Maps and Mapping. Determining Location. Latitude Lines that run horizontally Measured in degrees North and South of the Equator. Longitude Lines that run vertically Measured in degrees East or West of the prime meridian. II. Mercator Projection Map. Gerardus Mercator
a. Contour lines- a line that shows elevation
* contour interval- tells the difference in elevation between 2 contour lines
*contour lines forming a circle represent a hill.
1. lines close together- steep slope
2. lines further apart – gentle slope
3. depression-represented by circular contours that have hachure marks