Masking out land in Landsat image using either ILWIS or Grass - comp.infosystems.gis

Message from discussion Masking out land in Landsat image using either ILWIS or Grass

Yalin

View profile

More options May 11, 10:35 pm

Newsgroups: comp.infosystems.gis

From: Yalin <mjm_v...@yahoo.com>

Date: Sun, 11 May 2008 21:35:02 -0500

Local: Sun, May 11 2008 10:35 pm

Subject: Masking out land in Landsat image using either ILWIS or Grass

  Reply to author
  |
  Forward
  | Print
  | View thread
  | Show original
  | Report this message
  | Find messages by this author
  

Hello:

I have been trying for some time to mask out the land area around one lake
in a Landsat image of a bunch of lakes. I want to know how I can just
isolate the lake and make the land disappear and not be included in the
analysis. If anyone can help me I would really appreciate it. I have only
been able to make submaps and that is not good enough since it still
includes some land and other lake components in the submap. I have yet to
be able to create a polygon around the lake and clip just the lake area out
of the Landsat image.

I am very new to grass, but I am somewhat familiar with ILWIS.

Reply to author Forward