Simple Log Service:Trail map

Background information

A trail map is built on AMAP and displays the movement path of a target over a period of time by plotting points and lines. Depending on the data type, a trail map supports two modes: longitude and latitude or POI region.

To add a trail map, see Add a chart to a dashboard.

General configurations

Use general configurations to define global settings for your trail map.

• Basic configurations

  Parameter	Description
  Title	The chart title.
  Display Title	Shows the chart title when enabled.
  Display Border	Shows a border around the chart when enabled.
  Display Background	Shows a background color for the chart when enabled.
  Display Time	Shows the query time in the chart when enabled.
  Fixed Time	Locks the query and analysis time range so that it is not affected by the dashboard's global time setting.

• Query and analysis configurations

  Parameter	Description
  Trail Type	The type of data to visualize. Options are longitude and latitude and POI region.
  Identifier Column	Specifies the field that uniquely identifies the data for each trail.
  Information Column	Specifies one or more fields to display on the map. This information appears in a pop-up window when you click a point on the trail map.
  Longitude	This parameter is required when Trail Type is set to Latitude and Longitude. Select the field that contains the longitude data.
  Latitude	This parameter is required when Trail Type is set to Latitude and Longitude. Select the field that contains the latitude data.
  POI Field	When Trail Type is set to POI region, you must configure this parameter. Select the field where the POI region data is located.
  Time Column	Specifies the field to use as the time column.

• Variable replacement

  Parameter	Description
  Variable Replacement	Variable replacement serves as a variable-based filter for a single chart. After you configure it in General Configurations, a filter appears in the upper-left corner of the chart. Selecting a value from the filter replaces the variable in the query and analysis statement and re-runs the query and analysis. For a configuration example, see Example 2: Configure variable replacement.

• Documentation link

  Parameter	Description
  Add Documentation Link	Adds a custom documentation link or description to the upper-right corner of the chart.