This topic describes how to configure a trail map to display query results.
Background information
A trail map uses AMap to display the trail of a target over a period of time. Simple Log Service provides two display modes for trail maps: longitude and latitude and points of interest (POI).
Each trail map consists of the following elements:
Map canvas
Points and lines
Time line
Procedure
- Log on to the Log Service console.
- In the Projects section, click the name of the project that you want to manage.
- Choose and click the Logstore that you want to manage.
- Enter a query statement in the search box, select a time range, and then click Search & Analyze.
On the Graph tab, click the icon.
On the Properties tab, configure the properties of the trail map.
Parameter
Description
Trail Type
The type of the trail map. Valid values: Longitude & Latitude and POI.
Identity Column
The field that is selected to identify trail data.
Information Column
The information to be displayed on the map. You can select one or more fields for this parameter.
You can click a point on the trail map to view the information that is displayed on a pop-up window.
Longitude
You must set this parameter if you select Longitude & Latitude for Trail Type. You must select the field that includes the longitude data.
Latitude
You must set this parameter if you select Longitude & Latitude for Trail Type. You must select the field that includes the latitude data.
POI Field
You must set this parameter if you select POI for Trail Type. You must select the field that includes the POI data.
Examples
To view the trails of specific confirmed COVID-19 cases in Hainan province during the epidemic period, execute the following query statement.
SQL statement
type:trace | select location, __time__, id, action, text
Dataset
location
__time__
action
id
text
Village A, Longhua District
1582892272
Drive home
170
On the morning of February 24, confirmed case No.170 drove home with confirmed cases No.136 and No.143 from Haikou city center to Village A of Longhua District.
Village A, Longhua District
1582892272
Stay home
170
Confirmed case No.170 stayed home from February 25 to February 27, but met confirmed case No.123.
Village A, Longhua District
1582892272
Drive to Haikou
170
On the morning of February 28, confirmed case No.170 drove from Village A of Longhua District to Haikou and bought food at the wet market in Longqiao Town.
Properties