Heavy metals - Mercury (median values)
This API provides access to a geospatial data layer showing median concentration values of mercury among heavy metals monitored in Greek marine and coastal waters. It is published by the Hellenic Centre for Marine Research (HCMR) as part of the EMODnet shared WMS service, offering map-based access to marine contaminant monitoring data. The dataset supports environmental assessment and research on heavy metal pollution levels, and can be used by researchers, policymakers, and environmental agencies to evaluate marine water quality on a national scale within Greece.Heavy metals - Mercury (median values)
Trust score
How is this computed?Weighted across five axes. Tap a ring for what it measures.
Data schema (6 fields)
Click a field to see example values.
| Field | Type | Description |
|---|---|---|
| the_geomThe geom | geometry | Geometry of the measurement location.Geometry of the measurement location. |
| LongitudeLongitude | double | Longitude coordinate of the monitoring station.Longitude coordinate of the monitoring station. |
| LatitudeLatitude | double | Latitude coordinate of the monitoring station.Latitude coordinate of the monitoring station. |
| median_valuesMedian values | double | Median measured concentration of mercury at the site.Median measured concentration of mercury at the site. |
| Matrix | string | Environmental medium sampled, such as water.Environmental medium sampled, such as water. |
| matrix | string | Environmental medium sampled, such as water.Environmental medium sampled, such as water. |
Schema captured from wfs 1 month ago.
Query the data
Pick columns and a sort, then fetch a live preview straight from the source. Choose an API-filterable column (marked ▾) under “Where” to pick from its list of values.
Sample data (3 records)
| Longitude | Latitude | median_values | Matrix |
|---|---|---|---|
| -8.936 | 41.745 | 0.0075 | Water |
| -8.89 | 41.646 | 0.0075 | Water |
| -8.853 | 41.545 | 0.0075 | Water |
Live sample captured at profiling time — values may have changed upstream.
Verification Status
Using the API
Query examples
curl -s 'https://geoserver.hcmr.gr/geoserver/EMODNET_SHARED/wfs?service=WFS&version=2.0.0&request=GetCapabilities#mercury_concentration_median_values' -H 'Accept: application/json'List the feature types (layers) and supported operations.
Dataset
Volume & freshness
License
No license declared upstream.
Machine-readable & source
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