pg 57
Latitude and Longitude I
Latitude
- measured NORTH and SOUTH from the Equator
- Latitude is based on the
Latitude = Altitude
Longitude
- measured EAST and WEST from the
Prime Meridian
- is based on Earth's Rotation
360 / 24 hrs = 15 /hr
*the basis for time zones
same longitude = same local time
coordinates
- always listed: latitude, longitude
** don't forget units & compass direction**
- All locations in the USA have a NORTH
latitude and WEST longitude**
Same longitude = same local time
pg 59
Topographic Map Basics
purpose:
- to show the elevation of every point on the map
when:
- hiking, biking, building a house, landscaping
1. All points on the same contour line are the same
elevation
2. Contour lines eventually connect with themselves
3. Contour lines NEVER split or branch
4. Contour lines NEVER cross each other
Special Contour Lines
pg 61
Stream Flow - contour lines form a "V" and point uphill (upstream)
when they cross a river or stream
**rivers and streams flow downhill
Hachured lines
- show areas of depression
(decreasing elevation)
- the first hachured line has the same elevation
as the previous contour line
pg 63
steps to
drawing a
profile
Profiles
1. place a piece of paper between the points
2. mark where every contour line touches the edge
of the paper
3. determine the elevation of each mark and mark
it on the paper
4. place the paper on the graph and mark the
elevations of each contour line
5. connect the points with a smooth line
Gradient
pg 65
gradient
change in field value (elevation)
distance
*how steep or gentle a slope
contour lines =
steep
gentle
E: gradient = change in elevation
distance
S: g = 1632 ft- 282 ft
120 mi
A: g = 1350 ft = 11.25 ft/mi
120 mi
pg 67
Mapping Review
pg 69
Unit Test