: Integration of USGS Historical Topographic Map Collection, LiDAR digital elevation models, and municipal drainage records.
: A mobile-integrated view that allows users to point their phone at a dry valley or street corner to see a 3D simulation of the original water flow. Old Stream Map v 1.2
: A "Citizen Historian" tool where users can upload scanned family maps or local archives to improve the accuracy of the stream paths. Technical Implementation : Integration of USGS Historical Topographic Map Collection,
: Uses LiDAR (Light Detection and Ranging) data to highlight depressions in the earth where streams once existed, even if they are now paved over or dry. LiDAR digital elevation models