Question

A GIS analyst has two raster datasets with the same number of rows and columns. The analyst computes the average of the two input raster layers to generate a new raster layer with the same size as the input raster layers. What type of raster data analysis operation is performed?

• A. Local
• B. Neighborhood
• C. Zonal
• D. Global

Hint:

If the output cell is a function of only the same-location input cell(s), it’s a {local} operation. Window-based $⇒$ neighborhood; zone-based $⇒$ zonal; whole-image $⇒$ global.

Answer 1

The Correct Option is A

Reasoning.
Averaging two rasters cell-by-cell (same row/column index) produces an output raster of identical dimensions where each output cell depends only on the corresponding input cell values at the same location. This is exactly a local (per-cell) raster operation (also called map algebra).
Neighborhood uses a moving window around each cell. Zonal aggregates over zones defined by another raster. Global uses all cells at once. None of these applies here.