Object Based Classification Cont.

 This lab is a continuation of the last lab. We are working with classifying raster images and then performing simple analysis based of those classifications. The first step of this lab was to take raster of County Park and classify it. Then we had to use the value count provided by the classification and use the pixel size to generate area for each class.

Then we took that already classified raster and broke the classes into two parent classes of permeable and impermeable to find their areas.  

Then we were provided a road and asked to provide an analysis of its condition. To accomplish this we classified the road into pavement, cracks, and vegetation. Once this was done we again used the count value to find the area of each class. Then we generate a map showing classes and their areas to shows the amount of cracks compared to the total pavement. 

 

Object Based Classification

     This week labs deals with classify rasters by using object classification inside of ArcGIS Pro. The instructor provided a demonstration on operating classification wizard and then asked us to create steps to perform object classification in the future.  My generate steps are listed below:

1. Use the Extract Bands function to better identify your object by selecting which bands to extract
1. EX vegetation
2. Open the Classification Wizard
1. Confirm Object based classification is selected
2. Select Default classifciation schema
3. Segment the Images
4. Confirm the desired
1. Spectral Detail
2. Spatial Detail
5. Create the Preview Segment
3. Training Samples
1. Remove the default classes
2. Create new parent classes
1. set values
2. set colors
3. Create specific classes
1. Select the class and use the polygon tools to train the ai
2. Collapse the polygons to create a single class
4. Select the Classifier (Support Vector Machine)
5. Run the Preview Classification
6. Run the Classification and set the output
7. Reclassify any errors
8. Finish the Classification Wizard

After completing our instructions we were ordered to classify a neighborhood into permeable and impermeable surfaces.