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Geocode

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    Geocode

    Hi All

    I'm looking for a way to bulk geocode addresses stored in a dbf table using the geocode_address() function. In the table I have the usual address fields and a set of latitude and longitude fields. (Please see field names below)

    I've tested the sample code from Alphapedia and it works great, just not sure how to best implement the code into my database.

    Any suggestions on how to best use the geocode function in order to bulk generate the long and lat? Or if I can be done on either on a form or through the field rule events?

    Code:
    Svc_Add1
    Svc_Add2
    Svc_Unit
    Svc_City
    Svc_State
    Svc_Zip	
    Svc_Cntry
    Lat	
    Long

    #2
    Re: Geocode

    I'd have to test tomorrow but given the geocode_address() function you should be able to use an update operation.

    update the lat field with something like

    geocode_address(alltrim(Svc_Add1)+", "+alltrim(Svc_City)+", "+alltrim(Svc_State), "Google").lat
    There can be only one.

    Comment


      #3
      Re: Geocode

      Thanks Stan!

      That seems to work great.

      Comment


        #4
        Re: Geocode

        Thought it would. I assume you did the same for the long field?

        Once you have current records populated you could change the lat and long fields to calculated and make the calculation expression

        geocode_address(alltrim(Svc_Add1)+", "+alltrim(Svc_City)+", "+alltrim(Svc_State), "Google").lat
        geocode_address(alltrim(Svc_Add1)+", "+alltrim(Svc_City)+", "+alltrim(Svc_State), "Google").lon

        to have them automatically populated for new records.
        There can be only one.

        Comment


          #5
          Re: Geocode

          Yeah...I did the same for the long field and it works great.

          I changed the lat and long fields to calculated and used your expression, however I got the below error while trying to save the field rules.

          Capture.JPG

          Comment


            #6
            Re: Geocode

            I suppose the field calculation rule doesn't have time to perform the internet connection and return a result.

            You might try a form level cansave event script to populate the fields assuming new record entry is through a form.
            There can be only one.

            Comment


              #7
              Re: Geocode

              I'm thinking about just modifying my save button on the form to run the calculation.

              Slightly off topic....But can you perform a geographic search on the google map alternative view using a DBF? The training video shows the location search field using a SQL database, however I can not see the option on my DBF set up.

              Comment


                #8
                Re: Geocode

                I've never seen the video so I couldn't say.
                There can be only one.

                Comment


                  #9
                  Re: Geocode

                  I'm trying to update my database and add the latitude and longitude for the addresses using the above function and syntax suggested by Stan. It's not working for me reliably. I put the function in an update operation and ran it on a few records and it worked. Now when I try to run the exact same update operation on more records, it doesn't work anymore. I'd appreciate it very much if someone else would try this and let me know if it is working for you or if it's a problem with the function itself.

                  UPDATE: Changed the service from google to nominatim and it worked perfectly, so the problem is with google. Hope this information will help someone else in the future.

                  UPDATE 2: Back to square one, formula not working again :( any ideas?
                  Last edited by Charlain; 04-10-2013, 12:17 PM.

                  Comment


                    #10
                    Re: Geocode

                    This code has also stopped working for me too.

                    I've also tried using the test example provided wiki.alpha.

                    Code:
                    dim address as C = "70 Blanchard Rd, Burlington, MA"
                    ?geocode_address(address, "Google")
                    This does not seem to be working either.

                    Would someone mind trying to rum this script to see if this an issue with my system or with Alpha Five?

                    Thanks

                    Comment


                      #11
                      Re: Geocode

                      dim address as C = "70 Blanchard Rd, Burlington, MA"

                      ?geocode_address(address, "Google")
                      = error_code = 0
                      error_text = ""
                      lat = "42.4796040"
                      lon = "-71.2032800"
                      There can be only one.

                      Comment


                        #12
                        Re: Geocode

                        Worked for me

                        = error_code = 0
                        error_text = ""
                        lat = "42.4796040"
                        lon = "-71.2032800"

                        Comment


                          #13
                          Re: Geocode

                          Thanks for checking!

                          The fault must be on my end.

                          By any chance is this function tied in with Internet Explorer?

                          Comment


                            #14
                            Re: Geocode

                            Originally posted by ADCO Service View Post

                            By any chance is this function tied in with Internet Explorer?
                            Most likely.

                            I think Google has a limit on the number of times you can make a request per day

                            Comment


                              #15
                              Re: Geocode

                              Have only tried to run a couple of hundred addresses in the past two days.

                              Zero results have been generated.

                              Thinking the issue might be related to some Anti Virus updates created by our IT company.

                              Comment

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