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Unit 2 Contour Mapping

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Road map, weather map, trail map, subway map, political map, ... Mercator Projection. Straight longitude and latitude lines that intersect at right angles. ... – PowerPoint PPT presentation

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Title: Unit 2 Contour Mapping


1
Unit 2 Contour Mapping
2
  • What kind of maps do you know?
  • Road map, weather map, trail map, subway map,
    political map, topographic map, building maps

3
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4
  • What words are associated with maps?
  • Latitude, Longitude, Key/Legend, Grid, Mileage
    scale

5
  • What is the biggest problem in making a map of
    the world on a piece of paper?
  • Earth is round paper is not

6
  • Who makes maps?
  • Cartographers

7
Mapping Information
  • North is usually at the top of the map
  • Location descriptions
  • Relative NJ is east of PA
  • Absolute grid coordinates latitude/longitude

8
  • Equator imaginary line that circles the Earth
    in between North and South poles runs East to
    West
  • Prime Meridian imaginary line through the old
    Royal Astronomical Observatory in Greenwich,
    England runs North to South

9
  • Latitude distance in degrees North or South of
    the Equator also known as parallels
  • Longitude distance in degrees East or West of
    the Prime Meridian also known as meridians

10
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11
  • Time Zones are determined by the meridians or
    longitude lines on a map
  • Every 15 from the prime meridian in Greenwich,
    England 24 time zones
  • If you travel West of England, you subtract an
    hour traveling East, you add an hour

12
Time zones
13
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14
Map Projections
  • Map projection is made when points and lines on a
    globes surface are transferred onto paper
  • Different projections create different
    distortions depending on purpose

15
Mercator Projection
  • Straight longitude and latitude lines that
    intersect at right angles.
  • Scale is true at the equator or at two standard
    latitude lines of equal distances from the
    equator.
  • Areas near poles are distorted.

16
Robinson Projection
  • Latitude lines are parallel, but longitude lines
    curve into poles.
  • Some distortion of area, shape
  • Used to show visually appealing pictures of the
    whole world

17
Conic Projection
  • Lines of latitude and longitude intersect at
    right angles
  • Meridians are straight and parallels are arcs
  • Accurate for small areas road maps, weather maps

18
Mileage Scale
  • Map scale is the relationship between the
    distances on the map and actual distances on
    Earths surface.
  • Bar scale -
  • Verbal scale one inch 100 miles
  • Ratio scale 1100

19
  • "On this map there's a bar scale! All you have to
    do is take a piece of paper, mark off miles from
    the bar scale onto the edge of the paper, and
    then hold the edge of the paper so that it lies
    along Bo Ring Way

20
  • One inch four miles. First, place a ruler
    marked in inches on the map and measure how many
    inches separate the two towns on the map! The two
    towns are about 2.5 inches apart!
  • 2.5 inches times 4 miles per inch 10 miles
    apart on the ground!"

21
  • "That's more difficult because the road is
    curved! You need some way to estimate distance
    along the curves of Dingle Way from Louberg to
    Luluville. you can use a piece of string! Take
    the string and lay it out along the route. Then,
    straighten the string out and hold it against the
    bar scale or a ruler!

22
Driving Distances
23
Topographic maps
  • Topo means shape
  • Topographic maps show the shape and height of the
    land on a flat piece of paper
  • Elevation is the distance of a location above or
    below sea level

24
  • Contour lines connect points on the map that have
    the same elevation
  • Index contours are contour lines with elevation
    numbers

25
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26
High Point High School
27
Contour Mapping Rules
  • 1. Hills and depressions are represented by
    circles. Hachure Lines are used to show
    depressions.
  • Hill Depression

28
Contour Mapping Rules
  • 2. Contour lines never cross.

29
Contour Mapping Rules
  • 3. When contour lines meet a river or a stream
    they form a V the points upstream.

30
Map Symbols
31
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34
Mapping Quiz Topics
  • Equator and Prime Meridian
  • Latitude vs Longitude
  • Three map projections
  • What is a topographic map?
  • Topographic Terms
  • Topographic Rules (3)
  • Map symbols

35
Mapping Activity 2
36
Mapping Activity 2
37
Mapping Activity 3
38
Mapping Activity 3
39
The Average Slope
  • Slope the amount of deviation from the
    horizontal
  • Ex hillside skiing

Bunny hill
Intermediate
Professional
40
In math class, you learn slope as
  • Slope rise
  • run
  • Slope y2 y1
  • x2 x1

41
  • Slope y2 y1
  • x2 x1
  • 3 0
  • 6 0
  • 0.5

42
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43
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44
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47
Websites
  • http//nationalatlas.gov/articles/mapping/a_latlon
    g.html
  • http//plasma.nationalgeographic.com/mapmachine/
  • http//www.nationalgeographic.com/xpeditions/lesso
    ns/01/g68/mapmaking.html
  • http//members.shaw.ca/hollylloyd/theme/mappingski
    lls.htm
  • http//interactive2.usgs.gov/learningweb/teachers/
    exploremaps.htm
  • http//www.colorado.edu/geography/gcraft/notes/map
    proj/mapproj_f.html

48
Topographic websites
  • http//www.compassdude.com/topographic-maps.shtml
  • http//members.aol.com/bowermanb/maps.htmltopo
  • http//www.topozone.com/states/NewJersey.asp
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