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import geoviews as gv
from geoviews import opts, tile_sources as gvts
gv.extension('bokeh')
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opts.defaults(
opts.WMTS(width=200, height=200, xaxis=None, yaxis=None, level='annotation'))
(gvts.OSM + gvts.Wikipedia + gvts.StamenToner + gvts.EsriNatGeo +
gvts.EsriImagery + gvts.EsriUSATopo + gvts.EsriTerrain + gvts.EsriReference).cols(4)