Question

In the context of raster datasets, what is a global operation?

A. It is one of the scales of raster analysis that determines the basic statistical values for the raster as a whole.
B. It is the process of dividing an input layer into two or more layers based on a split layer.
C. It is a type of neighborhood analysis examining the range of values in the moving window.
D. It is a single layer process of assigning a new class or range value to all pixels in the dataset based on their original values.
E. It is a type of operation performed on a single, target cell

Answer 1

A global operation in raster datasets within GIS is a process that applies the same calculation or reclassification to every cell in the dataset, affecting the data as a whole.

Step-by-step explanation:

In the context of raster datasets within Geographic Information Science (GIS), a global operation refers to a single layer process where each cell (or pixel) in the dataset is processed in the same way. This type of operation applies a mathematical calculation or reclassification to every cell in the raster, making changes based on their original values. For instance, this can mean adjusting the values to correct for measurement errors or to standardize data measurements. Unlike local operations, which affect individual cells, and neighborhood operations, which consider cells within a specified area around a target cell, global operations impact the dataset as a whole.