​Which one of the following is an advantage of the vector data model?

Correct option is A

Introduction
The Vector Data Model in GIS represents geographic features using discrete geometric objects (points, lines, polygons), emphasizing precise location and topological relationships.

The main advantage of this model is its Efficiency for network analysis.

Information Booster

Efficiency for Network Analysis

• This is a key strength of the vector model because its structure inherently supports network topology.
• Lines (or arcs) are defined by nodes and vertices, allowing the system to understand connectivity, direction of flow, and contiguity—essential for modeling real-world networks like roads, pipelines, and rivers.
• The model facilitates fast and accurate calculation of tasks such as finding the shortest path (routing applications), determining optimal flow direction, and defining service areas (e.g., travel time zones).

Additional Knowledge

Complex data structure

• This is generally considered a disadvantage.
• The vector model, especially when storing topological information (how features relate to each other), requires complex data tables and more overhead than the simpler cell-based structure of the raster model.

Difficult overlay operations

• This is also a disadvantage.
• Geometric operations like polygon overlay (finding the intersection or union of complex features) involve intensive calculations (e.g., finding new vertices and edges), making them typically slower and more computationally demanding than the straightforward cell-by-cell operations used in the raster model.

Not compatible with satellite imagery

• This is incorrect.
• While satellite imagery is stored in the raster data model (a grid of pixels), GIS software is designed to integrate and overlay vector data on top of raster imagery.
• Data conversion between the two models (e.g., digitizing features from an image) is a routine GIS task.