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Investigating World Demography Using GIS - Answer Key Author: Joseph J. Kerski, USGS, jjkerski@usgs.gov, 303-202-4315 1) [ cntry95.shp 6,396 KB ] 2) [The .shp file contains the geometry for cntry95 file - nodes, lines, polygons. The .dbf file contains the attributes for the cntry95. The .dbf file is smaller because there is just one row needed to store data about each country. ] 3) [ A 30-degree grid of Earth's latitude and longitude lines.] 4) [Shows attribute information about the country selected.] 5) [Latitude-Longitude - Geographic] 6) [ 258 ] 7) [ 21 ] 8) [ 5,631,139,650 ] 9) [ Sorts the rows or records in Ascending order (smallest to largest value) or descending order (largest to smallest value). ] 10) [ Indonesia ] 11) [ 189,331,200 ] 12) [ Tokelau ] 13) [ 1,600 ] 14) [ Pacific ] 15) [ Russia ] 16) [ 16,851,940 sqkm ] 17) [ Baker Island ] 18) [ 4 fields ] 19) [ The countries are colored based on the population of each country. One color is used to represent each of the default classes. ]20) [ - 99999 - 13,772,710 ] 21) [ 1600 ] 22) [ In the previous operation you told ArcView not to select those records that contained the null value of -99999. The record with the next lowest population value was 1600. ]23) [Those countries that met the selection criteria ( population > 95,000,000) are highlighted in yellow.] 24) [ 1 ] 25) [ Nigeria ] 26) [ 168 ] 27) [ Less ] 28) [ Fips_code ] 29) [ Fips_cntry ] 30) [ The number of fields or columns increased by 27. The join merges the fields of the two tables together. The length remained at 258 records. ] 31) [ These fields contain blanks or spaces. ] 32) [ The number of of fields you can map has increased by 25, by joining the tables. ] 33) [The new country shapefile was created with the same data (records/attributes) that were contained in the cntry95 theme after the tables were joined. ] 34) [ Rwanda ] 35) [ Guinea-Bissau ] 36) [ Countries with high life expectancy have lower birth rates, and vice versa. ] 37) [ 17 ] 38) [ 39) [ Demographic characteristics vary widely across the world. Birth rates and life expectancies are inversely related. Other answers possible. ] 40) [ ArcView GIS includes powerful tools to sort, query, select, and analyze maps and tables. ]
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U.S.
Department of the Interior
U.S. Geological Survey Rocky Mountain Mapping Center Maintainer:webmaster@rockyweb.cr.usgs.gov URL:http://rockyweb.cr.usgs.gov /public/outreach/sgu/worlddemographylesson_answers.html Last modified: 4 October 2004 |