{"id":152,"date":"2013-04-01T16:37:43","date_gmt":"2013-04-01T08:37:43","guid":{"rendered":"https:\/\/fengxinwei.com\/?p=152"},"modified":"2024-10-23T21:24:20","modified_gmt":"2024-10-23T13:24:20","slug":"%e3%80%90%e7%ae%97%e6%b3%95%e3%80%91%e7%bb%8f%e7%ba%ac%e5%ba%a6%e5%b8%b8%e7%94%a8%e8%ae%a1%e7%ae%97","status":"publish","type":"post","link":"https:\/\/fengxinwei.com\/?p=152","title":{"rendered":"\u3010\u7b97\u6cd5\u3011\u7ecf\u7eac\u5ea6\u5e38\u7528\u8ba1\u7b97"},"content":{"rendered":"

\u6700\u8fd1\u5de5\u4f5c\u4e2d\u9047\u5230\u7ecf\u7eac\u5ea6\u641c\u7d22\u7684\u9700\u6c42\uff0c\u521d\u6b65\u60f3\u6cd5\u662f\u8ba1\u7b97\u6240\u6709\u76ee\u6807\u57ce\u5e02\u8ddd\u8be5\u70b9\u7684\u8ddd\u79bb\uff0c\u7136\u540e\u8fdb\u884c\u7b5b\u9009\uff0c\u4f46\u5934\u75bc\u7684\u662f\uff0c\u6ca1\u6709\u6240\u6709\u4ea7\u54c1\u7684\u7f13\u5b58\uff0c\u8ba1\u7b97\u8ddd\u79bb\u7684\u64cd\u4f5c\u53ea\u80fd\u653e\u5230DB\u7aef\uff0c\u8fd9\u6837\u662f\u4e0d\u53ef\u63a5\u53d7\u7684\uff1b\u6240\u4ee5\u6253\u7b97\u5148\u5c06\u6240\u6709\u4ea7\u54c1\u653e\u5230\u7f13\u5b58\u4e2d\uff0c\u518d\u8fdb\u884c\u8ba1\u7b97\u3002\u53ef\u8fd9\u4e48\u505a\u7684\u8bdd\uff0c\u4e00\u65b9\u9762\u6539\u9020\u5de5\u65f6\u6bd4\u8f83\u957f\uff0c\u53e6\u4e00\u65b9\u9762\u76ee\u524d\u7684\u7f13\u5b58\u7cfb\u7edf\u4e0d\u662f\u5f88\u7a33\u5b9a\uff0c\u51e0\u756a\u601d\u8003\u5f81\u5f97\u4ea7\u54c1\u7ecf\u7406\u540c\u610f\u540e\u5f97\u51fa\u4e00\u4e2a\u4e0d\u7cbe\u786e\u7684\u65b9\u5f62\u641c\u7d22\u65b9\u6848\u3002<\/p>\n

\u5373\u4ee5\u76ee\u6807\u70b9\u4e3a\u4e2d\u5fc3\uff0c\u753b\u4e00\u4e2a\u6b63\u65b9\u578b\uff0c\u5728\u5e94\u7528\u7aef\u6839\u636e\u76ee\u6807\u70b9\u7ecf\u7eac\u5ea6\u3001\u8303\u56f4\u8ddd\u79bb\u3001\u89d2\u5ea6\u7b97\u51fa\u6b63\u65b9\u578b\u5de6\u4e0b\u70b9\u548c\u53f3\u4e0a\u70b9\u7684\u7ecf\u7eac\u5ea6\uff0c\u7136\u540e\u4ee5\u6b64\u53bbDB\u91ccbetween\u3002\u6069\uff0c\u5728\u8981\u6c42\u4e0d\u7cbe\u786e\u4e14\u6ca1\u6709\u7f13\u5b58\u7684\u60c5\u51b5\u4e0b\u8fd9\u662f\u4e00\u4e2a\u8f83\u597d\u7684\u6298\u4e2d\u65b9\u6848\u3002<\/p>\n

\u4e8e\u662f\u63a5\u4e0b\u6765\u5c31\u5f00\u59cb\u8003\u8651\u7b97\u6cd5\uff0c\u53c2\u8003\u4e86\u535a\u5ba2\u56ed\u7684\u5e16\u5b50\uff08http:\/\/www.cnblogs.com\/hellofox2000\/archive\/2010\/07\/13\/1776159.html#2042746<\/a>\uff09\uff0c\u8bd5\u9a8c\u540e\u53d1\u73b0\u8ba1\u7b97\u4e24\u70b9\u95f4\u8ddd\u79bb\u7684\u65b9\u6cd5\u504f\u5dee\u6709\u70b9\u5927\uff0c\u4e8e\u662f\u5bf9\u5176\u505a\u4e86\u4e00\u4e9b\u4fee\u6539\uff0c\u4f5c\u4e3a\u5de5\u5177\u7c7b\u6536\u85cf\u8d77\u6765\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

\u5b9e\u4f53\u7c7b\uff1a\n\t \t\n

\n
using<\/span> System;\n<\/span>using<\/span> System.Collections.Generic;\n<\/span>using<\/span> System.Linq;\n<\/span>using<\/span> System.Text;\n\n<\/span>namespace<\/span> Xinwei.Test.Geography\n{\n    <\/span>public<\/span> class<\/span> GeographicPoint\n    {\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u8d64\u9053\u534a\u5f84\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        public<\/span> const<\/span> double<\/span> EARTH_RADIUS = 6378137<\/span>;\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u6781\u534a\u5f84\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        public<\/span> const<\/span> double<\/span> POLAR_RADIUS = 6356725<\/span>;\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \n        \/\/\/<\/span> <\/summary><\/span>\n        public<\/span> GeographicPoint()\n        { }\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u6784\u9020\u51fd\u6570\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        \/\/\/<\/span> <param name=\"lat\"><\/span>\u7ef4\u5ea6<\/span><\/param><\/span>\n        \/\/\/<\/span> <param name=\"lon\"><\/span>\u7ecf\u5ea6<\/span><\/param><\/span>\n        public<\/span> GeographicPoint(double<\/span> lat, double<\/span> lon)\n        {\n            <\/span>this<\/span>.Latitude = lat;\n            <\/span>this<\/span>.Longitude = lon;\n        }\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u7eac\u5ea6\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        public<\/span> double<\/span> Latitude\n        { <\/span>get<\/span>; set<\/span>; }\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u7ecf\u5ea6\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        public<\/span> double<\/span> Longitude\n        { <\/span>get<\/span>; set<\/span>; }\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u7eac\u5ea6\u7684\u5f27\u5ea6\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        public<\/span> double<\/span> RadianOfLatitude\n        {\n            <\/span>get<\/span>\n            {\n                <\/span>return<\/span> Latitude * Math.PI \/ 180<\/span>;\n            }\n        }\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u7ecf\u5ea6\u7684\u5f27\u5ea6\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        public<\/span> double<\/span> RadianOfLongitude\n        {\n            <\/span>get<\/span>\n            {\n                <\/span>return<\/span> Longitude * Math.PI \/ 180<\/span>;\n            }\n        }\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u6682\u65f6\u4e0d\u77e5\u610f\u4e49\uff0c\u8bf7\u5927\u795e\u4eec\u5e2e\u52a9\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        public<\/span> double<\/span> Ec\n        {\n            <\/span>get<\/span>\n            {\n                <\/span>return<\/span> POLAR_RADIUS + (EARTH_RADIUS - POLAR_RADIUS) * (90<\/span> - Latitude) \/ 90<\/span>;\n            }\n        }\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u6682\u65f6\u4e0d\u77e5\u610f\u4e49\uff0c\u8bf7\u5927\u795e\u4eec\u5e2e\u52a9\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        public<\/span> double<\/span> Ed\n        {\n            <\/span>get<\/span>\n            {\n                <\/span>return<\/span> Ec * Math.Cos(RadianOfLatitude);\n            }\n        }\n    }\n}<\/span><\/pre>\n<\/div>\n
\u8ba1\u7b97\u7c7b\uff1a<\/p>\n
\n
using<\/span> System;\n<\/span>using<\/span> System.Collections.Generic;\n<\/span>using<\/span> System.Linq;\n<\/span>using<\/span> System.Text;\n\n<\/span>namespace<\/span> Xinwei.Test.Geography\n{\n    <\/span>public<\/span> static<\/span> class<\/span> GeographyHelper\n    {\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u6839\u636e\u4e24\u70b9\u7684\u7ecf\u7eac\u5ea6\u8ba1\u7b97\u4e24\u70b9\u8ddd\u79bb\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        \/\/\/<\/span> <param name=\"sourcePoint\"><\/span>A\u70b9\u7ef4\u5ea6<\/span><\/param><\/span>        \n        \/\/\/<\/span> <param name=\"destinationPoint\"><\/span>B\u70b9\u7ecf\u5ea6<\/span><\/param><\/span>\n        \/\/\/<\/span> <returns><\/returns><\/span>\n        public<\/span> static<\/span> double<\/span> GetDistance(GeographicPoint sourcePoint, GeographicPoint destinationPoint)\n        {\n            <\/span>if<\/span> (Math.Abs(sourcePoint.Latitude) > 90<\/span> || Math.Abs(destinationPoint.Latitude) > 90<\/span> || Math.Abs(sourcePoint.Longitude) > 180<\/span> || Math.Abs(destinationPoint.Longitude) > 180<\/span>)\n                <\/span>throw<\/span> new<\/span> ArgumentException(\"<\/span>\u7ecf\u7eac\u5ea6\u4fe1\u606f\u4e0d\u6b63\u786e\uff01<\/span>\"<\/span>);\n\n            <\/span>double<\/span> distance = GeographicPoint.EARTH_RADIUS \/ 1000<\/span> * Math.Acos(Math.Cos(sourcePoint.RadianOfLatitude)\n                <\/span>* Math.Cos(destinationPoint.RadianOfLatitude) * Math.Cos(destinationPoint.RadianOfLongitude - sourcePoint.RadianOfLongitude)\n                <\/span>+ Math.Sin(sourcePoint.RadianOfLatitude) * Math.Sin(destinationPoint.RadianOfLatitude));\n\n            <\/span>return<\/span> distance;\n        }\n\n        <\/span>\/\/\/<\/span> <summary><\/span>\n        \/\/\/<\/span> \u5df2\u77e5\u70b9A\u7ecf\u7eac\u5ea6\uff0c\u6839\u636eB\u70b9\u636eA\u70b9\u7684\u8ddd\u79bb\uff0c\u548c\u65b9\u4f4d\uff0c\u6c42B\u70b9\u7684\u7ecf\u7eac\u5ea6\n        <\/span>\/\/\/<\/span> <\/summary><\/span>\n        \/\/\/<\/span> <param name=\"sourcePoint\"><\/span>\u5df2\u77e5\u70b9A<\/span><\/param><\/span>\n        \/\/\/<\/span> <param name=\"distance\"><\/span>B\u70b9\u5230A\u70b9\u7684\u8ddd\u79bb <\/span><\/param><\/span>\n        \/\/\/<\/span> <param name=\"angle\"><\/span>B\u70b9\u76f8\u5bf9\u4e8eA\u70b9\u7684\u65b9\u4f4d\uff0c12\u70b9\u949f\u65b9\u5411\u4e3a\u96f6\u5ea6\uff0c\u89d2\u5ea6\u987a\u65f6\u9488\u589e\u52a0<\/span><\/param><\/span>\n        \/\/\/<\/span> <returns><\/span>B\u70b9\u7684\u7ecf\u7eac\u5ea6\u5750\u6807<\/span><\/returns><\/span>\n        public<\/span> static<\/span> GeographicPoint GetGeographicPoint(GeographicPoint sourcePoint, double<\/span> distance, double<\/span> angle)\n        {\n            <\/span>double<\/span> dx = distance * 1000<\/span> * Math.Sin(angle * Math.PI \/ 180<\/span>);\n            <\/span>double<\/span> dy = distance * 1000<\/span> * Math.Cos(angle * Math.PI \/ 180<\/span>);\n\n            <\/span>double<\/span> longitude = (dx \/ sourcePoint.Ed + sourcePoint.RadianOfLongitude) * 180<\/span> \/ Math.PI;\n            <\/span>double<\/span> latitude = (dy \/ sourcePoint.Ec + sourcePoint.RadianOfLatitude) * 180<\/span> \/ Math.PI;\n\n            GeographicPoint destinationPoint <\/span>= new<\/span> GeographicPoint(latitude, longitude);\n            <\/span>return<\/span> destinationPoint;\n        }\n    }\n}<\/span><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u6700\u8fd1\u5de5\u4f5c\u4e2d\u9047\u5230\u7ecf\u7eac\u5ea6\u641c\u7d22\u7684\u9700\u6c42\uff0c\u521d\u6b65\u60f3\u6cd5\u662f\u8ba1\u7b97\u6240\u6709\u76ee\u6807\u57ce\u5e02\u8ddd\u8be5\u70b9\u7684\u8ddd\u79bb\uff0c\u7136\u540e\u8fdb\u884c\u7b5b\u9009\uff0c\u4f46\u5934\u75bc\u7684\u662f\uff0c\u6ca1\u6709\u6240\u6709\u4ea7\u54c1 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[33,35],"class_list":["post-152","post","type-post","status-publish","format-standard","hentry","category-technology","tag-33","tag-35"],"_links":{"self":[{"href":"https:\/\/fengxinwei.com\/index.php?rest_route=\/wp\/v2\/posts\/152","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fengxinwei.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fengxinwei.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fengxinwei.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fengxinwei.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=152"}],"version-history":[{"count":1,"href":"https:\/\/fengxinwei.com\/index.php?rest_route=\/wp\/v2\/posts\/152\/revisions"}],"predecessor-version":[{"id":385,"href":"https:\/\/fengxinwei.com\/index.php?rest_route=\/wp\/v2\/posts\/152\/revisions\/385"}],"wp:attachment":[{"href":"https:\/\/fengxinwei.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=152"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fengxinwei.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=152"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fengxinwei.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}