http://wiki-upstream/ 2026-05-09T18:19:43+00:00 http://wiki-upstream/ http://wiki-upstream/lib/exe/fetch.php?media=wiki:dokuwiki-128.png text/html 2017-11-09T17:43:24+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:attributes_creation&rev=1510249404&do=diff Features Extraction and Normalization When you already have Polygons or Cells, you can start GeoDMA, by clicking OK in GeoDMA first window. A list of available features will appear in the Extraction tab. Select some features and insert or remove for extraction. Click text/html 2017-11-09T17:56:21+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:c45_creation&rev=1510250181&do=diff Creating your Decision Tree 'by hand' GeoDMA creates decision trees automatically. However, you can define a classification by your own. To build your decision tree, you must create an ascii file with .c45 extension, using, for example, notepad. This is the file basic structure: text/html 2017-11-09T17:56:58+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:c45_io&rev=1510250218&do=diff Saving/Loading your Decision Tree This page explains how to Load and Save your decision trees in GeoDMA. Saving your tree When performing your classification using decision trees, select the desired attributes, the training labels, and the type of objects to be classified (Polygons or Cells). Then, prior to the classification, check the option text/html 2017-11-09T17:55:10+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:classification&rev=1510250110&do=diff Classification If you performed the Training step, now you can use the DECISION_TREE algorithm. Select some attributes, set the View name to be created in the TerraView window, and press Classify. The generated Decision Tree will appear, and after the results will be shown in the TerraView window. You can (un)check the classes to visualize every result separatelly. text/html 2017-11-09T17:55:48+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:creating_cells&rev=1510250148&do=diff Creating Cells This page has an example of how to create a cellular space to use inside GeoDMA. The first thing is to click in the menu “Info Layer”, than “Create Cells...” option. In the window “Creation of a Layer of Cells”, you must define some parameters for the cellular space: text/html 2017-07-18T14:56:33+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:features&rev=1500389793&do=diff GeoDMA 0.2 Features GeoDMA has metrics integrating Polygons, Cells, and Images. Through image segmentation, GeoDMA creates Polygons. We provide a list of 3 feature types, including: * Segmentation-based spectral features * Segmentation-based $X = p$$X = C$$B$$p_{ij}$$i$$j$$D$$px_{max} - px_{min}$$\geq 0$$px$$i - j$$\geq 0$$-\sum_{i=1}^{D - 1} \sum_{j=1}^{D - 1} p_{ij} . \log{p_{ij}}$$\geq 0$$\sum_{i=1}^{D - 1} \sum_{j=1}^{D - 1} \frac{p_{ij}}{1 + (i - j)^2}$$\geq 0$$N$$ \frac{\sum_{i=1… text/html 2017-11-09T17:40:26+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:manual_02&rev=1510249226&do=diff GeoDMA 0.2 user's manual Welcome to the user's manual of GeoDMA! The following topics are available: Basics * Opening TerraView and Creating your Database * Image Segmentation * Features Extraction and Normalization * Training and Visualizing your Data * Classification Tricks * Creating Cells * Creating your Decision Tree 'by hand' * Saving/Loading your Decision Tree text/html 2017-11-09T17:42:56+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:segmentation&rev=1510249376&do=diff Segmenting your Imagery Now you have your image in the database. To use GeoDMA for classification, you need to have Cells or Polygons. To generate Polygons, you can use GeoDMA for image segmentation. Click Plugins, Data Mining and GeoDMA. When GeoDMA's first window appears, click on text/html 2017-11-09T17:41:38+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:terraview&rev=1510249298&do=diff Opening TerraView and creating your database When you open TerraView (executable file terraView in the GeoDMA folder), the following window will appear. To create, or open, your database, click on the highlighted button. To create your database, select the text/html 2017-11-09T17:54:34+00:00 Anonymous (anonymous@undisclosed.example.com) http://wiki-upstream/doku.php?id=geodma:training&rev=1510250074&do=diff Training and Visualizing your Data In the Train tab, you can create your classes and assign some samples in the image to the classes. GeoDMA uses this information to train the supervised classification algorithm. After creating your classes, you should select samples in your data. You can select one polygon per click, or more than one, defining a region, using buttons