Social Sciences, asked by jitu00657, 8 months ago

why are various symbols used in the map​

Answers

Answered by Anonymous
1

Since a map is a reduced representation of the real world, map symbols are used to represent real objects. Without symbols, we wouldn't have maps. Both shapes and colors can be used for symbols on maps. ... To ensure that a person can correctly read a map, a Map Legend is a key to all the symbols used on a map.

Answered by rithisoman
0

Answer:

Explanation:

Since a map is a reduced representation of the real world, map symbols are used to represent real objects. Without symbols, we wouldn't have maps.

Both shapes and colors can be used for symbols on maps. A small circle may mean a point of interest, with a brown circle meaning recreation, red circle meaning services, and green circle meaning rest stop. Colors may cover larger areas of a map, such as green representing forested land and blue representing waterways.

To ensure that a person can correctly read a map, a Map Legend is a key to all the symbols used on a map. It is like a dictionary so you can understand the meaning of what the map represents.

Here are some common symbols:

 

TOPOGRAPHIC CONTOURS  (land elevation)

Index

number written on line map symbol key

Intermediate

between Index lines topographic map symbol

Supplementary

added to flat areas to show measurements legend map symbol

Depression

such as volcano top or crater

(little dashes are called hachures) map symbol

Cut; Fill

roadway leveling terrain  

 

VEGETATION

Woodland

trees at least 6feet tall  

Scrub

low brush  

Orchard

planted vegetation  

Vineyard

cultivated vines  

Mangrove

dense, tropical trees  

 

SURFACE FEATURES

Levee  

Sand or mud area, dunes or shifting sand  

Intricate surface area  

Gravel beach or glacial moraine  

Tailings pond  

 

MINES AND CAVES

Quarry 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 SNOWFIELDS

Limit

blue denotes coverage  

Form lines

Show shape, not elevation  

 

BUILDINGS AND RELATED FEATURES

Building  

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 FEATURES

Primary 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 FEATURES

Standard 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 PIPELINES

Power transmission line: pole; tower  

Telephone line  

Aboveground oil or gas pipeline  

Underground oil or gas pipeline  

 

BOUNDARIES

National  

State or territorial  

County  

Civil township  

Incorporated city  

Park, reservation, or monument  

Small Park  

 

LAND SURVEY SYSTEMS

U.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 MONUMENTS

Horizontal 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 CANALS

Intermittent 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 BOGS

Marsh or swamp  

Submerged marsh or swamp  

Wooded marsh or swamp  

Submerged wooded marsh or swamp  

Rice field  

Land subject to inundation  

 

MARINE SHORELINE

Approximate 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 CONTOURS

Index  

Intermediate  

Supplementary

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