הכרזת מפת גובה דיגיטלית - ASTER GDEM v2

[Chris Bell]

הכרזת מפת גובה דיגיטלית

משרד כלכלה, מסחר והתעשייה (METI) של יפן וארצות הברית התעופה הלאומית שטח המנהל (נאס"א) הודיע ​​במשותף על שחרורו של הפליטה המתקדמת Spaceborne התרמית וגרסת ההשתקפות מדי קרינה (Aster) Global Digital Elevation Model 2 (GDEM V2) ב -17 באוקטובר, 2011.

 

שיפור GDEM V2 מוסיף 260.000-זוגות סטריאו נוספים, שיפור כיסוי ומפחית את התרחשותם של חפצים. אלגוריתם הייצור המעודן מספק רזולוציה מרחבית השתפרה, גדל דיוק אופקי ואנכי, וכיסוי מעולה כמות מים בגוף וזיהוי. Aster GDEM V2 שומר פורמט GeoTiff ואותו gridding ומבנה אריח כמו V1, קטעים ב30-מטר ו1 1 x אריחי תואר.

גרסה 2 מראה שיפורים משמעותיים במהדורה הקודמת. עם זאת, משתמשים מומלצים שמכילים נתוני אנומליות וחפצים שמעכבים אפקטיבית לשימוש ביישומים מסוימים. הנתונים ניתן "כפי שהם", ולא נאס"א ולא METI / יפן מערכות חלל (J-spacesystems) תהיה אחראית לכל ניזק שייגרם משימוש בנתונים.

כתרומה מMETI ונאס"א למערכת הגלובלית כדור ארץ התצפית של מערכות (GEOSS), נתוני Aster GDEM V2 זמינים בחינם למשתמשים ברחבי עולם.

 

מוצר אסטר זמינה ללא תשלום לכל משתמש על פי הסכם בין METI ונאס"א. למידע נוסף על GDEM

 

http://asterweb.jpl.nasa.gov/gdem.asp

 

i have converted Aster GDEM V2 Mesh for use with flight Sim

my new converted Mesh can be downloaded here

 

ASTER GDEM v2 - 33.8 MB

https://mega.co.nz/#!D5x22DqZ!QTX5Cib8C3j4vANzCiX08QGdFktNYaHRs9Rl3XJN048

 

this is the most up to date Terrain Mesh for israel

this replaces a very old (over 10 years) SRTM90 aka SRTMv1

 

Tested successfully under FSX

 

Enjoy

 

 

Aster GDEM v2

 

 

 

SRTM90 v1

 

 

 

 

 

 

 

 

Comparison between ASTER GDEM and SRTM

[Liaz Kamper]

Hey Chris,

 

Thanks again. Every day is a new surprise with you around.

 

What are the advantages of the new mesh, apart from the fact it's newer? Is it more accurate?

 

My concern is about the compatibility with the sceneries, especially Ben-Gurion X. 

[Chris Bell]

YVW Liaz, My Pleasure

 

the new Mesh aside from being new

will result in a much greater detail throughout the land

 

this will contribute to a deeper 3D experience

and just in general a more accurate terrain then SRTM

 

(SRTM is a lower resolution sampling to Alt 90m (looking top down

 

you can see the differences very easily with the pics i posted

download them to your desktop, then scroll through them by pairs

you will instantly notice the differences between the new GDEM and older SRTM

when you flip the same pic back and forth

 

(GDEM v2 Samples to 30m Alt (again looking top down

 

you can read more about the technical aspects of GDEM by hitting the link under the quote

 

ive been sitting on these files for some time new

i didn't had the time/need to convert them till last night

 

i got pissed at SRTM90 making me do so many correction to the red Sea terrain to correct it

i figured it will take me less time to get the GDEM converted than to repair Red Sea terrain

 

as for compatibility with exciting scenery and objects, should be seamless

expect minimal if any ill effects

[Chris Bell]

you can spot the difference easily with these pics
 
at the top is SRTM90 v1, at the bottom Aster GDEM v2
both showing Masada mountain ridge and few up ahead

you clearly see SRTM90 v1 detail compared to Aster GDEM v2
which delivers a much more refinement to the terrain
 
SRTM 90 v1


Aster GDEM v2

[Ittai Arnon]

Chris,

 

I agree with Liaz !

Thanks for the all great work !

 

No workd to express... 

[Chris Bell]

YVW Ittai

    just making sure you have something to do when you get back

[Joel Strikovsky]

How is this new Mesh compared to the MESH by FSGLOBAL Ultimate Africa/EUROPE?

I have this product.

is it worth replacing it?

[Chris Bell]

i didn't install FSG EUR

i believe Moshe has experience with FSG EU

not sure if he is running GDEM yet, he might have a better idea about this

 

i do have FSG US and i disabled all their LM libraries

this resolved all ORBX and many other mesh issues

 

!IMO, yes

disable FSG LM

use at least SRTM90 or better yet the latest ASTER GDEM v2

[Chris Bell]

Comparison between ASTER GDEM and SRTM

 

 

 

http://www.jspacesystems.or.jp/ersdac/GDEM/E/2.html

[Stav Sitnikov]

Hi after install of ASTER GDEM i see LLHZ elavated above the ground neer it , any idea how to fix this ?

[Chris Bell]

as expected, since this mesh is more accurate some airports may need to be adjusted

i haven't run into this one yet, ill take a look with what i have here

 

?how bad is it, can you post an image

 

which LLZ are you running

 

i believe a new LLHZ should be available shortly

Bar Rodoy is working on somthing

[Chris Bell]

working on Eilat City mesh correction/flattening for GDEMv2
This is GDEMv2 with Photoreal and default plain vanilla FSX no mesh corrections what so ever

airport elevation 14.1m

 
 
(in these you can see GDEMv2 with LLET+ LLET's scenery elevation fix (AFX_LLET_ALT.bgl
with my GDEMv2 elevation and flattening correction

airport elevation 6.2