ESS241H1 Lecture Notes - Lecture 1: Seismic Refraction, Plate Tectonics, Geodesy
Document Summary
Tools: field observations (hand sample, outcrop) geologic maps remote sensing (airborne + satellite) mine & drill-hole observations geophysics (seismic refraction & reflection) and geodesy (displacements laboratory numerical & analog modeling. Focal point ), equal shape (=conformal) your choice of map depends on what you want to show great circle vs rhumb line e. g. mercator projection preserves angles - good for sailing: utm (universal transfer mercator) A light in the centre of the earth that projects the earth onto a cylinder horizontal cylinders touch the globe along a meridian. 60 zones (=60 cylinders) covers 6 degrees each northing= distance in m from equator (or south pole) easting= distance from central meridian plus 500km added: elevation usually shown as contour lines can extract a cross section. Other things you can see on maps: boundaries water bodies & rivers built up areas important buildings vegetated areas map north, compass north & meridian north.
