{"version":"2026-06","coverage":"continental US (lower 48 + DC)","states":["AL","AZ","AR","CA","CO","CT","DE","DC","FL","GA","ID","IL","IN","IA","KS","KY","LA","ME","MD","MA","MI","MN","MS","MO","MT","NE","NV","NH","NJ","NM","NY","NC","ND","OH","OK","OR","PA","RI","SC","SD","TN","TX","UT","VT","VA","WA","WV","WI","WY"],"sources":{"roads":"OpenStreetMap (Geofabrik per-state, 0.25 deg tiles)","addresses":["NAD (US DOT, rooftop)","OpenAddresses (rooftop)","OSM addr:* nodes (interpolated)"],"interpolation":"Census TIGER 2024 edges-geodatabase (per-state)"},"confidence_indicator":{"response_fields":["origin_matches","destination_matches"],"values":{"rooftop":"exact mapped point (NAD or OpenAddresses)","interpolated":"OSM addr-node or TIGER segment interpolation (~30-100m)","coords":"caller-supplied lat,lng directly","empty":"geocode failed; raw input echoed"}},"deviations_from_google":["key= is our own API key, not Google's","no live traffic; free-flow time only","place_id: inputs return NOT_FOUND","long cross-country routes may return ZERO_RESULTS (commute distances work)","centroid-quality geocodes return NOT_FOUND instead of approximate"]}