Auto Zoom

🇮🇱 עברית

Auto zoom

Every place NavAid changes the zoom for you, what triggers it, and the gist key that governs it. Nothing here changes the zoom while you are simply flying and looking at the chart — each one is tied to an action.

Following the aircraft

The only automatic zoom that happens without you pressing something on the map.

When	What happens
The first fix — Location or Record finds you	Centres on the aircraft and clamps the zoom into a flying band
Turning the follow switch on	Same: re-centre and clamp
Every later fix while following	Re-centres only. The zoom is left exactly as you set it.
Following resuming after a hand pan (followResumeMs, 5 s)	Re-centres only. Zoom untouched.

The band depends on where the aircraft is:

	closest (floor)	widest (ceiling)
Inside a control zone	followZoomCtrFloor 12	followZoomCtrCeiling 15
Everywhere else	followZoomFloor 10	followZoomCeiling 14

In a CTR the questions are close-in ones — which reporting point, which runway, where the traffic is — and a 40-mile view answers none of them. En route the opposite.

It is a clamp, not a setting: a zoom already inside the band is a deliberate choice about how much chart to see, and is left alone. Whether you are in a CTR is read from the airspace geometry, not from the airspace layer being switched on.

Worth knowing: at z15 outside a CTR, re-engaging follow pulls you out to 14, because 15 is above the en-route ceiling. Inside a CTR the same zoom is left alone. If you fly at 15, raise followZoomCeiling.

An inverted band (floor above ceiling) changes nothing — it is treated as "not a band", so a typo cannot re-frame the map to something arbitrary. Setting floor = ceiling forces one exact zoom. Setting 6 / 18 on both pairs turns the framing off entirely.

Fitting something into view

All of these are actions you take, and all cap how far in they will go — a single point or a tiny area would otherwise zoom to the maximum and lose all context.

Action	Max zoom	Padding	Also
Fit route	fitRouteMaxZoom 11	fitRoutePaddingPx 70	With no route: fitRouteEmptyZoom 9 at the default view
Show a NOTAM on the map	fitNotamMaxZoom 11	fitNotamPaddingPx 80	A single-point NOTAM zooms no further out than fitNotamPointZoom 10
Show a recorded GPS track	fitTrackMaxZoom 13	fitTrackPaddingPx 60	A one-point track: fitTrackPointZoom 12
Open an IFR plate overlay	fitPlateMaxZoom 13	fitPlatePaddingPx 24	Skipped entirely while a position is live — see below
Jump to an altitude pair	fitAltPairMaxZoom 12	fitAltPairPaddingPx 80
Jump to an LSA area	fitAreaMaxZoom 12	fitAreaPaddingPx 40
Fit a metre-box (georeferencing)	—	fitBoxPaddingPx 30

A live position wins. Opening a plate overlay does not move the map while Location or Record is on: the map is showing where you are, and that outranks framing a chart.

Zoom that is not the map's

Two panels have a zoom of their own, unrelated to the map's:

• Satellite preview in the airfield inspector — satellitePreviewZoom 16, and satelliteExpandedZoom 17 when opened out. The slider is bounded by satelliteMinZoom 13 and satelliteMaxZoom 18.
• Magnifier — magBaselineZoom 12 is the zoom its magnification is measured against.

Zoom by hand

• Double tap zooms in one step. Over a route element — a waypoint, a leg, a callout — the app takes the gesture itself and performs the zoom, because letting the browser handle it would also fire the leg-split handler and cut the route in two.
• First run opens at defaultViewZoom 11.
• Printing can nudge the fitted zoom: a3FitZoomOffset / a4FitZoomOffset, both 0 by default.
• Charts are published to a maximum native zoom (z13 for CVFR); beyond that the app overzooms the same tiles rather than showing blank. See Map Layers.

See also

• The Map — the follow switch itself
• Tuning Panel — where these keys live and how the gist overrides them
• Map Layers — native zoom and export