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. 2021 May 27;16(5):e0251988. doi: 10.1371/journal.pone.0251988

Table 1. POI classification table.

Primary classification Secondary classification Three-level classification
Residential Residential district, business residential district Residential quarters, dormitories, villas, etc
Commercial and business facilities Shopping services, life services, automobile services, catering services, accommodation services, leisure and entertainment, finance Supermarkets, shopping centers, shopping streets, Chinese restaurants, foreign restaurants, star hotels, express hotels, cinemas, banks, ATM, credit cooperatives, etc
Industrial Incorporated business, industrial and mining factory building, parks Companies, factories, science and technology parks, industrial parks, etc
Administration and public services Government agencies and social organizations, health care, public facilities Government agencies, social organizations, public security organs, industrial and commercial tax authorities, hospitals, emergency centers, railway stations, airports, docks, etc
Science and education Institutions of higher learning, vocational colleges, middle schools, primary schools, scientific and educational places, cultural media Universities, middle schools, primary schools, kindergartens, vocational colleges, museums, libraries, art museums, archives, cultural palace, overseas study agencies, scientific research institutions, training institutions, etc
Green space Tourist attractions, Park Square Scenic spots, zoos, botanical gardens, parks, squares, churches, temples, etc