Home assignment 3

Home assignment 3

Last updated: 2022-06-22 18:56:04

Question 1

  • Read the world_cities.csv file into a DataFrame object.

  • Calculate and print a new table, where each row represents a country, with the following columns:

    • "country"—Country name

    • "capital"—The name of the capital city

    • "pop_total"—The total population (population in all cities summed)

  • Note that for some countries there is more than one value marked as the capital! The resulting table still needs to have one row per country: capital name ("capital") should be the first if there is more than one, while total population ("pop_total") needs to be the sum of all cities (regardless of duplicates).

country capital pop_total
0 Afghanistan Kabul 7543856
1 Albania Tirana 1536232
2 Algeria Algiers 20508642
3 American Samoa Pago Pago 58021
4 Andorra Andorra la Vella 69031
... ... ... ...
223 Wallis and Futuna Mata'utu 11380
224 Western Sahara al-'Ayun 338786
225 Yemen San'a 5492077
226 Zambia Lusaka 4032170
227 Zimbabwe Harare 4231859

228 rows × 3 columns

Question 2

  • The text file named bgu.wkt (see Sample data) contains a WKT string representing the geometry of the BGU logo.

  • Read the WKT string from the bgu.wkt file, using the open and .readline methods (see Working with files). Convert the string into a shapely geometry

  • Note: Do not copy and paste the WKT string into your code! You need to read it from the bgu.wkt file.

  • Display the logo graphically.

  • Calculate the area of the logo.

  • Calculate a circle that is enclosing the logo. To do that, first calculate the average of x-axis bounds and the average of the y-axis bounds, then construct a point according to those x and y values, and finally buffer the point to a distance of your choice so that the logo is completely within the buffer.

  • Calculate the geometry of the difference between the logo and the bouding circle you calculated, then plot it.