GE Cartography Practice Test 2026 – Comprehensive Exam Prep

Two perpendicular, regularly spaced line sets form a grid, which gives the map a simple coordinate reference system. This grid creates a regular network of lines that you can use to locate points by where the lines cross from each direction. Isopleths are contour lines that connect points of equal value, so they describe elevation or other quantities rather than a regular crosshatch reference system. Focal length is a camera or lens term and doesn’t describe map line patterns. A symbol is just a graphical representation for features, not the network of lines itself.