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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

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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

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
Orientation entropy
3.067nat
H / H max
0.856
φ orientation-order
0.415
Circuity
1.394~468
Average node degree
2.39
Four-way
8.1%
Dead-end
22.0%
Intersection density
135 /km²
Median segment length
28 m
Network length
34.5 km

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. 468 pairs sampled · 25 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.

Where these come from

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

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.

Walk

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
Orientation entropy
3.088nat
H / H max
0.862
φ orientation-order
0.400
Circuity
1.369~468
Average node degree
2.51
Four-way
7.6%
Dead-end
17.6%
Intersection density
194 /km²
Median segment length
21 m
Network length
37.6 km

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. 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.

Where these come from

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.

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
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
  • Drive
  • Walk
  • Both

DeltaWalk − Drive

Orientation entropy
+0.022
H / H max
+0.006
φ orientation-order
−0.015
Circuity
−0.024
Average node degree
+0.13
Four-way
−0.5%
Dead-end
−4.3%
Intersection density
+59
Median segment length
−7
Network length
+3.1

What walking adds

Walk-only length
3.3 km
Share of walking network
8.9%
Fig. 3 · r = 800 m — 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.
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.