Sun shading (lidar)

Adjust simulated sun direction on the lidar hillshade. Azimuth = compass bearing of the light (0° north, 90° east). Altitude = height above the horizon (low = long shadows).

Historical map overlays

USGS scanned historical topographic maps. Enable an overlay and adjust its opacity. Works in 2D and 3D.

Sun azimuth: 315°   Sun altitude: 45°   Z factor: 1   Lidar opacity: 1
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British Battleship Augusta Delaware River Treasure

Lost Treasure PA • Philadelphia County County
Description
Philadelphia legend that the British battleship Augusta sank in the Delaware River with a large treasure aboard — a Revolutionary-era river wreck hoard below the city.
Historical Notes
The Augusta was a British warship active in the Delaware River during the Revolutionary War. Compiled Pennsylvania guides say the vessel went down with substantial valuables that were never salvaged. The wreck tradition anchors Philadelphia County to Delaware Bay and river shipwreck lore along the colonial waterfront.
Status / Verification legend — Legendary or approximate

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