Supervised classification (Tutorial)
From AWF-Wiki
(Difference between revisions)
| Line 17: | Line 17: | ||
## Also add the vector layer ''Training_manual_poly.shp''. | ## Also add the vector layer ''Training_manual_poly.shp''. | ||
## In the {{button|text=Semi Automatic Class Plugin}}, go to the {{button|text=Semi Automatic ROI Creation}} tab. | ## In the {{button|text=Semi Automatic Class Plugin}}, go to the {{button|text=Semi Automatic ROI Creation}} tab. | ||
| − | ## | + | ## In the {{button|text=ROI Definition}} section select {{button|text=ID: 1}} and for {{button|text=Information}} enter {{typed|text=Urban area}} and click {{button|text=+}} to adda n ROI (figure '''B'''). {{red|text=Not sure about this...}} [[User:Lburgr|- Levent]] ([[User talk:Lburgr|talk]]) |
| + | ## In the {{button|text=Classification algorithm}} section, choose {{button|text=Minimum distance}}. Click {{button|text=+}} in the {{button|text=Classification preview}} section. | ||
| + | ## For {{button|text=Classification style}} click {{button|text=Select qml}} and browse for the file ''classification.qml'' from the [[course data]]. Click {{button|text=+}} to confirm and select any part of the image. A message will appear that the algorithm is executing. Wait until it has finished. | ||
Revision as of 17:11, 17 February 2014
 |
sorry: |
This section is still under construction! This article was last modified on 02/17/2014. If you have comments please use the Discussion page or contribute to the article! |
- This article is part of the QGIS tutorial 2013/14.
In this article, you will learn how to conduct a supervised image classification in QGIS 2.0
- First, you need to install the Semi Automatic Class Plugin
- Click Manage and install plugins.
- In the appearing menu, select Add more.
- Browse for the plugin (it's most comfortable to use the search-field).
- Click Install
- Testing the plugin
- For the plugin to work, you need to make sure that your GRASS GIS installation is working properly:
- With the plugin installed, select Raster --> Semi Automatic Class Plugin.
- In the appearing menu, select the Settings tab (figure A). Click Test Grass GIS and wait until the message Test OK appears.
- Click the Test QGIS Algorithm button and wait again until the Test OK message appears.
- Do the same for the Orfeo Toolbox and Saga algorithms.
- Classification
- Add the raster map 188_pca_indices.tif from the course data (see previous exercises).
- Also add the vector layer Training_manual_poly.shp.
- In the Semi Automatic Class Plugin, go to the Semi Automatic ROI Creation tab.
- In the ROI Definition section select ID: 1 and for Information enter Urban area and click + to adda n ROI (figure B). Not sure about this... - Levent (talk)
- In the Classification algorithm section, choose Minimum distance. Click + in the Classification preview section.
- For Classification style click Select qml and browse for the file classification.qml from the course data. Click + to confirm and select any part of the image. A message will appear that the algorithm is executing. Wait until it has finished.
