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Re: MSB, LSB? [message #14443 is a reply to message #14441]

Thu, 04 March 1999 00:00

davidf
Messages: 2866
Registered: September 1996

Senior Member

�� (raptor28@net-in.co.kr) writes:

> i want to read some datas.
> its description is below.
>
> <Description of Data>
> Spatial Resolution : 3" x 3"(about 90m)
> Number of Row and Column : 1201 x 1201
> Pixel depth : 2byte
> Height Accuracy : 1m
> File Name E127n38.img : E127 - E128, N38 - N39
> File Format : unformatted binary
> Height = MSB(most significant bits) * 256 + LSB(least significant bits)
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> i can't read this data to use IDL
> how read?

OpenR, lun, thisFile, /Get_Lun
data = IntArr(1201, 1201)
ReadU, lun, data
Free_Lun, data
height = Byte(data, 0) * 256 + Byte(data, 1)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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		Re: MSB, LSB? By: davidf on Thu, 04 March 1999 00:00
		Re: MSB, LSB? By: davidf on Thu, 04 March 1999 00:00

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