Doorvaartopening (vast) Zandbrug
Opening #54
ยท route 3979
Latest Clearance
4.12 m
ok
- Water station
maarssen.kanaalMaarssen, kanaal- Water observed
- 2026-08-28 05:40:00
- Water level
- -0.420 m
- Calculated
- 2026-08-28 06:10:39
- Formula
kp_clearance_height_adjusted_by_current_nap_water_level
FIS Opening Fields
- Source id
fis.opening:54- Parent id
-
42587(bridge) - Reference level
- n/a
- Height closed
- 3.700 m
- Clearance height closed
- 3.200 m
- Height opened
- n/a
- Width
- 7.260 m
- Sill depth
- n/a
- Route km
- 4.100 - 4.067
Parent Bridge
- Name
- Zandbrug
- Local id
1784- RWS id
42587- Source id
fis.bridge:1784- Reference level
- KP
- MHW reference
- CANAL
- MHW offset
- n/a
- Can open
- no
Linked Water Stations
| Station | Method | Distance | Confidence | Latest Observation | Level |
|---|---|---|---|---|---|
maarssen.kanaal
Maarssen, kanaal
|
nearest_spatial | 6,732 m | 0.33 | 2026-08-28 05:40:00 | -0.420 m |
Recent Clearance History
| Calculated | Water Observed | Water Level | Clearance | Status | Formula |
|---|---|---|---|---|---|
| 2026-08-28 06:10:39 | 2026-08-28 05:40:00 | -0.420 m | 4.120 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-28 05:10:28 | 2026-08-28 04:50:00 | -0.420 m | 4.120 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-28 04:10:15 | 2026-08-28 03:50:00 | -0.410 m | 4.110 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-28 03:10:04 | 2026-08-28 02:50:00 | -0.380 m | 4.080 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-28 02:09:52 | 2026-08-28 01:50:00 | -0.400 m | 4.100 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-28 01:09:40 | 2026-08-28 00:40:00 | -0.420 m | 4.120 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-28 00:09:28 | 2026-08-27 23:50:00 | -0.410 m | 4.110 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 23:09:16 | 2026-08-27 22:40:00 | -0.430 m | 4.130 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 22:09:04 | 2026-08-27 21:50:00 | -0.420 m | 4.120 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 21:08:52 | 2026-08-27 20:50:00 | -0.410 m | 4.110 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 20:08:39 | 2026-08-27 19:30:00 | -0.390 m | 4.090 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 19:08:26 | 2026-08-27 18:40:00 | -0.410 m | 4.110 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 18:08:11 | 2026-08-27 17:30:00 | -0.380 m | 4.080 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 17:07:49 | 2026-08-27 16:40:00 | -0.360 m | 4.060 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 16:07:30 | 2026-08-27 15:40:00 | -0.380 m | 4.080 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 15:07:18 | 2026-08-27 14:30:00 | -0.340 m | 4.040 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 14:07:06 | 2026-08-27 13:30:00 | -0.360 m | 4.060 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 13:06:55 | 2026-08-27 12:30:00 | -0.350 m | 4.050 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 12:06:43 | 2026-08-27 11:40:00 | -0.360 m | 4.060 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
| 2026-08-27 11:06:31 | 2026-08-27 10:30:00 | -0.380 m | 4.080 m | ok | kp_clearance_height_adjusted_by_current_nap_water_level |
Calculation Basis
{
"formula": {
"kind": "kp_clearance_height_adjusted_by_current_nap_water_level",
"expression": "clearance_height_closed_m + ((height_closed_m - clearance_height_closed_m) - water_level_m)",
"water_source": "water_level_observation.value_m",
"height_source": "fis_bridge_opening.clearance_height_closed_m adjusted by inferred KP level",
"kp_reference_level_nap": 0.5,
"reference_level_source": "fis_bridge.reference_level",
"reference_level_decision": "KP is treated as fixed kanaalpeil; FIS clearance height is adjusted by the current NAP water level delta from inferred KP",
"effective_reference_level": "KP",
"current_water_delta_from_kp_m": -0.92
},
"station_link": {
"active": true,
"method": "nearest_spatial",
"confidence": 0.3268,
"distance_m": 6732.48,
"reviewed_at": null
},
"parent_bridge": {
"id": 1784,
"name": "Zandbrug",
"rws_id": "42587",
"can_open": false,
"source_id": "fis.bridge:1784",
"mhw_offset": null,
"reference_level": "KP",
"mhw_reference_level": null
},
"bridge_opening": {
"id": 54,
"name": "Doorvaartopening (vast) Zandbrug",
"route_id": "3979",
"source_id": "fis.opening:54",
"fairway_id": "36083",
"route_km_end": 4.067,
"route_km_begin": 4.1,
"height_closed_m": 3.7,
"height_opened_m": null,
"reference_level": null,
"fairway_section_id": "30773",
"clearance_height_closed_m": 3.2,
"clearance_height_opened_m": null
},
"water_observation": {
"value_m": -0.42,
"value_cm": -42,
"observed_at": "2026-08-28T05:40:00+00:00",
"process_type": "meting",
"quality_code": "00",
"retrieved_at": "2026-08-28T06:10:32.73082+00:00",
"station_code": "maarssen.kanaal",
"reference_level": "NAP"
}
}
Geometry GeoJSON
{
"type": "Point",
"coordinates": [
5.116116554,
52.0961795
]
}
Raw FIS JSON
{
"id": 54,
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [
5.11611655400003,
52.09617950000006
]
},
"properties": {
"id": 2326,
"name": "Doorvaartopening (vast) Zandbrug",
"note": null,
"type": "VST",
"width": 7.26,
"isrsid": 9069021,
"number": 1,
"geotype": "opening",
"routeid": 3979,
"vincode": "8044",
"objectid": 54,
"parentid": 42587,
"condition": "CONSTRUCTED",
"fairwayid": 36083,
"silldepth": null,
"routekmend": 4.06673973,
"foreigncode": null,
"orientation": null,
"widthconvoy": 7.26,
"heightclosed": 3.7,
"heightopened": null,
"routekmbegin": 4.1,
"geogeneration": 4362,
"parentgeotype": "bridge",
"fairwaysectionid": 30773,
"passagedurationm": 0,
"clearanceheightclosed": 3.2,
"clearanceheightopened": null
}
}