Map‐Layers

Map Layers

OpenHamClock's map supports dozens of toggleable layers. Enable/disable them in Settings → Map Layers or with keyboard shortcuts.

Layer Categories

Amateur Radio

Layer	Description	Keyboard
DX Cluster Paths	Great-circle arcs from spotter to DX station, color-coded by band
Contest QSOs	Live QSO arcs from N1MM+/DXLog during contests
PSK Reporter	Digital mode reception paths (via MQTT)
RBN (Reverse Beacon)	CW/RTTY/FT8 skimmer spots with SNR and paths
WSPR	WSPR propagation paths with signal strength, band activity charts
POTA Parks	Parks on the Air locations
SOTA Summits	Summits on the Air locations
WWFF Sites	Flora and Fauna reference areas
N3FJP Logged QSOs	QSO arcs from N3FJP logging software

Weather

Layer	Description	Keyboard
Tornado Warnings	NWS tornado/severe thunderstorm warnings and watches
Lightning	Real-time lightning strikes from Blitzortung with proximity alerts
Cloud Cover	OpenWeatherMap cloud layer (requires API key)

Propagation

Layer	Description	Keyboard
Gray Line	Dawn/dusk terminator with solar position
MUF Map	Maximum Usable Frequency from ionosonde network
VOACAP Heatmap	ITU-R P.533 propagation reliability grid

Satellites

Layer	Description	Keyboard
Satellite Tracks	Real-time satellite positions and ground tracks

Overlays

Layer	Description
DE/DX Markers	Station and DX target markers on map (toggle with /)
DX News Ticker	Scrolling DX news headlines across bottom of map

Keyboard Shortcuts

Press ? to see all keyboard shortcuts. Each map layer can be assigned a single-key shortcut for quick toggling. Press / to toggle DE/DX markers.

Floating Panels

Many layers add floating control panels on the map (e.g., Lightning stats, WSPR filters, RBN controls). These panels can be:

• Dragged by the title bar to reposition
• Minimized with the arrow button
• Double-clicked to reset position
• Snapped to a 5px grid while dragging

Panel positions are saved to localStorage and persist across sessions.

Plugin System

Map layers use a plugin architecture. Each layer is a self-contained file in src/plugins/layers/ that exports metadata and a useLayer hook. See Development Guide for how to create new layers.