Writting a BIL in ASCII format
Travis Kirstine
tkirstine at JDBARNES.COM
Thu Oct 12 13:44:59 PDT 2006
Just try:
gdal_translate -of AAIGrid dq0512ne.bil test.asc
-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU]On
Behalf Of Trimble, Beheen
Sent: Thursday, October 12, 2006 4:27 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: Re: [UMN_MAPSERVER-USERS] Writting a BIL in ASCII format
Frank,
I get this error:
C:\beheen\landuse>gdal_translate -of AAIGrid -b 3 -projwin 510724.036
106267.487 531636.641 83405.401 dq0512ne.bil test.asc
Too many command options.
Beheen
-----Original Message-----
From: Frank Warmerdam [mailto:warmerdam at pobox.com]
Sent: Thursday, October 12, 2006 3:53 PM
To: Trimble, Beheen
Cc: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: Re: Writting a BIL in ASCII format
Trimble, Beheen wrote:
> Frank,
>
> I can see you are all over the net helping and answering people's
> questions. I really thank you for what you are doing. I wish I could
be
> you! Right now I am doing my master and working full time and don't
have
> much time to devote. I promise after I graduate (next april) I will
help
> you guys.
Beheen,
Whew, doing a masters and holding down a full time job. I couldn't
hack that! I look forward to your graduating and having a bit of
breathing room to relax, and even help out some.
> This is my problem/question:
>
>
>
> I was surfing the web to use gdal libs to read an ESRI BIL file and
> write it out in ascii format. I think the gdal_translate will do but I
> am not sure which option is which! Below is the header info. If you
> please fill the blank for me, if that is the way!
>
>
>
> 1) I am using header information to translate to ascii grid, is this
> gives me an ascii file?
If you translate to AAIGRID format, you will get an ascii raster file.
> 2) Not sure what to put in place of '?' below
>
>
>
> gdal_translate -ot Byte -of AAIGrid -b 3 -outsize ? ? -srcwin ? ? ? ?
> -projwin 510724.036 106267.487 531636.641 83405.401 -a_srs ? -a_ullr
> 510724.036 106267.487 531636.641 83405.401 -a_nodata -9999 -mo ? -co ?
> dq0512ne.bil dq0512ne.asc
If you want the data at full resolution for the -projwin area, then
just omit -srcwin and -outsize and you will get the data at full
resolution.
Likewise you shouldn't need -a_ullr, -mo or -co. If you use:
gdal_translate -of AAIGrid -b 3 \
-projwin 510724.036 106267.487 531636.641 83405.401 \
dq0512ne.bil dq0512ne.asc
you will get an ascii grid file cut from the indicated region of the
source file, only taking band 3 but otherwise with the original values,
data type, and resolution.
> 3) Give me a hint on how to associate a color file with the resulting
> ascii file.
What application do you want the color table to work with? Generally
speaking the GDAL commandline utilities do not allow adding a color
table
to a raster file.
Best regards,
--
---------------------------------------+--------------------------------
------
I set the clouds in motion - turn up | Frank Warmerdam,
warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | President OSGeo,
http://osgeo.org
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