prantogg opened a new pull request, #469:
URL: https://github.com/apache/sedona-db/pull/469
Implements the `ST_AsGeoJSON` function for converting geometry and geography
objects to GeoJSON format with support for multiple output types (Simple,
Feature, FeatureCollection).
Simple GeoJSON geometry:
```
SELECT ST_AsGeoJSON(ST_Point(1.0, 2.0));
-- {"type":"Point","coordinates":[1.0,2.0]}
```
As Feature:
```
SELECT ST_AsGeoJSON(ST_Point(1.0, 2.0), 'Feature');
--
{"type":"Feature","geometry":{"type":"Point","coordinates":[1.0,2.0]},"properties":null}
```
As FeatureCollection
```
SELECT ST_AsGeoJSON(ST_Point(1.0, 2.0), 'FeatureCollection');
-- {"type":"FeatureCollection","features":[...]}
```
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