I have used Google geo address and using lat/long have got the address. How do I determine if I am on road on not? Basically hit-test for road? I am currently using location manager for lat/long and the GeoAddress is same for on road and next to road.
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2 Answers
Final Solution
Use reverse geocoding via the Google Geocoding API.
The term geocoding generally refers to translating a human-readable address into a location on a map. The process of doing the converse, translating a location on the map into a human-readable address, is known as reverse geocoding.
The Geocoding API supports reverse geocoding directly using the latlng parameter. For example, the following query contains the latitude/longitude value for a location in Brooklyn:
http://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&sensor=true_or_false
The docs explain how to interpret the json results but StackOverflow has various answers addressing more efficient ways to parse the data.
- https://stackoverflow.com/a/8095967/1085891
- https://stackoverflow.com/a/8314094/1085891
- https://stackoverflow.com/a/6335080/1085891
Possible Solutions
Getting the nearest street/road coordinates in android - the answer to this question may point you in the right direction.
You can use directions api directly: http://maps.googleapis.com/maps/api/directions/json?origin=51,19&destination=51,19&sensor=false
Could you use the API to find directions which would then provide the closest road?
- Stick position to road on android maps v2
- GPSLocator - App to Find Current (Nearest) Location using GPS - possibly helpful; not so sure on this one.
- Snap to Roads Android - Exact same question
Quick Search Results
- Snap to nearest street
- Maps API Blog using GDirections.loadFromWaypoints
- Finding nearest street given a lat-long location
- Driving route from my location to destination in Google Maps Android API V2
Unsolved Similar Questions
11 Comments
jason
@JSuar exactly as Mr.Johnson stated.
JSuar
Sorry about that. Updated my answer. If none of these links prove useful, I will delete my answer. Still researching, however.
jason
@JSuar Thanks again for your time and effort.
jason
econym.org.uk/gmap/example_snap.htm snaps to nearest road how does it know where the road is ? Its interesting .Can we implement the same on android google maps v2 ?Let me know any workaround.Thanks again for your time.
JSuar
@jason That solution relies on loadFromWaypoints. This SO question provides a solution to the restrictions placed on the function.
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It can be done so much easier with OSRM (nearest) webservice. Make a GET request like:
const url = '//router.project-osrm.org/nearest/v1/driving/'; fetch(url + coord.lon + ',' + coord.lat).then(function(response) { return response.json(); }).then(function(json) { if (json.code === 'Ok') { console.info(json.waypoints[0].location); } }); Which is a road/street coordinate.
References — Project-OSRM
