Re: Finding an address for a truck firm

( snipped-for-privacy@quickwatchsales.com) gurgled happily, sounding much like they were saying :

WAAS is not available in Europe. You may occasionally get a WAAS satellite signal, but because you're so far outside it's target area, it won't improve your accuracy.

Yeh, right. Maybe in the brochure it will. In the real world, however...

AIUI, military kit is more accurate as it can decode extra information transmitted from the "normal" GPS satellites.

So, you think that when told to 'follow up to' a group that isn't on its server that his client should pick one of the original groups to post to? Which one? At random? What if the one it picks also isn't carried?

Dave J ( snipped-for-privacy@freeuk.com) gurgled happily, sounding much like they were saying :

Erm, my understanding was that it would to *all* groups specified in the Newsgroups line. Am I incorrect?

So - how do I stop XNews slapping that bloody dialogue up, or what *should* I be using?

( snipped-for-privacy@quickwatchsales.com) gurgled happily, sounding much like they were saying :

Both.

It tells you when you are speeding according to it's internal database. Which was out of date before the database was converted to the internal format for the app before the app was tested before the app was approved for release.

Which was probably a couple of years ago. Some information in it will be even further out-of-date than that.

I'll bet there's *plenty* of roads it doesn't even think exist.

Trivial to jam locally, you can buy suitable equipment for 30 quid or so last time I looked. Probably best not to say how, but it happens through inexperience pretty often so not exactly hard to find out how.

( snipped-for-privacy@quickwatchsales.com) gurgled happily, sounding much like they were saying :

Exactly.

So - does it default to slamming the anchors on while on the motorway, or does it default to accelerating hard in the middle of a town centre?

I've seen this suggested, and it makes sense.

The message from Adrian contains these words:

Any minute now, someone's going to say it defaults to the speed limit for the road it's on. (insert smiley of choice here)

Me too.

Doubtfull. After all, it's not happening.

The message from snipped-for-privacy@quickwatchsales.com contains these words:

If you read Galileo's original prospectus, independance from US policy was one of the original objectives. They also didn't like the US keeping all the infrastructure hardware jobs in the US.

That's incorrect.

Some years ago you would have been right but Egnos is working right now and has been for what is probably now years. It is easy to test and the waas SV numbers are Egnos ones. The accuracy I have seen when I've tested it (and you needs nothing clever to test the accuracy) is about 1.3M cluster and 2M 75%

This is significantly better than the 7M cluster and 10M 75% I can get with waas disabled.

Check out google and you will find out for yourself, this is an evolving technology.

In the real world it will be a commercial undertaking that assures the accuracy within limits as I have described it, which is some way more than the navstar system offers.

Tell me I'm wrong in 2010...

Military kit is not using anything more accurate than the commercial stuff.

E.g.

I'd guess it assumes you are on the same road and keeps the speed limit the same until coverage is out for a long time and the roads available to you given your progress begin to allow slower ones, and in either case the car would become progressively limited to cover these situations. All the while, a big red dash light would be warning you that you have to go back to the main dealer for an engine check.

There are stupendously sophisticated opportunities for car manufacturers to take advantage of here. Instead, the end users are worrying about getting a ticket from the spy in the dashboard.

Ta :-)

In car sat nav works fine 99.9 percent of the time yet is at the mercy of accurate mapping and around where I live new roads are appearing all the time. It doesn't however render the sat nav useless.

At the moment we have point of interest (POI) which can be downloaded onto sat nav systems to warn us of speed cameras. The next step is a UK or EU wide speed limit database such that the display can show the authorised speed limit for the road you are on. The next logical step is user controlled speed limiting where the driver can choose to allow the inbuilt speed limiter to observe those limits. And later on the system would be mandatory - ie the driver could not switch if off.

In all situations ISA does not have control over the brakes. It does not brake the vehicle. Neither does it accelerate the vehicle when the limit increases. It merely prevents powered speeds above the speed limit.

Are you deliberately being obtuse?

The question is not one of accurate mapping (although that is an issue as well) it is one of maintaining an accurate database of all speed restrictions on all roads in the UK. Changes to these restrictions occur on a daily basis. Not only that, but the restrictions themselves are not recorded accurately, the reference made tends to be something like "A 30 mph restriction commencing 300 yards before Scoggins Lane". This leaves open the question of where the datum is for Scoggins Lane, and also makes entering the data onto a database difficult because that text description has to be changed to a set of geographical coordinates and that cannot be done in software at present.

Navigation works reasonably well if some information is missing. A system which takes control of the car i.e. a safety critical system should not rely upon incomplete, inaccurate or even vague data.

If you can't see why not then I despair.

David B ( snipped-for-privacy@daveb07890.fsnet.co.uk) gurgled happily, sounding much like they were saying :

So how do you plan to overcome people coming up to a 30 limit from an NSL, and just dipping the clutch to coast through at 60?

You don't foresee a large percentage of car operators (I can't bring myself to call them drivers) having their foot planted at all times?

( snipped-for-privacy@quickwatchsales.com) gurgled happily, sounding much like they were saying :

OK, it looks like EGNOS finally went live this July. I stand corrected.

That or I'm probably tired hence the post late into the evening.

All your points are true. The accurate mapping of all speed limits everywhere in this country is a difficult task. In fact the scenario could occur where if mapping were only accurate for main roads, drivers would resort to using less suitable back roads which haven't been surveyed properly at the top speed the system would allow for a non dual carriageway road - 60 mph.

Anyway I don't think we should have a full implementation of a system like that. If we have it at all it should start by only enforcing speed restrictions such as those on motorway road works and variable speed limits such as those on the M25. The next stage would be to try it out in the current congestion charge zone in London where I think the speed limit is 30 mph within the zone anyway. Judging from the results of those will allow us to see if proceeding to a nationwide operation is viable.

If this system controlled the brakes which it wouldn't I could clearly see the safety aspect. But it only controls the application of power which can and will cause frustration and a false sense of security to untrained drivers using the system. Well whats the worse that can happen? Your car for some reason goes the same speed as a tractor? *ducks*