Noun
basemap (plural basemaps)
(cartography, GIS) The map used as the basic map. Other data may be overlaid upon a basemap: for example, an aerial imagery basemap on which is overlaid property lines.
A dark imagery basemap provides an ideal backdrop for striking bright green view lines. Source: Internet
I am trying to get the current basemap after user selection, in the sandbox provided by ArcGIS, sandbox link. Source: Internet