Dynamically Update a Map

Question

I have a bit of a situation. I was assigned a task to create a system that will take a KML file and update markers dynamically on a map. I'm currently generating the KML from a Wireshark Dissection and now need a way to take said data into a mapping tool. There are a few situations:

1. The PC that will be running the system will not have internet access, so I will need to cache de map data.
2. Each marker might move location so I need to erase said marker's previous location and update it with a new marker location. I do have a sequence ID I can identify it with, but I don't know how I'll update the new location.
3. It needs to be dynamically updated. A system will send data, my Wireshark Dissector will dissect the data and export it into a KML. This KML will need to be dynamically loaded into the system.

The basic idea in mind is like looking at Google Maps and watching your car move as it tracks your GPS location. But I need to make this tracking system work for a lot more targets than just one.

I'm sorry I currently have no foundation on where to start, but that's why I ask for your guidance. I've researched on ArcGIS, QGIS, Google Earth and Maps, but I haven't found a way to upload dynamically nor refresh the system.

Anything that could help me start finding a solution for this task will be appreciated.

Thank you for your time.

Answer 1

我有使用传单js的经验，它允许你使用bing map，google map或opensource MapQuest来显示移动轨道和汽车跟踪（适用于GM OnStar）。我也正在为kml编码，以便在google earth上显示航班跟踪。

首先，我不确定是否可能：

• 您的计算机无法连接到互联网
• 您想在互联网上使用这些地图资源

因此，我将假设您的机器可以访问互联网。然后，有很多解决方案。

您可以尝试在http://leafletjs.com/上查看简单的教程 你会知道如何做到这一点。 此外，您还搜索了Google地球的示例（我可以在其上显示3D跟踪路线）。

希望得到这个帮助。

Answer 2

除了地图之外，请参阅以下内容中的“动态更新Google地球上的数据”示例：

https://sites.google.com/site/canadadennischen888/home/kml/auto-refresh-3d-tracking

希望这有帮助......

（以下是我的链接中的副本，其中讨论了用于3D Google地球的KML。但我相信如果你必须“不使用google-earth”，你可以将它变成2D。）

...

如何制作动态自动刷新3D跟踪：

1. 准备RestFul服务以从DB生成KML文件 （样本如https://sites.google.com/site/canadadennischen888/home/kml/3d-tracking）

2. 我的其他jsp代码将生成一个KMZ文件，其中包含指向Restful服务的链接。 KMZ文件有onInterval（如下图所示）

3. Jsp网页允许用户下载KMZ文件。

4. 当Google地球打开KMZ文件时，Google地球会自动刷新以从该Restful服务获取新数据

5. 每次刷新时，服务器都会向GE发送包含新数据的最新更新KML数据。

6. KMZ样本：

    <?xml version="1.0" encoding="UTF-8"?>
     <kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" 
     xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom">
     <NetworkLink> 
     <name>Dennis_Chen_Canada@Hotmail.com</name> 
     <open>1</open> 
     <Link> 
     <href>http://localhost:9080/google-earth-project/rest/kml/10001/20002</href> 
     <refreshMode>onInterval</refreshMode> 
     </Link>
     </NetworkLink>
     </kml>
   

7. 查看结果