Question

A GIS analyst is measuring the shortest route through a road network stored as raster data. Which approach will be used?

• A. Using attribute queries only
• B. Adding grid-cell lengths along the path
• C. Calculating polygon areas
• D. Ignoring diagonal connections

Hint:

Raster shortest path: \[ \boxed{ \text{Total Distance} = \sum \text{Grid Cell Lengths (or Costs)} } \]

Answer 1

The Correct Option is B

Concept: In raster-based network analysis, the shortest path is determined by accumulating the travel cost or distance through connected grid cells.

Step 1: Understand raster routing. Each grid cell contributes a distance or cost, and the total path length is obtained by summing these values.

Step 2: Choose the correct approach. Thus, \[ \boxed{\text{Shortest routes in raster networks are computed by adding grid-cell lengths along the path}.} \] Therefore, the correct option is \[ \boxed{(B).} \]