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PostPosted: Wed Aug 22, 2007 10:16 am 
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Joined: Fri Aug 10, 2007 5:55 pm
Posts: 58
Location: Ampang
GPS: Dopod 838 Pro/N73
I iBlue 737/10x
GMXT/Mapking
Hi all...

I'm using Dopod 818 pro + iBlue 737 btgpsr (MTK Chipset) + Mapking2007.
Overclock at 221MHZ.
Free mem before run mapking2007 arround 18 - 20MB.
After running Mapking2007, mem available 7 - 9MB.

The problem is "car" in the map moving slower by 2 seconds
while moving. I noticed if I'm really at the junction, the "car" inside the map is still
behind .
Driving not so fast la... just arround 80kph.

Also noticed when driving, example at 100kph, the indicator stated lest 10kph. (90+ kph).

is it natural?

how about garmin 10x ?

does it relate to PDA or BTGPSR performance? or Bluetooth . iBlue 737 only support 1.1 i guess.

:$gone: 10x :$gone: 60CSX :$gone:


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PostPosted: Wed Aug 22, 2007 10:36 am 
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Joined: Sun Aug 19, 2007 12:57 am
Posts: 110
GPS: Garmin GPS 10x + iPAQ hx2750 (Holux GPslim236 backup)
Running gps10x with que.. also 10kmh less..than speedo meter.

wait afterwards i am going ipoh kl highway.. check again and see.

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PostPosted: Wed Aug 22, 2007 10:55 am 
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Joined: Fri Aug 10, 2007 1:18 pm
Posts: 2
GPS: RX3715 + Iblue747
Hi
using 747 MTK chip seem to be the same Few KM/hr lag, SirRF 3 seem better.
Thanks


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PostPosted: Wed Aug 22, 2007 10:58 am 
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Posts: 58
Location: Ampang
GPS: Dopod 838 Pro/N73
I iBlue 737/10x
GMXT/Mapking
[quote="Chickencow"]Hi
using 747 MTK chip seem to be the same Few KM/hr lag, SirRF 3 seem better.

bro,how about the refresh rate? is it dtill behind the exact location while on d move?


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PostPosted: Wed Aug 22, 2007 11:43 am 
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Joined: Sat Aug 05, 2006 12:00 am
Posts: 105
Location: Shanghai, PRC
GPS: No GPS
pelurusilver wrote:
bro,how about the refresh rate? is it dtill behind the exact location while on d move?

I also got same refresh rate, about 1-2 second behind. My PDA speed is 416Mhz, i think it is faster enough. Maybe the communication between our PDA & satellite 1 or 2 second late. Anyone know? Please share.

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PostPosted: Wed Aug 22, 2007 11:58 am 
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Location: Shanghai, PRC
GPS: No GPS
pelurusilver wrote:
Also noticed when driving, example at 100kph, the indicator stated lest 10kph. (90+ kph).is it natural?

I think it is natural. I have 2 cars, One car when driving 110kph, the GPS show 112kph, another car when driving 110kph, GPS show 105kph. I think the GPS speed is accurate but our speedo meter not correct. For my first car I already reset the speedo meter to be almost accurate during driving :mrgreen: It is dangerous attempt, don try it at home :mrgreen: :mrgreen: How I do it? Tell u later... :mrgreen:

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PostPosted: Wed Aug 22, 2007 12:06 pm 
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Joined: Fri Aug 04, 2006 12:00 am
Posts: 77
Location: Sydney
GPS: Nuvi 310 (OZ)
pelurusilver wrote:
Hi all...

I'm using Dopod 818 pro + iBlue 737 btgpsr (MTK Chipset) + Mapking2007.
Overclock at 221MHZ.
Free mem before run mapking2007 arround 18 - 20MB.
After running Mapking2007, mem available 7 - 9MB.

The problem is "car" in the map moving slower by 2 seconds
while moving. I noticed if I'm really at the junction, the "car" inside the map is still
behind .
Driving not so fast la... just arround 80kph.

Also noticed when driving, example at 100kph, the indicator stated lest 10kph. (90+ kph).

is it natural?

how about garmin 10x ?

does it relate to PDA or BTGPSR performance? or Bluetooth . iBlue 737 only support 1.1 i guess.

:$gone: 10x :$gone: 60CSX :$gone:



(1) Speedometer, on stock car, is always more than actual speed.. So nobody can sue car manufacturer if they kenna speeding ticket.

(2) Updating of map has something to do with speed. Map update is usually 1 update per second.. and I think there are some algorithm inside that prevents the "car" from moving backwards or sideways all the time, within a small tolerance. Something like a stability program in your digital camera...

So you calculate yourself.. 90km/h, 1 second is how far apart..you will know how much error your map update is prone to.

you can try this.. on small roads, drive slowly, at 40km/h.. stop at a junction.. you will find it is more "accurate"...

I have even tried, when on active routing. I do e-brake.. the 'car' in my GPS show I am in the middle of the junction liao.. cos when you are routing, the alogorithm has "predictive" movements, as compared to when it is not routing and just updating your location..

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PostPosted: Wed Aug 22, 2007 12:22 pm 
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Joined: Fri Aug 10, 2007 5:55 pm
Posts: 58
Location: Ampang
GPS: Dopod 838 Pro/N73
I iBlue 737/10x
GMXT/Mapking
sotongkia wrote:
pelurusilver wrote:
Hi all...

I'm using Dopod 818 pro + iBlue 737 btgpsr (MTK Chipset) + Mapking2007.
Overclock at 221MHZ.
Free mem before run mapking2007 arround 18 - 20MB.
After running Mapking2007, mem available 7 - 9MB.

The problem is "car" in the map moving slower by 2 seconds
while moving. I noticed if I'm really at the junction, the "car" inside the map is still
behind .
Driving not so fast la... just arround 80kph.

Also noticed when driving, example at 100kph, the indicator stated lest 10kph. (90+ kph).

is it natural?

how about garmin 10x ?

does it relate to PDA or BTGPSR performance? or Bluetooth . iBlue 737 only support 1.1 i guess.

:$gone: 10x :$gone: 60CSX :$gone:



(1) Speedometer, on stock car, is always more than actual speed.. So nobody can sue car manufacturer if they kenna speeding ticket.

(2) Updating of map has something to do with speed. Map update is usually 1 update per second.. and I think there are some algorithm inside that prevents the "car" from moving backwards or sideways all the time, within a small tolerance. Something like a stability program in your digital camera...

So you calculate yourself.. 90km/h, 1 second is how far apart..you will know how much error your map update is prone to.

you can try this.. on small roads, drive slowly, at 40km/h.. stop at a junction.. you will find it is more "accurate"...

I have even tried, when on active routing. I do e-brake.. the 'car' in my GPS show I am in the middle of the junction liao.. cos when you are routing, the alogorithm has "predictive" movements, as compared to when it is not routing and just updating your location..



:-k mm... the logic is there. but why arr like that? gpsr should updated by satelite rite then push it to the pda/mobile.
seems like the satelite "overlooked" where the btgpsr meh.. :ko:

coz of that I missed 2 turn so far using this GPS. just driving 100kph in the highway. :fire:


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PostPosted: Wed Aug 22, 2007 1:14 pm 
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Joined: Thu Jun 09, 2005 12:00 am
Posts: 563
Location: Singapore
GPS: Nuvi 2565, Nuvi 255W, HP iPaq 3715 with Rikaline 6033 (retired), Mapking G10 (retired)
pelurusilver wrote:
:-k mm... the logic is there. but why arr like that? gpsr should updated by satelite rite then push it to the pda/mobile.
seems like the satelite "overlooked" where the btgpsr meh.. :ko:

coz of that I missed 2 turn so far using this GPS. just driving 100kph in the highway. :fire:


You are driving your car at 100kph.

You PDA is riding a bicycle trying to catch up.

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PostPosted: Wed Aug 22, 2007 1:28 pm 
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Joined: Fri Aug 10, 2007 5:55 pm
Posts: 58
Location: Ampang
GPS: Dopod 838 Pro/N73
I iBlue 737/10x
GMXT/Mapking
ace wrote:
pelurusilver wrote:
:-k mm... the logic is there. but why arr like that? gpsr should updated by satelite rite then push it to the pda/mobile.
seems like the satelite "overlooked" where the btgpsr meh.. :ko:

coz of that I missed 2 turn so far using this GPS. just driving 100kph in the highway. :fire:


You are driving your car at 100kph.

You PDA is riding a bicycle trying to catch up.

:D :D :D :D :D :D :D


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