How to connect the GPS device (Leica CS25) to the lab top,

[JamalNUMAN]

How to connect the GPS device (Leica CS25) to the lab top,

In principle, I???m wondering if there is a way to connect the GPS device (Leica CS25) with the lab top such that one can use the ArcPad installed in the lab top instead of using the ArcPad installed in the tablet of the GPS device.

[ATTACH=CONFIG]27580[/ATTACH]

Is there a way?


Thank you

Best

Jamal

[BrettBlack]

Are you using a GG03 or GG02 plus with the CS25 unit or just the SiRF chipset in the CS25 unit? If using the GG03 or GG02 plus, then it is possible through a product called Zeno Connect. Zeno Connect would be installed on the laptop, then a bluetooth or cabled connection to your GG03/GG02 plus unit.

[JamalNUMAN]

Are you using a GG03 or GG02 plus with the CS25 unit or just the SiRF chipset in the CS25 unit? If using the GG03 or GG02 plus, then it is possible through a product called Zeno Connect. Zeno Connect would be installed on the laptop, then a bluetooth or cabled connection to your GG03/GG02 plus unit.

Thank you Brett for the very useful answer. Sound that I need to purchase the �??Leica Zeno Connect�?� software to be able to connect my GPS device with the laptop.

http://www.leica-geosystems.com/en/Leica-Zeno-Connect_103102.htm

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If I manage to install the �??Leica Zeno Connect�?�, will I be able to have the �??capture point�?�, �??capture vertex�?� and �??capture vertices�?� grayed on?

[ATTACH=CONFIG]27620[/ATTACH]

[BrettBlack]

Are you using the GG03 or GG02 plus? If not, then Zeno Connect will not be needed. If you are only using the internal SiRF GPS chipset, you can set your COM settings accordingly. If you are using the GG03 or GG02 plus, then yes, Zeno Connect will handle the configuration of the GG0X unit as well as configuring the NMEA sentences for use in ArcPad.

[JamalNUMAN]

Are you using the GG03 or GG02 plus? If not, then Zeno Connect will not be needed. If you are only using the internal SiRF GPS chipset, you can set your COM settings accordingly. If you are using the GG03 or GG02 plus, then yes, Zeno Connect will handle the configuration of the GG0X unit as well as configuring the NMEA sentences for use in ArcPad.

Many thanks Brett,

Sounds that the �??GG03�?� and �??Zeno Connect�?� come as optional features

[ATTACH=CONFIG]27645[/ATTACH]

Then do I need to purchase hardware (GG03) and software (Zeno Connect) just to get my GPS device (leica CS25) connected with my laptop/tablet machine?

[BrettBlack]

If you are not using a GG03, then Zeno Connect is not needed. I just was not sure of your configuration.

I am confused to why you would want to port the GPS of the CS25 tablet to another laptop or tablet? Why not install the software on the CS25 unit? The internal GPS of the CS25 unit is on COM 3, with a baud rate of 38400. So if your software was on the CS25 unit, you'd make the appropriate COM port and baud rate settings.

Depending on the age of the unit, there is either a MiniGPS or U-Center application installed that manages the NMEA data. You may be able to utilize it to relay the data to a bluetooth port or the serial port, but it is unlikely.

[MarcoBoeringa]

Then do I need to purchase hardware (GG03) and software (Zeno Connect) just to get my GPS device (leica CS25) connected with my laptop/tablet machine?

Another question is if you are aware of the accuracy achievable with and without an external GPS antenna like the GG03, and whether that plays a role in your decision, or need, for extra hardware.

Looking at the specs for the Leica-CS25, it seems the CS25 will only achieve a 2-5 meter accuracy on its internal GPS antenna (and that is corrected by an external augmentation signal as WAAS in the US or EGNOS in Europe). If not using augmentation or DGPS, it will be worse.

If you need RTK/DGPS "survey" accuracy down to the cm level, it seems you either need to have the compact antenna that is provided as part of the Leica CS25 GNSS package (which will give you 10-20 cm accuracy when referenced to a base station, and is directly pluggable in the CS25 computer), or a bigger fully separate "pole type" GG03 L2 receiver, which should give you up to cm level accuracy when corrected by known references.

Depending on the age of the unit, there is either a MiniGPS or U-Center application installed that manages the NMEA data. You may be able to utilize it to relay the data to a bluetooth port or the serial port, but it is unlikely.

It probably is not of any direct help since the GPS unit is not in the laptop, but in the separate CS25, but it seems ArcGIS / ArcPad 10.2 has enhancements in this respect via new customization options using the Windows Locations API, and the new "Location Sensor" option in ArcPad based on this:

What is a location sensor?

What's New in ArcPad 10.2 (Video)

And see this for other ideas to directly tap into NMEA data (for those with electronics skills...):
GPS Test 1 - Reading NMEA Data using an Arduino

http://www.arduino.cc/

NMEA data

The internal GPS of the CS25 unit is on COM 3, with a baud rate of 38400. So if your software was on the CS25 unit, you'd make the appropriate COM port and baud rate settings.

It probably is easier to install ArcPad (Studio) on the the CS25, and do testing using live GPS there.

[JamalNUMAN]

Another question is if you are aware of the accuracy achievable with and without an external GPS antenna like the GG03, and whether that plays a role in your decision, or need, for extra hardware.

Looking at the specs for the Leica-CS25, it seems the CS25 will only achieve a 2-5 meter accuracy on its internal GPS antenna (and that is corrected by an external augmentation signal as WAAS in the US or EGNOS in Europe). If not using augmentation or DGPS, it will be worse.

If you need RTK/DGPS "survey" accuracy down to the cm level, it seems you either need to have the compact antenna that is provided as part of the Leica CS25 GNSS package (which will give you 10-20 cm accuracy when referenced to a base station, and is directly pluggable in the CS25 computer), or a bigger fully separate "pole type" GG03 L2 receiver, which should give you up to cm level accuracy when corrected by known references.



It probably is not of any direct help since the GPS unit is not in the laptop, but in the separate CS25, but it seems ArcGIS / ArcPad 10.2 has enhancements in this respect via new customization options using the Windows Locations API, and the new "Location Sensor" option in ArcPad based on this:

What is a location sensor?

What's New in ArcPad 10.2 (Video)

And see this for other ideas to directly tap into NMEA data (for those with electronics skills...):
GPS Test 1 - Reading NMEA Data using an Arduino

http://www.arduino.cc/

NMEA data



It probably is easier to install ArcPad (Studio) on the the CS25, and do testing using live GPS there.

Thank you very much Brett and Marco for the help. You input is very useful.

After verification, I have the following software\hardware in my Lieca CS25


1. Tablet: but couldn�??t know which part of it makes the connection with the GPS

[ATTACH=CONFIG]28974[/ATTACH]

2. Antenna GG03

[ATTACH=CONFIG]28975[/ATTACH], [ATTACH=CONFIG]28976[/ATTACH]

3. Internet connection

[ATTACH=CONFIG]28977[/ATTACH]


4. Zeno field & Zeno connect software






I couldn�??t figure out:

1. The accuracy of the measurement

2. How to connect it with reference station to improve the accuracy

[BrettBlack]

Have you registered an account with Leica My World yet? If not I would recommend doing so as you can register each serialized component and download manuals as well as the quick start guides for Zeno Field and Zeno Connect. Each of these quick start guides offer more information on configuration of the hardware and software.

Also, I would recommend contacting the dealer in which you purchased the equipment and requesting an on-site training session if the quick start guides do not get you operational.

Regards,

Brett

[MarcoBoeringa]

I couldn�??t figure out:

1. The accuracy of the measurement

2. How to connect it with reference station to improve the accuracy

If I look at the product folder for the GG03 here, it says that for the "integrated real time" SBAS correction (Satellite Based Augmentation System), your accuracy is about <0.9 meter. With correction against a known, surveyed, reference station as in DGNSS (Differential Global Navigation Satellite System), also called DGPS, you should achieve around 0.4 meter, depending on the distance between your reference point and the location where you are surveying. Lastly, with RTK, you should be able to get down to less than a decimetre, up to 1 cm.

So, without tying yourself to any ground based reference point as in DGNSS or RTK mode, you will have about 1 meter accuracy at best. Please note that for both DGNSS/DGPS and RTK, you need to be able to contact a known reference station. A lot of countries have government or commercially maintained reference networks for this, with fixed GPS receiver base stations broadcasting their positions and corrections (CORS - Continously Operated Reference Station). This may be a paid service in your area.

I don't know if Palestine has its own CORS network?, but these articles might be interesting for you:

The Permanent GNSS Network and its RTK Application in Israel
http://www.fig.net/commission5/wg52/ts01c_salmon_3248.pdf

Permanent GPS Network-based Measurement Practice in Israel
http://www.mapi.gov.il/UsefulInfo/MapiPublications/FIG2009_forrai_3496.pdf

As Brett says, some training might be in order...

*** EDIT ***
And as to the question how to connect to a CORS station, see these texts from the Wikipedia page about RTK:

"There are several ways to transmit a correction signal from base station to mobile station. The most popular way to achieve real-time, low-cost signal transmission is to use a radio modem, typically in the UHF band. In most countries, certain frequencies are allocated specifically for RTK purposes. Most land survey equipment has a built-in UHF band radio modem as a standard option."

"A Continuously Operating Reference Station (CORS) network is a network of RTK base stations that broadcast corrections, usually over an Internet connection. Accuracy is increased in a CORS network, because more than one station helps ensure correct positioning and guards against a false initialization of a single base station."