Geomesa TrackLabel WPS流程(Geomesa TrackLabel WPS process)

编程入门行业动态更新时间:2024-10-26 02:34:58

我试图通过geoserver的WPS显示在我的geomesa-accumulo数据库中注册的每个设备的当前位置。由于每个设备每隔X秒发送一次位置。我使用geomesa的TrackLabel流程来获取每个设备的最后位置，WPS流程设置为：

track: device_id dtg : date_time

使用我运行该过程并使用传单显示结果。但是，我认为结果不是我所期望的，因为如果我在jupyter笔记本中运行以下查询：

spark.sql("select device_id, date_time, position from positions where device_id = 145 order by date_time desc limit 1").show()

它返回的最后一个位置是2016-05-17 20:47，但TrackLabel流程表示2016-03-05 20:12 。

我的问题：如果这是正确的方法，那么我错过了什么？或者这个问题的正确方法是什么？

I am trying to display the current position of every device registered in my geomesa-accumulo database through geoserver's WPS. Since each device sends its position every X seconds. I am using geomesa's TrackLabel process to get the last position of each device, the WPS process setup is:

track: device_id dtg : date_time

Using I run the process and display the results using leaflet. But, I think the results are not what I expected, because if I run the following query in jupyter notebook:

spark.sql("select device_id, date_time, position from positions where device_id = 145 order by date_time desc limit 1").show()

It returns that the last position was at 2016-05-17 20:47 but the TrackLabel process says 2016-03-05 20:12.

My questions: If this the correct approach, then what am I missing? Or what should be the correct approach for this problem?