Tools

Diagnostic pages. You do not need any of these to fly with Windmap. They exist to check the overlay against XCTrack and to record what was measured.

Checking the overlay against XCTrack

Overlay registration Draws a grid over XCTrack's map so you can see whether the two line up. Use this if the arrows look shifted. CSS pixel ruler A ruler across the screen. Read XCTrack's own scale bar against it and you get its map resolution directly, with no assumption of ours in the way. This is the instrument that settled how the scale works.

The marker itself

Marker geometry Every fill and rim colour pair, at every size, so the whole scale can be judged at once. Nudged markers over terrain Two stations too close to draw side by side: the second is moved down and faded. Judge here whether its speed and altitude stay legible, the widget's own canvas cannot be screenshotted, this can. arrow.svg The master shape, editable.

Publishing

Social preview card The 1200×630 image chat apps show when the link is pasted. Two headless-Chrome commands, both in a comment at the top of the file. Pick a moment when the readings are fresh: see the note there.

What this device can do

Capability probe Storage, network, WebGL and screen density, as XCTrack's browser reports them. Run this on a phone that misbehaves. Tap pass-through Answered: taps do not pass through to XCTrack underneath. Kept so the answer can be re-checked when XCTrack changes.

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