WorldWind Kotlin/earth.worldwind.formats.gpkg/foreignFeaturePropertiesJson

foreignFeaturePropertiesJson

fun foreignFeaturePropertiesJson(columnValues: Map<String, Any?>): String?

Serialize a foreign (non-WorldWind) features row's attribute columns into the flat JSON object that earth.worldwind.layer.source.CachedFeatureRow.properties carries, so external GeoPackage features (ArcGIS / QGIS exports) read into WorldWind with their attributes intact. WorldWind's own caches keep a single feature_properties JSON column and bypass this. Returns null for an attribute-less row (treated as an empty property map downstream).