Chart Report

The Chart Report creates interactive graphs showing how vehicle data changes over time. Use this to analyze trends, spot anomalies, and understand vehicle performance patterns.

Generating a Chart

Select Vehicle: Choose a vehicle from the dropdown
Select Chart Types: Choose one or more data attributes to visualize (you can compare multiple metrics)
Choose Time Type: Select which timestamp to use for the X-axis
Set Date Range: Define the time period to analyze
Click Show to generate the chart

Available Data Types

Speed and Distance:

Speed, Odometer, Trip Odometer

Location:

Altitude, Accuracy, Course, Latitude, Longitude

Engine:

RPM, Engine Hours, Throttle

Temperature:

Coolant Temp, Engine Temp, Device Temp

Fuel:

Fuel Level, Fuel Used, Fuel Consumption

Power:

Power, Battery, Battery Level

GPS Quality:

Satellites, Satellites Visible, HDOP, VDOP, PDOP

Other:

Acceleration, RSSI, Humidity

Time Type Options

Fix Time: When the GPS obtained the position
Device Time: Timestamp from the device
Server Time: When NexaBus received the data

Background Shading

Behind every chart line, the background is shaded using the same five vehicle states as the Timeline Report:

Red (Park): The vehicle is stationary with the ignition off
Green (Motion): The vehicle is in motion
Yellow (Stop): The vehicle is stationary but the engine is running
Dark (No GPS, ignition off): The device reported no GPS fix while the ignition was off
Gray (No Data): No reports were received for longer than 6 hours

Click any of the five legend entries to hide or show that state's shading. For fuel charts, any fill or drain window detected on the line is always shaded as park, since refueling or draining can only happen while the vehicle is parked.

Interacting with Charts

The chart is interactive:

Hover: See exact values at any point. For fuel charts, the popup also shows the fuel level in liters (if calibration is configured) and the noise-filtering window currently applied to the line.
Zoom: Use the slider at the bottom to zoom into specific time ranges
Pan: Drag to move along the timeline
Multiple Lines: Compare different metrics by selecting multiple chart types

Printing

Click the print icon to print the current chart view for records or sharing.

Use Cases

Speed Analysis: View speed patterns throughout a trip
Fuel Monitoring: Track fuel level changes to detect consumption patterns or leaks
Temperature Trends: Monitor engine or cargo temperature over time
Performance Comparison: Overlay multiple metrics to find correlations
Diagnostic Analysis: Investigate specific time periods for issues

No Data Found

If "No data found" appears:

Check that the vehicle was active during the selected dates
Verify the vehicle's GPS device reports the selected data types
Some data types depend on specific sensors being installed

Documentation