Doorvaartopening (vast) Alde Loop

Opening #4023 · route 36567543

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Latest Clearance

pending needs_reference_level_validation

Water station: harlingen.waddenzee Harlingen, Waddenzee
Water observed: 2026-10-12 21:00:00
Water level: 0.630 m
Calculated: 2026-10-12 21:17:01
Formula: pending_reference_level_interpretation

FIS Opening Fields

Source id: fis.opening:4023
Parent id: 55869307 (bridge)
Reference level: n/a
Height closed: 1.280 m
Clearance height closed: 1.800 m
Height opened: n/a
Width: 3.900 m
Sill depth: n/a
Route km: 4.315 - 4.315

Parent Bridge

Name: Alde Loop
Local id: 6670
RWS id: 55869307
Source id: fis.bridge:6670
Reference level: KP
MHW reference: CANAL
MHW offset: n/a
Can open: no

Linked Water Stations

Station	Method	Distance	Confidence	Latest Observation	Level
`harlingen.waddenzee` Harlingen, Waddenzee	nearest_spatial	5,851 m	0.41	2026-10-12 21:00:00	0.630 m

Recent Clearance History

Calculated	Water Observed	Water Level	Clearance	Status	Formula
2026-10-12 21:17:01	2026-10-12 21:00:00	0.630 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 20:16:51	2026-10-12 19:50:00	0.420 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 19:16:40	2026-10-12 18:50:00	0.010 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 18:16:30	2026-10-12 18:00:00	-0.480 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 17:16:19	2026-10-12 16:50:00	-0.990 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 16:16:09	2026-10-12 15:50:00	-0.730 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 15:15:59	2026-10-12 14:50:00	-0.410 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 14:15:48	2026-10-12 13:50:00	-0.110 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 13:15:39	2026-10-12 12:50:00	0.210 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 12:15:28	2026-10-12 11:50:00	0.560 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 11:15:17	2026-10-12 10:50:00	0.940 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 10:15:07	2026-10-12 09:50:00	1.200 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 09:14:57	2026-10-12 08:50:00	1.130 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 08:14:46	2026-10-12 07:50:00	0.830 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 07:14:35	2026-10-12 06:50:00	0.400 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 06:14:22	2026-10-12 05:50:00	-0.250 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 05:14:11	2026-10-12 04:50:00	-0.930 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 04:13:57	2026-10-12 04:00:00	-0.880 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 03:13:47	2026-10-12 02:50:00	-0.500 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`
2026-10-12 02:13:36	2026-10-12 01:50:00	-0.220 m	pending	needs_reference_level_validation	`pending_reference_level_interpretation`

Calculation Basis

{
    "formula": {
        "kind": "pending_reference_level_interpretation",
        "expression": "not_computed_until_reference_level_rule_is_validated",
        "water_source": "water_level_observation.value_m",
        "height_source": "fis_bridge_opening.clearance_height_closed_m",
        "reference_level_source": "fis_bridge.reference_level",
        "reference_level_decision": "parent bridge reference level is available but not interpreted as NAP",
        "effective_reference_level": "KP"
    },
    "station_link": {
        "active": true,
        "method": "nearest_spatial",
        "confidence": 0.4149,
        "distance_m": 5850.68,
        "reviewed_at": null
    },
    "parent_bridge": {
        "id": 6670,
        "name": "Alde Loop",
        "rws_id": "55869307",
        "can_open": false,
        "source_id": "fis.bridge:6670",
        "mhw_offset": null,
        "reference_level": "KP",
        "mhw_reference_level": null
    },
    "bridge_opening": {
        "id": 4023,
        "name": "Doorvaartopening (vast) Alde Loop",
        "route_id": "36567543",
        "source_id": "fis.opening:4023",
        "fairway_id": "36568088",
        "route_km_end": 4.315,
        "route_km_begin": 4.315,
        "height_closed_m": 1.28,
        "height_opened_m": null,
        "reference_level": null,
        "fairway_section_id": "36567673",
        "clearance_height_closed_m": 1.8,
        "clearance_height_opened_m": null
    },
    "water_observation": {
        "value_m": 0.63,
        "value_cm": 63,
        "observed_at": "2026-10-12T21:00:00+00:00",
        "process_type": "meting",
        "quality_code": "00",
        "retrieved_at": "2026-10-12T21:16:54.135751+00:00",
        "station_code": "harlingen.waddenzee",
        "reference_level": "NAP"
    }
}

Geometry GeoJSON

{
    "type": "Point",
    "coordinates": [
        5.4849289,
        53.1491744
    ]
}

Raw FIS JSON

{
    "id": 4023,
    "type": "Feature",
    "geometry": {
        "type": "Point",
        "coordinates": [
            5.484928900000057,
            53.14917440000005
        ]
    },
    "properties": {
        "id": 55869312,
        "name": "Doorvaartopening (vast) Alde Loop",
        "note": null,
        "type": "VST",
        "width": 3.9,
        "isrsid": 55869320,
        "number": 1,
        "geotype": "opening",
        "routeid": 36567543,
        "vincode": "65148102",
        "objectid": 4023,
        "parentid": 55869307,
        "condition": "CONSTRUCTED",
        "fairwayid": 36568088,
        "silldepth": null,
        "routekmend": 4.31492684,
        "foreigncode": null,
        "orientation": null,
        "widthconvoy": 3.9,
        "heightclosed": 1.28,
        "heightopened": null,
        "routekmbegin": 4.315,
        "geogeneration": 3310,
        "parentgeotype": "bridge",
        "fairwaysectionid": 36567673,
        "passagedurationm": 0,
        "clearanceheightclosed": 1.8,
        "clearanceheightopened": null
    }
}