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

Alam Sutera · Tangerang · New town

r = 800 m · 36 bin · Footway coverage 10.5% · thin

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Alam Sutera

Tangerang · New town

A new town of curvilinear streets and a firm road hierarchy.

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° · 11.3%Drive · 5°–15° · 2.8%Drive · 15°–25° · 1.5%Drive · 25°–35° · 1.2%Drive · 35°–45° · 1.1%Drive · 45°–55° · 2.8%Drive · 55°–65° · 2.0%Drive · 65°–75° · 0.2%Drive · 75°–85° · 1.4%Drive · 85°–95° · 9.6%Drive · 95°–105° · 2.4%Drive · 105°–115° · 3.2%Drive · 115°–125° · 0.9%Drive · 125°–135° · 2.0%Drive · 135°–145° · 1.3%Drive · 145°–155° · 1.9%Drive · 155°–165° · 2.1%Drive · 165°–175° · 2.6%Drive · 175°–185° · 11.3%Drive · 185°–195° · 2.8%Drive · 195°–205° · 1.5%Drive · 205°–215° · 1.2%Drive · 215°–225° · 1.1%Drive · 225°–235° · 2.8%Drive · 235°–245° · 2.0%Drive · 245°–255° · 0.2%Drive · 255°–265° · 1.4%Drive · 265°–275° · 9.6%Drive · 275°–285° · 2.4%Drive · 285°–295° · 3.2%Drive · 295°–305° · 0.9%Drive · 305°–315° · 2.0%Drive · 315°–325° · 1.3%Drive · 325°–335° · 1.9%Drive · 335°–345° · 2.1%Drive · 345°–355° · 2.6%
Drive H 3.214 · φ 0.31
Orientation entropy
3.214nat
H / H max
0.897
φ orientation-order
0.308
Circuity
1.585~335
Average node degree
2.30
Four-way
5.1%
Dead-end
34.1%
Intersection density
142 /km²
Median segment length
28 m
Network length
25.1 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. 335 pairs sampled · 157 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
487
Edges
559
Intersections (degree ≥ 3)
285
Disc area
2.01 km²
Intersection density
142 /km²
Rose weighted length
50.2 km
Per-edge circuity
1.051

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° · 9.7%Walk · 5°–15° · 3.1%Walk · 15°–25° · 1.7%Walk · 25°–35° · 1.1%Walk · 35°–45° · 1.2%Walk · 45°–55° · 2.8%Walk · 55°–65° · 1.7%Walk · 65°–75° · 0.3%Walk · 75°–85° · 1.3%Walk · 85°–95° · 9.2%Walk · 95°–105° · 4.5%Walk · 105°–115° · 2.7%Walk · 115°–125° · 1.0%Walk · 125°–135° · 1.9%Walk · 135°–145° · 1.2%Walk · 145°–155° · 2.1%Walk · 155°–165° · 1.9%Walk · 165°–175° · 2.3%Walk · 175°–185° · 9.7%Walk · 185°–195° · 3.1%Walk · 195°–205° · 1.7%Walk · 205°–215° · 1.1%Walk · 215°–225° · 1.2%Walk · 225°–235° · 2.8%Walk · 235°–245° · 1.7%Walk · 245°–255° · 0.3%Walk · 255°–265° · 1.3%Walk · 265°–275° · 9.2%Walk · 275°–285° · 4.5%Walk · 285°–295° · 2.7%Walk · 295°–305° · 1.0%Walk · 305°–315° · 1.9%Walk · 315°–325° · 1.2%Walk · 325°–335° · 2.1%Walk · 335°–345° · 1.9%Walk · 345°–355° · 2.3%
Walk H 3.265 · φ 0.27
Orientation entropy
3.265nat
H / H max
0.911
φ orientation-order
0.269
Circuity
1.627~357
Average node degree
2.39
Four-way
7.5%
Dead-end
30.6%
Intersection density
173 /km²
Median segment length
28 m
Network length
31.2 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. 357 pairs sampled · 129 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
571
Edges
681
Intersections (degree ≥ 3)
348
Disc area
2.01 km²
Intersection density
173 /km²
Rose weighted length
62.3 km
Per-edge circuity
1.047

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° · 11.3%Drive · 5°–15° · 2.8%Drive · 15°–25° · 1.5%Drive · 25°–35° · 1.2%Drive · 35°–45° · 1.1%Drive · 45°–55° · 2.8%Drive · 55°–65° · 2.0%Drive · 65°–75° · 0.2%Drive · 75°–85° · 1.4%Drive · 85°–95° · 9.6%Drive · 95°–105° · 2.4%Drive · 105°–115° · 3.2%Drive · 115°–125° · 0.9%Drive · 125°–135° · 2.0%Drive · 135°–145° · 1.3%Drive · 145°–155° · 1.9%Drive · 155°–165° · 2.1%Drive · 165°–175° · 2.6%Drive · 175°–185° · 11.3%Drive · 185°–195° · 2.8%Drive · 195°–205° · 1.5%Drive · 205°–215° · 1.2%Drive · 215°–225° · 1.1%Drive · 225°–235° · 2.8%Drive · 235°–245° · 2.0%Drive · 245°–255° · 0.2%Drive · 255°–265° · 1.4%Drive · 265°–275° · 9.6%Drive · 275°–285° · 2.4%Drive · 285°–295° · 3.2%Drive · 295°–305° · 0.9%Drive · 305°–315° · 2.0%Drive · 315°–325° · 1.3%Drive · 325°–335° · 1.9%Drive · 335°–345° · 2.1%Drive · 345°–355° · 2.6%Walk · 355°–5° · 9.7%Walk · 5°–15° · 3.1%Walk · 15°–25° · 1.7%Walk · 25°–35° · 1.1%Walk · 35°–45° · 1.2%Walk · 45°–55° · 2.8%Walk · 55°–65° · 1.7%Walk · 65°–75° · 0.3%Walk · 75°–85° · 1.3%Walk · 85°–95° · 9.2%Walk · 95°–105° · 4.5%Walk · 105°–115° · 2.7%Walk · 115°–125° · 1.0%Walk · 125°–135° · 1.9%Walk · 135°–145° · 1.2%Walk · 145°–155° · 2.1%Walk · 155°–165° · 1.9%Walk · 165°–175° · 2.3%Walk · 175°–185° · 9.7%Walk · 185°–195° · 3.1%Walk · 195°–205° · 1.7%Walk · 205°–215° · 1.1%Walk · 215°–225° · 1.2%Walk · 225°–235° · 2.8%Walk · 235°–245° · 1.7%Walk · 245°–255° · 0.3%Walk · 255°–265° · 1.3%Walk · 265°–275° · 9.2%Walk · 275°–285° · 4.5%Walk · 285°–295° · 2.7%Walk · 295°–305° · 1.0%Walk · 305°–315° · 1.9%Walk · 315°–325° · 1.2%Walk · 325°–335° · 2.1%Walk · 335°–345° · 1.9%Walk · 345°–355° · 2.3%
Drive H 3.214 · φ 0.31Walk H 3.265 · φ 0.27
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
+0.051
H / H max
+0.014
φ orientation-order
−0.039
Circuity
+0.042
Average node degree
+0.09
Four-way
+2.4%
Dead-end
−3.4%
Intersection density
+31
Median segment length
+0
Network length
+6.0

What walking adds

Walk-only length
6.1 km
Share of walking network
19.6%
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 — Alam Sutera
Share of network length per 10° bearing bin, for drive and walk.
BinBearing rangeP — DriveP — Walk−P·ln P−P·ln P
00355°–5°11.29%9.71%0.24630.2264
015°–15°2.77%3.15%0.09940.1088
0215°–25°1.49%1.71%0.06280.0694
0325°–35°1.19%1.11%0.05280.0501
0435°–45°1.11%1.19%0.05000.0527
0545°–55°2.80%2.78%0.10020.0997
0655°–65°1.97%1.73%0.07730.0702
0765°–75°0.15%0.35%0.00980.0196
0875°–85°1.39%1.31%0.05950.0568
0985°–95°9.56%9.22%0.22440.2197
1095°–105°2.38%4.55%0.08900.1405
11105°–115°3.18%2.72%0.10970.0981
12115°–125°0.92%1.02%0.04320.0469
13125°–135°1.98%1.93%0.07760.0762
14135°–145°1.27%1.21%0.05550.0535
15145°–155°1.90%2.10%0.07530.0811
16155°–165°2.06%1.90%0.08000.0753
17165°–175°2.57%2.32%0.09410.0873
18175°–185°11.29%9.71%0.24630.2264
19185°–195°2.77%3.15%0.09940.1088
20195°–205°1.49%1.71%0.06280.0694
21205°–215°1.19%1.11%0.05280.0501
22215°–225°1.11%1.19%0.05000.0527
23225°–235°2.80%2.78%0.10020.0997
24235°–245°1.97%1.73%0.07730.0702
25245°–255°0.15%0.35%0.00980.0196
26255°–265°1.39%1.31%0.05950.0568
27265°–275°9.56%9.22%0.22440.2197
28275°–285°2.38%4.55%0.08900.1405
29285°–295°3.18%2.72%0.10970.0981
30295°–305°0.92%1.02%0.04320.0469
31305°–315°1.98%1.93%0.07760.0762
32315°–325°1.27%1.21%0.05550.0535
33325°–335°1.90%2.10%0.07530.0811
34335°–345°2.06%1.90%0.08000.0753
35345°–355°2.57%2.32%0.09410.0873
Sum = H3.2143.265

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.