F Exercise 04

Last updated: 2022-02-21 17:13:56

F.1 Question 1

  • Read the Shapefile named nafot.shp, which includes polygons of “Nafa” administrative regions in Israel.
  • Calculate how many neighboring polygons each “Nafa” intersects with (not including self!).
  • Plot a map that shows the number of neighbors per “Nafa” (Figure F.1).
  • Remember: do not use specific values in your calculation, the number of neighbors needs to be calculated in the code!
Number of neighbors per "Nafa"

Figure F.1: Number of neighbors per “Nafa”

(50 points)

F.2 Question 1

  • Load the built-in data.frame object named world.cities from the maps package, as follows:
library(maps)
head(world.cities)
##                 name country.etc   pop   lat  long capital
## 1 'Abasan al-Jadidah   Palestine  5629 31.31 34.34       0
## 2 'Abasan al-Kabirah   Palestine 18999 31.32 34.35       0
## 3       'Abdul Hakim    Pakistan 47788 30.55 72.11       0
## 4 'Abdullah-as-Salam      Kuwait 21817 29.36 47.98       0
## 5              'Abud   Palestine  2456 32.03 35.07       0
## 6            'Abwein   Palestine  3434 32.03 35.20       0
  • The world.cities object is a table with information about world cities. The table includes the longitude and latitude of each city in the long and lat columns, respectively.
  • Read the Shapefile named nafot.shp, which includes polygons of “Nafa” administrative regions in Israel.
  • Subset those cities which intersect with the “Nafa” polygons.
  • Calculate cities density (cities / \(km^2\)) per “Nafa” polygon.
  • Plot the densities with a color scale, as shown in Figure F.2.
Cities density ($1/km^2$) in each "Nafa"

Figure F.2: Cities density (\(1/km^2\)) in each “Nafa”

(50 points)