## Midterm exam

This is a take home, open book exam handled by Moodle, no on-campus presence needed.
The exam is the same for the regular and distance sections.
You can use on-line and printed resources, but the responses should be your own work.
Questions will be available in Moodle on Day 1, before noon,
answers are due on Day 2 at 11.45 pm EST, by submitting a pdf file named `LastnameFirstname_Exam.pdf`

to Moodle.
See the schedule for the dates for Day 1 and Day 2.

- Sample questions
- What is a cartographic projection and which common projections are used in US? What does NAD83 stand for?
- What is the difference between cost surface and cumulative cost surface? What are they used for?
- Compute cumulative cost surface and least cost path between two given locations
- Describe basic digital terrain representations used in GIS and their properties
- What is spatial interpolation, provide general interpolation equation and describe spatial interpolation methods and their properties
- Define point topographic parameters and provide general equations for the parameters based on differentail geometry.
- Provide equations for estimating partial derivatives from raster-based DEMs
- Provide example of a problem or task that can be solved using viewshed analysis
- Compute a map of solar incidence angle for a given date and time.
- Compute canopy height raster map using bare earth and first return point clouds.

- Most questions require computation of a graphical output or development of a GIS-based workflow. The answer should include bullets describing the sequence of operations, actual commands used where applicable, and results in form of images or maps.