Open map List

Merge

In cartography, merge is a generalization operator used to simplify a map by combining multiple smaller geographic features into a single, larger feature. This process is commonly applied to improve readability and reduce data complexity at smaller map scales.

Basic

Introduction

Key Characteristics of the Merge Operator:

  1. Combines Similar Features – Groups adjacent or similar objects into one entity.
  2. Used for Scale Reduction – Simplifies maps when zooming out or representing large areas.
  3. Maintains Topological Integrity – Ensures that boundaries and spatial relationships remain consistent.
  4. Removes Unnecessary Detail – Reduces visual clutter while retaining essential information.

Examples

Examples of Merge in Cartography:

  • Land Use Aggregation: Small forest patches are merged into a larger forest area.
  • Administrative Boundaries: Minor subdivisions (e.g., small towns) are merged into larger administrative regions (e.g., provinces).
  • Water Bodies: Multiple small lakes are merged into a generalized water area at a lower map resolution.
  • Road Networks: Minor streets may be merged into larger road classes on small-scale maps.

Outgoing relations