GPS/MapPoint VB Source Code

**stevieg** · 06-02-2004, 04:03 AM

Hiya

I've made a simple GPS/MapPoint application for anyone who wants to write their own VB app to capture and process GPS data.

EDIT: A version that doesn't need a MapPoint control is also available

It's not intended as a app to actually use in your CarPC but it is intended to help anyone who wants to get their app started quickly without having to work out how to do the GPS capture from scratch.

The code is licensed under the BSD License so you're not oblicated to release the source code of anything you make using my code. There may also be bugs in the code, if you find any feel free to tell me so I can update the code. I don't guarantee it to be perfect, but it should help get you started.

It's fully commented so you shouldn't have any problems working out what does what.

It is availble for download from http://www.stevieg.org/opensource

If you need an app to simulate GPS data while you are testing I can recommend 'GPSGate' - http://franson.biz/gpsgate/ which is $29 and also allows you to split your actual GPS as well if you want to make an app that runs alongside your usual Navigation software.

Thanks to James Warner for letting me look at his GPS/MapPoint source code to get the idea of how it's approached, however this was coded on a clean machine without looking at his source code with my own research and approach, none of his code is in this whatsoever.

Hope this helps someone

Steve

**Laidback** · 06-02-2004, 04:33 AM

Thanks, reference code is always handy!

**SilentAdmirer** · 06-03-2004, 05:07 AM

Hi Steve,
I have a question regarding the GPS init. "$PRWIILOG,RMC,A,T,1,0" . What is PRWIILOG Statement ? I tried searching on the net and only thing I could find was this page http://www.gpsinformation.org/dale/nmea.htm . According to the page $PRWIILOG is used for initialising gps reciever based on Rockwell chip. I thought that most of the new GPS reciever is based on SiRF or SiRF II chipset. The initialising string for SiRf is $PSRF . Can anyone tell me more about it ?

Regards
Satish

**stevieg** · 06-03-2004, 05:23 AM

Originally Posted by SilentAdmirer

Hi Steve,
I have a question regarding the GPS init. "$PRWIILOG,RMC,A,T,1,0" . What is PRWIILOG Statement ? I tried searching on the net and only thing I could find was this page http://www.gpsinformation.org/dale/nmea.htm . According to the page $PRWIILOG is used for initialising gps reciever based on Rockwell chip. I thought that most of the new GPS reciever is based on SiRF or SiRF II chipset. The initialising string for SiRf is $PSRF . Can anyone tell me more about it ?

Regards
Satish

I used it becaus e it was the command James Warner used to init the nmea device, I don't think it is neccessary though as RMC is supposed to be the minimum data required so all GPS devices should be sending it anyway, but if there is a chance they aren't then hopefully this might catch the device and make it start sending.