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<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2>Based
on the documentation of the GPS software, the GPS can run in four different
modes,</FONT></SPAN></DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff
size=2>Complementary Wireless Positioning (CWP) - This is based on the location
of the country and/or the GSM base station location. It does not use the
onboard GPS at all, but depends on the SIM card.</FONT></SPAN></DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><FONT face=Arial color=#0000ff size=2>Assisted
Complementary Wireless Positioning (ACWP) - This is similar to CWP but
requires a network connection to get better information about the GSM base
station location</FONT></SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010>Global Navigation Satellite System (GNSS) - This uses
the GPS receiver. It does not require a network connection or a SIM
card.</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN class=140404512-14022010>Assisted Global Navigation
Satellite System (AGNSS) - This uses the GPS receiver, but gets additional
information from a SIM card or Network connection. It works basically the
same as GNSS, but since it starts with a good guess at the location is often
faster on startup than GNSS.</SPAN></FONT></SPAN></SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN
class=140404512-14022010></SPAN></FONT></SPAN></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN class=140404512-14022010>I had a little fun writing
some software for the N900 to track a drive I took a while ago. All of the
data was extracted using AGNSS and saved to a file which I loaded into Google
Maps. You can see the map of my trip, as well as read about the
programming I did at</SPAN></FONT></SPAN></SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN
class=140404512-14022010></SPAN></FONT></SPAN></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN class=140404512-14022010>#N900 - My New
Gps</SPAN></FONT></SPAN></SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN class=140404512-14022010><A
href="http://www.orient-lodge.com/node/3884">http://www.orient-lodge.com/node/3884</A></SPAN></FONT></SPAN></SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN
class=140404512-14022010></SPAN></FONT></SPAN></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN class=140404512-14022010>(The link to liblocation in
the blog post is where you can also read more information about the various GPS
modes)</SPAN></FONT></SPAN></SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN
class=140404512-14022010></SPAN></FONT></SPAN></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=140404512-14022010><FONT face=Arial color=#0000ff size=2><SPAN
class=140404512-14022010><SPAN class=140404512-14022010><FONT face=Arial
color=#0000ff size=2><SPAN
class=140404512-14022010>Aldon</SPAN></FONT></SPAN></SPAN></FONT></SPAN></DIV>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
maemo-users-bounces@maemo.org [mailto:maemo-users-bounces@maemo.org]<B>On
Behalf Of </B>Dawid Lorenz<BR><B>Sent:</B> Sunday, February 14, 2010 7:43
AM<BR><B>To:</B> Bernard Tyers<BR><B>Cc:</B>
maemo-users@maemo.org<BR><B>Subject:</B> Re: Bad experience with N900 onboard
GPS.<BR><BR></FONT></DIV><BR><BR>
<DIV class=gmail_quote>On 14 February 2010 09:12, Bernard Tyers <SPAN
dir=ltr><<A
href="mailto:b@runningwithbulls.com">b@runningwithbulls.com</A>></SPAN>
wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">
<DIV class="ii gt" id=:1n4>No, I don't have a connection to the Internet
when using Ovi Maps-thats the exact reason why I use Ovi Maps.<BR><BR>You
shouldn't be expected to use a network connection with an onboard
GPS.</DIV></BLOCKQUOTE></DIV><BR>True, but afaik N900 has A-GPS onboard, which
is assisted by supplementary GPS data downloaded via internet. Without that
connection it probably sucks badly, as you could experience. I am no expert on
GPS, but that's how I understand A-GPS chipsets are working.<BR
clear=all><BR>-- <BR>Dawid 'evad' Lorenz * <A
href="http://adl.pl">http://adl.pl</A><BR><BR>null://I would love to change
the world, but they won't give me the source code </BLOCKQUOTE></BODY></HTML>