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【
PHP
】
压缩路线规划中的经纬度点集
作者:
seared2008
/ 发布于
2013/1/8
/
767
压缩路线规划中的经纬度点集 标准的经纬度点集，有规律可循，可以压缩，以便网络传输，减少流量。
<?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 $aOutChar; } /*韩峥提供的lines的数据格式*/ function hanz(){ return '{"unit":2,"lines":[{"points":[{"lon":"116.4584889","lat":"39.9245522"},{"lon":"116.4595183","lat":"39.9245439"},{"lon":"116.4595247","lat":"39.9248439"},{"lon":"116.4613472","lat":"39.9248308"},{"lon":"116.4613319","lat":"39.9235872"},{"lon":"116.4618747","lat":"39.9235803"},{"lon":"116.4619008","lat":"39.9256725"},{"lon":"116.4617444","lat":"39.9264189"},{"lon":"116.4618406","lat":"39.9379361"},{"lon":"116.4618486","lat":"39.9513561"},{"lon":"116.4617794","lat":"39.9518767"},{"lon":"116.4613456","lat":"39.9528475"},{"lon":"116.4608875","lat":"39.9534075"},{"lon":"116.4600017","lat":"39.9541775"},{"lon":"116.4500842","lat":"39.9607961"},{"lon":"116.4430425","lat":"39.9654405"},{"lon":"116.4381708","lat":"39.9685919"},{"lon":"116.4374217","lat":"39.9690211"},{"lon":"116.4370264","lat":"39.9691944"},{"lon":"116.4359053","lat":"39.9695250"},{"lon":"116.4351839","lat":"39.9696439"},{"lon":"116.4342147","lat":"39.9696764"},{"lon":"116.3989278","lat":"39.9687430"},{"lon":"116.3984086","lat":"39.9688730"},{"lon":"116.3975256","lat":"39.9688364"}]}],"previewl":15}'; } function test_data(){ return 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} function test_not_point(){ return '{"location_lat":"39.9513561","isnavigate":1,"meetid":"1","start_lon":"116.4595183","location_lon":"116.4618586","messages":"","isenabled":1,"timeremaining":0,"end_lon":"116.4600017","success":"success","start_lat":"39.9245439","end_lat":"39.9534075"}'; } /*韩峥提供的lines的数据格式 */ function test_data_add($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'); } }
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