What does 'layering' mean in the context of GIS?

In the context of GIS, 'layering' refers to the practice of stacking multiple data layers to analyze relationships between various geographic and spatial data sets. By overlaying different layers, such as demographic data, land use, transportation networks, and environmental features, GIS analysts can evaluate how these elements interact with one another. This capability allows for more comprehensive analyses to uncover patterns, make informed decisions, and visualize complex relationships in both physical and socio-economic contexts.

Layering is fundamental to GIS because it enables users to view data in a multi-dimensional way, facilitating insights that are not readily apparent when individual datasets are examined in isolation. The integration of multiple layers can highlight trends, spatial correlations, and potential impacts, enhancing the overall utility of the GIS system.

The concept of layering in this context is crucial for tasks such as urban planning, resource management, and environmental assessments, where understanding the relationships between different factors is essential for effective decision-making.