TechnicalGIS

#spopt

2 posts

Tutorial Python

Geodemographic classification in Python: k-means on Census 2021 Output Areas, and SKATER and max-p regionalisation

Build a small geodemographic classification of Cardiff's 1,115 Census 2021 Output Areas in Python: choose and transform variables from Nomis bulk tables, standardise them, check correlations, choose k for k-means with the elbow, silhouette and stability across seeds, profile and cautiously name the clusters with index scores and radar charts, compare the result with the official 2021/2 OAC, test the MAUP at LSOA level, and contrast it with contiguous regions from spopt's SKATER and max-p.

Intermediate 17 min read

Tutorial Python Part 2 of 2

Location-allocation in Python: p-median, p-center and maximal covering (MCLP) with spopt

Solve location-allocation problems in Python with spopt and the CBC solver: the p-median, p-center and maximal covering location problem (MCLP). Choose sites for new urgent-care or mobile clinic bases among Cornwall's community buildings, on OSMnx drive times and Census 2021 population, compare the three answers on maps and charts, draw the trade-off curve as the number of sites grows, and see how problem size drives solve time.

Intermediate 17 min read