Using VFP WithYahoo Maps Geocoding API 2

[jerry1117]

Does anyone have a sample of VFP code used to access Yahoo maps Geocoding API to get latitude and longitude for addresses?

 

[ilyad]

I don't have code samples. I found Yahoo maps API at

http://developer.yahoo.com/maps/ajax/index.html

http://filemakeradvisor.com/doc/18834

And also if you have a response from yahoo maps

CLOSE DATABASES
TEXT TO lcXml NOSHOW
<?xml version="1.0"?>
<ResultSet xmlns:xsi="[URL unfurl="true"]http://www.w3.org/2001/XMLSchema-instance"[/URL] 
	xmlns="urn:yahoo:maps" xsi:schemaLocation="urn:yahoo:maps 
	[URL unfurl="true"]http://api.local.yahoo.com/MapsService/V1/GeocodeResponse.xsd">[/URL]
<Result precision="address">
<Latitude>39.566221</Latitude>
<Longitude>-104.85991</Longitude>
<Address>15 INVERNESS WAY E</Address>
<City>ENGLEWOOD</City>
<State>CO</State>
<Zip>80112-5710</Zip>
<Country>US</Country>
</Result>
</ResultSet>
<!-- ws02.search.scd.yahoo.com uncompressed/chunked Mon May  1 08:40:15 PDT 2006 -->
ENDTEXT

LOCAL oXA AS XMLAdapter
oXA = CREATEOBJECT("XmlAdapter")
oXA.LoadXML(lcXml)
oXA.Tables.Item(1).ToCursor(,"crsResult")	
BROWSE LAST NOWAIT

 

[ilyad]

BTW, did you check

http://www.tek-tips.com/viewthread.cfm?qid=1337414&page=1

 

[baltman]

I think Google's is more flexible and allows 50k hit per key per day.

Brian

cAddress1 = "123 main st anywhere ny"
cAddress2 = "123 oak st anywhere ny"

?distance(google_geo(cAddress1),google_geo(cAddress2))

PROCEDURE google_geo
LPARAMETERS tcAddress
LOCAL CRLF, cUrl, oHTTP, cKey, cResult, cTag, lTag, oIE
  STORE CHR(13)+CHR(10) TO CRLF
  cKey = MyGoogleKey
  
  SET LIBRARY TO Home()+"Foxtools.fll" ADDITIVE 
  tcAddress = CHRTRAN(ALLTRIM(reduce(tcAddress)),CHR(32), "+")

  cURL = "[URL unfurl="true"]http://maps.google.com/maps/geo?q="[/URL] + tcAddress + "&output=csv&key=" + cKey
  
  oHTTP = CreateObject("MSXML2.XMLHTTP")
  oHTTP.Open("GET", cURL, .f.)
  oHTTP.Send
  cResult=(oHTTP.ResponseText)
 
  nCode=GETWORDNUM(cResult,1,",")
  nAccuracy=GETWORDNUM(cResult,2,",")
  nLat=GETWORDNUM(cResult,3,",")
  nLon=GETWORDNUM(cResult,4,",")
    
  STRTOFILE(cResult,'cut.txt')
  RETURN nLon + "," + nLat + "," + nCode + "," + nAccuracy 
 ENDIF 

*!*  CODE
*!*  G_GEO_SUCCESS (200) 
*!*    No errors occurred; the address was successfully parsed and its geocode has been returned. (Since 2.55) 

*!*  G_GEO_SERVER_ERROR (500) 
*!*    A geocoding request could not be successfully processed, yet the exact reason for the failure is not known. (Since 2.55) 

*!*  G_GEO_MISSING_ADDRESS (601) 
*!*    The HTTP q parameter was either missing or had no value. (Since 2.55) 

*!*  G_GEO_UNKNOWN_ADDRESS (602) 
*!*    No corresponding geographic location could be found for the specified address. This may be due to the fact that the address is relatively new, or it may be incorrect. (Since 2.55) 

*!*  G_UNAVAILABLE_ADDRESS (603) 
*!*    The geocode for the given address cannot be returned due to legal or contractual reasons. (Since 2.55) 

*!*  G_GEO_BAD_KEY (610) 
*!*    The given key is either invalid or does not match the domain for which it was given. (Since 2.55) 

*!*  Accuracy
*!*    0 Unknown location. (Since 2.59) 
*!*    1 Country level accuracy. (Since 2.59) 
*!*    2 Region (state, province, prefecture, etc.) level accuracy. (Since 2.59) 
*!*    3 Sub-region (county, municipality, etc.) level accuracy. (Since 2.59) 
*!*    4 Town (city, village) level accuracy. (Since 2.59) 
*!*    5 Post code (zip code) level accuracy. (Since 2.59) 
*!*    6 Street level accuracy. (Since 2.59) 
*!*    7 Intersection level accuracy. (Since 2.59) 
*!*    8 Address level accuracy. (Since 2.59) 

ENDPROC

PROCEDURE distance
LPARAMETERS tcGeo1, tcGeo2

  lnLon1 = VAL(GETWORDNUM(tcGeo1,1,","))
  lnLat1 = VAL(GETWORDNUM(tcGeo1,2,","))
  lnLon2 = VAL(GETWORDNUM(tcGeo2,1,","))
  lnLat2 = VAL(GETWORDNUM(tcGeo2,2,","))

  lnDistance = 3963.000000*ACOS(COS(DTOR(90-lnLat1))*COS(DTOR(90-lnLat2))+;
    SIN(DTOR(90-lnLat1))*SIN(DTOR(90-lnLat2))*COS(DTOR(lnLon1 - lnLon2)))
  
  IF lnDistance < .25
    lcDistance = TRANSFORM(ROUND(lnDistance*5280,2)) +" feet"
  ELSE
    lcDistance = TRANSFORM(ROUND(lnDistance,2)) + " miles"
  ENDIF 
  
  RETURN lcDistance 
ENDPROC

 

[jimoo]

This code looks pretty interesting... I tried to execute it but encountered an error with the variable, MyGoogleKey, not defined.

Can you tell me how that should be defined and I will try it again.



Jim Osieczonek
Delta Business Group, LLC

http://www.deltabg.com

 

[Mike Gagnon]

MyGoogleKey I believe is a unique Key supplied by Google when you open an account with them.

Mike Gagnon

If you want to get the best response to a question, please check out FAQ184-2483 first.
ReFox XI (www.mcrgsoftware.com)

 

[baltman]

http://www.google.com/apis/maps/signup.html

Enjoy.

Brian

 

[jerry1117]

Thanks so much for the Google geocoding sample. I used it and it worked great.