WebGIS让小车沿着指定路径行走_threejs小车移动动画资源-CSDN下载

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js：4个

html：3个

png：1个

WebGIS

运动小车

需积分: 50 17 浏览量 2018-10-16 10:57:12 上传评论 4 收藏 140KB RAR 举报

WebGIS，全称为Web Geographic Information System，是一种基于互联网的地理信息系统，它将地理信息与Web技术相结合，使得用户可以通过浏览器或者其他Web客户端访问、查询、分析和展示地理数据。本资源主要涉及两个关键知识点：地理坐标系与投影坐标系，以及在谷歌3D环境下实现小车沿指定路径行走的动画。我们来深入理解地理坐标系和投影坐标系。地理坐标系是以地球的自然形状——椭球体为参考基准，通常使用经度和纬度来表示地面上的点。它适用于全球范围内的定位，但并不适合进行距离和面积的精确计算。而投影坐标系则是将地理坐标转换成平面坐标，以便于进行测量和制图。常见的投影方法有墨卡托投影、UTM（Universal Transverse Mercator）投影等，它们在特定区域内可以保持形状、方向或比例尺的一致性，但不可避免地会产生变形。在WebGIS应用中，选择合适的投影坐标系对于地图显示和数据处理至关重要。我们要关注的是在谷歌3D环境下实现小车沿指定路径行走的动画。这涉及到WebGL技术，它允许在浏览器中进行三维图形渲染，无需额外插件。谷歌3D环境通常指的是Google Earth API或者Google Maps的3D视图。在这里，小车的运动需要通过编程来实现，可能使用JavaScript库如Three.js或者Cesium.js，这些库提供了丰富的API用于创建3D对象、管理场景和动画控制。路径规划可能依赖于GIS的数据处理，如解析GPS轨迹数据，然后通过算法如Dijkstra或A*寻找到达目的地的最短路径。动画效果则需要通过定时更新小车的位置，以模拟其沿着路径移动的过程，并确保视觉上的流畅性。具体到“多车轨迹”这个文件，可能包含多个车辆的行驶轨迹数据，这些数据可能以KML（Keyhole Markup Language）或GPX（GPS eXchange Format）格式存储，它们是用于记录地理空间轨迹的标准格式。开发者需要解析这些文件，提取出每辆车的经纬度坐标，然后在3D环境中创建相应的动画，使每辆小车按照各自轨迹移动。本资源集成了WebGIS的基本概念，包括地理信息的表示方式和3D环境下的动态呈现，同时也涵盖了编程实现动态地图元素的关键技术。无论是对GIS初学者还是资深开发者，都是一个宝贵的实践素材，可以帮助理解和掌握WebGIS的核心技术和应用。

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多车轨迹.rar （8个子文件）

多车轨迹

多车轨迹_地理坐标系.html 3KB

img

car.png 36KB

Tra_movement_alarm.js 4KB

mapTran.js 16KB

jquery-1.12.4.js 297KB

Tra_movement_alarm2.js 4KB

轨迹_投影坐标系.html 43KB

谷歌3D轨迹.html 4KB

<!doctype html> <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <title>多车运行轨迹</title>   <link rel="stylesheet" type="text/css" href="http://localhost/arcgis_js_api/library/3.16/3.16/esri/css/esri.css" /> <script type="text/javascript" src="http://localhost/arcgis_js_api/library/3.16/3.16/init.js"></script> <script type="text/javascript" src="js/jquery-1.12.4.js"></script> <script type="text/javascript" src="js/Tra_movement_alarm2.js" ></script> <script type="text/javascript" src="js/mapTran.js" ></script> <script type="text/javascript"> $(document).ready(function(){ initMaps(); }); var map; function initMaps(){ require(["esri/map","esri/geometry/Extent","esri/SpatialReference","esri/geometry/Point","dojo/domReady!"], function(Map,Extent,SpatialReference,Point){ map=new Map("mapDiv",{ logo:false, slider:true, nav:false, basemap:'dark-gray', //extent:new Extent({xmin:116.5,ymin:36.2,xmax:117.5,ymax:37.2,spatialReference:{wkid:3857}}) }); //图层初始化 /* var sdvecLayer=new SDTDTLayer(); map.addLayer(sdvecLayer);*/ var carspeed = 10; //var points0 = randomLonandLat(); var carattr = ["img/car.png",20,35]; var color0 = [0,255,0]; var beiyourout = "LINESTRING (1.27981524405E7 4273980.9926, 1.27981728128E7 4274007.3832, 1.27981925994E7 4274034.4366, 1.2798211786E7 4274062.1337, 1.27982303586E7 4274090.4539, 1.27982483036E7 4274119.3771, 1.27982656084E7 4274148.882, 1.27982822602E7 4274178.9474, 1.27982982468E7 4274209.5516, 1.27983135571E7 4274240.6725, 1.27983281797E7 4274272.2875, 1.2798342104E7 4274304.3737, 1.27983553201E7 4274336.9076, 1.27983678183E7 4274369.8661, 1.27983795894E7 4274403.2252, 1.27983906251E7 4274436.9606, 1.27984009174E7 4274471.0481, 1.27984104587E7 4274505.4627, 1.27984192422E7 4274540.1798, 1.27984272617E7 4274575.1742, 1.27984345111E7 4274610.4204, 1.27984409852E7 4274645.893, 1.27984466794E7 4274681.5664, 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