A nearly live map of Meshtastic nodes seen by the official Meshtastic MQTT server

The Knot Atlas is a website, an encyclopedia rather than atlas, dedicated to knot theory. It and its predecessor were created by mathematician Dror Bar-Natan, who maintains the current site with Scott Morrison.

Welcome to the Knot Atlas! This site aims to be a complete user-editable knot atlas, in the wiki spirit of Wikipedia. It is being developed primarily by Scott and Dror, but any one can edit almost anything, anytime. Some advice can be found at how you can contribute.

A knot diagram gives a map on the plane, where there are four edges coming together at each vertex. Actually, it is better to think of the diagram as a map on the sphere, with a polygon on the outside.

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Sandpipers and Allies (Order: Charadriiformes, Family: Scolopacidae) <p>Red Knots are plump, neatly proportioned sandpipers that in summer sport brilliant terracotta-orange underparts and intricate gold, buff, rufous, and black upperparts.

Including the outside region we have a map on the sphere. That we call a knot map. We’ll use the V, E, F notation for the numbers of vertices, edges and faces. Example 6: The trefoil knot map has V = 3 (ie 3 crossings) E = 6 F = 5 (including the outside). Note the distinction between a knot and a knot map.

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Computes fine-grained spatio-temporal coverage statistics for each road segment in the considered map, starting from a set of map-matched trajectories. The node takes as input a …