Try these sample GeoJson URL

These URL can be saved as a GeoJson file
Socrata open data geojson URL format, Los Angeles Council District
     https://data.lacity.org/api/geospatial/5v3h-vptv?method=export&format=GeoJSON
Arcgis online hub geojson URL format, Los Angeles Council District
     https://opendata.arcgis.com/api/v3/datasets/76104f230e384f38871eb3c4782f903d_13/downloads/data?format=geojson&spatialRefId=4326&where=1%3D1

1. California Catalina Island Zoning
     https://transparentgov.net/data/sample/california_Catalina_Island_zoning.geojson
2. Santa Monica, California (mixed line and point in a single geojson file)
     https://transparentgov.net/data/sample/geojson/linePointMix.geojson
3. Alaska Solid Waste Sites
     https://transparentgov.net/data/sample/alaska_Solid_Waste_Sites.geojson
4. Alaska Areas
     https://transparentgov.net/data/sample/alaska_Areas.geojson
5. World Countries
     https://transparentgov.net/data/sample/countries.geojson

  

92 Google Maps (web worker) :

    

92 Google Maps (web worker 4) :

    

93 Google Maps (cors)

    

93 Google Maps (jsonp)

    

93 Google Maps (proxy)

    

Mapbox vector

    

ESRI 3D clickable

    

ESRI 2D popup

    

ESRI 2D popup variant

    

click to download .geojson file

    

Upload xxx.geojson file from your computer

GoogleMaps

     https://transparentgov.net:3200/googlemaps93/upload