SO432, Geographical Information Systems
Short answer 3 @ 10 30 ___________
Longer answer 3 @ various 40 ___________
Total 100 ___________
Read directions carefully. You have a selection of questions for the first two parts 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.
All work on this exam is individual. You may not any materials (books, notes, computers), not listed above in the authorized references, and you may not use IM, texting, talking, or any other means to communicate with other individuals.
Comments, but not complete answers.
Definitions: define 10 of these terms with a concise sentence that clearly shows your understanding of the term: Each is worth three points.
so far nowhere near complete coverage of even the US, let alone the rest of the world.
and TLID: 16/17 skipped
Answer 3 of the 4 short answer questions. Each is worth 10 points.
1. Why do you think USGS decided to change the spacing of their data from UTM coordinates to geographic (lat/long) coordinates? Do you agree with their rationale?
2. There is a move underfoot to have NGA report all elevations as geodetic (HAE, height above the ellipsoid). Do you consider this a good idea, and what are the alternatives for what we can use a base level for determining elevations?
3. What is the NLCD, and how was it created? What does it mean when we say it has a 30 m resolution?
4. How has GIS changed the traditional craft of cartography?
(3) You found the map on the first page of the exam on the internet, and it will be perfect for a discussion you will have with your plebes tonight. You would like to use this map as a GIS base map. What will you have to do to use the image (it is a JPEG, and you have no metadata).
(3) Would you be able to click on a state and get the number of electoral votes, or find all the states with more than 10 electoral votes?
(3) If you found that the same web site also had the same data as an ESRI shape file, would getting just the SHP file be a better or worse choice? Why or why not?
(3) Which type would each of the three options above be?
JPEG ____Vector Raster_ Neither _
Shape file ____Vector Raster_ Neither __
Spreadsheet ____Vector Raster_ Neither __
DTED Level 2
DTED Level 0
DTED Level 0
DTED Level 1 or 2
DTED Level 1
DTED Level 1 or 2
Points) You have been tasked to obtain digital map data for an upcoming
operation, and got three different DTED files as seen on the previous page. Your analyst has prepared shaded relief and
contour maps of the same area in all three data sets, but you suspect they are
not correctly paired in the table on the previous page.
DTED is raster. You can create vector contour lines from it.
(10 Points) Your analyst has just found something called SRTM DTED, and has brought you a map of the same area covered by the other data sets. What is the SRTM, and how does this data set compare with the others? When, if ever, would you want to use it?
This is SRTM DTED 2, Note:
Lack of detail compared to the DTED level 2
Radar "speckle" in the flat parts of the map area
Power line (?) in the lower right portion of the map