Cartographic Principles: Map Generalization and Scale Calculation
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Understanding Map Generalization
What is Cartographic Generalization?
Reality has far too much information to be conveyed on a single two-dimensional map. Map generalization is the process of selecting and simplifying map features appropriate to the map's scale and purpose.
Key Techniques in Map Generalization
- Selection: Choosing only relevant line, point, and area features to be mapped. This decision is based on the map's intended use.
- Simplification: Reduction of unnecessary detail, often involving reducing the number of vertices (corners) in a polygon shape or line.
- Smoothing: Similar to simplification, this technique smooths out abruptly joined lines, improving aesthetic quality.
- Displacement: Shifting overlapping features slightly so that all