Mapping/Minerals/metamorphic
Review
• Scale relates to actual distance.
• Topographic maps and satellite imagery are twodimensional models that provide information
defining three-dimensional landforms. They
contain extensive information related to
geographic as well as human structures and
changes to the land surface, and are useful in
understanding geologic processes.
• Grid systems of latitude and longitude are used to
define locations and directions on maps, globes,
and charts.
• interpret landforms, water features, map scale,
horizontal distance between points, elevation and
elevation changes, latitude and longitude, humanmade structures and other pertinent features on 7.5
minute quadrangles on topographic maps.
• construct profiles from topographic contours.
• use latitude and longitude down to minutes, with
correct north-south and east-west designations, to
locate points on a map.
Scale
Satellite
Imagery
Topographical Maps
General Rules for Contour Lines
1.
Contour lines connect points of equal elevation; therefore every point along a contour
line is the exact same elevation.
2.
Contour lines never intersect. (A point on the surface of the earth cannot be at two
different elevations).
3.
Contour lines never split or divide.
4.
Contour lines always separate points of higher elevation (uphill) from lower elevation
(downhill).
5.
Contour lines always close to form an
irregular circle. Note that sometimes
contour lines extend beyond the area on
a map so you may not see the entire
Click the map to see the extended
closed circle.
contour lines.
6.
The closer spaced the contour lines are
to one another, the steeper the slope.
[Show me]
7.
A hill is represented by a concentric
series of closed contours.
8 Depression contours are indicated by
. hachure marks on the downhill side.
9.
Contour lines “V” upstream when crossing
a stream. The point of the “V” points
uphill.
Mapping
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Latitude lines go from east to west.
Equator is 0° Latitude
Longitude lines for from north to south
Prime Meridian is 0° longitude and runs
through Greenwich England
The International Date Line is the 180°
longitude
Topographic Maps
• Contour lines show elevation of land
• Contour index are the dark lines that tell
elevation
• The closer the contour lines are the steeper
the land
• Depressions use hachure lines that point to
the lowers point
Symbols
Bathymetric Maps
• Maps that show the
depth of the water
using contour lines
One Down
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Astronomy
Meteorology
Lots of geology
And oceanography left………
Are you ready????????????????????????