Current host configuration revision; must equal the captured token's value.
OptionaldefinitionsAdditional definitions used by core when converting snapshot/point CRS to the working CRS.
OptionalmaxMaximum proposed, spatially distributed points; default 16, further capped by free core slots.
OptionalmodePreserve manual points with merge (default); use replace only after explicit user choice.
OptionalmodelFit model after application. keep retains the document's model; candidate
switches to the matched model (similarity, affine or projective). Defaults to
keep when merging into existing points, so a manual fit such as a thin-plate
spline is never silently replaced, and to candidate otherwise.
OptionalpixelOptional exact nonlinear mapping from reference pixel edges to snapshot.crs.
Defaults to the snapshot's matrix. This host callback is never sent to workers;
use the same mapping when drawing candidate footprints in your application.
Explicit application policy and coordinate conversion supplied by the host.