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List:       grass-web
Subject:    =?utf-8?q?grass-web_Digest=2C_Vol_104=2C_Issue_2?=
From:       grass-web-request () lists ! osgeo ! org
Date:       2016-12-20 20:00:01
Message-ID: mailman.21.1482264001.11131.grass-web () lists ! osgeo ! org
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Today's Topics:

   1. Re:  Using GRASS to Analyze Construction Site Aerial	Images
      (Markus Neteler)


----------------------------------------------------------------------

Message: 1
Date: Mon, 19 Dec 2016 22:42:04 +0100
From: Markus Neteler <neteler@osgeo.org>
To: "Richard D. Klein" <Rklein@ceds.org>
Cc: GRASS-web <grass-web@lists.osgeo.org>
Subject: Re: [GRASS-web] Using GRASS to Analyze Construction Site
	Aerial	Images
Message-ID:
	<CALFmHht-HLojChCR=kLF98c7BWn5GEn2860T+ryWuzNSthMV_w@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

Hi,

you reached the Web server related mailing list and not the user list
- some delayed comments below:

On Thu, Nov 17, 2016 at 8:27 PM, Richard D. Klein <Rklein@ceds.org> wrote:
> Folks
>
> I'm searching for software to analyze a color aerial photo of a construction
> site (like the attached) and determine the percent of the site which is
> covered with vegetation or straw mulch and how much is exposed soil.
>
> I understand GRASS can do this.

That is generally correct. Ideally the imagery comes as multispectral
dataset, i.e. R, G, B (NIR) separated.
GRASS GIS offers several tools to classify, to perform image
segmentation, as well as machine learning for classification.

> If this is correct is there documentation that describes how to do this
> analysis with GRASS?

Please see for an overview:
https://grasswiki.osgeo.org/wiki/Image_processing

and for the methods:
https://grass.osgeo.org/grass72/manuals/keywords.html#classification
https://grass.osgeo.org/grass72/manuals/keywords.html#segmentation
https://grass.osgeo.org/grass72/manuals/keywords.html#object%20recognition

Regards,

-- 
Markus Neteler
http://www.mundialis.de - free data with free software
http://grass.osgeo.org
http://courses.neteler.org/blog


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