Vector Field | Zyeon UI

status="ready" · defaults (arrows, colour by magnitude) · click a node or tab in and press Enter to pin it

Surface wind, Kestrel Bight

10 km buoy lattice · 06:00 UTC · land carries no measurement

313 vectors · 26 × 14 lattice · every node drawn

0 m/s11.89 m/sWind speed
a dot with no arrow is a measured node; a blank cell was never measured

Length and colour carry the same quantity, so the picture survives greyscale; direction is the rotation, and it is written out in the readout and the table.

Strongest vectors in Surface wind, Kestrel Bight, whether or not the drawing stride keeps their arrows. Bearings are the direction each vector points toward, measured clockwise from the top of the plot.
East	North	Wind speed	Bearing
90 km	50 km	11.89 m/s	107°, east
80 km	40 km	11.87 m/s	113°, south-east
110 km	50 km	11.79 m/s	70°, east
120 km	50 km	11.78 m/s	56°, north-east
130 km	60 km	11.72 m/s	36°, north-east

Same field, mode="both" — streamlines say where the air goes, arrows say what it is doing here · calmBelow={0.8} rings the five nodes under 0.8 m/s (four in the lee of the headland, one at the eye of the low) rather than claiming a direction for them · the coast is holes, and every line stops at one

Surface wind, Kestrel Bight

10 km buoy lattice · 06:00 UTC · land carries no measurement

313 vectors · 26 × 14 lattice · every node drawn · 79 streamlines

0 m/s11.89 m/sWind speed
calm (at or under 0.8 m/s)
a dot with no arrow is a measured node; a blank cell was never measured

Length and colour carry the same quantity, so the picture survives greyscale; direction is the rotation, and it is written out in the readout and the table. Streamlines are traced with a midpoint integrator and stopped where they come within a line already drawn, so the spacing is even rather than accidental.

Strongest vectors in Surface wind, Kestrel Bight, whether or not the drawing stride keeps their arrows. Bearings are the direction each vector points toward, measured clockwise from the top of the plot.
East	North	Wind speed	Bearing
90 km	50 km	11.89 m/s	107°, east
80 km	40 km	11.87 m/s	113°, south-east
110 km	50 km	11.79 m/s	70°, east
120 km	50 km	11.78 m/s	56°, north-east
130 km	60 km	11.72 m/s	36°, north-east

mode="streamlines" · the section is 600 m wide and 120 m deep, five times wider than it is tall, and the card is not — so every angle here is drawn with about 3× vertical exaggeration, which the note under the plot names rather than leaving the reader to take the drawn angles for real ones

Aquifer cross-section, Marlow Vale

Darcy velocity · infiltration basin at 120 m, abstraction well at 437 m

241 vectors · 25 × 12 lattice · every node drawn · 49 streamlines

0 m/day1.288 m/daySeepage velocity
a dot with no arrow is a measured node; a blank cell was never measured

Length and colour carry the same quantity, so the picture survives greyscale; direction is the rotation, and it is written out in the readout and the table. Streamlines are traced with a midpoint integrator and stopped where they come within a line already drawn, so the spacing is even rather than accidental. The axes are drawn at different scales: one elevation unit takes 3.0× the pixels of one distance unit, so drawn angles are plot angles — the printed bearings are the true ones. Pass aspect="equal" to make the two agree.

Strongest vectors in Aquifer cross-section, Marlow Vale, whether or not the drawing stride keeps their arrows. Bearings are the direction each vector points toward, measured clockwise from the top of the plot.
Distance	Elevation	Seepage velocity	Bearing
425 m	0 m	1.288 m/day	75°, east
425 m	-10 m	0.88 m/day	64°, north-east
400 m	0 m	0.839 m/day	87°, east
375 m	0 m	0.758 m/day	89°, east
350 m	0 m	0.723 m/day	90°, east

Same section at aspect="equal" — one metre across is one metre down, the plot shrinks to the shape the data actually has, and the arrows now point where the water really goes

Aquifer cross-section, Marlow Vale

Darcy velocity · infiltration basin at 120 m, abstraction well at 437 m

241 vectors · 25 × 12 lattice · 87 arrows drawn · 14 streamlines

0 m/day1.288 m/daySeepage velocity
a dot with no arrow is a measured node; a blank cell was never measured

Length and colour carry the same quantity, so the picture survives greyscale; direction is the rotation, and it is written out in the readout and the table. Too many nodes for the space: drawing every 1 columns and every 3 rows, 87 arrows of 241. Streamlines are traced with a midpoint integrator and stopped where they come within a line already drawn, so the spacing is even rather than accidental.

Strongest vectors in Aquifer cross-section, Marlow Vale, whether or not the drawing stride keeps their arrows. Bearings are the direction each vector points toward, measured clockwise from the top of the plot.
Distance	Elevation	Seepage velocity	Bearing
425 m	0 m	1.288 m/day	75°, east
425 m	-10 m	0.88 m/day	64°, north-east
400 m	0 m	0.839 m/day	87°, east
375 m	0 m	0.758 m/day	89°, east
350 m	0 m	0.723 m/day	90°, east

lengthScale="sqrt" · colorByMagnitude={false} · aspect="equal" · a 12 m/s jet inside a 0.32 m/s drift: drawn linearly the ambient arrows are 3% of the longest one and vanish, and with colour switched off length is the only channel left to carry them. Equal aspect makes the plot as narrow as the scan really is, so minArrowSpacing thins it to every second column and says so.

Stack plume, cross-section

Lidar scan across the plume · 12 m/s core inside a 0.32 m/s ambient drift

208 vectors · 13 × 16 lattice · 112 arrows drawn

0 m/s12.02 m/sAir speed (square-root scale)

Length and colour carry the same quantity, so the picture survives greyscale; direction is the rotation, and it is written out in the readout and the table. Too many nodes for the space: drawing every 2 columns and every 1 rows, 112 arrows of 208.

Strongest vectors in Stack plume, cross-section, whether or not the drawing stride keeps their arrows. Bearings are the direction each vector points toward, measured clockwise from the top of the plot.
Cross-wind offset	Height above stack	Air speed	Bearing
0 m	0 m	12.02 m/s	2°, north
0 m	4 m	10.34 m/s	2°, north
0 m	8 m	8.94 m/s	3°, north
0 m	12 m	7.81 m/s	3°, north
3 m	12 m	7.27 m/s	1°, north

Degenerate feed — 62 samples: three unusable (two NaN components, one infinite coordinate), two re-sends of a node already taken, three probe dropouts left as holes, a four-node dead zone of exact zeros drawn as calm rings, and a fixed x domain that measures two columns without drawing them. Half the rows compute x as i / 10 and half as i * 0.1, which disagree at 0.3, 0.6 and 0.7 — uncanonicalised that alone would make 13 columns out of 10.

Mixing chamber, uncleaned scan

Raw probe feed: drifting coordinates, re-sends, dropouts and a dead zone

57 vectors · 10 × 6 lattice · every node drawn · 15 not drawn

0 mm/s1.486 mm/sFlow
calm
a dot with no arrow is a measured node; a blank cell was never measured

Length and colour carry the same quantity, so the picture survives greyscale; direction is the rotation, and it is written out in the readout and the table. The axes are drawn at different scales: one cell x unit takes 1.2× the pixels of one cell y unit, so drawn angles are plot angles — the printed bearings are the true ones. Pass aspect="equal" to make the two agree. 2 samples landed on coordinates already taken and replaced what was there. 3 samples carried a value that is not a number and were dropped. 12 nodes fall outside the fixed domain and are not drawn.

Strongest vectors in Mixing chamber, uncleaned scan, whether or not the drawing stride keeps their arrows. Bearings are the direction each vector points toward, measured clockwise from the top of the plot.
Cell x	Cell y	Flow	Bearing
0.2 m	0.5 m	1.486 mm/s	70°, east
0.6 m	0.5 m	1.483 mm/s	109°, east
0.7 m	0.5 m	1.464 mm/s	107°, east
0.3 m	0.5 m	1.453 mm/s	74°, east
0.1 m	0.5 m	1.441 mm/s	76°, east

One towed line: 23 stations, one row. Arrows are exact, but there is no second row to interpolate across, so the streamline layers stay reachable, explain themselves on hover and refuse — aria-disabled, never the native attribute.

Ferry-track ADCP transect

One towed line at 3 m depth — 23 stations, no second row to interpolate across

23 vectors · 23 × 1 lattice · every node drawn

0 kn1.86 knSurface current

Length and colour carry the same quantity, so the picture survives greyscale; direction is the rotation, and it is written out in the readout and the table. The axes are drawn at different scales: one depth unit takes 5.0× the pixels of one distance along track unit, so drawn angles are plot angles — the printed bearings are the true ones. Pass aspect="equal" to make the two agree.

Strongest vectors in Ferry-track ADCP transect, whether or not the drawing stride keeps their arrows. Bearings are the direction each vector points toward, measured clockwise from the top of the plot.
Distance along track	Depth	Surface current	Bearing
12 km	-3 m	1.86 kn	88°, east
10 km	-3 m	1.804 kn	87°, east
8 km	-3 m	1.747 kn	85°, east
14 km	-3 m	1.736 kn	91°, east
6 km	-3 m	1.715 kn	85°, east

320 free-drifting floats, wherever the water took them. The lattice is derived from the coordinates, so scattered positions ask for a 319 × 317 grid of which 0.3% was ever measured — the component refuses, and says exactly what it was handed instead of inventing a field.

Drifter fixes, last 6 hours

Free-drifting floats — positions wherever the water took them

These samples are not a lattice

320 samples imply a 319 × 317 grid — 101,123 nodes, far more than the field can draw. A vector field puts one arrow on every node of a regular lattice; bin these readings onto a grid upstream, or plot them as a scatter.

status="empty" — the run finished, no buoy reported

Surface wind, Kestrel Bight

10 km buoy lattice · 06:00 UTC

Nothing to point yet

A field needs samples carrying a position and both vector components.

status="loading" — a deterministic swirl of placeholder arrows, still and readable under prefers-reduced-motion

Surface wind, Kestrel Bight

10 km buoy lattice · 06:00 UTC

status="error" with onRetry — retried 0 times

Surface wind, Kestrel Bight

10 km buoy lattice · 06:00 UTC

Couldn't load this vector field

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