Board index FlightGear Development Scenery

[SOLVED] : Elevation difference betwen reality & scenery!

Questions and discussion about enhancing and populating the FlightGear world.

[SOLVED] : Elevation difference betwen reality & scenery!

Postby Amirreza Shakeri » Thu Sep 05, 2019 7:57 pm

Hello.

I don't know why there is a 50 meters difference between the scenery which i am working on, and reality.
I checked many airports and well-known mountains in my town. These all had this 50 meters difference in elevation.

Is that normal !!??

Thanks in Advance.
Last edited by Amirreza Shakeri on Fri Sep 06, 2019 12:06 am, edited 1 time in total.
Amirreza Shakeri
 
Posts: 8
Joined: Mon Aug 26, 2019 5:55 pm

Re: Elevation difference betwen reality & scenery!

Postby wkitty42 » Thu Sep 05, 2019 8:16 pm

it is normal when there's a 50 meter fault in the raw data numbers... remember, all of this is simply raw numbers in a database... these numbers come from various detection devices... some are more sensitive than others...

kinda like satellite photos... some can detect a pack of cigarettes sitting on a black table (fine resolution) but others may simply show a slightly lighter gray coloring on the table with nothing discernible (low resolution)...

does that make sense to you?
"You get more air close to the ground," said Angalo. "I read that in a book. You get lots of air low down, and not much when you go up."
"Why not?" said Gurder.
"Dunno. It's frightened of heights, I guess."
User avatar
wkitty42
 
Posts: 5773
Joined: Fri Feb 20, 2015 3:46 pm
Location: central NC, USA
Callsign: wk42
Version: git next
OS: Kubuntu 14.04.5

Re: Elevation difference betwen reality & scenery!

Postby Amirreza Shakeri » Thu Sep 05, 2019 8:40 pm

Thank you wkitty.
Yes. Ofcourse that does.

But you know. The point is that i have two source of data. One of them is the pre compiled scenery which i downloaded form official flightgear scenery that used in simulation.
The other one is elevation data that i downloaded form viewfinderpanoramas.org ( as you know this is the site which flighgear used to make scenery file).
But surprisingly i discovered that altitude difference between two data sources is 400 meters.
I've been confused!!!
Amirreza Shakeri
 
Posts: 8
Joined: Mon Aug 26, 2019 5:55 pm

Re: [SOLVED] : Elevation difference betwen reality & scenery

Postby Amirreza Shakeri » Fri Sep 06, 2019 12:16 am

At first i mosaiced terrain tiles using ArcGis.
Apparently mosaicing tiles changes elevation data values which is undesirable.
Amirreza Shakeri
 
Posts: 8
Joined: Mon Aug 26, 2019 5:55 pm

Re: [SOLVED] : Elevation difference betwen reality & scenery

Postby statto » Tue Sep 10, 2019 10:54 pm

Which airport is closest to this problem?
Custom Scenery available from http://www.stattosoftware.com/flightgear
statto
 
Posts: 2112
Joined: Fri Jan 25, 2008 9:57 pm


Return to Scenery

Who is online

Users browsing this forum: No registered users and 1 guest