Redis自3.2版本开端新增对GEO(天文地位)的支持,然而地球没有是一个完满的球体,正在最坏的状况下的误差多是0.5%。靠近南北极的区域是没有支持的,支持坐标的无效的经度从-180度到180度;无效的纬度从-85.05112878度到85.05112878度,凌驾范畴将会报错。
我喜爱登山,学习GEO的时分我也以山的坐标做演示,我的坐标是:
116.517159,39.922267
我整顿了一些山的坐标
$mountainCoordinates = array( array('115.793844', '40.584459', 'Hai_tuo'),//海陀山坐标 array('115.056232', '39.948933', 'Small_wutai'),//小五台山坐标 array('114.173822', '27.474563', 'Wu_gong'),//文治山坐标 array('111.341648', '25.518178', 'Leek_ridge'),//韭菜岭坐标 array('103.901761', '31.60487', 'Jiu_ding'),//九顶山坐标 array('107.398009', '34.057777', 'Ao_Shan'),//鳌山坐标 );
1.向mountainCoordinates的key里添加坐标
try { $redis = new Redis(); $redis->connect('192.168.75.132', 6379); foreach ($mountainCoordinates as $coordinates){ $param = array('geoadd', 'mountainCoordinates'); $param = array_merge($param, $coordinates); $ret = call_user_func_array(array($redis, 'rawCo妹妹and'), $param); print_r($ret); } } catch (Exception $e){ echo $e->getMessage(); }
执行后果
int(1) int(1) int(1) int(1) int(1) int(1)
2.猎取坐标
try { $redis = new Redis(); $redis->connect('192.168.75.132', 6379); $param = array('geopos', 'mountainCoordinates', 'Hai_tuo', 'Wu_gong', 'Jiu_ding'); $ret = call_user_func_array(array($redis, 'rawCo妹妹and'), $param); print_r($ret); } catch (Exception $e){ echo $e->getMessage(); }
执行后果
Array ( [0] => Array ( [0] => 115.79384654760360718 [1] => 40.58445845049069334 ) [1] => Array ( [0] => 114.1738244891166687 [1] => 27.47456377424472151 ) [2] => Array ( [0] => 103.90176326036453247 [1] => 31.60486909089710394 ) )
3.较量争论两个坐标间间隔
try { $redis = new Redis(); $redis->connect('192.168.75.132', 6379); $param = array('geodist', 'mountainCoordinates', 'Hai_tuo', 'Small_wutai', 'km'); $ret = call_user_func_array(array($redis, 'rawCo妹妹and'), $param); var_dump($ret); } catch (Exception $e){ echo $e->getMessage(); }
执行后果:海陀山以及小五台山之间间隔是94.4219km
string(7) "94.4219"
4.以我的坐标为原点,按半径100km取坐标(找出离我100千米之内的山)
try { $redis = new Redis(); $redis->connect('192.168.75.132', 6379); $param = array('georadius', 'mountainCoordinates', '116.517159', '39.922267', '100', 'km', 'WITHDIST', 'WITHCOORD'); $ret = call_user_func_array(array($redis, 'rawCo妹妹and'), $param); print_r($ret); } catch (Exception $e){ echo $e->getMessage(); }
执行后果:只有海陀山,离我95.8884km
Array ( [0] => Array ( [0] => Hai_tuo [1] => 95.8884 [2] => Array ( [0] => 115.79384654760360718 [1] => 40.58445845049069334 ) ) )
5.以我的坐标为原点,按半径1500km取坐标(找出离我1500千米之内的山)
try { $redis = new Redis(); $redis->connect('192.168.75.132', 6379); $param = array('georadius', 'mountainCoordinates', '116.517159', '39.922267', '1500', 'km', 'WITHDIST', 'WITHCOORD'); $ret = call_user_func_array(array($redis, 'rawCo妹妹and'), $param); print_r($ret); } catch (Exception $e){ echo $e->getMessage(); }
执行后果:找出了5座山
Array ( [0] => Array ( [0] => Jiu_ding [1] => 1464.4350 [2] => Array ( [0] => 103.90176326036453247 [1] => 31.60486909089710394 ) ) [1] => Array ( [0] => Ao_Shan [1] => 1039.1217 [2] => Array ( [0] => 107.3980066180229187 [1] => 34.05777705537607147 ) ) [2] => Array ( [0] => Wu_gong [1] => 1401.2353 [2] => Array ( [0] => 114.1738244891166687 [1] => 27.47456377424472151 ) ) [3] => Array ( [0] => Small_wutai [1] => 124.6283 [2] => Array ( [0] => 115.05623370409011841 [1] => 39.94893288365195616 ) ) [4] => Array ( [0] => Hai_tuo [1] => 95.8884 [2] => Array ( [0] => 115.79384654760360718 [1] => 40.58445845049069334 ) ) )
6.以小五台山的坐标为原点,按半径1000km取坐标(找出离小五台山1000千米之内的山)
try { $redis = new Redis(); $redis->connect('192.168.75.132', 6379); $param = array('georadiusbymember', 'mountainCoordinates', 'Small_wutai', '1000', 'km', 'WITHDIST', 'WITHCOORD'); $ret = call_user_func_array(array($redis, 'rawCo妹妹and'), $param); print_r($ret); } catch (Exception $e){ echo $e->getMessage(); }
执行后果:扫除小五台本人,找到了鳌山以及海陀山
Array ( [0] => Array ( [0] => Small_wutai [1] => 0.0000 [2] => Array ( [0] => 115.05623370409011841 [1] => 39.94893288365195616 ) ) [1] => Array ( [0] => Hai_tuo [1] => 94.4219 [2] => Array ( [0] => 115.79384654760360718 [1] => 40.58445845049069334 ) ) [2] => Array ( [0] => Ao_Shan [1] => 943.7873 [2] => Array ( [0] => 107.3980066180229187 [1] => 34.05777705537607147 ) ) )
以上就是PHP应用Redis的GEO(天文地位)饬令的具体内容,更多请存眷资源魔其它相干文章!
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