Tima version: 2022-03
LHS version: 5.0
DeltaTima version:GeometryServer version:FMS type:
Client:
Diagnosis and Solution: This happens when the historical GPS data density is very low, e.g., one GPS point per truck per minute. It could also happen if there is not a table with historical GPS data and traditional flow GPS connectors (conn_truck_gps_logs and conn_truck_gps_logs_oneshot) uses the same data source as real time connectors, which usually contains just one record with the most up-to-date reported position per equipment.
Depending on the amount of blank data, there are two possible ways to solve the problem:
- Most of the speed heatmap has blank data (like the image above): It is recommended to use the real time connector to write a JSON file on every iteration and then use the gps_logs_oneshot connector to read and clean this file and get the accumulated data as if this were historical GPS data. This way, you can get a larger amount of GPS data into LHS Database, obtaining speeds heatmap with the most information as possible.
- There is a smaller amount of blank data: It is recommended to calibrate the LHS Apps heatmap interpolation to fill as many blank data as possible.