Section: Social Complexity

Subsection: Transport infrastructure

Bridge

Talking about transport infrastructure, bridges refers to bridges built and/or maintained by the polity (that is, code 'present' even if the polity did not build a bridge, but devotes resources to maintaining it). (See here)

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Metadata:

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Variable	Definition
Polity	The Seshat Polity ID
Year(s)	The years for which we have the data. [negative = BCE]
Tag	[Evidenced, Disputed, Suspected, Inferred, Unknown]
Verified	A Seshat Expert has approved this piece of data.

Variable	Definition
bridge	The absence or presence of bridge for a polity.

Actual Data:

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#	Polity	Year(s)	Bridge	Description	Edit
141	(Kachi Plain - Post-Urban Period)	Full Year Range of Kachi Plain - Post-Urban Period is assumed. [-1800, -1300]	present	None
142	(Kachi Plain - Pre-Urban Period)	Full Year Range of Kachi Plain - Pre-Urban Period is assumed. [-3200, -2500]	unknown	None
143	(Kachi Plain - Urban Period I)	Full Year Range of Kachi Plain - Urban Period I is assumed. [-2500, -2100]	unknown	None
144	(Kachi Plain - Urban Period II)	Full Year Range of Kachi Plain - Urban Period II is assumed. [-2100, 1800]	unknown	None
145	(Sarazm)	Full Year Range of Sarazm is assumed. [-3500, -2000]	unknown	None
146	(Konya Plain - Early Chalcolithic)	Full Year Range of Konya Plain - Early Chalcolithic is assumed. [-6000, -5500]	absent	None
147	(Konya Plain - Late Chalcolithic)	Full Year Range of Konya Plain - Late Chalcolithic is assumed. [-5500, -3000]	absent	None
148	(East Roman Empire)	Full Year Range of East Roman Empire is assumed. [395, 631]	present	None
149	(Lysimachus Kingdom)	Full Year Range of Lysimachus Kingdom is assumed. [-323, -281]	present	None
150	(Kushan Empire)	Full Year Range of Kushan Empire is assumed. [35, 319]	unknown	None

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