Reverse Geocoding 1

[nzoli]

Hi all!

I was happy when I found this forum because it helped me so much!
So I have another vfp problem

I found a helpful thread (Using VFP WithYahoo Maps Geocoding API), but I need a reverse solution.

So I get a LAT/LON coordinates from my gps tracker.
I'm uplodaing to my MySQL server.
After I get, how can I reverse the LAT/LON to an addresses?

Thanks for your answer!

Ps.: I would like to measure the driven distance too... but this is another project

 

[Olaf Doschke]

I found

http://developer.yahoo.com/maps/rest/V1/geocode.html,

and it says the geocoding API is deprecated and should be replaced by PlaceFinder (see the red box on that page)

This leads me to

http://developer.yahoo.com/geo/placefinder/

and voilá, this offers both lookup of coordinates via an adress and the inverse lookup of an adress nearest to some coordinates.

That said I haven't got the time to try this API, but you might find the requests working in a asimilar way to what you already are using.

Bye, Olaf.

 

[Mike Lewis]

Nzoli,

As I'm sure you know, geocoding isn't necessarily a two-way street. You can always get the lat/long co-ordinates from an address, but you can't always get an address from the co-ordinates.

Sorry, I know this is stating the obvious. Presumably, your application is aware of this limitation.

Mike


__________________________________
Mike Lewis (Edinburgh, Scotland)

Visual FoxPro articles, tips, training, consultancy

 

[Olaf Doschke]

Mike, the yahoo placefinder api does reverse geocoding. Of course not any coordinates give an adress, but that is taken account of by yahoo, by three mechanisms:

1. Returning the coordinates of the nearest found adress besides the adress only
2. Returning a quality measurement, whatever exactly that indicates, you can choose to trust higher quality results more than lowe quality results.
3. Limiting results by a redius from the queried coordinates, which means no result when too far away from any adress.

If you're collecting GPS coordinates while doing delivery you can see at what adress a car is, perhaps, if you record coordinates while bicycling you can see where you drove.

@Nzoli, did you try placefinder? Sample requests simply done in a web browser work for me and you should already have an application id from using the older geocoding api.

Bye, Olaf.

 

[nzoli]

Thanks for you all the answers!

 

[nzoli]

@OlafDoschke:
yeah!
the yahoo placefinder is working THANKS

I'm using it with @andyrice's (

http://www.tek-tips.com/viewthread.cfm?qid=711778)

websave example...

@MikeLewis: Fortunately I don't need the full and accurate addresses, I have enough the country, the road number and the postal code. The rest is just bonus
I've tried a GPS number that is not near any settlement. I got the road number, the closest zip(maybe) and the county

thanks again for you all!