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Hi, you can do it by severall ways.
1.- If your data are between 0 and 255 you can use two procedures:
1.1.a. - Save you data file as Geo TIF/TIFF (.tif) . The output type
must be GreyScale, output size in pixels. Don�t forget note down width=
columns and Height= rows and the pixel size. pick up over Options button and
select NONE compression. You need to know the upper left x,y coordinates to
calculate the min - max x,y. You can do it to X coordinates adding the
number of columns x pixel size and Y coord. substracting the number of rows
x pixel size. (you can see the upper left coordinate --> Open / Info
/Edit/Raster info/Registration point.).
1.1.b. Go to Idrisi and File/Import-export/normalized interchange
format/TIFIDRIS.
1.2.a In Er Mapper --> Utilities/ Export raster/ Arcinfo Bil image (hdr).
This procedure create two files one with bil extension (the data) and
another one with hdr extension. In the last you can read the number of
columns and rows, the pixel size and the upper left coordinates. You must
calculate the min - max x,y. You can do it to X coordinates adding the
number of columns x pixel size and Y coord. substracting the number of rows
x pixel size.
1.2.b. In Idrisi File/Import-export/ general conversion tools/BILIDRIS and
write all parameters like columns, rows etc.
2.- If your data are bigger than 255 (like a Digital Elevation Model) you
must work a little more but is possible too.
2.1. In Er Mapper --> Utilities/Export raster/XYZ ascii grid/
write your input and output data. That is all. This creates a ascii file
like unix text file with LF.
In Idrisi --> File/Import-export/ general conversion /tools/CRLF. Input file
(your data from Ermapper) - output file and select the option - Add CR to
Unix text file with LF. This procedure create a x,y,z, ascii file. Idrisi
can import this file with File/Import-export/Software specific formats /
XYZIDRIS.
This create a pointvec file. You must rasterize it. Do you know? Initial
etc... Remember, always you must know the number of columns, rows, pixel
size and the boundaries limits.
Hope the above helps.
---------------------------------
Pedro Marauri
Uned de Bergara
[EMAIL PROTECTED]
[EMAIL PROTECTED]
http://www.arrakis.es/~pedromm
----- Original Message -----
From: Justin Costelloe <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, October 04, 1999 3:45 AM
Subject: Importing ERMapper files
> --- Start of Idrisi List message
> Hello all,
>
> I'm having trouble importing ermapper image files to Idrisi. I'm using the
> BILIDRIS function and specifying pixels, lines, bands, x and y coordinates
> but I'm only getting speckle up as an image. I suspect it may be a problem
> with defining the header. I have tried no header and headers of 128 and
256
> bytes but with no luck. Has anyone imported ermapper image files to idrisi
> and do you have any tips.
>
> Thanks
>
> Justin
>
> 109 George St
> Fitzroy Vic 3065
> Home 61-3-9419 8703
> Mob 0417 538338
> Email : [EMAIL PROTECTED]
>
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