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!)