topographic maps. topo maps ► topographic maps : show elevation of the land using contour lines. ...
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Topographic MapsTopographic Maps
Topo MapsTopo Maps
►Topographic maps :Topographic maps :
show elevation of the land using contour show elevation of the land using contour lines.lines.
takes 3D landscapes and represents them takes 3D landscapes and represents them in a 2D fashion. in a 2D fashion.
have a variety of uses, from planning the have a variety of uses, from planning the best route for a hike to determining a best route for a hike to determining a location for a school or an airport.location for a school or an airport.
Parts of a Topo MapParts of a Topo Map
►Name of the MapName of the Map►Direction Direction ►Latitude and Longitude Latitude and Longitude ►ScaleScale► Contour Lines Contour Lines ►Contour Interval Contour Interval
Name of the MapName of the Map
►Located at the top Located at the top
right of the map.right of the map.
DirectionDirection
►Look for the north arrow.Look for the north arrow.►N E W SN E W S
Latitude and LongitudeLatitude and Longitude
►Located on the edges Located on the edges
of the map.of the map.
ScaleScale
►A representative A representative
distance on the earth’s distance on the earth’s
surface.surface.
Contour LinesContour Lines
►Lines of equal elevationLines of equal elevation►THEY NEVER CROSSTHEY NEVER CROSS►Close = steep surface.Close = steep surface.
►Spread apart = gentle surfaceSpread apart = gentle surface
Contour IntervalContour Interval
►The change in elevation from contour The change in elevation from contour line to another contour line. line to another contour line.
Earth Science NotesEarth Science Notes
► A. Topographic MapsA. Topographic Maps Shows the elevation of the land y using contour Shows the elevation of the land y using contour
lines, and shows other natural and man-made lines, and shows other natural and man-made features. Sfeatures. S
► B. Contour lineB. Contour line Lines of equal elevation.Lines of equal elevation.
► Elevation – distance above sea level.Elevation – distance above sea level.► Contour Interval - The change in elevation Contour Interval - The change in elevation
from contour line to another contour line. from contour line to another contour line. ► Index Contour Line – Thick contour line that Index Contour Line – Thick contour line that
gives elevation.gives elevation.
Earth Science NotesEarth Science Notes
► DepressionDepression► Bench Mark – A point of known elevation from Bench Mark – A point of known elevation from
which all other points are measured.which all other points are measured.► Spot elevationSpot elevation► 1. contour interval1. contour interval► 2. depression2. depression► 3. index contour interval3. index contour interval► 4. 20 ft4. 20 ft► 5. 259 ft5. 259 ft► 6.east6.east► 7.closer together7.closer together► 8.8.