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<DIV><FONT face=Arial size=2>Hello!</FONT></DIV>
<DIV><FONT face=Arial size=2>I think INM gives an overflow error 'cause 15 3tx
files are really too many!</FONT></DIV>
<DIV><FONT face=Arial size=2>For my study I used 2 of them, and in INM's example
study there's only one of them!</FONT></DIV>
<DIV><FONT face=Arial size=2>As you can see in INM's manual, a .3tx file
contains terrain elevations covering a one-by-one degree area. </FONT></DIV>
<DIV><FONT face=Arial size=2>B</FONT><FONT face=Arial size=2>elow there's a
description of the .3tx format.<BR><BR>The .3tx ASCII text format:<BR><BR>Lat
Long<BR>Elevation<BR>Elevation<BR>Elevation<BR>...etc...<BR><BR>where
<BR>-Lat is the latitude of SW corner (integer
degrees)<BR>-Long is the longitude of SW corner (integer
degrees)<BR>-elevation is terrain elevation MSL (integer meters)<BR><BR>The
first line in the file defines the southwest corner of the one-by-one degree
area.<BR>North latitude and east longitude are positive integers; south latitude
and west longitude are negative integers. The SW corner must be on integer
degrees.<BR>There must be exactly 1201*1201=1442401 lines following the first
line. Each line contains one number - the elevation, in integer meters, of the
terrain<BR>above mean sea level. The elevation of the SW corner is the first
integer, the elevation that is 3 arc-seconds to the north is the next integer,
and<BR>so on until the top edge (integer degree latitude) is reached. Then move
3 arc-seconds to the east, start at the bottom edge, put in another 1201
elevations while moving north, and so on until the file is finished.<BR>The
binary format (.3cd) is sold by Micropath for U.S. regions; non U.S. users must
manually write their .3tx ASCII text file, which INM software reads and converts
in a .3cd binary one, where the name is given by the Lat/Long specified at the
first line of the .3tx file.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>After that, INM converts ALSO the .3cd file into a
"terrain.bin" one, so with all these conversions is easy to have an
overflow!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>One important thing is to export in the right way
filling unknown areas in the elevation data, to do so follow these steps (I used
the "Europe" data at </FONT><A
href="http://www.ngdc.noaa.gov/seg/fliers/se-1104.shtml"><FONT face=Arial
size=2>http://www.ngdc.noaa.gov/seg/fliers/se-1104.shtml</FONT></A><FONT
face=Arial size=2>):</FONT></DIV>
<DIV><FONT face=Arial size=2>-drag Europe.hdr in VTBuilder window;<BR>-Click in
"Area Tool"--> "Numeric values" and fill "Origin and<BR>Size" with, for
example (12,00000000, 57,00000000), (1,00000000, 1,00000000), then click
"ok"<BR>-Go to "area tool"-->"Merge & Resample Elevation", select
"Output"-->"To File" and give as name N57E012 and desktop as destination
folder; then put in "Sampling"-->Grid Size" put 1201 in both
fields and press again "ok"; you'll find on
the desktop two files: N57E012.bt and N57E012.prj<BR>-Close
VTBuilder;<BR>-open it again and drag inside the windowi N57E012.bt;<BR>-Click
on "Elevation"-->"Fill in Unknown Areas" (this is very
important!)<BR>-At last: "Elevation"-->Export to..."-->
3TX</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Now try to import this file in INM, then do the
same with every 3tx you need, changing the coordinates, of course!</FONT></DIV>
<DIV><FONT face=Arial size=2>INM should give no problems this way (I hope...!).
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Bye</FONT></DIV>
<DIV><FONT face=Arial size=2>Davide</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=geckonews@web.de href="mailto:geckonews@web.de">Michael</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=emo.da@jumpy.it
href="mailto:emo.da@jumpy.it">Davide Borelli</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, March 10, 2006 2:09
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Freegis-list] 3CD or 3TX
data</DIV>
<DIV><BR></DIV>Hej Davide!<BR><BR>Thanks for the links, I downloaded some
files covering the surrounding <BR>of my airport. You were right about FAA's
INM that's exactly the tool I <BR>am working with! And you said I could ask
you if I got any questions... <BR>In fact I got some. I have a total of 15 3TX
files generated with <BR>VTBuilder (<A
href="http://vterrain.org/Doc/VTBuilder/overview.html">http://vterrain.org/Doc/VTBuilder/overview.html</A>)
from the <BR>downloaded data and wanted to import them into my INM study. I
just put <BR>them into a directory and imported them, but doing it this way
all parts <BR>will be in the same small rectangle and I got 15 layers one on
the <BR>other. Then I tried to enlarge the rectangle, according to the
<BR>dimensions I got. 3 rows with 5 squares each and each tile one by one
<BR>degree gives a rectangle of about 286km x 337km, with a offset for the
<BR>lower left corner according to my coordinate references. However doing
<BR>it like this INM always crashes due to an overflow...<BR>Do you got any
idea what I am doing wrong or how to do it??? I would be <BR>very happy about
any information you can give me. Do you perhaps know <BR>some tutorials or
workshops which are available on the web for INM? I <BR>didn't find anything
useful...<BR><BR>Thanks in advance!<BR><BR>Cheers and Greetings from
Stockholm!<BR>/Michael<BR><BR><BR>-------- Original-Nachricht --------<BR>Von:
"Davide Borelli" <<A
href="mailto:emo.da@jumpy.it">emo.da@jumpy.it</A>><BR>An: <A
href="mailto:freegis-list@intevation.de">freegis-list@intevation.de</A><BR>Betreff:
Re:[Freegis-list] 3CD or 3TX data<BR>Datum: 09.03.2006 09:51<BR><BR><BR>>
Hi!<BR>> I suppose you're using FAA's INM, isn't it?<BR>> I've just
finished my bachelor thesis on it and HNM!<BR>> For the data, you can try
<A
href="ftp://e0srp01u.ecs.nasa.gov/srtm/version2/Eurasia">ftp://e0srp01u.ecs.nasa.gov/srtm/version2/Eurasia</A><BR>>
these are SRTM files and you can learn about them at <BR>> <A
href="http://www2.jpl.nasa.gov/srtm/">http://www2.jpl.nasa.gov/srtm/</A><BR>>
I see there's not much Sweden data, so maybe, if you don't find what you
<BR>> need, you can use the "Europe" data at <BR>> <A
href="http://www.ngdc.noaa.gov/seg/fliers/se-1104.shtml">http://www.ngdc.noaa.gov/seg/fliers/se-1104.shtml</A>
and obtain 3tx files <BR>> from it!<BR>> <BR>> Write if you
have problems<BR>> Davide<BR>> <BR>> -----
Original Message -----<BR>> *From:* Michael <<A
href="mailto:geckonews@web.de">mailto:geckonews@web.de</A>><BR>>
*To:* <A
href="mailto:freegis-list@intevation.de">freegis-list@intevation.de</A> <<A
href="mailto:freegis-list@intevation.de">mailto:freegis-list@intevation.de</A>><BR>>
*Sent:* Wednesday, March 08, 2006 11:04 PM<BR>>
*Subject:* Re: [Freegis-list] 3CD or 3TX data<BR>>
<BR>> Hej Ben!<BR>>
<BR>> Thanks a lot for the link! Now I just need
the data...<BR>> <BR>> /Michael<BR>>
<BR>> P.S.<BR>> Sorry
for the quite weird sender. I usually don't send e-mail
from<BR>> this address but only receive. Now I
changed it to something useful.<BR>> <BR>>
-------- Original-Nachricht --------<BR>> Von: "Ben
Discoe" <<A href="mailto:ben@vterrain.org">ben@vterrain.org</A> <<A
href="mailto:ben@vterrain.org">mailto:ben@vterrain.org</A>>><BR>>
An: <A href="mailto:freegis-list@intevation.de">freegis-list@intevation.de</A>
<<A
href="mailto:freegis-list@intevation.de">mailto:freegis-list@intevation.de</A>><BR>>
Betreff: Re:[Freegis-list] 3CD or 3TX data<BR>>
Datum: 08.03.2006 21:37<BR>> <BR>>
<BR>> >
Michael,<BR>>
><BR>> > The free software VTBuilder
can read elevation data from any<BR>> format
and<BR>> > export it to 3TX.
Therefore, you should not have to worry about
file<BR>> > format, as you look for
data.<BR>> > <A
href="http://vterrain.org/Doc/VTBuilder/overview.html">http://vterrain.org/Doc/VTBuilder/overview.html</A><BR>>
><BR>> >
-Ben<BR>> > <A
href="http://vterrain.org/">http://vterrain.org/</A><BR>>
><BR>> >> -----Original
Message-----<BR>> >> From: Gecko's News
Adresse<BR>> >> Sent: Wednesday, March
08, 2006 5:34 AM<BR>>
>><BR>> >> As an input
for<BR>> >> the simulation program I
have to use, I need topographical<BR>>
>> data. Therefore I am searching for a source of such data
for<BR>> >> Sweden, which is provided
or can be converted into the 3CD or<BR>>
>> 3TX format.<BR>> >> Does
anybody of you know where I can find such
data?<BR>>
><BR>> >
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><BR>> <BR>> <BR>>
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