SO432, Geographical Information Systems

#### Exam 2, Spring 2017

 Definitions (pick 6/8) 6@5 30 Short answer (pick 2/3) 2@10 20 Maps (no choice) 5@10 50 Total 100

Read directions carefully.  You have a selection of terms for the first part of the exam.  Carefully select which questions you will answer, and only answer the correct number.

Quality of your answers is important.   For full credit you should use correct terminology, and show that you understand the concepts involved.

Except for the 3x5 card as authorized on the course policy statement, all work on this exam is individual using only what knowledge you have acquired.  You may not any reference materials or storage devices (books, notes, computers, stray ink on your person or uniform), and you may not use IM, texting, talking, or any other means to communicate with other individuals.

Definitionsdefine 6 of these8 terms with a concise sentence that clearly shows your understanding of the term.

1. Contrast enhancement:
2. Focal operation:
3. EXIF:
4. FIPS code:
5. Census tract:
6. Laplacian of Gaussian (LoG)
7. Aspect:
8. Reflectance map (or hillshade):

Answer 2 of these three questions:

You need to create a database for GIS work. Discuss how and why you must consider the following:

1.     Geometry of the records:

2.     Data type for the records fields:

3.     Length of the record fields:

You are digitizing lines.  What choices do you have in how you handle this operation, and what are the tradeoffs you consider in deciding which to use?

What is the difference between supervised and unsupervised classification, and what can we use classification for?

Answer all of the remaining questions based on figures.

These two maps were created by with the same basic data.  What is the difference between them, and how do they help you to visualize the landscape?  Use correct terminology, and specific examples of what you see.

This map shows a coastal area on the US East Coast.  Discuss how the data is collected, processed, and used to track coast erosion.  For full credit you should include the following terms, and show you understand what they mean:

• LAS
• Gridding
• DTM/DSM
• Map algebra
• Lidar

What is this figure showing?  Discuss the following for Landsat 8 and its OLI and TIRS:

• Difference between displaying bands 2/3/4 and 3/4/5.
• Why band 9 is in a white region of the figure.
• How resolution varies between bands 1-9, and bands 10/11 (discuss the break in the horizontal axis scale.

What kind of data set is this?  What can it be used for?

What features are we seeing in this view, and how can you identify them?

Can you guess the coordinate system used?  Why or why not?

This map of Annapolis  and the Naval Academy are joining to do an environmental study, and saw this map.  They want to know what data they need to start with, how they will operate on it, and what the map will tell them.