GPS Tracking of Clark County Public Works Vehicles A short history of Public Works AVL Processing data from vehicles with equipment – ArcGIS (ArcPy) – Python Reporting and displaying work activity Work planning Customer service
Automated Vehicle Location (AVL) GPS modems added to Public Works vehicles in 2012 Near real time vehicle location – Point location – Bearing – Speed – Equipment on/off Managers love this stuff
The Columbian Clark County uses GPS to track employees By Stephanie Rice Columbian Vancouver city government reporterStephanie Rice Monday, June 11, 2012 “On the day last summer that the tracking started in the facilities department, Wilsdon said two employees were to go from where the vehicles are kept behind the Clark County Public Service Center across the street to the Clark County Courthouse. Employees had been notified the tracking system was in effect. What should have been a two-minute trip took 45 minutes, and managers watched on a monitor as the employees first drove to get coffee and doughnuts. The employees were disciplined but are still with the county, Wilsdon said.” “…that system involves more development costs, mostly the time of Bob Poole, the county's Geographic Information Systems manager, and will be an internal system rather than the Internet-based GPS Insight. It will be $500 cheaper per vehicle to operate, however, than GPS Insight, said Pete Capell, director of Public Works.”
Conceptual Consumables Customer service Work planning Work summary reports – Operation time – Operation distance (lane miles) – County Worksite (geographic area) – Vehicle ID – Date – Roads sweeping history
Location Analytics: Starting Point Starting point is a SQL view Limited to sweeping vehicles Limited to unprocessed records AVL data processing No out of the box ArcGIS solution
Processing Step 2: Line Creation ESRI point to line script Check each record for: –Test bearing change from previous point End line and start a new line when bearing Δ > 50° –Check for stall; time between points > 2 min –Check for change in worksite –Check for change in linear reference feature –Check for change in equipment on/off
Processing Step 2: Line Creation ESRI point to line script Check each record for: –Test bearing change from previous point End line and start a new line when bearing Δ > 50° –Check for stall; time between points > 2 min –Check for change in worksite –Check for change in linear reference feature –Check for change in equipment on/off What does this look like in model builder?
Conclusions AVL processing is possible using ESRI tools, but comes at a cost Managers are getting an accurate and uniform measure of work performed Opens the door for real analysis Apple's Phil Schiller: "We don't use any customer surveys, focus groups, or typical things of that nature"
GPS Tracking of Clark County Public Works Vehicles Questions?