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FAQ

Q1: Can GeoJSON handle 3D data?

A1: Standard GeoJSON primarily focuses on 2D coordinates [longitude, latitude], but it does allow for an optional third coordinate [longitude, latitude, altitude] representing elevation. However, it doesn't define how 3D geometries or complex 3D models should be rendered.

Q2: Is GeoJSON efficient for extremely large datasets?

A2: For extremely large datasets with millions of features or complex geometries, GeoJSON can become quite large due to its text-based nature. In such cases, binary formats, vector tiles, or TopoJSON might offer better performance and smaller file sizes, especially for web delivery.

Q3: How do I add custom data to a GeoJSON feature?

A3: Each Feature object in GeoJSON has a properties member, which is a JSON object. You can add any key-value pairs you like within this properties object to store custom attributes associated with that geographic feature, like names, IDs, or other descriptive data.

Q4: Can I combine multiple types of geometries (points, lines, polygons) in one GeoJSON file?

A4: Yes, you can. The most common way is to use a "FeatureCollection" which can contain multiple "Feature" objects, and each feature can have its own geometry (point, line, polygon, etc.) and properties. This allows for a very flexible representation of diverse geographic data in a single file.