Feature Request: ArcGIS FeatureServer (GeoServices) Support

[uucokgis]

Summary

Add ArcGIS FeatureServer (GeoServices REST API) support to enable compatibility with ArcGIS clients while maintaining existing OGC API functionality.

Why?

Many organizations use ArcGIS tools alongside OGC-compliant clients. Supporting both standards from the same PostGIS backend would be valuable.

Proposed Approach

• New optional endpoints under /rest/services/ (disabled by default via config)
• Reuses existing catalog and query infrastructure
• Converts GeoJSON output to Esri JSON format
• Handles WKID/SRID conversions (e.g., 102100 ↔ 3857)

Implementation Status

I have a working implementation ready to contribute:

• Core endpoints: /rest/info, /rest/services/{id}/FeatureServer, /rest/services/{id}/FeatureServer/{layer}/query
• Tested with 298k+ features, works with ArcGIS JS API
• Zero impact on existing OGC API code

Questions

1. Is this feature of interest?
2. Any preferences on API structure or configuration?
3. What test coverage level do you expect?

Happy to open a PR if this aligns with project goals.
Code: master...uucokgis:pg_featureserv:feature/arcgis-geoservices-support
uucokgis#2

[pramsey]

How divergent are the end points? That is, how much leverage comes from being embedded in this project?