iii. Explore Change Detection Folder


Accessing Change Detection Folder From ArcMap


Every time a change detection is performed between two DEM a folder is created in the project folder structure to house the results; tables, figures, and DoD rasters. To access the folder for a specific change detection right click a specific change detection and select Explore Change Detection Folder by selecting it from the pop-up menu as is shown below:


This will bring up a windows explorer where the results for the selected change detection can be explored.


Overview of Change Detection Folder Structure


All change detection results are stored in the following folder:

[ProjectName]\Analyses\CD

The results for an individual change detection are placed in a sub folder of this structure called GCD appended by the sequential number of change detections performed for that project. For example the first change detection ran in a project will be placed in a folder called GCD0001, the fifth change detection would be placed in a folder called GCD0005. The first change detection for a project will be placed in the following folder:

[ProjectName]\Analyses\CD\GCD0001

Within this folder are the following files and folders that contain the results of the GCD:

  • dodraw.tif
    • The spatial results of the change detection in raster format without applying any thresholding techniques. Simply DEMnew - DEMold.
  • dodThresh.tif
    • The spatial results of the change detection in raster format with the error with the thresholding techniques applied.
  • raw.csv
    • numerical results of the change detection in comma separated values format without applying any thresholding techniques.
    • It contains the following fields Lower Elevation Range, Upper Elevation Range, Total Area, Total Volume, Number of Cells
    • This is the areal and volumetric changes placed into preset bins. 
  • Summary.xml
    • summary of numerical results of the change detection in tabular/.xml format.
    • contains results without applying any thresholding techniques and with applying thresholding techniques.
    • Same table accessed within ArcMap from the Change Detection Results Panel. That is accessed by right clicking an existing Change Detection and clicking the View Change Detection Results
             button.
  • thresholded.csv
    • numerical results of the change detection in comma separated values format with the thresholding techniques applied. Simply DEMnew - DEMold.
    • It contains the following fields Lower Elevation Range, Upper Elevation Range, Total Area, Total Volume, Number of Cells
    • This is the areal and volumetric changes placed into preset bins. 
  • Figs
    • folder of figures
    • houses the following figures which are all in .png format:
      • ChangeBars_AreaAbsolute
        • Bar chart of the actual area of change for erosion and deposition.
        • Red is erosion and is represented by negative values.
        • Blue is deposition and is represented by positive values.
      • ChangeBars_AreaRelative
        • Bar chart of the relative area of change for erosion and deposition, absolute values are used to allow for easier comparisons.
        • Both erosion and deposition are represented by positive values.
      • ChangeBars_DepthAbsolute
        • Bar chart of the actual average depth of change for erosion and deposition.
        • Red is erosion and is represented by negative values.
        • Blue is deposition and is represented by positive values.
      • ChangeBars_DepthRelative
        • Bar chart of the absolute average depth of change for erosion and deposition, absolute values are used to allow for easier comparisons.
        • Both erosion and deposition are represented by positive values.
      • ChangeBars_VolumeAbsolute
        • Bar chart of the actual volume of change for erosion and deposition.
        • Red is erosion and is represented by negative values.
        • Blue is deposition and is represented by positive values.
      • ChangeBars_VolumeRelative
        • Bar chart of the relative volume of change for erosion and deposition, absolute values are used to allow for easier comparisons.
        • Both erosion and deposition are represented by positive values.
      • Histogram_Area
        • Histogram of the area of change.
        • Red is erosion.
        • Blue is deposition.
      • Histogram_Volume
        • Histogram of the volume of change.
        • Red is erosion.
        • Blue is deposition.