GEOG 141 Lecture Notes - Lecture 3: Transatlantic Flight, Gravity Anomaly, Geoid

• School: University of Oregon
• Department: Geography
• Course: GEOG 141
• Professor: Devin Lea

Document Summary

Earth"s shape, size, and locations: ea(cid:396)th(cid:859)s hape, topi(cid:272) of ea(cid:396)th(cid:859)s shape is a good pla(cid:272)e to sta(cid:396)t fo(cid:396) (cid:1006) (cid:396)easo(cid:374)s: If you stick a stick in the ground, it will produce a shadow. The force of attraction, or gravity, between two objects depends on their mass and the distance between them. Images from space: satellites, probes and people have gone to space, ea(cid:396)th(cid:859)s shape i(cid:374) (cid:373)o(cid:396)e detail, the earth is not exactly round. This means any line of longitude could be the prime meridian. In the 1800s our world was becoming increasingly interconnected by new transportation modes such as trains and steam ships. The problem with countries using their own prime meridians in this sense was that all countries based clock times on their own prime meridians and local sun angles: g(cid:396)ee(cid:374)(cid:449)i(cid:272)h (cid:373)e(cid:396)idia(cid:374) is the (cid:862)(cid:374)eut(cid:396)al(cid:863) (cid:373)e(cid:396)idia(cid:374). Lo(cid:374)gitudi(cid:374)al (cid:448)alues (cid:396)a(cid:374)ge f(cid:396)o(cid:373) (cid:1004) to 180 degrees on the opposite side of the earth.