GPS Maps
Last updated
Last updated
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GPS Maps shows Global Positioning System data on a map overlay in real-time or from previously logged data. The GPS data can come from ICS logger hardware, from a GPS receiver, or from in-vehicle network messages sent by an ECU. GPS Maps is opened from the Measurement main menu.
Note: GPS Maps requires an active internet connection to access map applications found outside of Vehicle Spy.
Follow these general steps to use GPS Maps in Vehicle Spy:
Select a map application in GPS Maps.
Setup the GPS Maps lat/long inputs to match the source of GPS data.
Take Vehicle Spy online with ICS hardware to see data in real-time... ...OR online in simulation mode with a previously saved buffer file to replay it at different speeds.
The Map dropdown (Figure 1:
) selects which internet map application to use. Click and drag on the map to move it around and use the mouse wheel to zoom in and out. Each map application has custom built-in features and outside sources of help, so they are not explained further here.
Lat and Long show the latitude and longitude (in degrees) of the current map cursor location.
The red box is an optional validity flag to help describe the GPS data. The flag can show blank or "Valid" depending upon the result of a custom equation set up for the GPS data source. GPS Maps updates the display only if the red box shows "Valid".
ICS logger
GPS receiver
Vehicle ECU
On a related note, ICS logger GPS reporting at a 255 ms periodic rate can be enabled using either of these methods:
VSpy Setup Hardware, neoVI Explorer Connect, MISC IO, set Report GPS Coordinates = ON, Write Settings. (Figure 3:)
CoreMini function block script, Set Value command, Expression Builder, Misc/GPS, set GPS Enable = 1.
Many vehicles have an ECU transmitting GPS data across in-vehicle networks to other ECUs. Vehicle Spy can monitor the in-vehicle networks, decode the GPS messages from the ECU, and display the data on GPS Maps.
The Optional Latitude and Longitude Valid Expression is meant for handling the validity of GPS data which can suffer due to weather, long tunnels, poor connections, etc. The expression can be anything made with the Expression Builder, but it has the following impacts depending upon its result:
Result 0 = GPS Maps freezes on last lat/long values used and sets red box to blank.
Result 1 = GPS Maps updates lat/long values and red box shows Valid.
No expression = GPS Maps ignores the expression; so it updates lat/long values and red box shows Valid.
*Note: Do NOT use this feature if the GPS data source is an ICS logger; it uses the neoVI network as an INPUT to GPS Maps.
Click Setup Lat Long Source (Figure 1:) to open the setup dialog (Figure 2) and match the input expressions to one of these types of GPS data sources:
Some ICS loggers have a GPS receiver that can log GPS data to a virtual "neoVI" network. The messages and their signals are predefined in Vehicle Spy's Messages Editor, Database view, neoVI network with ArbIDs $110 to $116. Click Load Expressions for neoVI GPS (Figure 2:) to set the input expressions for GPS Maps to match the neoVI network database signals.
Vehicle Spy can acquire data directly from a GPS receiver connected to a PC serial communications port. The link is setup on the Tools -> Options -> GPS tab. The GPS data is available in the Expression Builder under Misc/GPS. Click Load Expressions for connected GPS (Figure 2:) to set the input expressions for GPS Maps to match the Expression Builder Misc/GPS signals.
The GPS messages and their signals must first be defined in Vehicle Spy's Messages Editor Receive or Database views. Once defined, the GPS signals can then be assigned to the GPS Maps Latitude and Longitude expressions by clicking their fx button (Figure 2:) and using the Expression Builder. (Figure 4)
If the GPS data source* is a GPS Receiver or Vehicle ECU then GPS Maps can gate the GPS data to the neoVI network by transmitting database GPS messages $110 to $112. To enable the feature, set the checkbox ON for Add position message to message traffic on neoVI network. (Figure 2:) Select an Insert Rate (ms) to set the periodic rate of the neoVI network messages. If On Change Only is enabled then the messages are sent only when the data differs from the previous transmission.
