- The properties that are maintained by the Robinson projection are it minimizes distortion near the equator, provides a clear view of the Earth’s topographical features, shows the entire world on one flat map, and is the projection that is the most popular among everyone. The problem with this map is that near the poles is where most distortion occurs. Also, this projection is not too good with navigation as it has compression on multiple countries. It is called a compromise projection because it doesn’t eliminate all distortion but keeps levels of distortion relatively low.
- A line of constant direction
- The line of constant direction maintains a constant bearing relative to true or magnetic north so it would be useful for navigation. It is a line on the surface of Earth making the same angles with all meridians. The lines make it a simple method to get from point A to point B. The type of application that this line would be useful for would include directional maps like the Mercator that Google Maps uses. Direction, shape and angles are kept if you use a projection with a line of constant direction.
- find the shortest path between the two stations
- Yes, the line connecting Rothera station to McMurdo station would be the shortest path between the two stations. This is because the Stereographic projection is an azimuthal conformal projection that keeps angles and shapes. The azimuthal projections are commonly used for mapping polar regions like the Arctic or Antarctica. An important property of stereographic projection is that it preserves circles on the sphere, known as great circles, as straight lines on the plane. Great circles are the biggest circles that can be sketched on a sphere, and the shortest distance between two points on a sphere follows a great circle. Stereographic projections help visualize great circles, which makes it easy to measure the shortest path. The Stereographic projection is only used to measure short distances and can’t be used to measure the shortest distance over a large area.
- Correct Answer by TA: Neither Rothera nor McMurdo stations are at the pole, so a line between them is not an arc of a great circle/does not represent the shortest path. Distance is not preserved on a stereographic projection, so the line cannot be used to measure distance either.
- Two standard parallels: 43rd parallel north and 62nd parallel north Central Meridian: 10° east of Greenwich
- If we were to center the Albers Equal Area Conic projection onto North America, the parameters that would change would be the two standard parallels, the meridian, and the amount of distortion in different countries. The central meridian is the line of longitude where the map projection has the least distortion. In the Europe Albers Equal Area Conic projection, this central meridian would typically be set somewhere in Europe because the projection is optimized for that region. For North America, the central meridian has to be closer to the center of North America. For example, the Canada Albers Equal Area Conic projection has parallels at 50 and 70 and a meridian at -96. This projection allows Canada and most of the US to have areas relatively the same but distorts the shapes of countries.
- For the map of Ontario, Standard Parallel: 56th parallel north 42nd parallel north Meridian: 86˚ west of Greenwich or -86˚ (center of Ontario)
- Lab 4
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