Weighted Spatial Tessellations in Constrained Polygon Domains // Provides tools for weighted spatial tessellation using Euclidean and geodesic distances within constrained polygonal domains. The package can generate complete and connected spatial partitions that respect complex boundaries, heterogeneous point weights, and optional resistance or terrain effects. The methods extend weighted Voronoi tessellations to constrained domains and graph-based cost-distance surfaces. For background see Aurenhammer (1991) doi:10.1145/116873.116880 and van Etten (2017) doi:10.18637/jss.v076.i13.