Lab 3 submission

.pdf

School

University of Waterloo *

*We aren’t endorsed by this school

Course

181

Subject

Geography

Date

Dec 6, 2023

Type

pdf

Pages

4

Uploaded by AdmiralLark3870

Report
1) Map CRS name and EPSG ID CRS type (geographic, or projected) Geometric relationship(s) preserved WGS 84 (EPSG:4326) Geographic None World_Azimuthal_Equidistant (EPSG:54032) Projected Distance, direction World_Mollweide (EPSG:54009) Projected area WGS 84 / Pseudo Mercator (EPSG:3857) Projected Direction, Shape
World_Robinson (EPSG:54030) Projected none 2)a) World Mollweide (EPSG:54009) vs WGS 84/ Pseudo Mercator (EPSG:3857) projection When comparing the two projections, a difference that is immediately noticed is that the polar regions are much more distorted in the Pseudo Mercator projection, as they are shown with a distorted area, while the World Mollweide projection appears to display its area more accurately. This can also be seen by analyzing the Tissot circles, the Mercator projection shows the circles increasing in size the further they are from the standard line/equator, while the Mollweide projection shows all the circles having a similar area. By observing the Tissot circles of the Mollweide projection, it can also be seen that there is distortion in the shape as they approach the poles. In comparison, the Mercator projection has little to no distortions in shape. When observing the graticule lines of the Mollweide projection the longitude lines come to a point at both poles, whereas the Mercator projection ’ s lines are parallel and do not come to a point. Mollweide ’ s lines show that distance, shape and direction get more distorted as you get closer to the edges while points around the center have little distortion, compared to the Mercator projection whose lines do not come to a point while being straight and parallel, meaning the shape and direction are preserved throughout the map. b) deforestation around the globe over the past 10 years I would choose the Mollweide projection. When showing deforestation, the most important geometric relationship to preserve is the area of land so that the area of deforestation can be clearly seen with little distortions. Even though the shape, direction and distance in a Mollweide projection are distorted it doesn ’ t matter as much as area. If deforestation was only being shown at a specific point in the map, then a different projection could be chosen that would preserve more than just area, however, since it is global the area on all parts of the map must be preserved. Most of the map has little distortions and only increases when going towards the poles, this is useful as a majority of deforestation does not occur at the poles, this means that a majority of deforestation displayed will have less distortions.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help