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Indonesian street network morphology — the driving network and the walking network, measured separately for the same place.

Menteng · Jakarta Pusat · Colonial grid

r = 800 m · 36 bin · Footway coverage 8.1% · thin

Menteng

Jakarta Pusat · Colonial grid

The Nieuwenhuijs and Moojen plan of the 1910s: broad axes, roundabout gardens, large blocks.

Read the two columns below as two readings of the same data rather than as a gap that can yet be concluded from. The gang here are not mapped densely enough for that.

Drive

34.5 km · 135 intersections/km²

Fig. 1 · r = 800 m — The drivable network inside the sampling disc. Uniform ink, no road-class hierarchy, no basemap: the shape is the subject.
NDrive · 355°–5° · 10.0%Drive · 5°–15° · 5.1%Drive · 15°–25° · 0.5%Drive · 25°–35° · 0.3%Drive · 35°–45° · 1.4%Drive · 45°–55° · 3.1%Drive · 55°–65° · 1.2%Drive · 65°–75° · 0.8%Drive · 75°–85° · 0.9%Drive · 85°–95° · 2.8%Drive · 95°–105° · 12.4%Drive · 105°–115° · 0.7%Drive · 115°–125° · 0.6%Drive · 125°–135° · 1.7%Drive · 135°–145° · 4.1%Drive · 145°–155° · 0.8%Drive · 155°–165° · 1.1%Drive · 165°–175° · 2.7%Drive · 175°–185° · 10.0%Drive · 185°–195° · 5.1%Drive · 195°–205° · 0.5%Drive · 205°–215° · 0.3%Drive · 215°–225° · 1.4%Drive · 225°–235° · 3.1%Drive · 235°–245° · 1.2%Drive · 245°–255° · 0.8%Drive · 255°–265° · 0.9%Drive · 265°–275° · 2.8%Drive · 275°–285° · 12.4%Drive · 285°–295° · 0.7%Drive · 295°–305° · 0.6%Drive · 305°–315° · 1.7%Drive · 315°–325° · 4.1%Drive · 325°–335° · 0.8%Drive · 335°–345° · 1.1%Drive · 345°–355° · 2.7%
Drive H 3.067 · φ 0.42

Walk

37.6 km · 194 intersections/km²

Fig. 2 · r = 800 m — The walkable network at the same centre, the same disc, the same extract. Every difference from the drawing beside it is the tag mapping, not a different place.
NWalk · 355°–5° · 9.3%Walk · 5°–15° · 6.2%Walk · 15°–25° · 0.4%Walk · 25°–35° · 0.4%Walk · 35°–45° · 1.4%Walk · 45°–55° · 2.9%Walk · 55°–65° · 1.2%Walk · 65°–75° · 0.8%Walk · 75°–85° · 1.0%Walk · 85°–95° · 2.8%Walk · 95°–105° · 12.1%Walk · 105°–115° · 0.7%Walk · 115°–125° · 0.6%Walk · 125°–135° · 1.6%Walk · 135°–145° · 3.8%Walk · 145°–155° · 0.9%Walk · 155°–165° · 1.4%Walk · 165°–175° · 2.5%Walk · 175°–185° · 9.3%Walk · 185°–195° · 6.2%Walk · 195°–205° · 0.4%Walk · 205°–215° · 0.4%Walk · 215°–225° · 1.4%Walk · 225°–235° · 2.9%Walk · 235°–245° · 1.2%Walk · 245°–255° · 0.8%Walk · 255°–265° · 1.0%Walk · 265°–275° · 2.8%Walk · 275°–285° · 12.1%Walk · 285°–295° · 0.7%Walk · 295°–305° · 0.6%Walk · 305°–315° · 1.6%Walk · 315°–325° · 3.8%Walk · 325°–335° · 0.9%Walk · 335°–345° · 1.4%Walk · 345°–355° · 2.5%
Walk H 3.088 · φ 0.40

Delta

+3.3

km of network reachable only on foot · 8.9% of the walking network

+59
intersections per km²
−4.3%
Dead-end
+0.022
ΔH · orientation entropy

Both roses overlaid

NDrive · 355°–5° · 10.0%Drive · 5°–15° · 5.1%Drive · 15°–25° · 0.5%Drive · 25°–35° · 0.3%Drive · 35°–45° · 1.4%Drive · 45°–55° · 3.1%Drive · 55°–65° · 1.2%Drive · 65°–75° · 0.8%Drive · 75°–85° · 0.9%Drive · 85°–95° · 2.8%Drive · 95°–105° · 12.4%Drive · 105°–115° · 0.7%Drive · 115°–125° · 0.6%Drive · 125°–135° · 1.7%Drive · 135°–145° · 4.1%Drive · 145°–155° · 0.8%Drive · 155°–165° · 1.1%Drive · 165°–175° · 2.7%Drive · 175°–185° · 10.0%Drive · 185°–195° · 5.1%Drive · 195°–205° · 0.5%Drive · 205°–215° · 0.3%Drive · 215°–225° · 1.4%Drive · 225°–235° · 3.1%Drive · 235°–245° · 1.2%Drive · 245°–255° · 0.8%Drive · 255°–265° · 0.9%Drive · 265°–275° · 2.8%Drive · 275°–285° · 12.4%Drive · 285°–295° · 0.7%Drive · 295°–305° · 0.6%Drive · 305°–315° · 1.7%Drive · 315°–325° · 4.1%Drive · 325°–335° · 0.8%Drive · 335°–345° · 1.1%Drive · 345°–355° · 2.7%Walk · 355°–5° · 9.3%Walk · 5°–15° · 6.2%Walk · 15°–25° · 0.4%Walk · 25°–35° · 0.4%Walk · 35°–45° · 1.4%Walk · 45°–55° · 2.9%Walk · 55°–65° · 1.2%Walk · 65°–75° · 0.8%Walk · 75°–85° · 1.0%Walk · 85°–95° · 2.8%Walk · 95°–105° · 12.1%Walk · 105°–115° · 0.7%Walk · 115°–125° · 0.6%Walk · 125°–135° · 1.6%Walk · 135°–145° · 3.8%Walk · 145°–155° · 0.9%Walk · 155°–165° · 1.4%Walk · 165°–175° · 2.5%Walk · 175°–185° · 9.3%Walk · 185°–195° · 6.2%Walk · 195°–205° · 0.4%Walk · 205°–215° · 0.4%Walk · 215°–225° · 1.4%Walk · 225°–235° · 2.9%Walk · 235°–245° · 1.2%Walk · 245°–255° · 0.8%Walk · 255°–265° · 1.0%Walk · 265°–275° · 2.8%Walk · 275°–285° · 12.1%Walk · 285°–295° · 0.7%Walk · 295°–305° · 0.6%Walk · 305°–315° · 1.6%Walk · 315°–325° · 3.8%Walk · 325°–335° · 0.9%Walk · 335°–345° · 1.4%Walk · 345°–355° · 2.5%
Drive H 3.067 · φ 0.42Walk H 3.088 · φ 0.40
  • Drive
  • Walk
  • Both

Two readings, one table

Hairlines: every site in the set, both modes. Marks: this site. A position, not a value — neither end is better.

Menteng: driving and walking network metrics, their difference, and their position among 33 sites.
MetricDriveWalkDeltaPosition among 33 sites
Orientation entropynat3.0673.088+0.022Drive: position 13 of 33; Walk: position 14 of 33, when the set is sorted by this metric, smallest first.
H / H max0.8560.862+0.006Drive: position 13 of 33; Walk: position 14 of 33, when the set is sorted by this metric, smallest first.
φ orientation-order0.4150.400−0.015Drive: position 21 of 33; Walk: position 20 of 33, when the set is sorted by this metric, smallest first.
Circuitysampled1.3941.369−0.024Drive: position 4 of 33; Walk: position 6 of 33, when the set is sorted by this metric, smallest first.
Average node degree2.392.51+0.13Drive: position 23 of 33; Walk: position 26 of 33, when the set is sorted by this metric, smallest first.
Four-way8.1%7.6%−0.5%Drive: position 27 of 33; Walk: position 19 of 33, when the set is sorted by this metric, smallest first.
Dead-end22.0%17.6%−4.3%Drive: position 4 of 33; Walk: position 1 of 33, when the set is sorted by this metric, smallest first.
Intersection density135 /km²194 /km²+59 /km²Drive: position 14 of 33; Walk: position 12 of 33, when the set is sorted by this metric, smallest first.
Median segment length28 m21 m−7 mDrive: position 3 of 33; Walk: position 4 of 33, when the set is sorted by this metric, smallest first.
Network length34.5 km37.6 km+3.1 kmDrive: position 17 of 33; Walk: position 13 of 33, when the set is sorted by this metric, smallest first.

H is in nats — the natural-log unit of information. That is why its maximum is ln 36 ≈ 3.584 rather than log₂ 36.

Circuity is an estimate: network distance over straight-line distance, averaged across a seeded sample of node pairs rather than across all of them. Drive: 468 pairs sampled · 25 pairs unreachable.Walk: 468 pairs sampled · 15 pairs unreachable. Pairs with no route between them at all are excluded from the mean. A large count means this network is fragmented — a signal about the data, not about the place.

Each street segment’s bearing goes into one of 36 bins of 10°, weighted by length: a 500 m road counts ten times a 50 m gang. Bar length is the share of network length running that way, not a count of segments. The rose is always 180°-symmetric, because one segment traversed both ways differs by exactly 180°. Boeing 2019 §3

Fig. 3 · r = 800 m

What walking adds

Ink: the edges that exist only in the walking network. Hairline: the network both modes share. Membership is decided by the tag mapping — an edge counts as walk-only when the OSM way it came from is not admitted to the driving network.
Walk-only length
3.3 km
Share of walking network
8.9%

Where these numbers come from

Drive

Nodes
519
Edges
619
Intersections (degree ≥ 3)
272
Disc area
2.01 km²
Intersection density
135 /km²
Rose weighted length
69.0 km
Per-edge circuity
1.015

Walk

Nodes
635
Edges
798
Intersections (degree ≥ 3)
390
Disc area
2.01 km²
Intersection density
194 /km²
Rose weighted length
75.2 km
Per-edge circuity
1.018

The intermediate values the column above is built from. Intersection density is the intersection count over the disc area; the weighted length is the denominator that turns a rose bar into a share. Two different circuity measures: the per-edge one compares each segment against its own chord, the sampled one compares distances between junctions. The first measures how much streets bend, the second how far out of your way the network takes you.

Rose as a table — 36 bins — Menteng
Share of network length per 10° bearing bin, for drive and walk.
BinBearing rangeP — DriveP — Walk−P·ln P−P·ln P
00355°–5°9.98%9.26%0.22990.2204
015°–15°5.08%6.16%0.15130.1718
0215°–25°0.46%0.43%0.02460.0236
0325°–35°0.34%0.39%0.01950.0215
0435°–45°1.40%1.37%0.05970.0588
0545°–55°3.09%2.88%0.10740.1022
0655°–65°1.20%1.17%0.05310.0522
0765°–75°0.78%0.77%0.03790.0373
0875°–85°0.93%1.00%0.04350.0459
0985°–95°2.78%2.84%0.09970.1011
1095°–105°12.37%12.10%0.25850.2556
11105°–115°0.66%0.69%0.03300.0343
12115°–125°0.58%0.62%0.02970.0313
13125°–135°1.68%1.63%0.06860.0671
14135°–145°4.07%3.83%0.13040.1250
15145°–155°0.84%0.90%0.04030.0425
16155°–165°1.09%1.43%0.04910.0607
17165°–175°2.69%2.52%0.09710.0927
18175°–185°9.98%9.26%0.22990.2204
19185°–195°5.08%6.16%0.15130.1718
20195°–205°0.46%0.43%0.02460.0236
21205°–215°0.34%0.39%0.01950.0215
22215°–225°1.40%1.37%0.05970.0588
23225°–235°3.09%2.88%0.10740.1022
24235°–245°1.20%1.17%0.05310.0522
25245°–255°0.78%0.77%0.03790.0373
26255°–265°0.93%1.00%0.04350.0459
27265°–275°2.78%2.84%0.09970.1011
28275°–285°12.37%12.10%0.25850.2556
29285°–295°0.66%0.69%0.03300.0343
30295°–305°0.58%0.62%0.02970.0313
31305°–315°1.68%1.63%0.06860.0671
32315°–325°4.07%3.83%0.13040.1250
33325°–335°0.84%0.90%0.04030.0425
34335°–345°1.09%1.43%0.04910.0607
35345°–355°2.69%2.52%0.09710.0927
Sum = H3.0673.088

The last column is each bin’s term in H = −Σ P(i)·ln P(i). Add the thirty-six of them and you get the H printed under the rose. An empty bin contributes zero.

Download this site’s data (JSON, ODbL)

Data jalan © OpenStreetMap contributors, ODbL 1.0. Basis data turunan ini ditawarkan dengan lisensi yang sama. · Boeing, G. 2019. Urban Spatial Order: Street Network Orientation, Configuration, and Entropy. Applied Network Science 4(1):67.