Mandi Assignment Final Answer
Questions:
1. The scale and orientation of the supplied satellite images.
Identified the location and coordinates of the Boonsong Lake in the satellite image as below:
The orientation of the satellite image is the same with that of the Boonsong Lake.
Hence, the length of a pixel is 3000/(504 - 475+1) ft, equals to 100 ft. Then the area of one pixel is 100 * 100 = 10000 square ft.
As the satellite image has 651*651 pixels, the actual scale of the region is 651*651*10000 square ft = 4,238,010,000 square ft.
The orientation of the satellite image is oriented north-south.
2. Features in the Preserve area as captured in the imagery.
Most of the images have sensor artifacts at the bottom right corner.
To identify the features in the Preserve Area, I picked the image which is generated from the data [image11_2016_09_06.csv]. It has no sensor artifacts at all.
Band combinations(B4, B3, B2) are mapped to the RGB image channels to create the false-color image as below.
Band combinations(B5, B4, B2) are mapped to the RGB image channels to create the false-color image as below:
With the NDVI and RVI Value, we can identify the different vegetation.
- Cluster 1: Common vegetation with lower chlorophyll content.
- Cluster 2: Road/Newly Land/Soil.
- Cluster 3: Healthy Plants with higher chlorophyll content which has absorbed the red light strongly.
- Cluster 4: Waterbody.
- Cluster 5: Clouds.
3. Features that change over time in these images.
