Learn topic
Learn why there is no universal size limit for GeoJSON, which characteristics make a dataset expensive to load and render, and when to simplify, split, stream, or tile the data instead.
Learn how GeoJSON represents geographic geometries, features, attributes, and collections in JSON, including its coordinate conventions and practical limitations.
Learn how EPSG:4326 and EPSG:3857 represent location differently, why web maps commonly use both, and which CRS is appropriate for storage, display, and spatial measurement.