Old Stream — Map V 1.2

: Integration of USGS Historical Topographic Map Collection, LiDAR digital elevation models, and municipal drainage records.

: Push notifications when a user enters a zone that was historically a flood plain or significant waterway, providing context on local soil moisture and historical flood risks. Old Stream Map v 1.2

: 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. : 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. : Uses LiDAR (Light Detection and Ranging) data

: Vector-based tiles for smooth zooming, with a "water-ink" aesthetic for the historical layers to distinguish them from modern blue-line maps.

: A granular slider that transitions the map view from current satellite imagery to 19th-century hydrographic surveys and geological "best-guess" paleo-channels.