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Google Maps
Posted: Wed Dec 12, 2007 2:17 pm
by Randal
All,
Does anyone have a sample of how to search Google Maps for an address from within a fwh program?
Thanks,
Randal Ferguson
Posted: Wed Dec 12, 2007 2:29 pm
by Antonio Linares
Randal,
This is a working sample developed by JL Capel:
Code: Select all
// Radios and WHEN on a GET
#INCLUDE "FIVEWIN.CH"
FUNCTION MAIN()
LOCAL oDlg, oRadio1, oGet1, obtn
LOCAL cCurrency := "USD "
LOCAL nOption := 1
DEFINE DIALOG oDlg ;
FROM 1, 1 TO 10, 30
@ 1, 1 RADIO oRadio1 VAR nOption OF oDlg UPDATE ;
PROMPT "Estatua Libertad ", "Fortaleny - Valencia - EspaÒa", "Torre Eiffel - ParÌs "
@ 3, 1 BUTTON oBtn PROMPT "Ver el Mapa" ACTION VerMapa (oDlg, nOption)
ACTIVATE DIALOG oDlg CENTERED
RETURN NIL
Function VerMapa( oDlgp, nMapa )
local ownd, oactivex
LOCAL cHtml
LOCAL nLat, nLon, nZoom
DO CASE
CASE nMapa == 1
nLat := 48.858333
nLon := 2.295000
nZoom := 20
CASE nMapa == 2
nLat := 39.183994491715936
nLon := -0.31486988067626952
nZoom := 18
CASE nMapa == 3
nLat := 40.689360
nLon := -74.044400
nZoom := 20
ENDCASE
cHtml := [ <html> <head> ]+CRLF
cHtml += [ <meta http-equiv="content-type" content="text/html; charset=utf-8"/> ]+CRLF
cHtml += [ <title>Google Maps</title> ]+CRLF
cHtml += [ <script src="http://maps.google.com/maps?file=api&v=2&key=1223" type="text/javascript"></script> ]+CRLF
cHtml += [ <script type="text/javascript"> ]+CRLF
cHtml += " //<![CDATA[ " +CRLF
cHtml += " function load() "+CRLF
cHtml += " { if (GBrowserIsCompatible()) "+CRLF
cHtml += [ { var map = new GMap2(document.getElementById("map"),G_SATELLITE_TYPE); ] + CRLF
cHtml += " map.addControl(new GLargeMapControl()); "+CRLF
cHTML += " map.addControl(new GMapTypeControl()); "+CRLF
cHTML += " map.addControl(new GOverviewMapControl()); "+CRLF
cHTML += " map.setCenter(new GLatLng(<<<LAT>>>, "+CRLF
CHTML += " <<<LONG>>>),<<<ZOOM>>>); "+CRLF
CHTML += " map.setMapType(G_HYBRID_TYPE); "+CRLF
CHTML += " } } "+CRLF
CHTML += " //]]> </script> </head> "+CRLF
CHTML += [ <body scroll="no" bgcolor="#CCCCCC" topmargin="0" leftmargin="0" ] +CRLF
CHTML += [ onload="load()" onunload="GUnload()"> ] + CRLF
chtml += [ <div id="map" style="width:450px;height:300px"></div> ] + CRLF
chtml += [ </body> </html> ]
cHtml := STRTRAN(cHtml, "<<<LONG>>>",STR(nLon) )
cHtml := STRTRAN(cHtml, "<<<LAT>>>",STR(nLat) )
cHtml := STRTRAN(cHtml, "<<<ZOOM>>>",STR(nZoom) )
MemoWrit("mihtml.htm",chtml)
DEFINE WINDOW oWnd TITLE "FiveWin ActiveX Support"
oActiveX = TActiveX():New( oWnd, "Shell.Explorer.2" )
oWnd:oClient = oActiveX // To fill the entire window surface
oActiveX:Do("Navigate2",(CurDrive() + ":\"+CurDir()+"\MiHtml.htm"))
ACTIVATE WINDOW oWnd
RETUR NIL
Posted: Wed Dec 12, 2007 2:48 pm
by Otto
Hello Antonio,
Thank you for this post and many thanks to JL Capel.
Is there an easy way to get the
latitude and longitude from a given town name ?
Thanks in advance,
Otto
Posted: Wed Dec 12, 2007 2:52 pm
by Antonio Linares
Otto,
I don't know, you may search in google
Posted: Wed Dec 12, 2007 3:57 pm
by Randal
Antonio,
Thanks for the sample. I did search the forum and had found this sample however I need to be able to show a map based on an address, not lat/lon coordinates. I think the Google API has a method for returning the lat/lon coordinates for a given address. Unfortunately, I don't know enough about java to write a program to do this and I could not find a method for just showing a map based on the address.
Thanks,
Randal
Posted: Wed Dec 12, 2007 4:18 pm
by Barry O'Brien
Hi Randal,
I don't know anything about the google maps interface but going back a few months I was under the impression it only worked on lat\long co-ordinates.
The last company I worked for had to buy a data set for all UK addresses which also had all the lat\long co-ordinates in it. This way they could just do a database lookup using the address to get the lat\long co-ordinates to then do the google maps lookup.
I wasn't involved in the development of this unfortunately so I can't tell you any more about how it worked. In any case I would imagine the google maps api has moved on since then!
Kind regards,
Barry
Posted: Wed Dec 12, 2007 5:13 pm
by Randal
Barry,
It appears there is a method for this:
getLatLng(address, callback)
Sends a request to Google servers to geocode the specified address. If the address was successfully located, the user-specified callback function is invoked with a GLatLng point. Otherwise, the callback function is given a null point. In case of ambiguous addresses, only the point for the best match is passed to the callback function. (Since 2.55)
Thanks,
Randal
Barry O'Brien wrote:Hi Randal,
I don't know anything about the google maps interface but going back a few months I was under the impression it only worked on lat\long co-ordinates.
The last company I worked for had to buy a data set for all UK addresses which also had all the lat\long co-ordinates in it. This way they could just do a database lookup using the address to get the lat\long co-ordinates to then do the google maps lookup.
I wasn't involved in the development of this unfortunately so I can't tell you any more about how it worked. In any case I would imagine the google maps api has moved on since then!
Kind regards,
Barry
Posted: Wed Dec 12, 2007 10:13 pm
by Rafael Clemente
Otto, Randal:
If you send me your email I can send you one working sample
Rafael
Posted: Wed Dec 12, 2007 10:41 pm
by Randal
Rafael Clemente wrote:Otto, Randal:
If you send me your email I can send you one working sample
Rafael
You can send that to
swtechsup@yahoo.com
Thank you very much!
Randal Ferguson
Posted: Thu Dec 13, 2007 2:26 am
by RAMESHBABU
Mr.Rafael
Please share it with me also.
aksharasoft@hotmail.com
Regards
- Ramesh Babu P
Posted: Thu Dec 13, 2007 8:13 am
by Otto
Thank you Rafael.
Here is my email:
datron@aon.at
Posted: Thu Dec 13, 2007 8:14 am
by Antonio Linares
Rafael,
Would you mind to post the example source code here ? many thanks!
Posted: Thu Dec 13, 2007 1:08 pm
by Rafael Clemente
Antonio:
This is the demo code:
#include "FiveWin.ch"
Function Main()
Local oDlg
Local cStreet := Padr("BROADWAY 500", 40)
Local cCity := Padr("NEW YORK CITY", 40)
Local cCountry := Padr("USA", 40)
Define Dialog oDlg From 0,0 To 12,45 Title "Google Maps test"
oDlg:lHelpIcon := .F.
@ 1,3 Say "Street and number:" Of oDlg Size 50,10
@ 1,8 Get cStreet Of oDlg Size 100,10 Picture "@K!"
@ 2,3 Say "City:" Of oDlg Size 50,10
@ 2,8 Get cCity Of oDlg Size 100,10 Picture "@K!"
@ 3,3 Say "Country:" Of oDlg Size 50,10
@ 3,8 Get cCountry Of oDlg Size 100,10 Picture "@K!"
@ 4,11 Button "Search" Of oDlg Action Posicion(Alltrim(cStreet)+"; "+AllTrim(cCity)+"; "+Alltrim(cCountry))
Activate Dialog oDlg Center
Return Nil
DLL FUNCTION Posicion( cTxt AS LPSTR ) AS LONG PASCAL LIB ".\Pos.dll"
Of course the trick is in the POS.DLL. Being a work in progress, I wouldn't like to make it public yet. But I'll be happy to send a copy to anybody interested. From the above code you can see how easy is to use it. It has taken Otto all of ten minutes to include it in his software
Rafael
Posted: Thu Dec 13, 2007 2:59 pm
by Otto
Regards,
Otto
Posted: Thu Dec 13, 2007 3:27 pm
by Biel EA6DD
Please Rafael can you send me a copy, thanks.
bmaimo@piema.info