[Geotiff] please help me it is very urgent.

[Cody Benkelman]

Dibyendu

If the tiff file is a valid GeoTIFF, it will contain the easting & northing
value for the upper left corner.  You can run listgeo.exe (with option -tfw)
to create a "world" file which lists the resolution and easting & northing
values you seek.

Listgeo.exe is available at
http://www.remotesensing.org/geotiff/geotiff.html

As for the other files:
I assume the data you have was processed using ESRI's ArcGIS software.

The *.rrd file is a "reduced resolution dataset" providing a series of
pyramid images. 

The *.aux file is an ESRI file and probably not useful to you.

The *.xml file *might* have the easting & northing value for the upper left
corner.  If you need it, you should be able to look at the XML in a text
editor or Internet Explorer to find the appropriate tags.

If any of this doesn't make sense, feel free to contact me.

Cody A. Benkelman
ASPRS Certified Mapping Scientist - Remote Sensing (#RS-144)
cell (406) 270-1176

-----Original Message-----
From: geotiff-bounces at lists.maptools.org
[mailto:geotiff-bounces at lists.maptools.org] On Behalf Of Rob Comer
Sent: Thursday, January 24, 2008 7:54 PM
To: Dibyendu Ghosh
Cc: geotiff at lists.maptools.org
Subject: RE: [Geotiff] please help me it is very urgent.

Hi Dibyendu,

You can get the northing and easting if you place the image into a figure
using the MAPSHOW function and the referencing matrix returned by
GEOTIFFREAD.  This will set the XData and YData of the image to correspond
to map coordinates rather than default image coordinates.  For example,

>> [A,R,bbox] = geotiffread('boston.tif');
>> mapshow(A,R)
>> pixval on

(Actually, you should use IMPIXELINFO instead of PIXVAL, if you have it, but
I'm not sure offhand if it's part of R2006a or if it came later.)

Regards,
Rob Comer


-----Original Message-----
From: geotiff-bounces at lists.maptools.org on behalf of Dibyendu Ghosh
Sent: Mon 1/21/2008 7:56 AM
To: geotiff at lists.maptools.org
Subject: [Geotiff] please help me it is very urgent.
 
Hello,


I have files with extension *.aux, *.tiff, *.rrd and *.xml. Using
"geotiffread" function in  MATLAB (2006a) I am able to read the tiff image
as a grey scale image. Using "pixval" function in MATLAB, I am getting only
x,y and corresponding pixel value but I need the northing and  easting
values.



Is it possible to get the information form these files?

Please reply me it is very urgent.
Thanks in advance

--
Dibyendu Ghosh
Master Degree
IIT-Kharagpur-721302



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