HOA 2 Answersheet Imagery
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Youngstown State University *
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Apr 3, 2024
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Uploaded by ChefRookMaster688
Advanced GIS
Name: Arnob Rahee
HOA 2: How to Use Remotely Sensed Imagery in ArcGIS Pro
Question 13.1: (1 point for undergrads, ½ point for graduate students) What features of this building as seen from the sky in this orthophoto would help you to identify it as the Rock and Roll Hall of Fame (or at least a unique building dedicated to music)?
The pyramid shaped glass attached on the side of the building.
Question 13.2: (1 point) What four different outdoor sports does Humphrey Park accommodate? Which elements of image interpretation are used to determine this and how are they used?
BasketBall, American football, Tennis and baseball.
There are 2 basketball shaped stadiums There are 2 tennis shaped stadiums One stadium designed to play American football
4 baseball stadiums
Question 13.3: (1 point) What type of development (residential, industrial, commercial, etc) is to the immediate north and
northeast of Humphrey Park? Which elements of image interpretation are used to determine this and how are they used?
The area to the immediate north and northeast of Humphrey Park is commercial development, as indicated by the regular grid-like structures
Question 13.4: (1 point: Challenge Question: Required for graduates students, but worth an extra credit point for undergrads who get it correct) This facility shown in the orthophoto comprises many different things but they all contribute to one overall place. What kind of facility is being shown in this image? Which elements of image
interpretation are used to determine this and how are they used?
It is a park. Open spaces and the trees proves that this is a park. Apart from this the place has desalination plant. The fact that this place is close to sea and also for the fact that this place is very open as a google search reveals that “Desalination plants are often built near the open ocean
because the concentrated seawater mixes quickly with the surrounding seawater”
Question 13.5: (1 point for undergrads, ½ point for graduate students) What kinds of details of the harbor and the boats can you see in the 0.3-meter orthophoto that you cannot in the 1-meter NAIP image? Why is this?
The color of the boats and that of the water is much detailed in 0.3 meter harbor than in 1-meter NAIP image
The detailed color variations in a 0.3-meter harbor image compared to a 1-meter NAIP image result from differences in spatial resolution. A 0.3-meter image has smaller pixels, capturing finer details, while a 1-meter image with larger pixels loses some nuances, leading to reduced color and feature differentiation in the latter.
Question 13.6: (½ point) Why do the trees look green in the NAIP Natural Color image but look red in the NAIP Color Infrared image? Hint: keep in mind which bands are being shown in which of the three channels,
and the properties of those wavelengths.
In the NAIP Natural Color image, the green appearance of trees is due to the combination of visible light bands, emphasizing the green color of chlorophyll. In the NAIP Color Infrared image, near-infrared (NIR) replaces the red channel, highlighting healthy vegetation as red since plants strongly reflect NIR light, providing insights into vegetation health.
Question 13.7: (½ point) Is the field of the Cleveland Browns Stadium real grass or artificial turf? How can you tell from just viewing the two NAIP images?
The grass is natural. The redness of the trees and that of the grass is almost same in NAIP Color Infrared image indicating healthy vegetation.
Question 13.8: (½ point) Why can you not see individual planes at the airport in the cle.img Landsat imagery?
The resolution of the cle.img Landsat imagery is not high enough to distinguish between high
Question 13.9: (½ point)
At the 30 meter resolution of the Landsat imagery, what features of Burke Lakefront Airport can you still identify?
The runway of the airport is distinhguishable
Question 13.10: (1 point)
What kind of land cover corresponds with these bright red areas in the Landsat image (i.e. what do these bright red areas represent)? With this band combination and stretch type, what does this
say about the interaction of the three types of energy being shown in the Landsat image’s bands and this type of land cover?
The bright red areas in the Landsat image, observed through Band 7 – the longer of the Shortwave Infrared (SWIR) bands – represent regions that interact with longer SWIR energy. In this specific band combination and stretch type, the red appearance indicates materials and surfaces that exhibit distinctive characteristics when exposed to longer SWIR wavelengths. These areas are likely to include urban environments, given that urban materials tend to interact uniquely with longer SWIR energy.
The interaction of different types of energy (spectral bands) with the land cover in the Landsat image is characterized by the way different surfaces reflect or absorb these wavelengths. The band combination and stretch type highlight these differences: urban areas, likely reflecting more
in certain wavelengths, appear in shades of pink and purple, indicating a unique spectral signature distinct from natural landscapes. Vegetation, in contrast, appears green, suggesting the use of bands that capture its high reflectance in the near-infrared spectrum. Water bodies, appearing in darker blue and black, are characterized by their absorption of most visible and near-infrared light. This varied representation is a direct consequence of how different materials and surfaces interact with the specific wavelengths captured by the Landsat sensors, accentuated by the image processing techniques used.
Question 13.11: (1 point) What are these areas on the landscape and how can you tell? Hint: Look at the size and pattern of
the areas and think about what kinds of energy reflectance you’re examining with this Landsat image.
Lakes/ small water bodies
Question 13.12: (1 point) What are these areas on the landscape and how can you tell? Hint: Look at the size and pattern of
the areas and think about what kinds of energy reflectance you’re examining with this Landsat image.
The pink areas represent cities while arrows pointing to green represents greenery most likely parks or sanctuary places
Submit results (1 point):
Submit the URL for a Basic Instant App of your results. Your app should include the following:
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The Landsat image set up in a color infrared (5-4-3) band combination
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