Geocodificando un archivo de texto, usando GoogleMaps desde PHP. Ejecutar "php -f geocoding.php"

geocoding.php

<?php

function clean($string)
{
  $string = strtr($string,"áéíóúÁÉÍÓÚñÑ.","aeiouAEIOUnN ");
	// Remove all remaining other unknown characters
	// $string = preg_replace('/[^a-zA-Z0-9\-]/', ' ', $string);
	// $string = preg_replace('/^[\-]+/', '', $string);
	// $string = preg_replace('/[\-]+$/', '', $string);
	// $string = preg_replace('/[\-]{2,}/', ' ', $string);
	return $string;
}


/*  archivo.txt 
Catamarca 323, Tucuman, Argentina
Balcarce 50, CABA, Argentina
Avenida Paseo Colón 828, Ciudad Autonoma de Buenos Aires, Argentina
...
*/

  $lines = file('archivo.txt');
  foreach ($lines as $line_num => $line) {
    $direccion = clean(strtoupper($line));
    $url = urlencode("http://maps.google.com/maps/api/geocode/xml?address='" . $direccion . "'&sensor=false");
    $xml = simplexml_load_file($url);
    if ( $xml->status == 'OK' ) {
      if ( count($xml->result) == 1 ) {
        print $xml->status . "\t" . $xml->result->formatted_address . "\t" . $xml->result->geometry->location->lat . "\t" . $xml->result->geometry->location->lng . "\n";
      }
      else {
        print count($xml->result) . "\t" . $xml->result->formatted_address . "\t" . $xml->result->geometry->location->lat . "\t" . $xml->result->geometry->location->lng . "\n";
      }
    }
    else {
      print $xml->status . "\n";
    }

  }
?>

La próxima versión la hago con nominatim de OSM

http://nominatim.openstreetmap.org/search?format=json&city=localidad&county=departamento&state=Provincia&country=Argentina

http://nominatim.openstreetmap.org/search?format=json&city=ciudad&county=Cantón...&state=Provincia_de...&country=Ecuador

https://nominatim.openstreetmap.org/search?format=json&q=R%C3%ADo%20Ceballos,%20C%C3%B3rdoba