.. This document is auto-generated by the altair-gallery extension. Do not modify directly.

.. _gallery_world_projections:


World Projections
-----------------
This example shows a map of the countries of the world using four available
geographic projections. For more details on the projections available in
Altair, see https://vega.github.io/vega-lite/docs/projection.html


.. altair-plot::
    :code-below:

    
    import altair as alt
    from vega_datasets import data

    source = alt.topo_feature(data.world_110m.url, 'countries')

    base = alt.Chart(source).mark_geoshape(
        fill='#666666',
        stroke='white'
    ).properties(
        width=300,
        height=180
    )

    projections = ['equirectangular', 'mercator', 'orthographic', 'gnomonic']
    charts = [base.project(proj).properties(title=proj)
              for proj in projections]

    alt.concat(*charts, columns=2)


.. toctree::
   :hidden: