使用百度地图API解决区县级以下行政区划轮廓问题

技术开发地图
Baidu Map

我们在项目开发中经常会遇到在地图上显示区划轮廓的情况，所幸现在各大地图服务商都提供了获取区划边界（县区以上）的功能（有时候边界不准，但总比没有强），例如百度提供的显示区划的边界。
百度地图demo例子： http://lbsyun.baidu.com/jsdemo.htm#c1_10

以及基于高德地图的区划显示：
http://webapi.amap.com/ui/1.0/ui/geo/DistrictExplorer/examples/index.html?guide=1

但是改功能只能展示区级及以上范围行政区划。

研究了一下百度地图行政区划的实现方式，其实就是存储了行政区划的边界点集合，显示时候其实是显示的点的多边形的集合。

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function getBoundary(){       
		var bdary = new BMap.Boundary();
		bdary.get("北京市海淀区", function(rs){       //获取行政区域
			map.clearOverlays();        //清除地图覆盖物       
			var count = rs.boundaries.length; //行政区域的点有多少个
			if (count === 0) {
				alert('未能获取当前输入行政区域');
				return ;
			}
          	var pointArray = [];
			for (var i = 0; i < count; i++) {
				var ply = new BMap.Polygon(rs.boundaries[i], {strokeWeight: 2, strokeColor: "#ff0000"}); //建立多边形覆盖物
				map.addOverlay(ply);  //添加覆盖物
				pointArray = pointArray.concat(ply.getPath());
			}    
			map.setViewport(pointArray);    //调整视野  
			addlabel();               
		});   
	}

那我们自己也可以按照这个逻辑来实现乡镇行政区划的展示，那现在的问题就是如何来获取行政区边界的点集,从百度地图api V1.1版本，polygon类提供了enableEditing()功能，我们可以在地图上拖动编辑边界点，然后，再通过polygon类提供的getPath()方法返回边界点数组，将我们自己编辑过的边界点数组存储起来，就实现了行政区划的数字化工作。

整体实现见文件：
地图经纬度描点工具

关键代码：

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# 显示所有区划
function showMyArea() {
        var areas = [];
        //铁西区
        var siping_tiexiqu = "124.394261,43.200225;124.363162,43.14644;124.359246,43.131221;124.342686,43.13835;124.327579,43.153527;124.299905,43.163609;124.292776,43.176343;124.281179,43.184908;124.286515,43.199605;124.2953,43.209288;124.28495,43.235119;124.301071,43.234313;124.30711,43.23646;124.309022,43.250198;124.313187,43.255563;124.320604,43.254237;124.328298,43.256463;124.332289,43.255015;124.335821,43.24598;124.349095,43.244098;124.356816,43.248521;124.369427,43.248006;124.374714,43.243444;124.390598,43.244364;124.399349,43.239998;124.410266,43.243724;124.415474,43.238964;124.425377,43.239837;124.423989,43.235824;124.42865,43.236023;124.43232,43.232498;124.438555,43.233977;124.438702,43.228258;124.452916,43.225358;124.446783,43.218094;124.435393,43.215793;124.423932,43.203086;124.403633,43.203134;124.394261,43.200225";
//    var siping_lishu = "124.717877,43.184866;124.66483,43.180224;124.643888,43.1635;124.634191,43.151678;124.628805,43.15007;124.61549,43.165761;124.599496,43.167858;124.578632,43.183615;124.572448,43.184601;124.569519,43.182571;124.571261,43.188129;124.531548,43.186809;124.525446,43.196129;124.494772,43.206798;124.488282,43.215329;124.476199,43.222616;124.438702,43.228258;124.438555,43.233977;124.43232,43.232498;124.42865,43.236023;124.423989,43.235824;124.425377,43.239837;124.415474,43.238964;124.410266,43.243724;124.399349,43.239998;124.390598,43.244364;124.374714,43.243444;124.369427,43.248006;124.356816,43.248521;124.349095,43.244098;124.340037,43.245237;124.335821,43.24598;124.331431,43.255935;124.320604,43.254237;124.314992,43.256494;124.309022,43.250198;124.30853,43.237342;124.294073,43.234175;124.283577,43.235176;124.28107,43.239702;124.269164,43.237759;124.266655,43.245038;124.259782,43.238071;124.257449,43.24366;124.251762,43.243022;124.249587,43.239765;124.241543,43.242631;124.235055,43.241337;124.231932,43.248111;124.225847,43.247806;124.229393,43.251877;124.22312,43.252848;124.222754,43.262281;124.208845,43.25729;124.205514,43.252726;124.201234,43.253584;124.198692,43.24972;124.195014,43.252969;124.184336,43.249269;124.183183,43.25468;124.179313,43.255896;124.175818,43.250119;124.164593,43.257501;124.157209,43.254853;124.147483,43.258949;124.134178,43.254178;124.121673,43.255854;124.119411,43.2828;124.108225,43.299548;124.051683,43.295149;124.041668,43.289664;124.03353,43.289105;124.007062,43.311549;124.001684,43.312088;123.956243,43.356327;123.941881,43.359869;123.928481,43.366864;123.904879,43.363339;123.899711,43.377361;123.907784,43.386242;123.902929,43.392938;123.897976,43.396915;123.877266,43.40022;123.853355,43.425646;123.875252,43.444157;123.872991,43.459346;123.847204,43.476725;123.837107,43.474812;123.799451,43.498242;123.791182,43.483941;123.784907,43.483314;123.772711,43.495354;123.778534,43.513874;123.784022,43.516719;123.785764,43.522433;123.792631,43.522182;123.798089,43.525946;123.799205,43.542823;123.809716,43.552573;123.830938,43.55756;123.842469,43.55425;123.852855,43.557246;123.868418,43.555772;123.886379,43.56175;123.890321,43.565408;123.892139,43.586177;123.899506,43.590187;123.900722,43.594354;123.910263,43.597505;123.927287,43.597878;123.931247,43.604624;123.936321,43.601905;123.944076,43.602656;123.952315,43.619391;123.96463,43.620919;123.976669,43.63034;123.985999,43.628109;123.987383,43.632232;123.997123,43.635666;124.003678,43.650564;124.015595,43.649861;124.02115,43.662984;124.033997,43.665187;124.045211,43.662798;124.055615,43.667878;124.067245,43.693561;124.084376,43.70277;124.105542,43.707627;124.10714,43.714171;124.115462,43.711159;124.141787,43.715909;124.136447,43.710529;124.151598,43.709754;124.155335,43.713911;124.181124,43.713578;124.183484,43.719179;124.195015,43.718619;124.204286,43.736224;124.210587,43.7382;124.211798,43.748612;124.219898,43.751659;124.214398,43.761009;124.224091,43.764159;124.293399,43.768221;124.363848,43.776467;124.408229,43.767412;124.417658,43.770994;124.415863,43.766106;124.435428,43.762663;124.465599,43.765999;124.468391,43.768789;124.487087,43.756202;124.489668,43.758576;124.503633,43.754509;124.536092,43.759688;124.541466,43.752034;124.55246,43.749835;124.560309,43.737036;124.581525,43.727615;124.605665,43.695414;124.63191,43.687309;124.669728,43.666632;124.685555,43.634384;124.681797,43.610145;124.68706,43.595558;124.697827,43.582857;124.698733,43.560558;124.691779,43.5354;124.681796,43.520622;124.683705,43.512157;124.716562,43.448648;124.735872,43.428534;124.744233,43.400559;124.763803,43.386218;124.762479,43.372668;124.768286,43.361576;124.766678,43.354669;124.773502,43.350665;124.780015,43.332178;124.771381,43.320117;124.773549,43.314083;124.766845,43.311227;124.761519,43.303088;124.76599,43.284148;124.779824,43.279007;124.789961,43.262506;124.806291,43.249429;124.804008,43.245594;124.780772,43.238268;124.789005,43.225899;124.785969,43.220874;124.781806,43.221451;124.766526,43.214592;124.749493,43.214538;124.742382,43.211513;124.731807,43.203054;124.722254,43.187024;124.717877,43.184866";
        var siping_shuangliao = "124.042873,43.790715;124.051277,43.786682;124.052739,43.778252;124.058225,43.772763;124.077469,43.763807;124.088468,43.748916;124.080787,43.7408;124.08685,43.736531;124.081597,43.725383;124.085757,43.719901;124.065518,43.700331;124.067245,43.693561;124.055615,43.667878;124.045211,43.662798;124.033997,43.665187;124.02115,43.662984;124.015595,43.649861;124.003678,43.650564;123.997123,43.635666;123.987383,43.632232;123.985999,43.628109;123.976669,43.63034;123.96463,43.620919;123.952315,43.619391;123.944076,43.602656;123.936321,43.601905;123.931247,43.604624;123.927287,43.597878;123.902776,43.59565;123.892139,43.586177;123.890321,43.565408;123.886379,43.56175;123.868418,43.555772;123.852855,43.557246;123.842469,43.55425;123.828592,43.557384;123.81302,43.554498;123.802316,43.547013;123.798628,43.54067;123.798672,43.526677;123.792631,43.522182;123.785764,43.522433;123.774051,43.504054;123.772711,43.495354;123.777268,43.489891;123.752252,43.476509;123.759203,43.469826;123.757652,43.459991;123.751933,43.457362;123.750169,43.452679;123.755332,43.445024;123.715638,43.422409;123.716833,43.418282;123.709243,43.409574;123.711438,43.402334;123.705994,43.396928;123.715997,43.391705;123.703311,43.388443;123.712092,43.382062;123.710983,43.377456;123.62133,43.373124;123.598131,43.379545;123.522193,43.444011;123.512911,43.45786;123.500463,43.465142;123.494028,43.477091;123.483002,43.473455;123.472841,43.462331;123.461033,43.456747;123.459223,43.446648;123.447419,43.42816;123.433992,43.428351;123.43603,43.439693;123.427419,43.450086;123.379298,43.47231;123.362449,43.485943;123.34236,43.493273;123.332469,43.503763;123.327763,43.511364;123.33164,43.523684;123.310911,43.540146;123.320041,43.557667;123.348534,43.561271;123.378195,43.570561;123.389297,43.568752;123.389387,43.571749;123.396067,43.572015;123.463797,43.557764;123.460202,43.566822;123.46838,43.577293;123.452914,43.587256;123.441784,43.587736;123.432856,43.605675;123.44679,43.60626;123.467166,43.599959;123.471532,43.591476;123.480863,43.597734;123.49698,43.594172;123.517193,43.599177;123.519948,43.610441;123.513174,43.617549;123.51985,43.621579;123.515464,43.626076;123.520978,43.628135;123.517585,43.631613;123.529982,43.635857;123.53534,43.631656;123.53848,43.632349;123.536687,43.635355;123.543916,43.640053;123.539329,43.647914;123.5444,43.652612;123.525798,43.687287;123.532239,43.696493;123.531603,43.702222;123.525847,43.706869;123.52596,43.718158;123.516232,43.722883;123.505241,43.739671;123.496774,43.737758;123.487567,43.745904;123.483789,43.77504;123.494444,43.776501;123.501559,43.78545;123.499407,43.803716;123.481611,43.840772;123.482287,43.856787;123.452258,43.893516;123.430365,43.93139;123.419071,43.936521;123.402802,43.96007;123.388592,43.958376;123.384068,43.964666;123.378099,43.962544;123.373771,43.965703;123.373577,43.969303;123.383861,43.979299;123.395591,43.981438;123.395565,43.984415;123.364993,44.016265;123.356972,44.0382;123.34751,44.051899;123.342118,44.073228;123.35943,44.077181;123.399417,44.077001;123.473648,44.087508;123.545063,44.082973;123.564344,44.089648;123.594181,44.095005;123.615549,44.087754;123.644973,44.083419;123.654037,44.093894;123.664629,44.097616;123.671401,44.111337;123.687419,44.112253;123.690863,44.110459;123.700227,44.083833;123.708153,44.082213;123.722556,44.071261;123.72776,44.061455;123.742862,44.052214;123.760658,44.047782;123.774276,44.035587;123.778164,44.027963;123.772542,44.021461;123.772747,44.016087;123.758252,44.00863;123.762618,44.006331;123.945659,43.99816;124.015917,44.00685;124.024136,44.011349;124.029537,43.97389;124.043655,43.935458;124.068589,43.904531;124.071157,43.896849;124.084317,43.887286;124.093782,43.873998;124.086758,43.860948;124.086314,43.847292;124.077004,43.81536;124.066149,43.803093;124.049835,43.798838;124.042873,43.790715";
//    var siping_tiedong = "124.705676,43.066287;124.694906,43.059818;124.693465,43.043515;124.683754,43.033515;124.676525,43.008178;124.660432,42.99986;124.6669,42.98847;124.665799,42.981285;124.662003,42.979528;124.651681,42.981089;124.641698,42.97714;124.638527,42.965856;124.643466,42.960056;124.636521,42.955115;124.627582,42.953923;124.626315,42.947049;124.610895,42.942614;124.608754,42.929016;124.590857,42.911976;124.576528,42.905436;124.566758,42.896293;124.556547,42.896736;124.548121,42.892854;124.544029,42.874418;124.540939,42.873835;124.537413,42.877992;124.521088,42.879005;124.5037,42.868654;124.483558,42.863731;124.471792,42.85312;124.478175,42.837632;124.475871,42.830389;124.469195,42.828292;124.456918,42.832002;124.457914,42.858621;124.454402,42.869513;124.442829,42.874664;124.442411,42.885941;124.435814,42.886351;124.430807,42.880584;124.415876,42.886135;124.378219,42.886463;124.373799,42.888743;124.37172,42.90827;124.385047,42.918898;124.394206,42.916099;124.401643,42.921126;124.402872,42.926244;124.416546,42.927711;124.424387,42.935146;124.434587,42.936012;124.439488,42.944455;124.448357,42.948497;124.450013,42.952171;124.444542,42.958783;124.443686,42.969251;124.432745,42.974805;124.42448,42.983304;124.416905,42.983039;124.403225,42.976022;124.378916,42.976809;124.372223,42.981688;124.361067,42.98421;124.353018,42.995196;124.340034,43.005225;124.342607,43.009178;124.355846,43.014961;124.407003,43.057656;124.432235,43.085352;124.402742,43.098544;124.374603,43.125785;124.359246,43.131221;124.363162,43.14644;124.397274,43.202349;124.423932,43.203086;124.435393,43.215793;124.446783,43.218094;124.452916,43.225358;124.469939,43.224055;124.488282,43.215329;124.495937,43.2062;124.525446,43.196129;124.531548,43.186809;124.571261,43.188129;124.569519,43.182571;124.572448,43.184601;124.578632,43.183615;124.599496,43.167858;124.61549,43.165761;124.628805,43.15007;124.634191,43.151678;124.643888,43.1635;124.66483,43.180224;124.720662,43.185079;124.731807,43.203054;124.742382,43.211513;124.749493,43.214538;124.766526,43.214592;124.781806,43.221451;124.785969,43.220874;124.784753,43.215893;124.789283,43.207608;124.797406,43.202439;124.802947,43.202128;124.862577,43.152095;124.882296,43.146951;124.889477,43.140778;124.876792,43.130429;124.865065,43.125194;124.847178,43.132478;124.82973,43.13089;124.817815,43.124223;124.803436,43.128672;124.792125,43.123213;124.789136,43.109875;124.765721,43.093879;124.756951,43.077764;124.750536,43.075246;124.7301,43.075588;124.705676,43.066287";
//    var siping_yitong = "125.69856,43.159455;125.71094,43.145087;125.715378,43.134793;125.725056,43.129752;125.763785,43.135943;125.789178,43.103631;125.761329,43.092263;125.738352,43.092162;125.744211,43.081889;125.738983,43.071085;125.715416,43.063864;125.688822,43.065002;125.668908,43.083287;125.666393,43.082402;125.665934,43.066856;125.670723,43.061151;125.641169,43.076562;125.615797,43.073263;125.591668,43.076397;125.565144,43.096881;125.549985,43.102503;125.500886,43.106488;125.485028,43.155521;125.485218,43.169048;125.496754,43.187553;125.490238,43.201717;125.485311,43.207353;125.470036,43.209848;125.463224,43.221474;125.453818,43.22573;125.453798,43.229729;125.443863,43.2291;125.440123,43.236465;125.427152,43.2392;125.416982,43.235636;125.408221,43.225987;125.379634,43.230478;125.374088,43.225064;125.379629,43.207776;125.377206,43.192683;125.362836,43.168997;125.3726,43.158892;125.407072,43.153791;125.408958,43.146091;125.395757,43.12682;125.395028,43.114575;125.391863,43.112176;125.381653,43.116718;125.371812,43.116471;125.344108,43.133751;125.319669,43.140772;125.276322,43.15996;125.272872,43.167332;125.253068,43.181747;125.239981,43.198245;125.21615,43.217362;125.211327,43.231127;125.205531,43.235003;125.16428,43.23562;125.150824,43.22971;125.107542,43.227699;125.099243,43.221878;125.090661,43.223222;125.076187,43.220885;125.065525,43.22201;125.05915,43.226496;125.048656,43.228347;125.025351,43.216848;125.018896,43.20533;125.011608,43.202528;124.976874,43.19961;124.971733,43.196297;124.969075,43.181092;124.918465,43.151707;124.901196,43.1482;124.889477,43.140778;124.877749,43.148854;124.870447,43.14839;124.862577,43.152095;124.842464,43.171445;124.852617,43.177367;124.853677,43.187482;124.843309,43.20094;124.831637,43.208099;124.820906,43.219624;124.83584,43.228332;124.877815,43.289829;124.886845,43.293606;124.888399,43.298172;124.897124,43.295972;124.904027,43.303007;124.912078,43.303009;124.919277,43.309617;124.919458,43.315532;124.923375,43.315199;124.92827,43.321344;124.936342,43.322942;124.935973,43.335351;124.925159,43.34244;124.925775,43.352215;124.922243,43.356684;124.890738,43.364948;124.885908,43.393101;124.87681,43.399868;124.873441,43.408268;124.866809,43.411792;124.876704,43.425816;124.892119,43.431498;124.899424,43.428337;124.904153,43.429498;124.921021,43.444102;124.918788,43.455558;124.921218,43.464337;124.914027,43.467923;124.900909,43.488901;124.928123,43.507321;124.969738,43.516282;124.992504,43.524596;125.009992,43.545531;125.010452,43.551151;125.018159,43.555221;125.041166,43.587235;125.071844,43.604529;125.078096,43.60678;125.083693,43.604684;125.100051,43.608944;125.103832,43.600358;125.126387,43.617435;125.161214,43.628554;125.208127,43.638346;125.232633,43.640178;125.242586,43.647241;125.255591,43.651664;125.288208,43.654382;125.305187,43.651056;125.307064,43.617477;125.298133,43.607041;125.300814,43.601659;125.297212,43.591908;125.278473,43.570437;125.288777,43.548713;125.286467,43.5447;125.27214,43.541249;125.265632,43.530071;125.275272,43.505202;125.266315,43.496397;125.252066,43.49415;125.244318,43.484082;125.251525,43.459845;125.257241,43.454801;125.293229,43.450238;125.306601,43.454738;125.315699,43.462179;125.331495,43.465616;125.360209,43.481921;125.371211,43.484638;125.383976,43.48194;125.391019,43.484364;125.389952,43.491028;125.383666,43.494887;125.385964,43.501981;125.375229,43.507436;125.375993,43.510695;125.372066,43.5125;125.374911,43.515425;125.365494,43.51901;125.377152,43.532367;125.3936,43.538578;125.383847,43.558537;125.395543,43.563925;125.407299,43.591817;125.435137,43.59508;125.455112,43.608795;125.459521,43.597839;125.456925,43.592145;125.459064,43.582223;125.465409,43.567734;125.462613,43.5485;125.453487,43.536558;125.463749,43.529068;125.469338,43.50595;125.48315,43.489724;125.493123,43.487568;125.498716,43.478667;125.494589,43.461839;125.508285,43.457884;125.514947,43.450957;125.522522,43.448737;125.50991,43.437685;125.504573,43.424785;125.512976,43.423616;125.519705,43.418771;125.540831,43.41729;125.55511,43.410032;125.58243,43.413632;125.589968,43.400564;125.588601,43.385648;125.587758,43.38331;125.568671,43.37834;125.553565,43.371051;125.551648,43.363071;125.560871,43.350705;125.577136,43.342083;125.602444,43.32027;125.614131,43.318399;125.626853,43.312196;125.634414,43.301839;125.679284,43.285987;125.689942,43.278994;125.694405,43.258222;125.682035,43.247226;125.675024,43.245323;125.668861,43.234842;125.660065,43.230828;125.655326,43.221257;125.660673,43.20562;125.672175,43.204562;125.677828,43.193732;125.693738,43.177593;125.691426,43.17047;125.69856,43.159455"

        var shuangliao_maolin = "123.441047,43.91511;123.45657,43.913032;123.458869,43.91511;123.461169,43.91802;123.461744,43.919682;123.463469,43.923007;123.469793,43.925915;123.474392,43.926746;123.483016,43.929655;123.486465,43.931317;123.491065,43.932564;123.494514,43.935888;123.496814,43.937549;123.501413,43.939627;123.508312,43.94295;123.511761,43.944612;123.514061,43.946273;123.512911,43.942535;123.516936,43.941288;123.52096,43.940458;123.526134,43.942119;123.526134,43.944196;123.530159,43.94295;123.533033,43.946689;123.534758,43.945858;123.556605,43.952504;123.562929,43.955411;123.564079,43.959149;123.566953,43.95998;123.567528,43.962472;123.564079,43.962887;123.560629,43.966624;123.564079,43.967039;123.564654,43.971192;123.562929,43.974514;123.564654,43.986138;123.570403,43.985723;123.583051,43.986553;123.586501,43.986553;123.59225,43.986553;123.595124,43.986968;123.606048,43.988629;123.62272,43.990289;123.72678,43.99942;123.733679,43.999005;123.737703,43.99776;123.741728,43.9961;123.744027,43.9961;123.748627,43.996515;123.752076,43.99942;123.75725,44.002325;123.7584,44.00274;123.762425,44.0044;123.772198,44.00606;123.767671,44.006177;123.762658,44.00641;123.758328,44.008641;123.772755,44.016058;123.772576,44.021464;123.778181,44.027933;123.778199,44.027985;123.774309,44.035581;123.764365,44.044517;123.760673,44.047835;123.745087,44.051696;123.742887,44.052253;123.727786,44.061479;123.722603,44.071259;123.708185,44.08223;123.700253,44.083868;123.691926,44.107531;123.690893,44.110463;123.687443,44.112282;123.679987,44.111874;123.671372,44.111376;123.669962,44.108535;123.668112,44.10478;123.666908,44.102307;123.665264,44.098993;123.66459,44.097633;123.654008,44.093917;123.644962,44.083467;123.615561,44.087786;123.594181,44.09505;123.569118,44.090544;123.564375,44.089696;123.55294,44.085733;123.545053,44.083014;123.517942,44.08473;123.509516,44.085267;123.478192,44.087248;123.473664,44.087546;123.431435,44.08157;123.39941,44.077036;123.371428,44.077153;123.359409,44.077211;123.342081,44.073248;123.34747,44.051897;123.356948,44.038199;123.364969,44.016271;123.39553,43.984419;123.395548,43.981461;123.383834,43.979334;123.37353,43.96931;123.373737,43.965703;123.378076,43.962536;123.38404,43.964652;123.388586,43.958371;123.402779,43.960064;123.419047,43.936517;123.43033,43.931389;123.439601,43.915364;123.439646,43.915299;123.441038,43.91513"
//    var shuangliao_bolishanzhen = "123.482297,43.856902;123.487471,43.85607;123.489771,43.857734;123.491496,43.85607;123.492646,43.859398;123.49782,43.85607;123.500119,43.856486;123.498395,43.861478;123.500694,43.862726;123.501844,43.862726;123.503569,43.863974;123.507593,43.865638;123.509893,43.868966;123.516792,43.871461;123.519667,43.871045;123.524266,43.872293;123.524841,43.873957;123.53289,43.875204;123.534614,43.873957;123.539214,43.876868;123.542663,43.877284;123.544388,43.878531;123.557036,43.875204;123.579458,43.86855;123.582907,43.868966;123.582907,43.866886;123.585782,43.866054;123.593256,43.867718;123.613378,43.852326;123.622576,43.845252;123.617977,43.843172;123.612228,43.83693;123.609353,43.837346;123.603604,43.833184;123.59728,43.831935;123.593831,43.832768;123.589231,43.829022;123.589806,43.826941;123.587507,43.82486;123.581757,43.826524;123.561635,43.821113;123.561635,43.817783;123.561061,43.815701;123.557611,43.815701;123.554736,43.811954;123.549562,43.810289;123.543238,43.80904;123.540938,43.80904;123.536339,43.812371;123.53174,43.811954;123.527715,43.80904;123.522541,43.807374;123.516217,43.805709;123.512768,43.805709;123.506444,43.801961;123.502994,43.800712;123.501269,43.801129;123.499545,43.801545;123.499257,43.803705;123.481399,43.840779;123.482189,43.856746;123.482297,43.856902"
        var shuangliao_bolishanzhen = "123.482297,43.856902;123.487471,43.85607;123.489771,43.857734;123.491496,43.85607;123.492646,43.859398;123.49782,43.85607;123.500119,43.856486;123.498395,43.861478;123.500694,43.862726;123.501844,43.862726;123.503569,43.863974;123.507593,43.865638;123.509893,43.868966;123.516792,43.871461;123.519667,43.871045;123.524266,43.872293;123.524841,43.873957;123.53289,43.875204;123.534614,43.873957;123.539214,43.876868;123.542663,43.877284;123.544388,43.878531;123.557036,43.875204;123.579458,43.86855;123.582907,43.868966;123.582907,43.866886;123.585782,43.866054;123.593256,43.867718;123.613378,43.852326;123.622576,43.845252;123.617977,43.843172;123.612228,43.83693;123.609353,43.837346;123.603604,43.833184;123.59728,43.831935;123.593831,43.832768;123.589231,43.829022;123.589806,43.826941;123.587507,43.82486;123.581757,43.826524;123.582117,43.815345;123.561635,43.817783;123.561061,43.815701;123.557611,43.815701;123.554736,43.811954;123.549562,43.810289;123.543238,43.80904;123.540938,43.80904;123.536339,43.812371;123.53174,43.811954;123.527715,43.80904;123.522541,43.807374;123.516217,43.805709;123.512768,43.805709;123.506444,43.801961;123.502994,43.800712;123.501269,43.801129;123.499545,43.801545;123.499257,43.803705;123.481399,43.840779;123.482189,43.856746;123.482297,43.856902"

        areas.push(siping_shuangliao);
        areas.push(shuangliao_maolin);
        areas.push(shuangliao_bolishanzhen);


//    areas.push(siping_lishu);
//    areas.push(siping_tiexiqu);
//    areas.push(siping_shuangliao);
//    areas.push(siping_tiedong);
//    areas.push(siping_yitong);
        colors = ["#fff492", "#fff492", "#98d057", "#e19ee6", "#1ad3da", "#ffc11d", "#98e800", "#b95817", "#03a9f4", "#39d0a4", "#8bbb53"];
        var pointArray = [];
        for (var i = 0; i < areas.length; i++) {

            var ply = new BMap.Polygon(areas[i], {strokeWeight: 2, strokeColor: "#ff0000"}); //建立多边形覆盖物
            ply.setFillColor(colors[i])   //设置多边形的填充颜色
            ply.setFillOpacity(0.35);
//            ply.enableEditing();  //范围可编辑 【编辑的时候开启】


            if (i == 2) {
                polygons.push(ply);  //加入多边形数组，以之后获取多边形边界点集
                ply.enableEditing();  //范围可编辑 【编辑的时候开启】
            }

            map.addOverlay(ply);  //添加覆盖物
            pointArray = pointArray.concat(ply.getPath());
        }
        map.setViewport(pointArray);    //调整视野

    }

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//获取编辑后的边界点集【编辑完后，可以通过 button 来触发这个方法】
    function getpoints() {
        for (var j = 0; j < polygons.length; j++) {
            var polyline = polygons[j];
            var pts = polyline.getPath();

            var sss = "";
            for (var i = 0; i < pts.length; i++) {
                sss += pts[i].lng + "," + pts[i].lat + ";";
            }
            document.getElementById("info").innerHTML = "";
            document.getElementById("info").innerHTML += sss;    //输出数组里的经纬度

            console.log(sss);   //【将点集输出到控制台】
        }

        alert('已输出边界点集合!');
    }
参考资料
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