Import af meget store .dat filer?

Jeg er ved at lave en øvelse fra denne bog http://googlemapsbook.com/source/ og jeg regnede med at når jeg lavede nedenstående koder så skulle filerne blive importeret til tabellerne, men når jeg ser på phpmyadmin, så er disse data IKKE importeret. Nogen som kan hjælpe? Jeg er nybegynder i PHP MySQL, så jeg kan ikke selv finde ud af, hvad problemet skulle være.:-(
RA.dat = 27.92 MB
EN.dat = 31.24 MB
CO.dat =  9.11 MB
Min side kan ses her http://www.tinemuller.dk/googlemapsbook/chapter5/DataImport/index.php og indeholder nedenstående koder:

index.php
------------------------------------------------
<?php

set_time_limit(0); // this could take a while

//ONLINE
// Connect to the database
require($_SERVER['DOCUMENT_ROOT'] . '/db_credentials.php');
$conn = mysql_connect($db_server, $db_user, $db_pass);
mysql_select_db($db_name, $conn);

// Open the Physical Location Coordinates file
$handle = @fopen("../../Data/RA.dat","r");
if ($handle) {
while (!feof($handle)) {
  $buffer = fgets($handle, 4096);
  $row = explode("|",$buffer);
  if ($row[3] > 0) {
  // Modify things before we insert them
  $row[12] = date("Y-m-d",strtotime($row[12]));
  $row[13] = date("Y-m-d",strtotime($row[13]));
  $row[23] = addslashes($row[23]);
  $row[24] = addslashes($row[24]);
  $row[30] = addslashes($row[30]);

  // Formulate our query
  $query = "INSERT INTO fcc_structure (unique_si, date_constr,
    date_removed, struc_address, struc_city, struc_state, struc_height,
    struc_elevation, struc_ohag, struc_ohamsl, struc_type)
    VALUES ({$row[4]}, '{$row[12]}', '{$row[13]}', '{$row[23]}',
    '{$row[24]}', '{$row[25]}', '{$row[26]}', '{$row[27]}', '{$row[28]}',
    '{$row[29]}', '{$row[30]}')";

  // Execute our query
  $result = @mysql_query($query);
  if (!$result) echo("ERROR: Duplicate structure info #{$row[4]} <br>\n");
  }
}
fclose($handle);
}

echo "Done Structures. <br>\n";

// Open the Ownership Data file
$handle = @fopen("../../Data/EN.dat","r");
if ($handle) {
while (!feof($handle)) {
  $buffer = fgets($handle, 4096);
  $row = explode("|",$buffer);
  if ($row[3] > 0) {
  $row[7] = addslashes($row[7]);
  $row[14] = addslashes($row[14]);
  $row[16] = addslashes($row[16]);
  $query = "INSERT INTO fcc_owner (unique_si_own, owner_name,
    owner_address, owner_city, owner_state, owner_zip) VALUES ({$row[4]},
    '{$row[7]}', '{$row[14]}','{$row[16]}', '{$row[17]}', '{$row[18]}')";
  $result = @mysql_query($query);
  if (!$result) {
    // Newer information later in the file: UPDATE instead
    $query = "UPDATE fcc_owner SET owner_name='{$row[7]}',
    owner_address='{$row[14]}', owner_city='{$row[16]}',
    owner_state='{$row[17]}', owner_zip='{$row[18]}'
    WHERE unique_si_own={$row[4]}";
    $result = @mysql_query($query);
    if (!$result)
    echo "Failure to import ownership for struc. #{$row[4]}<br>\n";
    else
    echo "Updated ownership for struc. #{$row[4]} <br>\n";
  }
  }
}
fclose($handle);
}

echo "Done Ownership. <br>\n";

// Open the Physical Locations file
$handle = @fopen("../../Data/CO.dat","r");
if ($handle) {
while (!feof($handle)) {
  $buffer = fgets($handle, 4096);
  $row = explode("|",$buffer);
  if ($row[3] > 0) {
  if ($row[9] == "S") $sign = -1; else $sign = 1;
  $dec_lat = $sign*($row[6]+$row[7]/60+$row[8]/3600);
  if ($row[14] == "W") $sign = -1; else $sign = 1;
  $dec_long = $sign*($row[11]+$row[12]/60+$row[13]/3600);
  $query = "INSERT INTO fcc_location (unique_si_loc, lat_deg, lat_min,
    lat_sec, lat_dir, latitude, long_deg, long_min, long_sec,
    long_dir, longitude) VALUES ({$row[4]},'{$row[6]}', '{$row[7]}',
    '{$row[8]}', '{$row[9]}', '$dec_lat','{$row[11]}', '{$row[12]}',
    '{$row[13]}', '{$row[14]}', '$dec_long')";
  $result = @mysql_query($query);
  if (!$result) {
    // Newer information later in the file: UPDATE instead
    $query = "UPDATE fcc_location SET lat_deg='{$row[6]}',
    lat_min='{$row[7]}', lat_deg='{$row[8]}', lat_dir='{$row[9]}',
    latitude='$dec_lat', long_deg='{$row[11]}', long_min='{$row[12]}',
    long_sec='{$row[13]}', long_dir='{$row[14]}', longitude='$dec_long'
    WHERE unique_si_loc='{$row[4]}'";
    $result = @mysql_query($query);
    if (!$result)
    echo "Failure to import location for struc. #{$row[4]} <br>\n";
    else
    echo "Updated location for struc. #{$row[4]} <br>\n";
  }
  }
}
fclose($handle);
}

echo "Done Locations. <br>\n";

?>
---------------------------------------

Tabellerne - sql_schema.txt
---------------------------------------
CREATE TABLE fcc_location (
    loc_id int(10) unsigned NOT NULL auto_increment,
    unique_si_loc bigint(20) NOT NULL default '0',
    lat_deg int(11) default '0',
    lat_min int(11) default '0',
    lat_sec float default '0',
    lat_dir char(1) default NULL,
    latitude double default '0',
    long_deg int(11) default '0',
    long_min int(11) default '0',
    long_sec float default '0',
    long_dir char(1) default NULL,
    longitude double default '0',
    PRIMARY KEY (loc_id),
    KEY unique_si (unique_si_loc)
) ENGINE=MyISAM ;

CREATE TABLE fcc_owner (
    owner_id int(10) unsigned NOT NULL auto_increment,
    unique_si_own bigint(20) NOT NULL default '0',
    owner_name varchar(200) default NULL,
    owner_address varchar(35) default NULL,
    owner_city varchar(20) default NULL,
    owner_state char(2) default NULL,
    owner_zip varchar(10) default NULL,
    PRIMARY KEY (owner_id),
    KEY unique_si (unique_si_own)
) ENGINE=MyISAM ;

CREATE TABLE fcc_structure (
    struc_id int(10) unsigned NOT NULL auto_increment,
    unique_si bigint(20) NOT NULL default '0',
    date_constr date default '0000-00-00',
    date_removed date default '0000-00-00',
    struc_address varchar(80) default NULL,
    struc_city varchar(20) default NULL,
    struc_state char(2) default NULL,
    struc_height double default '0',
    struc_elevation double NOT NULL default '0',
    struc_ohag double NOT NULL default '0',
    struc_ohamsl double default '0',
    struc_type varchar(6) default NULL,
    PRIMARY KEY (struc_id),
    KEY unique_si (unique_si),
    KEY struc_state (struc_state)
) ENGINE=MyISAM;

CREATE VIEW fcc_towers
    AS SELECT * FROM fcc_structure, fcc_owner, fcc_location
    WHERE unique_si=unique_si_own AND unique_si=unique_si_loc
    ORDER BY struc_state, struc_type;
   
CREATE TABLE capital_cities (
    uid int(11) NOT NULL auto_increment,
    country text NOT NULL,
    capital text NOT NULL,
    lat float NOT NULL default '0',
    lng float NOT NULL default '0',
    PRIMARY KEY (uid),
    KEY lat (lat,lng)
) ENGINE=MyISAM;