Assumptions
Which tag values count as drivable and which as walkable is a modelling choice, not a fact. It changes every number in this product, so it is exposed as a control rather than buried as a constant.
All three mappings below are computed in full by the pipeline at build time. Switching between them shows numbers that already exist rather than recomputing in the browser — this page makes no network request at all.
What survives, and what does not
The conclusion from the tables below, computed rather than guessed. Robust: Orientation entropy — H, Circuity, Average node degree. Moderate: φ orientation-order, Dead-end proportion. Sensitive: Four-way proportion, Intersection density, Median segment length, Network length — those only mean anything stated together with their mapping, and must not be compared against figures from a study that used a different one.
The pattern makes sense. Measures that answer “which way do the streets run” survive, because adding or removing a class rarely changes the overall directions. Measures that answer “how much street is there” do not, because that is exactly what the mapping decision changes. φ falls between the two: it is derived from entropy, but the square in its formula amplifies a small movement.
The tag mapping
The same mapping, drawn
The same disc, different tag mappings. The numbers in the tables above move because these are the lines coming and going. Only two exemplar sites carry these drawings: geometry is most of the derived database, and carrying it for all sixteen would multiply it for a figure shown twice.
KayutanganMalang · r = 800 m
Drive
Default · 30.2 km
Strict drive · 23.1 km
Narrow walk · 30.2 km
Walk
Default · 54.8 km
Strict drive · 54.8 km
Narrow walk · 53.4 km
BSD City — klusterTangerang Selatan · r = 800 m
Drive
Default · 26.1 km
Strict drive · 15.0 km
Narrow walk · 26.1 km
Walk
Default · 35.6 km
Strict drive · 35.6 km
Narrow walk · 28.6 km
Footway coverage per site
The headline finding depends on gang being mapped. If a kampung’s alleys are absent from OpenStreetMap its walking network collapses toward its driving network and the gap disappears — not because it is not there, but because nobody mapped it. This is a measure of the data, not of the place.
| Site | Footway coverage | Confidence | m/km² |
|---|---|---|---|
| Menteng | 8.1% | thin | 1522 |
| Kota Tua | 10.5% | thin | 2434 |
| Kota Lama | 1.9% | thin | 485 |
| Kampung Bendungan Hilir | 18.9% | moderate | 5989 |
| Kampung Melayu | 2.6% | thin | 700 |
| Kampung Code | 19.6% | moderate | 5150 |
| Kampung Lette | 4.1% | thin | 912 |
| Kampung Braga | 35.4% | good | 10276 |
| Kotagede | 26.2% | moderate | 7627 |
| Kayutangan | 17.2% | moderate | 4680 |
| Pantai Indah Kapuk | 31.5% | moderate | 3768 |
| BSD City — kluster | 33.9% | moderate | 6004 |
| Alam Sutera | 10.5% | thin | 1627 |
| Gading Serpong | 1.4% | thin | 334 |
| Panakkukang | 2.7% | thin | 641 |
| Empang | 19.7% | moderate | 4361 |
| Pasar Atas | 21.2% | moderate | 3675 |
| Ubud | 15.8% | moderate | 2150 |
| Kebayoran Baru | 27.9% | moderate | 7182 |
| Cihapit | 25.9% | moderate | 8487 |
| Pathuk | 25.0% | moderate | 6001 |
| Kesepuhan | 20.6% | moderate | 2988 |
| Sanur Kaja | 30.5% | moderate | 4144 |
| Gadang | 25.3% | moderate | 6988 |
| Gapuk Utara | 18.0% | moderate | 4542 |
| Hamadi | 15.3% | moderate | 1286 |
| Cipayung | 36.4% | good | 10600 |
| Kampung Bugis | 27.3% | moderate | 2109 |
| Palangka | 21.9% | moderate | 6381 |
| Lasoani | 20.7% | moderate | 3720 |
| Penurunan | 15.8% | moderate | 1977 |
| Singkawang Tengah | 15.4% | moderate | 3656 |
| IKN — Kawasan Inti | 0.0% | thin | 0 |