cartevoirUser guide · Asset exposure and alerts
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Asset exposure and alerts

Which of your sites a hazard reaches, how it is worked out, and what does not happen yet.

What you get: A list of your sites that sit inside or near a current hazard on the map, and an email of that list to yourself when you ask for one.

Before you start

  • Sites imported (see Add your own sites and routes), and the hazard layers you care about switched on. Emailing a brief needs you to be signed in.

Steps

  1. Import your sites. The "Your data" section of the "LAYERS" panel lists intersections between your sites and the hazards currently loaded.
  2. Each line says the relation: inside a warning polygon, overlapping a perimeter, or within a distance of a point hazard.
  3. Choose "Email me this brief" to send the current list to the email on your account.
  4. For a standing watch over an area, choose Tools → "Draw an area of interest": two clicks draw a box. Its panel reports what evidence exists there — satellite scene recency and the open activity already loaded — not what is happening on the ground.

What is checked

  • NWS alert polygons (United States)
  • Wildfire perimeters and thermal hotspots
  • Earthquakes, with a felt-range radius that is a rule of thumb, not physics
  • Storm cells
  • GDACS disaster events

A route is tested at its vertices and at points sampled about every 2 km along it, and says "(sampled)".

What success looks like

The intersection list matches what you see on the map, because it is computed from the same loaded data.

Limits to know

  • Alerts are worked out in your browser while the map is open. Nothing watches your sites while the browser is closed, and no email is sent unless you ask for it.
  • The brief goes only to your own account's email, at most once every five minutes.
  • A hazard layer that is switched off, or outside its coverage, cannot produce an alert. No alert is not the same as no hazard.
  • Team routing of alerts and automatic scheduled alerts are not built yet.

If something is wrong

"Sign in to email yourself a brief."
Emailing needs an account; the on-map list works without one.
No intersections, but a storm is right over my site.
Check the matching hazard layer is on and that it covers your region — NWS alerts, for example, cover the United States only.

Related

Last checked against the product on 23 September 2026. Live contents change; this describes how the product works.