I agree with Charles. The only difference between an image and a grid in my
view is that an image is usually constructed of a finer mesh of points
(pixels), and then maybe not in the case of some LANDSAT imagery where the
ground resolution is about 30m, and there are multiple instead of single z
values for each point in the image (as opposed to a single z value in a
grid). Effectively, grids are the representations of a single "channel" or
"band" of data forming an image.
Andrew Waltho
Brisbane, Australia
e-mail: [EMAIL PROTECTED]
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of Charles Huyck
Sent: Tuesday, 7 December 1999 3:00
To: [EMAIL PROTECTED]
Subject: MI: Image VS GRID?
What is the difference between an image and a Grid? One is derived and one
is imported? Aren't they both just 2D (or more) arrays of numbers? Color
values reference the object. You can analyze these numbers to extract and
classify the object, like on the X-files last night when the FBI agent used
"SKAG" to classify a surveillance video still and it turned out to be the
exact colors of the some guy's letter jacket.
I guess ESRI is doing away with this weird GRID vs image thing. I never
understood the difference anyway.
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