Table 1 Sizes of the studied cities.

From: Multilayer networks describing urban interactions for building the digital twins of five cities in Spain

City

D

N

NNH

NEU

NTOT

Barcelona

10

1,666,530

16,456

129,644

1,812,630

Valencia

19

801,545

75,708

2,193

879,446

Sevilla

11

701,455

2,655

64,371

768,491

Zaragoza

12

681,877

6,905

17,396

706,178

Murcia

8

459,403

1,335

31,800

492,538

  1. D is the number of districts considered by the census, N is the population according to the available data, NNH is the population living in nursing homes, NEU is the number of external university students and NTOT = N + NNH + NEU.
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