This session explains how to find open data and load it in your web applications in a performant manner. We’ll showcase a methodology for finding open datasets to provide context for your maps. Then we’ll use the open-source plugin MapLibre ArcGIS to connect to, query, and render large municipal datasets from geoportals – with a focus on environmental use cases. We’ll construct SQL and spatial queries against public services, then render the results in a browser using the GeoJSON and vector tile standards.

Later on, we’ll delve deeper into how to further optimize performance in a browser: compressing the GeoJSON format into PBF, applying on-demand loading algorithms, and seeding vector tiles. Stay tuned for an insightful talk that will improve the performance of your applications and connect you to open data.