🚀 Tasks

Important

Due date for the tasks are listed in the schedule

Follow the instructions in Submission via GitHub Pages to create a new repo in the existing organization. Solve the tasks in a file named index.qmd.

Task 1

Download the datasets swissTLM3D and swissboundaries3d from swisstopo. Using swissTLM3d and swissboundaries3d, calculate the percentage of area covered by forest per canton. Visualize the results (in a map and / or a plot).

Render the document using quarto preview. Publish your result using quarto publish gh-pages

Task 2

We have prepared a duckdb database on moodle (wald-kantone.duckdb). This database contains two layers: The forest data from swissTLM3D and the canton boundaries from swissBOUNDARIES3D.

Use this dataset and with the help of DuckDB in practice, recreate Task 1 and measure the execution time using the R package tictoc.

Compare the execution time with Task 1. Discuss!

Task 3

Without consulting external help, try and specify the DE-9IM string for the queen and bishop’s case as shown in Figure 1.

Concentrate on the boundary-boundary intersection. Note:

• No intersection: F
• Point intersection: 0
• Line intersetion: 1
• Any intersection: *

The 3x3 “chessboard” is available on moodle.

(a) King’s case (all fields)

(b) Bishop’s case (diagonal fields)

Figure 1: Different cases for chess piece movements. The King can move in all directions, the Bishop only on the diagonals