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A map-based situational awareness system for search and rescue operations, as well as event coordination such as event first aid cover and security staff management.

Versatile for large operations, simple enough for everyday use.

Multiple teams and command staff share their locations and add annotations to the same map in real time — on mobile and in the browser.

Karttahimmeli app in use during an operation

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Why it matters¶

Verbal location reports are slow and easy to misread. A single misheard grid reference, or a moment of confirmation bias under time pressure, can cost hours — or a life. Karttahimmeli keeps every marking, track, and observation in one shared record that survives shift changes and stays with the operation, not with one person's phone.

Key features¶

Real-time team map — see every member's live position and movement trail
Draw markers, lines, and areas — mark search zones, finds, hazards, and assignments; everyone sees updates instantly
Observation log — a running, searchable record of everything reported during the operation
GPS track history — review where each team has already searched
Works offline — map tiles cache automatically as you browse, so the app keeps working without signal in the field; queued locations and markings sync once connection returns
National topographic and aerial maps for 20+ countries, switching automatically between road, terrain, orienteering-style laser-contour, and aerial imagery as you zoom
Property boundaries and address maps in many countries; official nautical charts for Finland's coastal and inland waters
Navigation mode — the map rotates with your heading and centres on your position, hands-free
50 m coordinate grid — built for event first aid and security teams to report locations by simple grid cell (e.g. "B7")
Two-part team/member IDs, quick team shortcuts, and print-ready maps for briefings