Washington State (USGS)

Artist

Unknown

Creation Date

Unknown. Pre-1980 Mount St. Helens eruption.

Scale and Size

Original art scale: 1:1,500,000
Original art size: Unknown
Cropped digital art size: 64.22 × 42.13 cm at 300 DPI,
7,585 × 4,976 pixels

Terms of Use

No use restrictions. The shaded relief is in the public domain.

Georeferencing

Albers Equal-Area Conic Projection
Central Meridian: 120.1W
1st Standard Parallel: 23.5N
2nd Standard Parallel: 45.5N
Origin Latitude: 23N
NAD83 Datum

Map Compatibility

Relief modified May 18, 2020, by Tom Patterson to fit 1:1 million USGS National Atlas drainages in the projection noted above by warping it in Photoshop. The post-eruption Mount St. Helens summit rendered
from digital data was also added.

Release Date

May 2020

Additional Information

Relief obtained from Raven Maps, Medford, Oregon, as an 8” x 10” continuous-tone negative. The USGS produced the relief for a 1:1.5 million base map of Washington state.