Map Projection - Quick Revision Sheet
Quick revision
Key terms
| Term | Meaning |
|---|---|
| Graticule | Network of latitudes and longitudes on a flat sheet |
| Homolographic | Equal area projection |
| Orthomorphic | True shape projection |
| Equidistant | True scale projection |
| Secant cone | Cuts the earth at two standard parallels |
Surface and region
| Surface | Suited to |
|---|---|
| Cylinder | Equatorial regions |
| Cone | Middle latitudes |
| Plane (zenithal) | Polar areas |
Light source
| Projection | Light |
|---|---|
| Gnomonic | Centre of globe |
| Stereographic | Periphery, opposite the point of contact |
| Orthographic | Infinity |
Names and dates
- Cylindrical Equal Area: J.H. Lambert, 1772
- Cylindrical Equi-distant: Marinus of Tyre, about C.E. 100
- Polar Zenithal Equal Area: Lambert's Equal Area projection
Division rules
- Meridians on the equator line: 360 divided by the interval (30 degrees gives 12)
- Parallels on a cylindrical meridian: 180 divided by the interval (30 degrees gives 6)
- Concentric circles in a polar zenithal projection: 90 divided by the interval (30 degrees gives 3)
More for this chapter
Additional MCQs29 extra MCQs · solved
Practice TestInteractive · instant score
Study NotesConcepts & methods
More chapters in Geography
View all
1 Population Geography
2 Human Settlements
3 Resources
4 Economic Activities
5 Cultural and Political Geography
6 Geoinformatics
7 Sustainable Development
8 Man-Made Disasters - Public Awareness for Disaster Risk Reduction
9 Surveying
11 Thematic Mapping
12 Representation of Geographical Data
13 Statistical Techniques