Exercise 4 hints

General

• Documentation of the Travel Time Matrix dataset and explanation for different column names can be found at the Accessibility Research Group website: Helsinki Region Travel Time Matrix 2015

Problem 1

• Note that the input travel time data is stored in text files when reading in the data.
• Keep columns ‘from_id’,`’to_id’,’pt_r_tt’` and ‘car_r_t’ in the travel time data files
• Join the data using columns ‘from_id’ from the travel time data, and ‘YKR_ID’ in the grid-shapefile
• See hints for joining the travel time data to the grid shapefile from our earlier materials from the lesson regarding classifying the bogs via the landuse legend file.
• Plotting the data takes a while (be patient!)