[GRASS-web] Using GRASS to Analyze Construction Site Aerial Images

[Markus Neteler]

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 at 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