeNDAP) for tabular (sequence) data. Add different extensions (e.g., .html, .graph, .das, .dds) to the base URL for different purposes.
access URL: http://www.neracoos.org/erddap/tabledap/ONSET_gloucester_hourly_water_level
issued: 2021-07-09T21:02:08.733070
modified: 2025-11-22T17:16:53.699329

Background Information
type: Distribution
description: Background information from the source
format: EXE
access URL: http://hobolink.com
issued: 2021-07-09T21:02:08.733073
modified: 2025-11-22T17:16:53.699698

OPeNDAP
type: Distribution
description: An OPeNDAP service for tabular (sequence) data. Add different extensions (e.g., .html, .das, .dds) to the base URL for different purposes.
access URL: http://www.neracoos.org/erddap/tabledap/ONSET_gloucester_hourly_water_level
issued: 2021-07-09T21:02:08.733075
modified: 2025-11-22T17:16:53.700061