Multi-Band Analysis

Task Of Lab:

The objective of the lab was to perform multi-band analysis on an Area of Interest located in Greenbelt Park, Maryland. In the scenario, there were rebel fortifications within the tree cover, requiring me to use multi-band analysis to locate the fortifications, create a side-by-side comparison of the natural color imagery and the color infrared imagery, and write my results.

Methodology:

1. Located my Area of Interest (AOI) using the coordinates given to me.

2. Downloaded the 1-meter NAIP imagery that covers the AOI from United States Geological Survey's The National Map.

3. Displayed the downloaded imagery on QGIS. I made two copies of the imagery, one to remain on natural color, and the other to display the imagery in color infrared (CI).

4. Overlaid the AOI as a red box over the imagery using the provided coordinates.

5. Changed the Layer Properties of one of my chosen CI layer by going to Layer Properties -> Symbology -> Band Rendering and changing the Red Band to "Band 4," the Green Band to "Band 3," and the Blue Band to "Band 2." This changed the imagery to display CI, enabling my analysis.

6. Saved both the natural color imagery and CI imagery with the AOI overlay as .png files.

7. Opened Microsoft PowerPoint and added the .png files of my imagery. Using the Draw function of PowerPoint, I drew where rebel fortifications were located on the CI imagery with black circles.

8. Calculated where the best method of attack would be and notated that with cyan arrows. 

9. Copied and pasted the circles and arrows all together onto the natural color imagery to match up exactly  with the CI imagery.

10. Wrote my methodology, results, and source on the slide to look presentable for a briefing with decision-makers.

QGIS Tools Used in Analysis:

• Vertex Tool

• Add Polygon Feature