Esri ArcGIS Pro Associate Pro Certification Practice Exam

The use of prerendered images in GIS enhances the performance of which type of layer?

1. Feature Layer

2. Tile Layer

3. Map Image Layer

4. Scene Layer

The correct answer is: Tile Layer

The use of prerendered images in GIS is particularly beneficial for Tile Layers. Tile Layers are composed of a collection of images (tiles) that are pre-generated at various scales and organized in a grid pattern. When a user navigates the map, only the relevant tiles for the current view are loaded, which allows for fast rendering and enhances overall performance. Since the tiles are already rendered, the system can quickly deliver the appropriate images to the user, leading to quicker access and smoother interactions compared to layers that require dynamic rendering, such as Feature Layers or Map Image Layers. This efficiency is especially noticeable in web mapping applications where quick loading times and responsiveness are critical for user experience. In contrast, Feature Layers consist of vector data that are dynamically rendered based on the attributes and geometry of the features, which can be more computationally intensive. Map Image Layers are collections of rendered map images generated from a map service, but they may not provide the same level of performance optimization as Tile Layers since they do not use a grid system for quick access. Scene Layers, used primarily for 3D data visualization, often rely on dynamic rendering as well, which does not utilize prerendered images in the same way that Tile Layers do.