Tide Gauge Stations Network – Observations
This geographic dataset (GDS) contains the geographic location of the active and historical tide gauge stations operated by the Hydrographic Institute, as well as the corresponding sea surface height (SSH) observations in near-real-time (NRT).
SSH observations (https://vocab.nerc.ac.uk/collection/P07/current/CFSN0374/) are provided in Coordinated Universal Time (UTC, ISO 8601) and referenced to the Hydrographic Zero (ZH, EPSG:10349). Quality control (QC) codes comply with the vocabulary available at https://vocab.nerc.ac.uk/collection/L20/current/.
Processing levels follow an internal convention, where L1 corresponds to data without quality control and L2 to data with automatic quality control (e.g., range checks, spike detection, and temporal consistency tests).
Active tide gauge stations:
tide_obs_stations_nrt
Near-real-time data without quality control (L1):
tide_obs_data_nrt_l1_min — NRT data without quality control (L1), 1-minute sampling frequency, 1-minute latency, and an 8-day rolling time window
tide_obs_data_nrt_l1_sec — NRT data without quality control (L1), 10-second sampling frequency, 1-minute latency, and an 8-day rolling time window
Near-real-time data with automatic quality control (L2):
tide_obs_data_nrt_l2 — NRT data with automatic quality control (L2), 5-minute sampling frequency, 1-day latency, and a 15-day rolling time window
Historical tide gauge stations:
tide_obs_stations_hist
To access the complete observation time series, or specific historical periods, a request should be sent to cedencia.dados@hidrografico.pt.
This dataset is part of the High-Value Datasets (HVD) identified under Implementing Regulation (EU) 2023/138 of Directive (EU) 2019/1024 on open data and the reuse of public sector information.
Citation:
Instituto Hidrográfico (2026): Rede de estações maregráficas - Observações. https://doi.org/10.71683/107bf4e8-ca3e-4bb7-9439-b99f631eee57
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Citation proposal
(2026) . Tide Gauge Stations Network – Observations. https://snig.dgterritorio.gov.pt/rndg/srv/api/records/107bf4e8-ca3e-4bb7-9439-b99f631eee57 |
Simple
- Date ( Publication )
- 2026-05-06
- Credit
- Instituto Hidrográfico (https://www.hidrografico.pt/)
Point of contact
- Maintenance and update frequency
- As needed
- Keywords
-
- Keywords
-
- infoMapAccessService , InfoFeatureAccessService , HVD , NODC-PT , Observações , Marés , Observação da Terra e do ambiente
- Keywords
-
- Keywords
-
- theme.Seadatanet Parameter Disciplines.rdf theme.Seadatanet Parameter Disciplines.rdf ( Theme )
-
- Oceanografia física Oceanografia física Physical oceanography
- GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 ( Theme )
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- Características oceanográficas Características oceanográficas Oceanographic geographical features
- Access constraints
- Other restrictions
- Other constraints
- Acesso público sem restrições Acesso público sem restrições
- Use constraints
- Other restrictions
- Other constraints
- Sem restrições. Licença de utilização - CC-BY-4.0 (https://creativecommons.org/licenses/by/4.0/)
- Spatial representation type
- Vector
- Spatial representation type
- Text, table
- Denominator
- 0
- Metadata language
- Portuguese Portuguese
- Character set
- UTF8
- Topic category
-
- Oceans
))
- Extent type code
- true
- Geographic identifier
- PT
- Reference system identifier
- EPSG / 4326
- Distribution format
-
-
WFS
(2.0.0 )
- Specification
-
WMS
(1.3.0 )
- Specification
-
OGC API - Features
(API - Features )
- Specification
-
WFS
(2.0.0 )
Point of contact
- OnLine resource
- https://webgeo4.hidrografico.pt/geoserver/oceanography/tide_obs_stations_nrt/ows?service=WFS&version=2.0.0&request=GetCapabilities
- OnLine resource
- https://webgeo4.hidrografico.pt/geoserver/oceanography/tide_obs_stations_nrt/ows?service=WMS&version=1.3.0&request=GetCapabilities
- OnLine resource
- https://webgeo4.hidrografico.pt/geoserver/oceanography/tide_obs_data_nrt_l1_min/ows?service=WFS&version=2.0.0&request=GetCapabilities
- Hierarchy level
- Dataset
Conformance result
- Date ( Publication )
- 2010-12-08
- Explanation
- Ver a especificação citada.
- Pass
- false
- Statement
- N/A
gmd:MD_Metadata
- File identifier
- 107bf4e8-ca3e-4bb7-9439-b99f631eee57 XML
- Metadata language
- Portuguese Portuguese
- Character set
- UTF8
- Hierarchy level
- Dataset
- Hierarchy level name
- Conjunto de dados geográficos (Não enquadráveis no INSPIRE)
- Date stamp
- 2026-05-06T13:13:14
- Metadata standard name
- ISO 19115 Sistema de Metadados dos Açores
Point of contact
Overviews
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