topic Re: Problem with ArcPad compass in ArcPad Questions

Problem with ArcPad compass

JasonWeber — Fri, 27 May 2011 00:40:03 GMT

Hi Everyone,
I use ArcPad version 8 on a Nomad (Trimble) and am having problems with the compass. The compass and screen position icon arrow constantly change direction which make navigation with this device nearly impossible. This occurs even though we have a strong satellite fix and are on flat as well as open ground. The actual location of the position icon is still correct though. Does anybody have any idea what would cause this and how to solve this problem.
Thanks.

Re: Problem with ArcPad compass

MarietteHachey-Boudreau — Fri, 27 May 2011 13:59:14 GMT

I am using ArcPad 10 on a GRS-1(topcon) and i am having the same problem.
I have found that for using a go to function, as long as you are walking the compass needle will be steady.
But if you are standing still the compass needle almost spins.
This puts in the question the bearing reading when you take a photo.

I am wondering if the compass needs to be calibrated in ArcPad or if the hardware needs to be calibrated.
I cant seemed to find the answer.

Re: Problem with ArcPad compass

PeterBold — Sun, 29 May 2011 16:02:39 GMT

I think the problem is that ArcPad calculates the compass information from the GPS signals it gets. If you don't move, it can not calculate a compass information - it is not like using a magnetic compass.

Re: Problem with ArcPad compass

Anonymous User — Tue, 31 May 2011 06:11:44 GMT

Hello

This compass is really useless. The problem is with ArcPad not with GPS signals. Even Iphone has a better compass.

Re: Problem with ArcPad compass

CraigClouet — Thu, 16 Jun 2011 00:22:13 GMT

ArcPad is Software. The Iphone is a hardware device that has a compass chip built in. It is only when the GPS units are equiped with a compass chip simular to the iphone that this issue can be overcome.

Re: Problem with ArcPad compass

DaveChamberlin — Thu, 23 Jun 2011 14:12:34 GMT

Technically there is no compass at all on the gps unit or in arcpad. Correct, it is based off GPS signals when movement is detected. Standing still, the accuracy of the gps unit is directly linked to what is posted on Trimbles site. if it says the unit receives 2-5 meters raw, then satellites will say you are at x, then y, then z, all within a 15 foot circle. thats why the compass in arcpad spins...making navigating back to a point difficult in some aspects.

Re: Problem with ArcPad compass

Anonymous User — Sun, 26 Jun 2011 07:18:59 GMT

ArcPad is Software. The Iphone is a hardware device that has a compass chip built in. It is only when the GPS units are equiped with a compass chip simular to the iphone that this issue can be overcome.

Hello Craig

I use trimble Juno and GeoXT 2008. Do you mean that both these devices do not have compass chips? Can you suggest a windows mobile device with compass chip? Will ArcPad compass work correctly with such a device?

Regards
Yashwant