LineageMap

LineageMap is a web app (with optional mobile companion) for researchers and teams who need to know exactly how administrative boundaries and regions changed over time—and to prove it. It lets users view, compare, and export boundary versions (e.g., counties, districts, municipalities) with a clear timeline, source citations, and change logs. Instead of relying on messy PDFs, outdated shapefiles, or conflicting Wikipedia-style summaries, users can upload boundary datasets, attach authoritativ ...