Enum BasemapKind
Selects the basemap drawn beneath the chart data in the headless render path (issue #411). Kept renderer-agnostic in the core so every layer — the scene IR, the Skia renderers, the dataset pipelines, the facade, and the CLI — can name the same option without a backend dependency.
public enum BasemapKind
Fields
None = 0No basemap. The output is byte-for-byte identical to the pre-#411 behaviour: only the chart data is drawn over the background fill.
Offline = 1Bundled offline basemap: Natural Earth 1:10m land polygons (public domain) filled with a muted parchment tone, drawn beneath all chart layers and projected with the chart's own Web-Mercator viewport so it registers exactly. Requires no network access.
Remarks
Online raster-tile basemaps (available in the interactive viewer) are intentionally absent: they require network access and are out of scope for the offline, Mapsui-free headless path.