Esri ArcGIS Pro Associate Pro Certification Practice Exam

What is true regarding each pixel of a raster?

1. Each pixel is displayed on a different coordinate system.

2. Each pixel contains attribute information.

3. Each pixel represents only the color of the raster.

4. Each pixel cannot be analyzed individually.

The correct answer is: Each pixel contains attribute information.

Each pixel in a raster dataset holds attribute information, which can represent various types of data depending on the raster's purpose. For instance, in a digital elevation model (DEM), each pixel would contain elevation values, while in a land cover classification raster, each pixel might indicate the type of land cover. This ability to store attribute data is central to the utility of raster datasets in geographical analysis, as it allows for the examination and manipulation of the data based on the values of individual pixels. The other options do not correctly represent the nature of raster data. While pixels are indeed assigned coordinates that relate to a specific coordinate system for the entire raster, they do not individually display in different systems. The assertion that each pixel represents only the color of the raster reduces the functionality of pixel data since pixels can represent more than just color—they can hold numerical or categorical values relating to various attributes. Finally, while analysis often occurs at the level of the raster as a whole, each pixel can still be analyzed individually, allowing for detailed examination and processing of spatial information.