[Qgis-user] Help for crossing data with fragstats and QGIS

[Philip Barlow]

Hi Mariana,

Oh I see, it isn’t exporting the data that you want to map just a 1 or 0?

If you can get the data out and have some geometry you can relate/join it to…  I’m not familiar with that piece of software unfortunately.

Is there anything in its documentation that can help you?  http://www.umass.edu/landeco/research/fragstats/fragstats.html

Phil

From: Mariana Buzzi [mailto:marianabuzzi86 at gmail.com]
Sent: 20 March 2017 15:42
To: Philip Barlow
Cc: qgis-user
Subject: Re: [Qgis-user] Help for crossing data with fragstats and QGIS

Hi Phil! Thanks for you answer!

The binary raster consists of patches and a matrix, this is the one used as an input to be able to enter the Frastasts and calculate the metric of landscape. As you will see in the attached image, the fragstasts generates me as a result a table (at class level, patch level and landscape level). What I need is to generate a map (for example showing the patch density) depending on the result generated by the Fragstats. My problem is that I do not know how to transform the table of fragstats to a map

2017-03-20 12:26 GMT-03:00 Philip Barlow <philipb at pembrokeshirecoast.org.uk<mailto:philipb at pembrokeshirecoast.org.uk>>:
Hi Marianna,

From what you are saying it sounds like you have a raster with pixels/grid values 0 or a 1?

I think what I would do is some ā€ binningā€¯.  You can create grids to the desired size with the mmqgis plugin so you could make a 100 hectare grid and then run the zonal statistics plugin to sample your raster, that will append statistics from the raster to the grid for each grid square.  You could then style (graduated) your grid according to the ā€ countā€¯ column to give you a kind of heat map.

Regards

Phil



From: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org<mailto:qgis-user-bounces at lists.osgeo.org>] On Behalf Of Mariana Buzzi
Sent: 20 March 2017 14:12
To: qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>
Subject: [Qgis-user] Help for crossing data with fragstats and QGIS

Good morning. I am trying to make maps in QGIS with information provided through landscape metrics obtained through the program fragstats. The input used to enter Fragstats is a sorted raster generated in QGIS; The raster is made up of two values: 1 (wells and paths) and 0 (matrix). My problem is that I do not know how to curl the table with the results of the metrics that Fragstats gives me to be able to make a map. For example a map with patch density (number of patches per 100 hectares).
I hope you can help me. Thank you!
Mariana
Universidad Nacional de la Patagonia San Juan Bosco

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