CULTURAL FEATURES.

The cultural features represented on a map include "the works of man"—not only cities, towns, buildings, bridges, railroads, and other roads, but State, county, and other boundary lines—in short, all that part of a three-color base map which is shown in black, the engraved plate for the black being called the culture plate. The features named in the list below are the cultural features referred to. (See [Pl. IV] for corresponding symbols.)

Aqueduct mains.
Aqueduct tunnels.
Bench marks.
Boundary Lines.
Boundary monuments.
Breakwaters.
Bridges.
Buildings.
Cable Lines.
Camps.
Canal locks.
Canals.
Cemeteries.
Churches.
Cities.
County lines.
Dams.
District lines.
Ditches.
Electric power lines.
Fences.
Ferries.
Fords.
Gas wells.
Hedges.		Hospitals.
Jetties.
Land-grant lines.
Land-section Lines.
Levees.
Mains.
Mineral monuments.
Mine tunnels.
Mines.
National forests.
National parks.
Oil tanks.
Oil wells.
Open cuts.
Park boundaries.
Paths.
Pits.
Post offices.
Precinct lines.
Prospects.
Province lines.
Quarries.
Quarter-section lines.
Railroads, steam or electric.		Ranches.
Reservation boundaries.
Reservoirs.
Roads.
Ruins.
Schoolhouses.
Section comers.
Section Lines.
Settlements.
Shafts.
Streets.
Telegraph Lines.
Towns.
Township comers.
Townships.
Trails.
Tramways.
Triangulation stations.
Tunnels.
Villages.
Water mains.
Water wells.
Waterworks.
Windmills.

LETTERING.

GENERAL DIRECTIONS.

The cultural features are named on maps by letters of two distinct styles—slanting gothic for public works and roman for habitations and civil divisions. The size of the letters used should indicate in a general way the relative importance of the feature or group to which they are applied, but on some maps the county seats, State capitals, and large cities may be distinguished by different symbols. The names of civil divisions are lettered in sizes depending on their relative grade and the size of the area or space in which the names are to appear.

The features shown on a topographic map may be broadly separated into four groups and are lettered as follows:

Civil divisions (countries, States, counties, townships, land grants, reservations, cities, towns, villages, settlements, schools, lodges, ranches, etc.), roman capitals or capitals and lower case.

Public works (railroads, tunnels, roads, canals, ferries, bridges, fords, dams, mains, mines, forts, trails, etc.), slanting gothic capitals (light) or capitals and lower case.