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Accurate Elevations for France ?

r@m

r@m

Active Member
Pixelchaser said:
may I ask what you are going to model exactly?
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C'etait Un Rendevous, I'll be posting a WIP as soon as I get the general layout done.

Pixelchaser said:
edit, having looked at that app. id watch out. I cant help think its maybe not what you want. but a gps device in general will help. but a proper one !
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[/QUOTE]

Yeah from what I can find out all consumer GPS devices are pretty inaccurate, looking into DGPS now.
Differential GPS is supposed to be more accurate, and bloody expensive!

Think I'll just go to France for a few days and eyeball it all with a camera.
 
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Pixelchaser

Pixelchaser

Well-Known Member
one thing I have done is load up some gps from a trackday driver in Utah into google earth, the XY from google is always generally wrong anyway, but I had the gps which did measure the heights and whilst I didn't use it, I'm sure it would have been relatively accurate. it was the rest of the data I was unhappy with not the gps. and it wasn't the gps line I would use, but the relationships between like 1 turn to the next regards any inclines or declines etc.
 
luchian

luchian

Administrator
Staff member
r@m said:
C'etait Un Rendevous
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Hahaha, crazy idea :) ! I have lived in Paris a few years but in our days it's impossible to do something like that run, even at 3am :D. It's full of cars every time, especially the #peripherique. So a virtual version would be very fun to "practice" :). Good luck and have fun.
 
r@m

r@m

Active Member
luchian said:
Hahaha, crazy idea :) ! I have lived in Paris a few years but in our days it's impossible to do something like that run, even at 3am :D. It's full of cars every time, especially the #peripherique. So a virtual version would be very fun to "practice" :). Good luck and have fun.
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I've been meaning to do this for years, the level of work involved always put me off, but yeah it's a good burn and I'll probably expand it to other areas of Paris as well.

Willy Wale said:
Oh nice one. Don't forget the pigeons.
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Yeah I was wondering about that, what animation possibilities are there for the effect ? I know in one track there are aeroplanes that fly across the sky, but so far I've found no information on timings / speed etc, and had no success animating anything other than using the flag shader, which would be a cheap effect for this.
Also AI seems very limited for "other traffic" although I haven't really looked into any of this yet.
 
r@m

r@m

Active Member
I just found a pic of the champs, maybe the elevations I found aren't so "off" after all, you just don't see this in google street maps, I didn't realise the slope was that pronounced.

25m drop seems pretty close.

upload_2017-7-1_13-2-51.png
 
Pixelchaser

Pixelchaser

Well-Known Member
you know you can create a kml from google. and take it elsewhere and add the heights. from google but not through google services ?

this is old video, but its similar process, possibly in more updated software. your search parameter should be "adding height to KML" this route builder program is mainly for gps too btw.
 
r@m

r@m

Active Member
Yeah I've been through all that, they all give similar but "vague" results, all good enough for a starting point but all in need of some tweaking.
As this is the first map I've ever attempted I'm still undecided on the best approach, after faffing about for days I'm going to try a street by street approach instead of trying to do the whole thing at once, it gets messy real quick otherwise ;)
 
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Pixelchaser

Pixelchaser

Well-Known Member
to me a real road is just a real road. it doesn't need the nuances a race track has. I also think where real roads come into play, everything else is actually more important. mainly because real roads are designed to be driven safely and can be driven without even thinking about it. when we drive up champs elysees, were looking at the hookers, the street performers and art, and the lovely French ladies. not the road :lol:
 
r@m

r@m

Active Member
Paris streets are cobbly and bumpy,weird and wonky, subtle nuances with pits and falls, irregular widths, no street is the same, when you watch the rendezvous video the suspension is working overtime.
This is why true elevations are going to be a challenge...lots of soft selection and pulling of verts, and yet another reason to spend a few days in France :D
 
r@m

r@m

Active Member
No point really, same elevation data as all the other sites:

"Nasa's 90m resolution SRTM data is used for the application."

I'm good with the elevations, really, nothing is accurate enough, I'm fine with using it as a rough estimate and eyeballing the rest.

thx
 
r@m

r@m

Active Member
This is what bugs me about GE, when you use photo-realistic 3D buildings the elevation levels are there, you can visually see all the subtle 1 to 2 meter level changes, much more accurate than when exporting terrain elevations or kml lines.

The kml elevations follow the old STRM data, maybe one day it will follow the new 3D building layer.

There's no way to get the building layer either, I've tried all the old methods using 3Dx ripper and the new data is ignored, I've yet to find a tool that will pull the data out of memory.


upload_2017-7-6_10-53-59.png


upload_2017-7-6_11-0-25.png
 
Fat-Alfie

Fat-Alfie

New Member
I'm using free LIDAR of France for my Circuit Clermont-Ferrand.

Are you sure that none exists for Paris?
 
r@m

r@m

Active Member
Yeah I looked there weeks ago, there's no data for Paris or it's surrounding areas.
 
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