Screenshots Q4

Question 4 screenshots

 

1. Go to “Tools” to open “Algorithm Librarian”
2. Click the “Find” button and type “THR” (Thresholding Image to Bitmap) and open the algorithm;

In the Input Param1 tap,

put Threshold Min: 58, Threshold Max: 160

To get the min. and max pixel values

- open the numeric value chart

- click on the your interested pixel(Road) and read the numeric value.

The middle  value,which is highlighted with red box, is pixel value for what I clicked(Road).

Road Extraction image with Threshold Min: 58, Threshold Max: 160

erasing image noise for Road extraction

Post - digitizing image

From the Algorithm Librarian, Find BIT2Line This module converts a bitmap layer to a line layer.

The Image after Run the BIT2LINE Algorithm- This image is a Line Layer

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BONUS

Exporting as ARCVIEW SHAPEFILE(.shp)

Opening with Arc GIS

Editing map in AcrGIS/Inserting Legend, Scale Bar, and North arrow, and title. Also, over layed Road map with true Colour map is inserted as a picture(.JPEG) format as well.