压缩路线规划中的经纬度点集
- PHP中文网original
- 2016-05-25 17:08:442312parcourir
<?php
/**
* @author : hanhh
* @create Date : 2013/1/6
* @name : 经纬度点集压缩
* @Version : 1.0
* tags
*/
class lonlatPress {
private $logs = array();//日志
/*压缩点的转换*/
private $lons = array();//简化的经度列表
private $lats = array();//简化的纬度列表
private $pressLonlatArr=array();//压缩后的经纬度点
/*字符串切割 变量*/
private $json_start = '';//api字符的开始
private $json_end = '';//api字符的结束
private $json_points = '';//api字符的点集
private $json_press_points = '';//压缩字符的点集
private $base = 360000000;//转换基数360万
private $log_in_count = 0;//输入的点的个数
private $log_out_count = 0;//输出的点的个数
public function __construct(){ }
/*接口返回数据的压缩方法*/
function api2press($str){
$ret = $str;
if($this->api_cut($str) && $this->pressLonLat($this->json_points)){
$ret = $this->press_points();
}
//log
$logmsg['in_count'] = $this->log_in_count;
$logmsg['out_count'] = $this->log_out_count;
$logmsg['in_json'] = count($this->json_points)>0?$this->json_points:$str;
$logmsg['out_json'] = count($this->json_press_points)>0?$this->json_press_points:$ret;
//zdebug($logmsg);
$this->__log($logmsg);
return $ret;
}
/*压缩后的经纬度点集--array*/
function lonlats(){
return array($this->lons,$this->lats,$this->pressLonlatArr);
return $this->pressLonlatArr;
}
/*压缩后的经纬度点集--json*/
function press_points(){
$press = array();
$press['lons'] = $this->lons;
$press['lats'] = $this->lats;
$press['pres'] = $this->pressLonlatArr;
$this->log_out_count = count($this->pressLonlatArr);
$this->json_press_points = json_encode($press);
$ret = $this->json_start.$this->json_press_points.$this->json_end;
//$ret = $this->json_start.'['.$this->json_press_points.']'.$this->json_end;
return $ret;
}
/*接口返回数据的切割方法*/
function api_cut($txt){
$t['in'] = $txt;
$t[] = $start_mark = '"lines":{"unit":2,"lines":[{"points":[';
$t[] = $end_mark = ']}],"previewl":';
$t[] = $mark_count = strlen($start_mark);
$t[] = $start_i_pos = strpos($txt,$start_mark);//
if ($start_i_pos === false) { return false; }
$t[] = $start_i = $start_i_pos+$mark_count-1;//自身长度 + 标志串长度-最前面的"["
$t[] = $end_i_pos = strpos($txt,$end_mark);
if ($end_i_pos === false) { return false; }
$t[] = $end_i = $end_i_pos;
$t['s'] = $this->json_start = substr($txt,0,$start_i);
$t['e'] = $this->json_end = substr($txt,$end_i+1);//最后的"]"保留
$t['p'] = $this->json_points = substr($txt,$start_i,$end_i-$start_i+1);//最后的"]"保留
//zdebug($t);
return strlen($this->json_points);
}
/* 经纬度点压缩算法 */
function pressLonLat($lonlats){
$t[] = __FUNCTION__.'-----------------------';
$arrpoints = json_decode($lonlats,true);
$this->log_in_count = count($arrpoints);
if(is_array($arrpoints)){
foreach($arrpoints as $val){
if(is_numeric($val['lon']) && is_numeric($val['lat']) ) // 这个校验经纬度的正确性
$t[] = $this->pressLonlatArr[] = $this->splitLonLat_hex_ignoreZero($val['lon'].','.$val['lat']);
//$t[] = $this->pressLonlatArr[] = $this->splitLonLat_value_36g($val['lon'].','.$val['lat']);
}
}
$t[] = __FUNCTION__.'--------------------end';
return count($this->pressLonlatArr);
}
/*
* 经纬度点压缩算法，
* 经纬度对照表中的【值】是经纬度的整数部分【array('0'=>116)】
* 经纬度的整数部分是零时忽略掉
* 输入：
* 输出：
*/
function splitLonLat_value_36g($str,$char=','){
$t[] = __FUNCTION__.'-----------------------';
$t[] =$sparr = explode($char,$str);
$t[] =$sparr[0] = $sparr[0] * $this->base;
$t[] =$sparr[1] = $sparr[1] * $this->base;
$t[] = __FUNCTION__.'--------------------end';
//zdebug($t);
return $sparr[0].','.$sparr[1];
}/*
* 经纬度点压缩算法，
* 经纬度对照表中的【值】是经纬度的整数部分【array('0'=>116)】
* 经纬度的整数部分是零时忽略掉
* 输入：
* 输出：
*/
function splitLonLat_hex_ignoreZero($str,$char=','){
$t[] = __FUNCTION__.'-----------------------';
$t[] =$sparr = explode($char,$str);
$t[] =$arrlon = $this->splitDotStr($sparr[0]);
$t[] =$arrlat = $this->splitDotStr($sparr[1]);
$hex_lon = $this->dec2x($arrlon[0]);
if(!in_array($hex_lon,$this->lons)){
$lonindex = count($this->lons);
$this->lons[] = $hex_lon;
}else{
$lonindex = array_search($hex_lon,$this->lons);
}
$hex_lat = $this->dec2x($arrlat[0]);
if(!in_array($hex_lat,$this->lats)){
$latindex = count($this->lats);
$this->lats[] = $hex_lat;
}else{
$latindex = array_search($hex_lat,$this->lats);
}
$t[] =$lon_index_hex = $this->dec2x($lonindex,36);
$t[] =$lat_index_hex = $this->dec2x($latindex,36);
$t[] =$lonindex_str = (empty($lon_index_hex)?'':$lon_index_hex.'.');
$t[] =$latindex_str = (empty($lat_index_hex)?'':$lat_index_hex.'.');
$t[] =$lon_hex = $this->dec2x($arrlon[1],36);
$t[] =$lat_hex = $this->dec2x($arrlat[1],36);
$t[] = __FUNCTION__.'--------------------end';
//zdebug($t);
return $lonindex_str.$lon_hex.','.$latindex_str.$lat_hex;
// return $lonindex_str.$arrlon[1].','.$latindex_str.$arrlat[1];
}
/*
* 经纬度点压缩算法，
* 经纬度对照表中的【值】是经纬度的整数部分【array('0'=>116)】
* 经纬度的整数部分是零时忽略掉
* 输入：
* 输出：
*/
function splitLonLat_dec_ignoreZero($str,$char=','){
$t[] = __FUNCTION__.'-----------------------';
$t[] =$sparr = explode($char,$str);
$t[] =$arrlon = $this->splitDotStr($sparr[0]);
$t[] =$arrlat = $this->splitDotStr($sparr[1]);
if(!in_array($arrlon[0],$this->lons)){
$lonindex = count($this->lons);
$this->lons[] = $arrlon[0];
}else{
$lonindex = array_search($arrlon[0],$this->lons);
}
if(!in_array($arrlat[0],$this->lats)){
$latindex = count($this->lats);
$this->lats[] = $arrlat[0];
}else{
$latindex = array_search($arrlat[0],$this->lats);
}
$t[] =$lon_index_hex = $this->dec2x($lonindex,36);
$t[] =$lat_index_hex = $this->dec2x($latindex,36);
$t[] =$lonindex_str = (empty($lon_index_hex)?'':$lon_index_hex.'.');
$t[] =$latindex_str = (empty($lat_index_hex)?'':$lat_index_hex.'.');
$t[] =$lon_hex = $this->dec2x($arrlon[1],36);
$t[] =$lat_hex = $this->dec2x($arrlat[1],36);
$t[] = __FUNCTION__.'--------------------end';
//zdebug($t);
return $lonindex_str.$lon_hex.','.$latindex_str.$lat_hex;
// return $lonindex_str.$arrlon[1].','.$latindex_str.$arrlat[1];
}
/* 经纬度点压缩算法，经纬度对照表中的【值】是经纬度的整数部分【array('0'=>116)】
* 输入：
* 输出：
*/
function splitLonLat_value($str,$char=','){
$t[] = __FUNCTION__.'-----------------------';
$t[] =$sparr = explode($char,$str);
$t[] =$arrlon = $this->splitDotStr($sparr[0]);
$t[] =$arrlat = $this->splitDotStr($sparr[1]);
if(!in_array($arrlon[0],$this->lons)){
$lonindex = count($this->lons);
$this->lons[] = $arrlon[0];
}else{
$lonindex = array_search($arrlon[0],$this->lons);
}
if(!in_array($arrlat[0],$this->lats)){
$latindex = count($this->lats);
$this->lats[] = $arrlat[0];
}else{
$latindex = array_search($arrlat[0],$this->lats);;
}
$t[] = __FUNCTION__.'--------------------end';
//zdebug($t);
return $lonindex.'.'.$arrlon[1].','.$latindex.'.'.$arrlat[1];
}
/* 经纬度点压缩算法 ，经纬度对照表中的【键】是经纬度的整数部分【array('116'=>0)】
* 输入：
* 输出：
*/
function splitLonLat_key($str,$char=','){
$t[] = __FUNCTION__.'-----------------------';
$t[] =$lon=$this->lons;
$t[] =$lat=$this->lats;
$t[] =$sparr = explode($char,$str);
$t[] =$arrlon = $this->splitDotStr($sparr[0]);
$t[] =$arrlat = $this->splitDotStr($sparr[1]);
if(!array_key_exists($arrlon[0],$this->lons)){
$lonindex = count($this->lons);
$this->lons[$arrlon[0]] = $lonindex;
}else{
$lonindex = $this->lons[$arrlon[0]];
}
if(!array_key_exists($arrlat[0],$this->lats)){
$latindex = count($this->lats);
$this->lats[$arrlat[0]] = $latindex;
}else{
$latindex = $this->lats[$arrlat[0]];
}
// //忽略 0
// $lonindex_str = (empty($lonindex)?'':$lonindex.'.');
// $latindex_str = (empty($latindex)?'':$latindex.'.');
$t[] = __FUNCTION__.'--------------------end';
//zdebug($t);
return $lonindex.'.'.$arrlon[1].','.$latindex.'.'.$arrlat[1];
// return $lonindex_str.$arrlon[1].','.$latindex_str.$arrlat[1];
}
/*分解一个由dot分开的字符串*/
function splitDotStr($str,$char='.'){
return explode($char,$str);
}
/**
*十进制转36进制 不足位数前面补零*
*
* @param $num 传入数据
* @param int $bin 转换的进制可以是：2,8,16,36
* @return 返回没有36进制的数据格式
*/
function dec2x($str){
return base_convert($str,10,36);
}
/**
*十进制转36进制 不足位数前面补零*
*
* @param $num 传入数据
* @param int $bin 转换的进制可以是：2,8,16,36
* @return 返回没有36进制的数据格式
*/
function dec2x_36_end($num,$bin=36)
{
static $arr=array(0,1,2,3,4,5,6,7,8,9,'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
$bytelen=ceil(16/$bin); //获得如果是$bin进制，一个字节的长度
$aOutChar='';
$t="";
$num=intval($num);
while($num>0){
$t=$arr[$num%$bin].$t;
$num=floor($num/$bin);
}
$tlen=strlen($t);
if($tlen%$bytelen!=0){
$pad_len=$bytelen-$tlen%$bytelen;
$t=str_pad("",$pad_len,"0",STR_PAD_LEFT).$t; //不足一个字节长度，自动前面补充0
}
$aOutChar=$t;
return $aOutChar;
}
/*lines的数据格式*/
function hanz(){
return '{"unit":2,"lines":[{"points":[{"lon":"116.4584889","lat":"39.9245522"},{"lon":"116.4595183","lat":"39.9245439"},{"lon":"116.4595247","lat":"39.9248439"},{"lon":"116.4613472","lat":"39.9248308"},{"lon":"116.4613319","lat":"39.9235872"},{"lon":"116.4618747","lat":"39.9235803"},{"lon":"116.4619008","lat":"39.9256725"},{"lon":"116.4617444","lat":"39.9264189"},{"lon":"116.4618406","lat":"39.9379361"},{"lon":"116.4618486","lat":"39.9513561"},{"lon":"116.4617794","lat":"39.9518767"},{"lon":"116.4613456","lat":"39.9528475"},{"lon":"116.4608875","lat":"39.9534075"},{"lon":"116.4600017","lat":"39.9541775"},{"lon":"116.4500842","lat":"39.9607961"},{"lon":"116.4430425","lat":"39.9654405"},{"lon":"116.4381708","lat":"39.9685919"},{"lon":"116.4374217","lat":"39.9690211"},{"lon":"116.4370264","lat":"39.9691944"},{"lon":"116.4359053","lat":"39.9695250"},{"lon":"116.4351839","lat":"39.9696439"},{"lon":"116.4342147","lat":"39.9696764"},{"lon":"116.3989278","lat":"39.9687430"},{"lon":"116.3984086","lat":"39.9688730"},{"lon":"116.3975256","lat":"39.9688364"}]}],"previewl":15}';
}
function test_data(){
return 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}
function test_not_point(){
return '{"location_lat":"39.9513561","isnavigate":1,"meetid":"1","start_lon":"116.4595183","location_lon":"116.4618586","messages":"","isenabled":1,"timeremaining":0,"end_lon":"116.4600017","success":"success","start_lat":"39.9245439","end_lat":"39.9534075"}';
}
/*lines的数据格式 */
function test_data_add($len=10){
$start = 1;
$end = ($len<1)?1:$len;
$flon = 110;
$flat = 22;
$arrs = array();
for($i=$start;$i<=$end;$i++){
if($i%400==0){
$flon++;
$flat++;
}
$tmp = str_pad($i, 4, "0", STR_PAD_LEFT);
$arrs[] = '{"n":"'.$flon.'.458'.$tmp.'","t":"'.$flat.'.924'.$tmp.'"}';
$arrs_cur[] = '{"lon":"'.$flon.'.458'.$tmp.'","lat":"'.$flat.'.924'.$tmp.'"}';
}
return '{"unit":2,"lines":[{"points":['.implode(',',$arrs_cur).']}],"previewl":15}';
}
function test_getLocation($len){
return '{"location_lat":"39.9513561","isnavigate":1,"meetid":"1","start_lon":"116.4595183","location_lon":"116.4618586","messages":"","isenabled":1,"timeremaining":0,"lines":'.$this->test_data_add($len).',"end_lon":"116.4600017","success":"success","start_lat":"39.9245439","end_lat":"39.9534075"}';
}
function test_slipt_str($len){
$t[] =$txt = $this->test_getLocation($len);
$t[] = $start_mark = '"lines":{"unit":2,"lines":[{"points":[';
$t[] = $end_mark = ']}],"previewl":';
$t[] = $mark_count = strlen($start_mark);
$t[] = $start_i = strpos($txt,$start_mark)+$mark_count-1;//自身长度 + 标志串长度-最前面的"["
$t[] = $end_i = strpos($txt,$end_mark)-$start_i+1;//最后的"]"保留
$t[] = $jsonpoints = substr($txt,$start_i,$end_i);
return $jsonpoints;
}
function test_(){ }
/**
* 记录日志.
*
* @param $logmsg unknown_type
* @param $type unknown_type
*/
protected function __log($logmsg, $type = 'debug') {
$logmsg [] = __FILE__;
zdebug($logmsg,"press",'weblog/press/'.date('Ymd_H').'.press.txt');
}
}Déclaration：
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