255 行
无行尾
8.8 KiB
PHP
255 行
无行尾
8.8 KiB
PHP
<?php
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if (!defined('BASEPATH')) exit('No direct script access allowed');
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class Distances_model extends CI_Model
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{
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function __construct()
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{
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// Call the Model constructor
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parent::__construct();
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}
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public $bandslots = array("160m"=>0,
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"80m"=>0,
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"60m"=>0,
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"40m"=>0,
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"30m"=>0,
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"20m"=>0,
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"17m"=>0,
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"15m"=>0,
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"12m"=>0,
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"10m"=>0,
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"6m" =>0,
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"4m" =>0,
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"2m" =>0,
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"70cm"=>0,
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"23cm"=>0,
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"13cm"=>0,
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"9cm"=>0,
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"6cm"=>0,
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"3cm"=>0,
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"1.25cm"=>0);
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function get_worked_sats() {
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$CI =& get_instance();
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$CI->load->model('Stations');
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$station_id = $CI->Stations->find_active();
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// get all worked sats from database
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$sql = "SELECT distinct col_sat_name FROM ".$this->config->item('table_name')." WHERE station_id = ".$station_id . " and coalesce(col_sat_name, '') <> ''";
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$data = $this->db->query($sql);
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$worked_sats = array();
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foreach($data->result() as $row){
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array_push($worked_sats, $row->col_sat_name);
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}
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return $worked_sats;
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}
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function get_worked_bands() {
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$CI =& get_instance();
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$CI->load->model('Stations');
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$station_id = $CI->Stations->find_active();
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// get all worked slots from database
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$sql = "SELECT distinct LOWER(COL_BAND) as COL_BAND FROM ".$this->config->item('table_name')." WHERE station_id = ".$station_id;
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$data = $this->db->query($sql);
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$worked_slots = array();
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foreach($data->result() as $row){
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array_push($worked_slots, $row->COL_BAND);
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}
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// bring worked-slots in order of defined $bandslots
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$results = array();
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foreach(array_keys($this->bandslots) as $slot) {
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if(in_array($slot, $worked_slots)) {
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array_push($results, $slot);
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}
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}
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return $results;
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}
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function get_distances($postdata, $measurement_base)
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{
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$CI =& get_instance();
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$CI->load->model('Stations');
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$station_id = $CI->Stations->find_active();
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$station_gridsquare = $CI->Stations->find_gridsquare();
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$gridsquare = explode(',', $station_gridsquare); // We need to convert to an array, since a user can enter several gridsquares
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$this->db->select('col_call callsign, col_gridsquare grid');
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$this->db->where('LENGTH(col_gridsquare) >', 0);
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if ($postdata['band'] == 'sat') {
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$this->db->where('col_prop_mode', $postdata['band']);
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if ($postdata['sat'] != 'All') {
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$this->db->where('col_sat_name', $postdata['sat']);
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}
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}
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else {
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$this->db->where('col_band', $postdata['band']);
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}
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$this->db->where('station_id', $station_id);
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$dataarrayata = $this->db->get($this->config->item('table_name'));
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$this->plot($dataarrayata->result_array(), $gridsquare, $measurement_base);
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}
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// This functions takes query result from the database and extracts grids from the qso,
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// then calculates distance between homelocator and locator given in qso.
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// It builds an array, which has 50km intervals, then inputs each length into the correct spot
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// The function returns a json-encoded array.
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function plot($qsoArray, $gridsquare, $measurement_base) {
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$stationgrid = strtoupper($gridsquare[0]); // We use only the first entered gridsquare from the active profile
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if (strlen($stationgrid) == 4) $stationgrid .= 'MM'; // adding center of grid if only 4 digits are specified
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switch ($measurement_base) {
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case 'M':
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$unit = "mi";
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$dist = '13000';
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break;
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case 'K':
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$unit = "km";
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$dist = '20000';
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break;
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case 'N':
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$unit = "nmi";
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$dist = '11000';
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break;
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default:
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$unit = "km";
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$dist = '20000';
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}
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if (!$this->valid_locator($stationgrid)) {
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header('Content-Type: application/json');
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echo json_encode(array('Error' => 'Error. There is a problem with the gridsquare set in your profile!'));
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}
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else {
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// Making the array we will use for plotting, we save occurrences of the length of each qso in the array
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$j = 0;
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for ($i = 0; $j < $dist; $i++) {
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$dataarray[$i]['dist'] = $j . $unit . ' - ' . ($j + 50) . $unit;
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$dataarray[$i]['count'] = 0;
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$dataarray[$i]['calls'] = '';
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$dataarray[$i]['callcount'] = 0;
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$j += 50;
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}
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$qrb = array ( // Used for storing the QSO with the longest QRB
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'Callsign' => '',
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'Grid' => '',
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'Distance' => '',
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'Qsoes' => '',
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'Grids' => ''
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);
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foreach ($qsoArray as $qso) {
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$qrb['Qsoes']++; // Counts up number of qsoes
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$bearingdistance = $this->bearing_dist($stationgrid, $qso['grid'], $measurement_base); // Calculates distance based on grids
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$arrayplacement = $bearingdistance / 50; // Resolution is 50, calculates where to put result in array
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if ($bearingdistance > $qrb['Distance']) { // Saves the longest QSO
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$qrb['Distance'] = $bearingdistance;
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$qrb['Callsign'] = $qso['callsign'];
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$qrb['Grid'] = $qso['grid'];
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}
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$dataarray[$arrayplacement]['count']++; // Used for counting total qsoes plotted
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if ($dataarray[$arrayplacement]['callcount'] < 5) { // Used for tooltip in graph, set limit to 5 calls shown
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if ($dataarray[$arrayplacement]['callcount'] > 0) {
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$dataarray[$arrayplacement]['calls'] .= ', ';
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}
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$dataarray[$arrayplacement]['calls'] .= $qso['callsign'];
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$dataarray[$arrayplacement]['callcount']++;
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}
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}
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if (!$qrb['Qsoes'] == 0) { // We have a result :)
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header('Content-Type: application/json');
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$data['ok'] = 'OK';
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$data['qrb'] = $qrb;
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$data['qsodata'] = $dataarray;
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$data['unit'] = $unit;
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echo json_encode($data);
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}
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else {
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header('Content-Type: application/json');
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echo json_encode(array('Error' => 'No QSOs found to plot.'));
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}
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}
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}
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/*
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* Checks the validity of the locator
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* Input: locator
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* Returns: bool
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*/
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function valid_locator ($loc) {
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$regex = '^[A-R]{2}[0-9]{2}[A-X]{2}$';
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if (preg_match("%{$regex}%i", $loc)) {
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return true;
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}
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else {
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return false;
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}
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}
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/*
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* Converts locator to latitude and longitude
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* Input: locator
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* Returns: array with longitude and latitude
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*/
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function loc_to_latlon ($loc) {
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/* lat */
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$l[0] =
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(ord(substr($loc, 1, 1))-65) * 10 - 90 +
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(ord(substr($loc, 3, 1))-48) +
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(ord(substr($loc, 5, 1))-65) / 24 + 1/48;
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$l[0] = $this->deg_to_rad($l[0]);
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/* lon */
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$l[1] =
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(ord(substr($loc, 0, 1))-65) * 20 - 180 +
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(ord(substr($loc, 2, 1))-48) * 2 +
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(ord(substr($loc, 4, 1))-65) / 12 + 1/24;
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$l[1] = $this->deg_to_rad($l[1]);
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return $l;
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}
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function deg_to_rad ($deg) {
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return (M_PI * $deg/180);
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}
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function bearing_dist($loc1, $loc2, $measurement_base) {
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$loc1 = strtoupper($loc1);
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$loc2 = strtoupper($loc2);
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if (strlen($loc1) == 4) $loc1 .= 'MM';
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if (strlen($loc2) == 4) $loc2 .= 'MM';
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if (!$this->valid_locator($loc1) || !$this->valid_locator($loc2)) {
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return 0;
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}
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$l1 = $this->loc_to_latlon($loc1);
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$l2 = $this->loc_to_latlon($loc2);
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$co = cos($l1[1] - $l2[1]) * cos($l1[0]) * cos($l2[0]) + sin($l1[0]) * sin($l2[0]);
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$ca = atan2(sqrt(1 - $co*$co), $co);
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switch ($measurement_base) {
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case 'M':
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return round(6371*$ca/1.609344);
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case 'K':
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return round(6371*$ca);
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case 'N':
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return round(6371*$ca/1.852);
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default:
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return round(6371*$ca);
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}
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}
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} |