USGS (United States Geological Survey)

Patrick McGee

Gouache, watercolor, pigmented acid free ink on Arches watercolor paper

 all images 10"x14" unless noted

BUILDINGS AND RELATED FEATURES m
Built-up area
Airport, paved landing strip, runway, taxiway, or apron

12"x16"
Well (other than water), Windmill or wind generator

9"x12"
COASTAL FEATURES m
Foreshore flat (1)
Foreshore flat (2)
Coral or rock reef (1)
Coral or rock reef (2)
Coral or rock reef (3)
Rock, bare or awash; dangerous to navigation
Group of rocks, bare or awash
Exposed wreck
Depth curve; sounding
Breakwater, pier, jetty, or wharf
Seawall           
Oil or gas well; platform

CONTOURS topographic

 m
Index: Approximate or indefinite
Depression

CONTROL DATA AND MONUMENTS

Boundary monument

 m
Third-order or better elevation, recoverable mark, no tablet

9"x12"
GLACIERS AND PERMANENT

SNOWFIELDS

 m
Glacial advance
Glacial retreat

LAND SURVEYS

Public land survey system

 m
Range or Township line: Location doubtful

9"x12"
Witness corner
Meander corner
Weak corner
MINES AND CAVES m
Mine dump (1)
Former disposal site or mine
PROJECTION AND GRIDS m
Graticule tick

9"x12"

RAILROADS AND RELATED

FEATURES

 m
Railroad siding
Railroad underpass; overpass
Railroad bridge; drawbridge

12"x16"
Railroad yard

12"x16"
Railroad turntable; roundhouse
RIVERS, LAKES, AND CANALS m
Intermittent river (1)
Disappearing stream   
Falls, large
Perennial lake/pond
Intermittent lake/pond (1)
Dry lake/pond (2)
Wide wash (1)
Water well, geyser, fumarole, or mud pot

9"x12"
ROADS AND RELATED FEATURES m
Light duty road
Highway or road underpass; overpass

12"x16"
Highway or road bridge; drawbridge

12"x16"

SUBMERGED AREA AND BOGS

 m
Marsh or swamp
Submerged marsh or swamp
Wooded marsh or swamp
Submerged wooded marsh or swamp
SURFACE FEATURES m
Disturbed surface (1)
Disturbed surface (2)
VEGATATION m
Woodland
Shrubland
Orchard                       
Vineyard
Mangrove (1)
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