1. Map Making

2. First decision—What so you want to show?
Thematic maps
Center of map
First decision—What so you want to show?

3. #2 What KIND of map to use? Choropleth Proportional symbol Isoline
Dot map
#2 What KIND of map to use?

4. Chloropleth map

5. Proportional symbol map

6. Isoline map

7. Dot map

8. #3 What SCALE to use? Distortion of map increases as scale decreases
As scale changes, level of aggregation changes
#3 What SCALE to use?

9. Representative Fraction
1/50,000
1:50,000
Representative Fraction

10. Verbal Scale “one centimeter to one kilometer”
1 cm=1 km, so 1 cm=1000 m, so 1 cm=100,000 cm
Verbal Scale

11. Graphic Scale

12. #4 What projection to use?
Distortion of direction
Distortion of distance
Distortion of shape
Meridians (longitude, latitude)
Shapes (cylinder, tetrahedron, etc)
More next class
#4 What projection to use?