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Not sure on how to get started or looking for a workflow to get GeoMedia Smart Client up and running. Tutorials provide step by instruction on some of the most common configurations and workflows to get GeoMedia Smart Client configured up and running quickly.
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How to use GPS

by Technical Evangelist on ‎02-23-2018 01:21 AM (552 Views)

Prerequisite:

The claim GPS must be set to the specific role, before you have access to the plugin in the GeoMedia Smart Client. 

 

 

With the GPS Plugin, a user has the possibility to connect a GPS device with GeoMedia Smart Client and capture the current position. Click '''GPS Command''' StartGPSButton.png and you can start and stop the GPS Support. If you start the GPS Support the first time, the GPS settings dialog box will open. If the user has already worked with the GPS Support, GPS will start with the last stored settings. While GPS is active, the StartGPSButtonSelected.png will be selected.


GPS Settings Dialog

The GPS Settings dialog differs between two methods of getting your GPS position displayed in GeoMedia Smart Client.

  • Serial device
  • Windows Geolocation API


GPS Devices

Install your GPS Device and all applications that the GPS device needs to run. Be sure that the COM Port settings are correct, confirming the manufacturer's specifications. Activate the GPS device and be sure that there is a signal.


Leica CS25


The GPS Plugin for Smart Client was tested with the Leica CS25. There are two ways to use a Leica CS25. If you are using the Leica CS25 with the internal antenna, you have to set the following in your GPS Settings dialog box:

  • Device = SerialDevice
  • COM-Port = COM3
  • Baudrate = 38400

If you are using the Leica device with an external antenna, you have to install ZENO CONNECT on your Leica CS25. Follow the installation and user guide of the manufacturer. The following are the settings of the GPS Settings dialog box:

  • Device = SerialDevice
  • COM-Port = COM66
  • Baudrate = 38400


Note: Every GPS-Device that streams NMEA0183 Sentences over a COM-Port (minimum sentences are RMC, GGA, GSA).

For more information about NMEA sentences visit this site.

 

 

Serial device

 

GpsSettingsDialog.png

 

 GPS Device

Serial Device

You have to connect the GPS device via a COM port.

 Update Interval  Defines how often the GPS positions gets an update (in seconds). The value has to be an integer. For example: 10. That means that every 10 seconds the GPS position on your map gets updated.
 Mode  
Displays only the current position. If the position is updated, the last
point will be deleted.
Displays every valid update and keeps them in the GPS layer. Like the "ALL" mode, "Route" will keep all valid positions in the
GPS layer, but it will also linking them with a line.
250px-Current.png 250px-All.png 250px-Route.png
 Center to map  Check the box if you want to center the map of the Smart Client always the GPS gets an update.
GPX Export   Check the box if you want to store your GPS measurements in a textfile. A new window opens where you can define the storage location of this textfile.
Trace   On the bottom of the Smart Client a data window opens, in which all the GPS measurements are displayed.
Port  Defines the port who is responsible for the data transfer between GPS device and GeoMedia Smart Client.
Baudrate   The symbol rate of the GPS device. Please read the manual of the device for detailed information about the baudrate.
VDop  Vertical Dilution of precision.
HDop   Horizontal Dilution of precision.
Threshold You can define the maximum value for HDOP respectively VDOP which should be displayed in GeoMedia Smart Client respectively should be written into the GPX file.

In principle it works like a filter.

For example: You define the value 2 for HDOP and Disabled (unbounded) for VDOP. So every measurement which has an HDOP value of 2 or lower will be displayed or written.

Because you haven't defined a maxmimum value for VDOP the filter isn't working for it.

Scalefactor

Defines the display size of the HDOP respectively VDOP value.

 

Note: Scalefactor adjusts just the visualization of the DOP values.

Start GPS Store your settings and changes and GPS support will start.
Close Exit the GPS settings dialog box without storing the changes and settings.
Delete Delete all GPS measurements on the GPS layer in the Smart Client.


Dilution of Precision

 

Dilution of Precision (DOP) is a term specifing the geometry of visible satellites. The DOP can be seperated into a few individual measurements. HDOP, VDOP, TDOP, PDOP, GDOP are respectively Horizontal, Vertical, Time, Position (3D) and Geometry (3D+Time) Dilution of Precision. For Smart Client two of this DOP values are used. The HDOP and the VDOP. The following table shows what the numbers mean:

 

< 1 Ideal Highest possible precision
1 - 2 Excellent Meet all but most sensetive applications
3 - 6 Good Positional measurements could be used to make reliable in-route navigation suggestions to the user
7 - 8 Moderate Could be used for measurements. A more open view to the sky is recommended.
9 - 20 Fair Just for a very rough estimate for the current location.
> 20 Poor Discard the measurements. Your measurements are precise just within a football field.



 

Windows Geolocation API

 

geolocation.PNG

 

GPS Device

Geolocation API

You have to connect the GPS device via a COM port.

 Update Interval  Defines how often the GPS positions gets an update (in seconds). The value has to be an integer. For example: 10. That means that every 10 seconds the GPS position on your map gets updated.
 Mode  
Displays only the current position. If the position is updated, the last
point will be deleted.
Displays every valid update and keeps them in the GPS layer. Like the "ALL" mode, "Route" will keep all valid positions in the
GPS layer, but it will also linking them with a line.
250px-Current.png 250px-All.png 250px-Route.png
 Center to map  Check the box if you want to center the map of the Smart Client always the GPS gets an update.
GPX Export   Check the box if you want to store your GPS measurements in a textfile. A new window opens where you can define the storage location of this textfile.
Trace   On the bottom of the Smart Client a data window opens, in which all the GPS measurements are displayed.
Position Source
  • satellite: within approximately 10 meters
  • Wi-Fi : between approximately 30 meters and 500 meters
  • cellular : between approximately 300 meters and 3,000 meters
  • IP address : between approximately 1,000 meters and 5,000 meters
Desired Accuracy

Set the value of the your desired accuracy. If the accuracy is worse than the set value, you won't get a point at all in the map. 

 

Note: Please consider the position source defining the desired accuracy. For example it makes no sense that you want to have a accuracy of 10m and you set the position source to IP address.

Movement Threshold You can define the maximum movement of your GPS positions within the map. If the new GPS position is too far away from the last point you won't get a new point in the map at all.
Symbol scaling factor

Defines the display size of the position.

 

Note: Scalefactor adjusts just the visualization of the points in the map.

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