EvoLaps is a user-friendly web application designed to visualize the spatial and temporal spread of pathogens. It takes an annotated tree as input, such as a maximum clade credibility tree (MCCT) obtained through phylogeographic inference. By following a top-down reading of the tree, geographic transitions from a node to its childrens are represented on a cartographic background using graphical paths. The complete set of paths forms the phylogeographic scenario. A raw reading of these transitions can produce complex scenarios. EvoLaps helps analyze them with:

• support for both discrete (e.g. country) or continuous model (latitude/longitude) phylogeographic analyses
• 2d/3d visualization of scenarios with multiple layouts and extensive style customization,
• multiple graphical variables with time/distance/speed-dependent gradients for enhanced path display
• cross-highlighting and selection between the phylogenetic tree and the phylogeographic scenario
• animation of the phylogeographic scenario using phylogenetic tree brushing
• customizable geographic map with support for environmental data layers
• clustering of localities into spatial regions to generate synthetic views
• interactive phylogenetic tree editing
• methodological insights (clustering, inference of ancestral character states, phylodynamic, etc.)