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我正在做一个项目，在印度的主要城市中，我有大约100000个地址（这是数据库中的表格）。我想知道是否可以获取到最近的地标（购物中心，医院和机场等）的距离。理想情况下，我希望将这些距离合并到父表中。一旦找到解决方法，我们就会有Java和Php编码器来完成它。任何指针都会有很大帮助。谢谢。
参考方案
（我可能会在这里说明显而易见的内容，但是，如果是这种情况，请忽略这些要点并继续阅读。）
一般距离
（“乌鸦飞翔”并用于限制搜索/处理负荷）
确定两个点之间的距离可以在SQL数据库/ SELECT语句中完成。
参考：MySQL Great Circle (Haversine Formula)
SELECT
acos(
cos(radians( $latitude0 ))
* cos(radians( $latitude1 ))
* cos(radians( $longitude0 ) - radians( $longitude1 ))
+ sin(radians( $latitude0 ))
* sin(radians( $latitude1 ))
)*6371 AS greatCircleDistanceKMs
FROM yourTable
如果您要比较的点的纬度/经度很可能会发生变化（即用户的地址等），或者在发生以下情况时可用于对多个文件进行更新，则可以动态使用该值：设定要用来比较的点（办公室的位置等）
如果要动态使用它，则还建议限制运行此函数的行集。
WHERE
searchLatitude BETWEEN latitude+1 AND latitude-1
AND searchLongitude BETWEEN longitude+1 and longitude-1
实质上，这将在searchLatitude / searchLongitude点周围创建一个1度的框，并减少所需的计算数量。
精确距离
最终结果
Google Directions API为您提供使用简单的HTTP请求获取两点之间实际行进距离的功能。
例如，对于“贾特拉帕蒂·希瓦吉国际机场”，URL为“泰姬陵宫殿与塔楼”：
http://maps.google.com/maps/api/directions/xml?origin=Chhatrapati+Shivaji+International+Airport&destination=Taj+Mahal+Palace+%26+Tower,+Mahakavi+Bhushan+Road,+Apollo+Bandar+Mumbai&sensor=false
这将返回以下XML响应：
<?xml version="1.0" encoding="UTF-8"?>
<DirectionsResponse>
<status>OK</status>
<route>
<summary>Western Express Hwy/NH 8</summary>
<leg>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0966100</lat>
<lng>72.8656200</lng>
</start_location>
<end_location>
<lat>19.1091100</lat>
<lng>72.8539000</lng>
</end_location>
<polyline>
<points>yxpsBcqv{LuAd@aEf@eBl@a^lQqDpBiS`PgAnAeArCoA`JiAbK</points>
<levels>B???@?@???B</levels>
</polyline>
<duration>
<value>112</value>
<text>2 mins</text>
</duration>
<html_instructions>Head <b>north</b> on <b>Sahar Rd</b> toward <b>I A Project Rd</b> <div style="font-size:0.9em">Pass by Priyadeep (on the left in 1.9&nbsp;km)</div></html_instructions>
<distance>
<value>1978</value>
<text>2.0 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.1091100</lat>
<lng>72.8539000</lng>
</start_location>
<end_location>
<lat>19.1061700</lat>
<lng>72.8538800</lng>
</end_location>
<polyline>
<points>}fssB{gt{LpHr@zCO|B_@</points>
<levels>B??B</levels>
</polyline>
<duration>
<value>52</value>
<text>1 min</text>
</duration>
<html_instructions>Turn <b>left</b> toward <b>Western Express Hwy/NH 8</b></html_instructions>
<distance>
<value>332</value>
<text>0.3 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.1061700</lat>
<lng>72.8538800</lng>
</start_location>
<end_location>
<lat>19.0991500</lat>
<lng>72.8540500</lng>
</end_location>
<polyline>
<points>qtrsBwgt{L|BAbTqCfCQrBJ|IvB</points>
<levels>B??@?B</levels>
</polyline>
<duration>
<value>82</value>
<text>1 min</text>
</duration>
<html_instructions>Continue straight onto <b>Western Express Hwy/NH 8</b> <div style="font-size:0.9em">Pass by Giriraj Ceramic Products (on the left in 750&nbsp;m)</div></html_instructions>
<distance>
<value>799</value>
<text>0.8 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0991500</lat>
<lng>72.8540500</lng>
</start_location>
<end_location>
<lat>19.0931000</lat>
<lng>72.8507700</lng>
</end_location>
<polyline>
<points>uhqsByht{LdMlDxG|AdC~@jBdAzBjB~@hAj@fA</points>
<levels>B??@???B</levels>
</polyline>
<duration>
<value>35</value>
<text>1 min</text>
</duration>
<html_instructions>Slight <b>right</b> toward <b>Western Express Hwy/NH 8</b></html_instructions>
<distance>
<value>772</value>
<text>0.8 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0931000</lat>
<lng>72.8507700</lng>
</start_location>
<end_location>
<lat>19.0507200</lat>
<lng>72.8404700</lng>
</end_location>
<polyline>
<points>{bpsBits{LjAfCr@rCbCdS`@vB\dAhAdBvBhB`Af@`Ch@bBHnAExCk@nAm@l@e@nGuF~Ay@fDaAlXcDxx@f@~UBbPPvVF|HLhXAdD\~Bn@lCxA|AbBjAdCz@nDfGfS</points>
<levels>B????@???@??@????@@?????@???@??B</levels>
</polyline>
<duration>
<value>252</value>
<text>4 mins</text>
</duration>
<html_instructions>Continue straight onto <b>Western Express Hwy/NH 8</b> <div style="font-size:0.9em">Pass by St Joseph's (on the left in 3.5&nbsp;km)</div></html_instructions>
<distance>
<value>5666</value>
<text>5.7 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0507200</lat>
<lng>72.8404700</lng>
</start_location>
<end_location>
<lat>19.0429200</lat>
<lng>72.8401400</lng>
</end_location>
<polyline>
<points>_zgsB}sq{LfBjBj@ZxB^h@XZfAN~Ab@b@l@VnJEn@MrBg@lQgH</points>
<levels>B???????@?@?B</levels>
</polyline>
<duration>
<value>54</value>
<text>1 min</text>
</duration>
<html_instructions>Exit onto <b>S V Rd</b> <div style="font-size:0.9em">Pass by Saraswati Dattatray Electricals &amp; Co., (SDEC) (on the left in 500&nbsp;m)</div></html_instructions>
<distance>
<value>1019</value>
<text>1.0 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0429200</lat>
<lng>72.8401400</lng>
</start_location>
<end_location>
<lat>19.0332800</lat>
<lng>72.8422800</lng>
</end_location>
<polyline>
<points>gifsB{qq{LXAxCcAfLsEzDiAxDs@jC[lFQtIDdFR</points>
<levels>B????@???B</levels>
</polyline>
<duration>
<value>77</value>
<text>1 min</text>
</duration>
<html_instructions>Continue onto <b>A S Gaya Marg/Lady Jamshedji Rd</b> <div style="font-size:0.9em">Pass by Dawood Khan (on the left)</div></html_instructions>
<distance>
<value>1117</value>
<text>1.1 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0332800</lat>
<lng>72.8422800</lng>
</start_location>
<end_location>
<lat>19.0249800</lat>
<lng>72.8406100</lng>
</end_location>
<polyline>
<points>_mdsBg_r{LtI^lb@pFbBXrA`@</points>
<levels>B???B</levels>
</polyline>
<duration>
<value>62</value>
<text>1 min</text>
</duration>
<html_instructions>At Emerald Surgicare (P) Ltd, continue onto <b>Lady Jamshedjee Rd</b> <div style="font-size:0.9em">Pass by Petrol Pump (on the left)</div></html_instructions>
<distance>
<value>941</value>
<text>0.9 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0249800</lat>
<lng>72.8406100</lng>
</start_location>
<end_location>
<lat>19.0217700</lat>
<lng>72.8424900</lng>
</end_location>
<polyline>
<points>cybsBytq{LvEeB~@gAlB}CXSx@SfDC</points>
<levels>B?????B</levels>
</polyline>
<duration>
<value>41</value>
<text>1 min</text>
</duration>
<html_instructions>Turn <b>left</b> at Gadkari Chowk onto <b>NC Kelkar Rd</b> <div style="font-size:0.9em">Pass by Dhyan Securities Pvt Ltd (on the right)</div></html_instructions>
<distance>
<value>432</value>
<text>0.4 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0217700</lat>
<lng>72.8424900</lng>
</start_location>
<end_location>
<lat>19.0179000</lat>
<lng>72.8475600</lng>
</end_location>
<polyline>
<points>aebsBq`r{L^c@tAm@XB^QpHeNbHoL</points>
<levels>B?????B</levels>
</polyline>
<duration>
<value>63</value>
<text>1 min</text>
</duration>
<html_instructions>At the roundabout, take the <b>1st</b> exit onto <b>Tilak Bridge</b> <div style="font-size:0.9em">Pass by Vanmali Chk (on the right)</div></html_instructions>
<distance>
<value>702</value>
<text>0.7 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0179000</lat>
<lng>72.8475600</lng>
</start_location>
<end_location>
<lat>19.0131500</lat>
<lng>72.8550800</lng>
</end_location>
<polyline>
<points>{lasBg`s{LUa@Fs@RSv@DvZ{j@</points>
<levels>B????B</levels>
</polyline>
<duration>
<value>160</value>
<text>3 mins</text>
</duration>
<html_instructions>At the roundabout, take the <b>2nd</b> exit onto <b>Tilak Rd</b> <div style="font-size:0.9em">Pass by Sargam Florists (on the left)</div></html_instructions>
<distance>
<value>987</value>
<text>1.0 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>19.0131500</lat>
<lng>72.8550800</lng>
</start_location>
<end_location>
<lat>18.9933600</lat>
<lng>72.8515000</lng>
</end_location>
<polyline>
<points>eo`sBgot{LzB`AdDr@jMv@rHVhRN`Zj@vMjB~E^zEt@lIbCdDbC</points>
<levels>B??@??@??@?B</levels>
</polyline>
<duration>
<value>233</value>
<text>4 mins</text>
</duration>
<html_instructions>Turn <b>right</b> at Shobha Hospital onto <b>Rafi Ahmed Kidwai Marg</b> <div style="font-size:0.9em">Pass by Sukkur Bhawan (on the left)</div></html_instructions>
<distance>
<value>2264</value>
<text>2.3 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>18.9933600</lat>
<lng>72.8515000</lng>
</start_location>
<end_location>
<lat>18.9675800</lat>
<lng>72.8448800</lng>
</end_location>
<polyline>
<points>os|rB{xs{L~AbBbMtOtYjb@dAn@pCr@`ZsEp[aEvJ}AzPwBzBa@nBI`E@zFz@~Ad@^T</points>
<levels>B??@?@????@????B</levels>
</polyline>
<duration>
<value>203</value>
<text>3 mins</text>
</duration>
<html_instructions>Continue onto <b>Barrister Nath Pai Marg</b> <div style="font-size:0.9em">Pass by Everest Marine Ply - J. Himatlal &amp; Co. (on the left in 1.6&nbsp;km)</div></html_instructions>
<distance>
<value>3360</value>
<text>3.4 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>18.9675800</lat>
<lng>72.8448800</lng>
</start_location>
<end_location>
<lat>18.9382900</lat>
<lng>72.8379900</lng>
</end_location>
<polyline>
<points>krwrBoor{LxCf@rBh@`Bf@nCpAnAFpAEfBSr@Y^?dk@nIdm@rJbEb@rz@xM</points>
<levels>B????????????B</levels>
</polyline>
<duration>
<value>246</value>
<text>4 mins</text>
</duration>
<html_instructions>At Our Lady of the Rosary Church, continue onto <b>P D Mello Rd</b> <div style="font-size:0.9em">Pass by Petrol Pump (on the left in 1.9&nbsp;km)</div></html_instructions>
<distance>
<value>3356</value>
<text>3.4 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>18.9382900</lat>
<lng>72.8379900</lng>
</start_location>
<end_location>
<lat>18.9344900</lat>
<lng>72.8371000</lng>
</end_location>
<polyline>
<points>i{qrBmdq{LjIlAvI|ArAD</points>
<levels>B??B</levels>
</polyline>
<duration>
<value>56</value>
<text>1 min</text>
</duration>
<html_instructions>Continue onto <b>S Bhagat Singh Marg</b> <div style="font-size:0.9em">Pass by SIB (on the left)</div></html_instructions>
<distance>
<value>433</value>
<text>0.4 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>18.9344900</lat>
<lng>72.8371000</lng>
</start_location>
<end_location>
<lat>18.9321900</lat>
<lng>72.8357900</lng>
</end_location>
<polyline>
<points>qcqrB{~p{Ll@?bDf@^RtC`DbAf@</points>
<levels>B????B</levels>
</polyline>
<duration>
<value>32</value>
<text>1 min</text>
</duration>
<html_instructions>Continue onto <b>Mint Rd</b> <div style="font-size:0.9em">Pass by Mint Police Station (on the left)</div></html_instructions>
<distance>
<value>302</value>
<text>0.3 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>18.9321900</lat>
<lng>72.8357900</lng>
</start_location>
<end_location>
<lat>18.9243200</lat>
<lng>72.8320700</lng>
</end_location>
<polyline>
<points>euprBuvp{LdIj@XNhAxArA`ApHfCtDX`C@lA\r@n@fAvCf@f@j@LNR?XnC`@</points>
<levels>B???????@??????B</levels>
</polyline>
<duration>
<value>97</value>
<text>2 mins</text>
</duration>
<html_instructions>Continue onto <b>Shahid Bhagat Singh Rd/Shahid Bhagat SIngh Marg</b> <div style="font-size:0.9em">Go through 1 roundabout</div><div style="font-size:0.9em">Pass by Town Hall (on the left)</div></html_instructions>
<distance>
<value>1022</value>
<text>1.0 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>18.9243200</lat>
<lng>72.8320700</lng>
</start_location>
<end_location>
<lat>18.9230100</lat>
<lng>72.8334800</lng>
</end_location>
<polyline>
<points>_dorBm_p{LvFmERa@Ei@</points>
<levels>B??B</levels>
</polyline>
<duration>
<value>30</value>
<text>1 min</text>
</duration>
<html_instructions>Turn <b>left</b> at CBI onto <b>Mahakavi Bhushan Rd/Rajkavi Ghushan Marg</b> <div style="font-size:0.9em">Pass by Kalajot Hospital (on the right)</div></html_instructions>
<distance>
<value>220</value>
<text>0.2 km</text>
</distance>
</step>
<step>
<travel_mode>DRIVING</travel_mode>
<start_location>
<lat>18.9230100</lat>
<lng>72.8334800</lng>
</start_location>
<end_location>
<lat>18.9219500</lat>
<lng>72.8335500</lng>
</end_location>
<polyline>
<points>y{nrBghp{LdA_@t@KvA\</points>
<levels>B??B</levels>
</polyline>
<duration>
<value>46</value>
<text>1 min</text>
</duration>
<html_instructions>Turn <b>right</b> at Mumbai Hotels Booking onto <b>Appolo Bunder/P J Ramchandani Marg</b> <div style="font-size:0.9em">Destination will be on the right</div></html_instructions>
<distance>
<value>124</value>
<text>0.1 km</text>
</distance>
</step>
<duration>
<value>1933</value>
<text>32 mins</text>
</duration>
<distance>
<value>25826</value>
<text>25.8 km</text>
</distance>
<start_location>
<lat>19.0966100</lat>
<lng>72.8656200</lng>
</start_location>
<end_location>
<lat>18.9219500</lat>
<lng>72.8335500</lng>
</end_location>
<start_address>Chhatrapati Shivaji International Airport, Vile Parle East, Mumbai, Maharashtra, India</start_address>
<end_address>Taj Mahal Palace & Tower, P J Ramchandani Marg, Apollo Bandar, Mumbai, Maharashtra 400001, India</end_address>
</leg>
<overview_polyline>
<points>yxpsBcqv{LuAd@aEf@eBl@a^lQqDpBiS`PgAnAeArCoA`JiAbKpHr@nAChEk@|BAbTqCfCQl@@dAHhE`AbJhCxQvEfDdBzBjB~@hAvBnEr@rCbCdS`@vBh@xA|@pAvBhB`Af@`Ch@bBHnAExCk@nAm@l@e@nGuF~Ay@fDaAlXcDxx@f@~UBbPPvVF|HLhWClDX|Bh@fDdBz@x@l@z@~@rBz@nDfGfSfBjBj@ZxB^h@XZfAN~Ab@b@l@VnJErAYnA[vEgBPObJoDXAxCcAfLsEzDiAdB]vGw@jIM~DFzPr@lb@pFbBXrA`@vEeB~@gAlB}CXSx@SfDC^c@tAm@XB^QpHeNbHoLUa@Fs@RSv@DvZ{j@zB`AdDr@jMv@rHVhRN`Zj@vMjB`DRnFt@vJnChCfBjAhArNjQtYjb@dAn@pCr@`ZsEp[aEvJ}AzPwBzBa@nBI`E@zFz@~Ad@^TxCf@rBh@`Bf@nCpAnAFpAEfBSr@Y^?dk@nIdm@rJbEb@b\bFnWhEjOxBvI|A`CDbDf@^RtC`DbAf@dIj@XNhAxAzBxAhGnBtDX`C@lA\r@n@fAvCf@f@j@LNR?XnC`@vFmERa@Ei@dA_@t@KvA\</points>
<levels>B???@?@???A??????@???@???@???@???A??@????@@?????@???@???@???????@?@?????????@??@??A???@?????@??????A??@??@???@?????@??????@??????@????@????????@??????@???@?????@??????B</levels>
</overview_polyline>
</route>
</DirectionsResponse>
包含整个旅程细节的元素是：
DirectionsResponse>路线>距离>值
以基本单位表示的完整行程的距离
DirectionsResponse>路线>距离>文字
以简单的英语形式表示的完整旅程的距离
DirectionsResponse>路线>持续时间>值
整个行程的估计行程时间（以基本单位（秒）为单位）
DirectionsResponse>路线>持续时间>文字
完整行程的估计旅行时间，用简单的英语形式
然后，您可以使用PHP DOMDocument CLASS解析结果并提取这些详细信息。
注意：在Google Directions API页面上，“每天使用Google Directions API的查询限制为2500个路线请求。单个路线请求中最多可以包含8个中间航路点。GoogleMaps Premier客户最多可以查询每天有100,000个路线请求，每个请求中最多允许23个航路点。”
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合并List <T>和List <Optional <T >> - java鉴于： List<Integer> integers = new ArrayList<>(Arrays.asList( 10, 12 )); List<Optional<Integer>> optionalIntegers = Arrays.asList( Optional.of(5), Optional.em…
实例化类型<？>的泛型类 - java我正在为SCJP / OCPJP学习，并且遇到了一个对我来说很奇怪的示例问题。该示例代码实例化了两个通用集合：List<?> list = new ArrayList<?>(); List<? extends Object> list2 = new ArrayList<? extends Object>(); …
List <Dog>是List <Animal>的子类吗？为什么Java泛型不是隐式多态的？ - java我对Java泛型如何处理继承/多态感到困惑。假设以下层次结构-动物（父母）狗-猫（儿童）因此，假设我有一个方法doSomething(List<Animal> animals)。根据继承和多态性的所有规则，我假设List<Dog>是List<Animal>，而List<Cat>是List<Animal&g…