What service type should be used to enhance the performance of map services over the web?

Using a WMTS (Web Map Tile Service) is ideal for enhancing the performance of map services over the web. WMTS delivers pre-rendered map tiles to clients, which allows fast and efficient display of map layers. Instead of generating map images on-the-fly for each request, which can be resource-intensive and time-consuming, WMTS serves static tiles that can be quickly retrieved and rendered in the browser. This reduces server load and significantly improves map rendering speed and user experience, especially when dealing with large datasets and high-resolution maps.

In contrast, the other service types focus on different functionalities. WCS (Web Coverage Service) is primarily designed for providing raster data and often involves more processing, which may not be as performant. WFS (Web Feature Service) allows for the retrieval and manipulation of vector-based geospatial data, which can also lead to increased processing time if many features are being queried. Geodata services offer advanced data management capabilities but are typically used for specific workflows and may not prioritize performance for map display in the same way that WMTS does. Thus, WMTS is the most suitable choice for enhancing the performance of map services over the web.