Welcome to my first blog post of my second GIS class - Photo Interpretation & Remote Sensing! For this first lab we are exploring basic interpretation features for aerial photographs. This first map is exploring texture and tone. I created a feature class for both texture and tone and added a field to each attribute table to label my new polygon features. For tone, the identified very light, light, medium, dark, very dark areas on the photograph. For texture, I identified very fine, fine, mottled, coarse, very coarse areas on the photograph.
For this map, I identified features based on shape & size, shadow, pattern, and association. Some of these seem like very common knowledge but I know these are baseline skills that will be useful for more complicated projects! For shape and size I chose a house since it's comparative size to other objects and it's shape looks like a house, a car since it is small and can fit on the road, and a road because of its long and narrow shape. For shadows, I chose the water tower because it has a long shadow clearly showing its shape and height, a pole with a shadow of a light on the parking lot area, and a building with distinct shadows showing the corners of its rectangular shape. For patterns, I chose the waves off the shore as it looks breezy which created waves in the water, the shoreline where you can see how the waves crash into the sand creating a pattern, and the neighborhood which is a grid of similarly shaped buildings (homes). For association, I chose the pier and a large parking lot because usually when there is a public pier and beach area, there is a lot of parking for visitors.
My third and final map for this lab is comparing a true color image which is the same colors of light that we see with our eyes and a false color IR image. The objects identified by the purple points are the objects I chose to compare between the two pictures. The tennis courts and the parking lot turned out to be the same color in the false color image - a bright green, almost white color. The forest and the sports field were originally green in the true color image but are red in the false color IR image. And, the river is a greenish brown color in the true color image but it's very dark and almost a black color in the false color IR image.
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