{"version":"1.0","type":"rich","title":"Leaflet vector tile map of rivers","description":"A Leaflet map displays U.S. river networks as blue vector tiles over an ESRI shaded-relief raster basemap, with gray state boundaries. The interactive map supports panning and zooming via URL hash synchronization. The river overlay is rendered using `L.TileLayer.d3_geoJSON`, which combines Leaflet’s tile system with D3’s GeoJSON rendering to fetch and draw river data from a TileStache/Gunicorn server. State boundaries come from a static GeoJSON object (`usStates`), while the river data source is attributed to NHDPlus v2.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-5602552?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}