Mapping with a GPS and VB.NET

Fantastic! I am so grateful!

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hi! I read this article just now and it is very interesting. I just hope you sleep much more than time screenshoted from your desktop posted here! ;)

Hi there, Are you able to explain what difference it makes to process the GPS data using a timer.Tick event, rather than handling it in the serialPort.DataReceived event? I have always used the latter but sometimes encounter problems, so am looking at alternative methods. Thanks! Gemma

Hi, It is a nice article which is useful for students who are working on GPS and to learn new programming language.I had one question about this.Since this article is based on serial port to usb adapter.Instead of serial port if I use garmin gps 18x USB and use same code written by you,will it give me same NMEA string output sentences,latitude and longitude positions as same as serial port. Also If I use Garmin gps 18x usb,can the code be same as yours or do I need to do any modifications.If so could you please tell me those modifications.

I hope I am wrong about this and if not, I hope others have already made the correction. The VB code to convert the NMEA Lat and Lon is incorrect and will yield wrong answers. I thought I would try the code out yesterday and upon inspection, noticed a problem with the way the author calculates the numbers. Longitude = lineArr(5).ToString() + lon(0).ToString() + "." + ((Convert.ToDouble(lon(1)) / 60)).ToString("#####") You know what is wrong with this? If you have 8005.494,W as your NMEA Longitude, watch what happens. 8005.494 / 100 = 80.05494 Splitting the two you get 80 and 05494 The above line of code then divides 05494 by 60 which gives you 91.56 You then combine your numbers together to yield W80.91 Your answer is wrong because you lose the zero in front of your 5494. You should not do your calculation this way anyway. You should be doing 0.05494 / 0.6 = 0.091566 Now add 80 + 0.091566 and you will come out with "W 80.091566" I hope I am wrong and someone can prove me wrong. If not, I wonder how many people have used this code without double checking the results.

Hi, May I know how to get GPS coordinates from GPS device using bluetooth on VB.NET Pocket PC ? Please advise on the coding for bluetooth connection and information retrieval. Thank you. With Regards, Andreas Kok

I am getting an error saying that "StringBuilder()" is not defined. I have typed in all the code given here. Am I missing something? Thanks.

I would like to know what port to use if my gps only has a usb connector and would all the code above have to be changed. I want to be able to take my gps readings and place them on google maps and my own maps, is that possible? I am not very well versed in programming, and would like to be able to just build something I could have as a stand alone page. Thanks for information and I like the stuff you are doing. Rich Z

I would like to know what port to use if my gps only has a usb connector and would all the code above have to be changed. I want to be able to take my gps readings and place them on google maps and my own maps, is that possible? I am not very well versed in programming, and would like to be able to just build something I could have as a stand alone page. Thanks for information and I like the stuff you are doing. Rich Z