2015/08/25

Minor Update: Semi-Automatic Classification Plugin v. 4.7.11

This post is about a minor update for the Semi-Automatic Classification Plugin for QGIS, version 4.7.11.



Following the changelog:
- improvements in raster compression

2015/08/19

CLASSIFICAÇÃO SUPERVISIONADA: a Tutorial in Brazilian Portuguese about the Semi-Automatic Classification Plugin


I am always very pleased when users of the Semi-Automatic Classification Plugin wish to contribute to the plugin community and write tutorials about the use of this tool.


Mônica Pacheco de Araújo, a biologist at the CNPq junto ao Núcleo de Estudos Ambientais da Universidade Federal do Tocantins, has written a very useful tutorial in Brazilian Portuguese about the classification of Landsat images in the study area of the Basin of Ribeirão Mutum.
The tutorial describes the steps from plugin installation, to download and processing of Landsat images, to the accuracy assessment of classification.

The tutorial is available at this link http://qgisbrasil.org/blog/2015/08/18/qgis-classificacao-supervisionada-de-imagens-orbitais-com-o-semi-automatic-classification-plugin/. In particular, a PDF file of this tutorial is available here.
Many thanks to Mônica Pacheco de Araújo for the valuable contribution to the user community, and to the blog qgisbrasil.org that hosts this tutorial.

For any comment or question, join the Facebook group and a Google+ Community about the Semi-Automatic Classification Plugin.

2015/08/18

Major Update: Semi-Automatic Classification Plugin v. 4.7.0

This post is about a major update for the Semi-Automatic Classification Plugin for QGIS, version 4.7.0.



Following the changelog:
-added multiplicative and additive factors in the band set tab, which allow for on the fly conversion to TOA
-improved the threshold settings for spectral signatures, which are now saved in the signature list file
-added options for the extent calculation in Band calc
-added calculation of Kappa hat for accuracy assessment
-added button for clearing Landsat download table
-added button for sorting band set by name
-added button for creating external overviews of bands
-added button for automatic calculation of signature thresholds
-added button for cumulative cut and standard deviation stretch of input image
-added button for showing and hiding input image
-added button for zooming to ROIs and previews
-added slider for transparency of previews
-bug fixing