学习Google Maps自带实例 多点测距尺 学习Google Maps自带实例:多点测距尺20100528 11:16 Google Maps自带实例多点测距尺实现的功能就是可以根据用户标出的任意多点,从而返回计算得到的各个点之间的距离
me.removePoint_(marker); me.updateDistance_(); div.appendChild(lnk); //当用户关闭信息窗口时 Google 地图 API 会自动释放该对象 return div; *事件处理函数:当用户选择删除标记时被调用,这里要删除与该标记连 接的线段 *@param{GMarker}marker 要删除的标记 GRulerControl.prototype.removePoint_=function(...
me.updateDistance_ div.appendChildlnk //当用户关闭信息窗口时Google地图API会自动释放该对象 return div / 事件处理函数当用户选择删除标记时被调用这里要删除与该标记连接的线段 paramGMarkermarker要删除的标记 / GRulerControl.prototype.removePoint_functionmarker var methis //先从地图上删除该标记 me.map_....
GoogleMaps自带实例多点测距尺实现功能就是可以根据用户标出任意 多点,从而返回计算得到各个点之间距离。也就是说,计算出了一条折 线长度--是在地理上实际距离。 实例代码如下所示: !DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Strict//EN" htmlxmlns="xmlns:v="urn:schemas-microsoft-com:vml" ...
The other item is how to read the radius between two marker. The excellent job we found is from:http://www.barattalo.it/2009/12/19/ruler-for-google-maps-v3-to-measure-distance-on-map/, the author is Giulio Pons. With Giulio's source we built a ruler also. ...
The “ruler” tool in Google Earth has always been useful, and it has seen a number of improvements over the years.To get started with it, simply go to [Tools] –> [Ruler] in Google Earth and it’ll open up for you in a small window. ...
For this task, we capture and examine screen shots of Google Maps in action. Used in this analysis is a tool called Art Directors Toolkit (comes bundled with Mac OS X) which offers an overlay desktop ruler image for measuring pixel distances onscreen. This is what appears in the screenshots...
{ AdvancedMarkerElement } = await google.maps.importLibrary("marker") as google.maps.MarkerLibrary; const center = {lat: 37.43238031167444, lng: -122.16795397128632}; const map = new Map(document.getElementById("map") as HTMLElement, { zoom: 11, center, mapId: "45...
In addition, the distance between/among different malaria cases was measured by the ruler. Conclusion The sketch map of malaria epidemics established by Google Earth is clear, intuitive and easy to operate, which is suitable for use in the prevention and control of malaria elimination in grass-...
GRulerControl.prototype.setEnabled = function(value){}中设置当前的GRulerControl控件的禁用/启用状态。在启用状态加上: me.mapClickHandle_ = GEvent.addListener(me.map_, 'click', me.onMapClick_);和me.updateDistance_();以监听鼠标动作并及时更新距离。 返回控件是否已启用函数GRulerControl.prototype.is...