Supervised Classification

I have to start off by saying I rather perform an unsupervised classification rather than a supervised classification. Although the supervised classification is more accurate. It is a very time consuming process, but it is also so easily to make mistakes. Once I viewed by end result I noticed that my residential area was much larger than my forest areas. I believe that I had to add more AOI for my forest areas to make sure that I had all shades of green. I also compared my histograms from the unsupervised and supervised classification to notice my error. The legend on the right is for the supervised classification. To get the image to look more accurate I would have to go back and select more AOI for the forest and high density urban areas.

Lab5 Unsupervised Classification

Not being familiar with the area I used the satellite images from www.maps.google.com to be able to assign the land types.

Rectification

The usefulness of rectification as well as the pitfalls of image rectification.

The usefulness of rectification is that you can take an image and align it with a map to get actual x and y coordinates from land.

The pitfalls of image rectification is that it's a time consuming process.

Residential Area Fort Worth, TX - Thermal Imagery

Brief description of why the following features appear as they do in this thermal infrared image:

Roads- bright (hot) because of the heat that has been absorb from the sun.

Natural and man-made vegetation-some areas are bright (hot) because of the soil being dried and some areas are dark (cool) because the soil have moisture.

Sidewalks and patios-bright (hot) because the sidewalks and patios are concrete, which absorb the heat from the sun.

Storage sheds in back yards-dark (cool) because of the material on the roof.

Automobiles-some are dark (cool) because they have been parked and unused and some are bright (hot) because they are releasing heat from the engine from being on or recently being used.
Bright spots on many of the roof tops-bright spots (hot) because the vents or chimneys are releasing heat from the houses.

Lab 2-Question 7

Panchromatic view of Marco Island. This image shows the water as light gray, the islands in black, land is shown in light gray with some white areas, and sand as bright white along the coast. This image compared to the multispectral has a better resolution and shows the features better.

Multispectral RBG 2, 3, 4 view of Marco Island. This image shows all the features differently from the above image, except for the sand areas, which is represented similar to the above image. Bright areas along the coast. The water is shown as brown/green, the islands are in a dark blue and land is shown in a lighter shade blue with some with areas.