![]() 910 Geography |
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Table of Contents
1. OverviewGeography is the confluence of geophysics and sociology. In the olden days, an observent traveler could visit far off places, return home, and make useful contributions by describing seashores, lakes, rivers, mountain ranges, flora and fauna, and the peoples of the region. S/he might even note the impact of environmental context on social constructs. Each of these fields has now become so sophisticated that it takes a team to reach useful conclusions.
At this point we can review what (atlases), how (GIS), and why (travel).
2. Large Scale vs Small ScaleThese can be confusing. It would seem that a map of the US is a "larger scale" than a map of my neighborhood, but it is just the reverse. Here's why:
A boat's fully lofted plan is 1:1 scale and thus large scale. A floorplan of an office buildign is smaller scale than the boat loft, but larger scale than a city map. A city map is larger scale than a world map. Adding to the confusion, the "map scale" ratio numer gets bigger as the scale gets smaller. From bolstad2005, p115:
3. What: Atlases, maps, and chartsGiven 3D location on Earth's surface, what is useful to capture and convey in a map? That depends on the map's purpose. A high quality world atlas (e.g., oxfordatlas) provides an overview of landforms, water systems, climate, flora, and human-generated structures. This is the place to go when, say, you hear that your government is intending to bomb country X. Where is X, what is nearby, and what minerals are found there? Topological maps (e.g., http://topomaps.usgs.gov/) concetrate on elevation and water systems. Nautical charts (e.g., http://www.nauticalcharts.noaa.gov/) provide details about what is important to navigation -- esp how to safely leave and approach landfall. Specialized maps may show minerals deposits, soild types, powerlines, sewer systems, population density of red-headed left-handers, etc.
4. How: Geograpical Information Systems (GIS)In the olden days, maps were drawn from field notes and triangulated on-site surveys. These days aircraft, spacecraft, GPS, and computers give us an extrodinary understanding of the physical landscape -- from the overall shape of the Earth, to meter-by-meter elevations, to dominant flora, to manmade structures. We then add additional knowledge from databases to make maps. THis is all made possible by computer-based GIS. See bolstad2005 to get into the game. Then obtain software packages to become productive in the field. As with all other fields, I use OSS packages, with Python bindings. See:
5. Why: Travel TalesWhy do we care about distant lands, and why do the folks there behave as they do? See Creation_Myth for my understanding of why we care, and see History for context for why "they" behave so oddly (of course they think the tourist is rather odd too). In this day of homogenized, MacWorld, globalization, it is refreshing to read accounts of first encounters (or even relatively naive encounters) among cultures. See Marco Polo, Magellan, Lewis & Clark, Joshua Slocum, Richard Burton, Richard Halliburton, and now Rick Steves. People who had the gumption to go see for themselves and then tell the rest of us what they found.
6. Culture by CultureI have tackled several. In each I tried to:
Specific cases:
7. References
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Creator: Harry George Updated/Created: 2013-02-24 |