一堆有關 OpenStreetMap 架構和美國舊地圖等連結

OpenStreetMap - Component overview
OpenStreetMap - Platform Status
OpenStreetMap - Servers
OpenStreetMap - Develop
USGS Historical Topographic Map Explorer
Getting Started with Spatial Statistics

內部連結：
【目錄】地理／地理資訊系統／空間資料庫／大地測量內部連結

本文連結