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EvoLaps is a user-friendly web application designed to visualize the spatial and temporal spread of pathogens. It takes an annotated tree as entry, such as a maximum clade credibility tree obtained through continuous phylogeographic inference. By following a 'Top-Down' reading of a tree recursively, transitions (latitude/longitude changes from a node to its children) are represented on a cartographic background using graphical paths. The complete set of paths forms the phylogeographic scenario. A raw reading of these transitions produces complex scenarios. EvoLaps helps to analyze them with:

    multiple graphical variables with time-dependent gradients
    for enhanced paths display,
    cross-highlighting and selection
    between the phylogeographic scenario and the phylogenetic tree,
    of localities into spatial clusters for the production of specific spatio-temporal scales and synthetic views,
    phylogenetic tree brushing to animate the phylogeographic scenario,
    additional geographic layers, computation of ancestral character states from discrete variables,
    diverse and evolving library of visualization and processing tools.

Contact: francois.chevenet@ird.fr