TOPOGRAPHIC CONTOURS(land elevation) Index
number written on line Intermediate
between Index lines Supplementary
added to flat areas to show measurements Depression
such as volcano top or crater
(little dashes are called hachures) Cut; Fill
roadway leveling terrain
VEGETATIONWoodland
trees at least 6feet tall Scrub
low brush Orchard
planted vegetation Vineyard
cultivated vines Mangrove
dense, tropical trees
SURFACE FEATURESLevee Sand or mud area, dunes or shifting sand Intricate surface area Gravel beach or glacial moraine Tailings pond
MINES AND CAVESQuarry or open pit mine Gravel, sand, clay, or borrow pit Mine tunnel or cave entrance Prospect; mine shaft Mine dump Mine tailings
GLACIERS AND PERMANENT SNOWFIELDSLimit
blue denotes coverage Form lines
Show shape, not elevation
BUILDINGS AND RELATED FEATURESBuilding School; church Built-up Area Racetrack Airport Landing strip Well (other than water); windmill Tanks Covered reservoir Gaging station Landmark object (feature as labeled) Campground; picnic area Cemetery: small; large
ROADS AND RELATED FEATURESPrimary highway Secondary highway Light duty road Unimproved road Trail Dual highway Dual highway with median strip Road under construction Underpass; overpass Bridge Drawbridge Tunnel
RAILROADS AND RELATED FEATURESStandard gauge single track; station Standard gauge multiple track Abandoned Under construction Narrow gauge single track Narrow gauge multiple track Railroad in street Juxtaposition Roundhouse and turntable
TRANSMISSION LINES AND PIPELINESPower transmission line: pole; tower Telephone line Aboveground oil or gas pipeline Underground oil or gas pipeline
BOUNDARIESNational State or territorial County Civil township Incorporated city Park, reservation, or monument Small Park
LAND SURVEY SYSTEMSU.S. Public Land Survey System Township or range line Section Line Found section corner; found closing corner Witness corner; meander corner Other land surveys Township or range line Section line Land grant or mining claim; monument Fence line
CONTROL DATA AND MONUMENTSHorizontal control Third order or better, permanent mark With third order or better elevation Check spot elevation Coincident with section corner Unmonumented* Vertical control Third order or better, with tablet Third order or better, recoverable mark Bench mark found at section corner Spot elevation Boundary monument With tablet Without tablet With number and elevation U.S. mineral or location monument
RIVERS, LAKES, AND CANALSIntermittent stream Intermittent river Disappearing stream Perennial stream Perennial river Small falls; small rapids Large falls; large rapids Masonry dam Dam with rock Dam carrying road Perennial lake; Intermittent lake or pond Dry lake Narrow wash Wide wash Canal, flume, or aquaduct with lock Elevated aquaduct, flume or conduit Aquaduct tunnel Well or spring; spring or seep
SUBMERGED AREAS AND BOGSMarsh or swamp Submerged marsh or swamp Wooded marsh or swamp Submerged wooded marsh or swamp Rice field Land subject to inundation
MARINE SHORELINEApproximate mean high water Indefinite or unsurveyed
BATHYMETRIC FEATURES(water depth) Area exposed at mean low tide; sounding datum Channel Offshore oil or gas: well; platform Sunken rock
BATHYMETRIC CONTOURSIndex Intermediate Supplementary