Andrew Lakin
1. Data for my labs will be stored in: J:\isis\html\courses\2010spring\geog\370\006\data
2. n/a (cannot save permissions)
3. My home directory drive is the H: drive. I will save my lab reports in my onyen folder on the J: drive.
4. If I wanted to save a file in an ATN lab so that only I could see it, I would save the file in my private folder on the H: drive.
5. http://www.unc.edu/~lakin is my personal website.
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7. A layer is a set of digital map features that share a common theme in coregistration with other layers. In the San Diego exercise, “Major Attractions” is an example of a layer.
8. A feature is a single entity that composes part of a landscape. A layer is composed of a collection of features. To be represented on a map, a feature must have location information as well as geometry.
9. On a map, scale is the ration which describes the relationship between a distance on a map and the corresponding distance on earth. A small scale (1:500,000,000 for example) has much less detail and depicts a large area. A large scale (1:1,000 for example) has much more detail and depicts a smaller area of land.
10. There are two views for working with data in ArcMap. In data view, you can edit, query, analyze, explore and symbolize data. The second type, layout view, you can arrange data frames and add other map elements such as legends, titles, etc…. In layout view you can view multiple frames at a time, whereas in data view you can only view one at a time.
11. CLEAR – deletes the current coordinate system being used
TRANSFORMATIONS – Allows you to convert from one coordinate system to another.
MODIFY – Allows you to make specific changes to the current coordinate system
IMPORT – Allows you to import a coordinate system from the computer’s hard drive
NEW – Allows you to create a new coordinate system manually
ADD TO FAVORITES – Allows you to save a coordinate system for future use
12. Yes, the shape and appearance of the United States has changed slightly. In the first projection, the map was stretched out from west to east. The map now appears more condensed and slightly circular at the top.
13. False_Easting: 0.0000000000000000
False_Northing: 0.00000000000000000
Central_Meridian: -96.00000000000000
Standard_Parallel_1: 29.50000000000000
Standard_Parallel_2: 45.50000000000000
Latitude_Of_Origin: 37.500000000000000
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I believe that the Albers equal area projection is appropriate when viewing the entire world. The view is best described as a conic projection. The viewer sees the North Pole at the top of the globe, with expanding cone shaped sides. North America is centered on this map.
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In this layout view, we have 4 separate data frames. They were created by copy and pasting the original data frame (the one in the top left corner of the page layout. This layout view is a useful way to look and work with multiple data frames at one time.
16. In the Unprojected map, the projection is completely flat, with no attempt to display the spherical aspects of the globe. In the Mercator projection, Antarctica is very large and blocked shape. It appears to be out of proportion. The Robinson projection appears to be a condensed version of the unprojected or North America 1983 map. The Sinusoidal projection is the most condensed of the 4 projections. It appears to be projected onto a sphere shape.
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