When it comes to accessing spatial analysis tools in web maps, there are several options available, depending on the platform and framework used. For instance, web mapping APIs and libraries like Leaflet, OpenLayers, Mapbox GL JS, or ArcGIS API for JavaScript offer built-in or plugin-based spatial analysis functions and widgets. These can be used to perform basic spatial queries, measurements, and buffering, as well as more advanced operations and calculations with Turf.js. Additionally, web mapping platforms and applications such as ArcGIS Online, Google Maps, or Carto provide ready-to-use spatial analysis tools and workflows. These can be used to execute tasks like overlay, aggregation, interpolation, clustering, or hotspot analysis with ArcGIS Online or distance matrix, directions, or elevation analysis with Google Maps. Last but not least, web services and APIs like ArcGIS REST API, Google Maps Platform, or Mapbox APIs expose spatial analysis capabilities and functions. These can be employed for geoprocessing tasks such as geocoding, routing, network analysis or spatial statistics with ArcGIS REST API or geocoding, directions matrix or isochrone analysis with Mapbox APIs.