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import geoviews as gv
from geoviews import opts, tile_sources as gvts
gv.extension('matplotlib')
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opts.defaults(
opts.Layout(sublabel_format='', vspace=0.1, hspace=0.1, fig_size=200),
opts.WMTS(zoom=0))
(gvts.Wikipedia + gvts.StamenToner + gvts.EsriNatGeo + gvts.EsriImagery +
gvts.EsriUSATopo + gvts.EsriTerrain + gvts.EsriReference + gvts.StamenTerrain).cols(4)