Quiz 2

 1) (go to attribute table of cntry02, click pop_cntry, right-click choose sort descending)
China
India
United States
Indonesia
Russia
Brazil
Pakistan
Japan
Bangladesh
Nigeria

2) (go to river's attribute table, group Amazon together, count the number of rivers)
15 rivers

3) (go to selection "attribute table of the river layer, find the 2 rivers, and select them using ctrl and mouse click, then go to selection > select by location, selection method is select features from, target layer is cities, then source layer is rivers, spatial selection method is "features within a distance of source layer" check apply a search distance, 500 km, then ok, then the map would light up in a region, then go to cities, attribute table and print scree)

4) (go to country's attribute table, sort descending, find and select Iran > select by location > select features from > target layer is cntry02 > source layer is cntry02 > spatial selection method is within a distance > apply a distance of 300km > ok > open country;s attribute table, show selected > use statistics on pop_cntry)

 total population of countries: 516490670

5)  (go to country;s attribute table, select the Y of landlocked countries, click show selected records, right click on pop_cntry, click on sort descending, look for the most and least populous countries)

Most populous country: Ethiopia 53142970
Least populous country: Vatican City 860

6) (go to cities' attribute table, select Veszprem, go to select by location, select features from > target layer is cntry02 > source layer is cities > target layer's features are within a distance of the source layer feature > apply a search of 300 km > go to country's attribute table, click selected features)

Poland
Romania
Yugoslavia
Czech Republic
Hungary
Austria
Slovakia
Croatia
Bosnia & Herzegovina
Slovenia

7) (go to attributes table of country > find and select Chad > select by location > "select features from" > target layer is cntry02 > source layer is cntry02 > spatial selection method is "Target layer features touch the boundary of the source layer feature" > OK > open attribute table of country > show selected records > exclude Chad and copy the rest of the countries that border it.

Cameroon
Central African Republic
Libya
Niger
Nigeria
Sudan

8) (ArcToolBox > Analysis Tool > Statistics > Frequency > Input is cities > Frequency fields is CNTRY_NAME > open the newly created frequency table > sort descending on frequency tab > copy the first 5)

97 Russia
93 United States
72 Thailand
67 Turkey
50 Cote D'Ivory and Poland

9) (use measure and approximate the length of the three Niles flowing in Sudan)
2838 + 322 + 614 = 3774 km


10) (open attribute tables of lakes and eyeball to see which country has the most number of lakes > select all of the lakes of one country on attribute table > go to select by location > target layer is lake, source layer is lake > look at how many lakes there are in that country, repeat for top 5 countries)

1516 Russia

1340 Canada

743 USA

219 China

168 Sweden

11)  dissolve lakes layer > input lakes > dissolve: country_name > add field area > calculate geometry in sq km > sort in descending order

443517km2- Canada
196848km2- United States
138250km2- Russia
70900km2- Kazakhstan
53530km2-United Republic of Tanzania

12) Map showing world countries and lake boundaries.

 

Join dissolved lake with country > symbology > value > area > normalization > population