Welcome to the 2026 GIS in Action Annual Conference hosted by the Oregon & SW Washington Chapter of the Geospatial Professional Network & Cascadia ASPRS.
This lightning talk presents a chronological map series documenting the spatial evolution of Oregon’s administrative boundaries. Starting from the original provisional districts of the 1840s to the final 36-county layout established in the early 1900s, this project visualizes the settlement and development of Oregon over time. By mapping the shifting lines and the relocation of county seats, this gallery entry provides a clear, spatial record of how the state’s political geography was carved out of the Pacific Northwest. It is accompanied by a web application which presents the same information in an interactive format.
