Simple Log Service:Display query results on a trail map

Background information

A trail map uses AMAP to display the trail of an object over a period of time. Simple Log Service provides two types of trail maps: Longitude and Latitude and POI Region.

For more information about the entry point to add a trail map, see Add a chart (Pro) to a dashboard.

General Configurations

You can configure global settings for a trail map on the General Configurations tab.

• Basic Configurations

  Parameter	Description
  Title	The title of the chart.
  Display Title	If you turn on Display Title, the title of the chart is displayed.
  Display Border	If you turn on Display Border, the borders of the chart are displayed.
  Display Background	If you turn on Display Background, the background color of the chart is displayed.
  Display Time	If you turn on Display Time, the query time range of the chart is displayed.
  Fixed Time	If you turn on Fixed Time, the query time range of the chart is independent of the global time range of the dashboard.

• Query and Analysis Configurations

  Parameter	Description
  Trail Type	Select the type of the trail map. Valid values: Longitude and Latitude and POI Region.
  Identifier Column	Select a field to identify data.
  Information Column	Select the fields that you want to display on the trail map. You can select one or more fields. You can click a point on the trail map to view the selected fields in a pop-up window.
  Longitude	This parameter is required if you select Longitude and Latitude for the Trail Type parameter. You must select the field that records the longitude data.
  Latitude	This parameter is required if you select Longitude and Latitude for the Trail Type parameter. You must select the field that records the latitude data.
  POI Field	This parameter is required if you select POI Region for the Trail Type parameter. You must select the field that records the POI data.
  Time Column	Select a field to identify time.

• Variable Replacement

  Parameter

  Description

  Variable Replacement

  The settings of variable replacement. You can click AddVariable Replacement to add a filter of the Replace Variable type to a chart. After you configure the settings of variable replacement on the General Configurations tab, Simple Log Service adds a filter in the upper-left corner of the chart. You can select a value from the filter drop-down list. After you select a value, Simple Log Service automatically replaces the variable in the query statement of the chart with the variable value indicated by the value that you select, and performs a query and analysis operation. For more information, see Example 2: Configure variable replacement.

• Documentation

  Parameter	Description
  Add Documentation Link	The button that allows you to specify custom document links and descriptions. After you configure the settings, the specified information is displayed in the upper right corner of the chart.