"Damian" wrote:
I'm looking for a way to calculate the area of certain colours within a
raster file - say, for example, areas of colour-coded districts from a
scanned city map. Then, from this, if possible, I'd like to split the areas
up further using Mapinfo polygons.
There's two ways I
Could you please forward any info you recieve?
-Natalie Swayze
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From: Roy Chiappini
To: Damian Skeeles
Cc: [EMAIL PROTECTED]
Subject: Re: MI Calculate Raster Area / Convert to Vector
Date: Sunday, December 05, 1999 12:56AM
Damian has a reasonable request and one that seems to identify
Great idea. Needs a couple of steps though. First is the creation of the
needed reference gird and color numberization. Next you need a "clumping"
tool to define areas of adjacent color. Lastly you need a raster to vector
conversion if raster while faster is not as corrector
MidNight
I've downloaded several political boundary files from
www.gisdatadepot.com but have not been
able to import them into MapInfo.
The files are downloaded as ponet.e00 files but the
Arcmap translator reports errors and aborts, and a co-worker with the translator
included with MI5.5 can't
I've never had a problem with any of the GIS DataDepot's .e00 files, ArcLink
always translates them just fine. The only stipulation I've found is that if
you download a boundary file called "ponet.e00," you *can't* rename the
file, otherwise ArcLink won't translate it. I have no idea why this is,
Mansour
There is a free SEGY Viewer available from Encom Technology
(www.encom.com.au). I'm not sure if this will let you save off as raster but
you can certainly print from it.
Regards
Chris Clarke
Meridian GIS
PO Box 295
Level 2, 1050 Hay Street
West Perth 6872
Western Australia
Phone :
Damian has a reasonable request and one that seems to identify somewhat of
a weakness in MI, i.e., ability to do something with raster images.
I use MI and Vertical Mapper. Vertical Mapper uses is quite flexible with
grid (grd grc) files.
I suggested to VM that they provide an image import
Hi Roy,
This is where specialist image processing software such as ER Mapper comes
in. ER Mapper treats every "image" as a grid, thus allowing all types of
operations such as complex filtering, classifications, raster-vector
polygons, statistics, 3d views etc.
Check out www.ermapper.com for
Richard Greenwood wrote:
Damian has a reasonable request and one that seems to identify somewhat of
a weakness in MI, i.e., ability to do something with raster images.
I use MI and Vertical Mapper. Vertical Mapper uses is quite flexible with
grid (grd grc) files.
I suggested to VM that
