Nationwide Hourly Population Estimating at the Neighborhood Scale in the United States Using Stable-Attendance Anchor Calibration

• URL: http://arxiv.org/abs/2602.12291v1
• Date: Sat, 31 Jan 2026 13:51:53 GMT
• Title: Nationwide Hourly Population Estimating at the Neighborhood Scale in the United States Using Stable-Attendance Anchor Calibration
• Abstract summary: Current population datasets are largely static and unable to capture the strong temporal dynamics of human presence driven by daily mobility.<n>Recent smartphone-based mobility data offer unprecedented penetration coverage, yet translating these opportunistic observations into accurate population estimates remains challenging.<n>We propose a Stable-Attendance Anchor (SAAC) framework to reconstruct hourly population presence at the block group level across the United States.
• Score: 4.17605349790235
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Traditional population datasets are largely static and therefore unable to capture the strong temporal dynamics of human presence driven by daily mobility. Recent smartphone-based mobility data offer unprecedented spatiotemporal coverage, yet translating these opportunistic observations into accurate population estimates remains challenging due to incomplete sensing, spatially heterogeneous device penetration, and unstable observation processes. We propose a Stable-Attendance Anchor Calibration (SAAC) framework to reconstruct hourly population presence at the Census block group level across the United States. SAAC formulates population estimation as a balance-based population accounting problem, combining residential population with time-varying inbound and outbound mobility inferred from device-event observations. To address observation bias and identifiability limitations, the framework leverages locations with highly regular attendance as calibration anchors, using high schools in this study. These anchors enable estimation of observation scaling factors that correct for under-recorded mobility events. By integrating anchor-based calibration with an explicit sampling model, SAAC enables consistent conversion from observed device events to population presence at fine temporal resolution. The inferred population patterns are consistent with established empirical findings in prior mobility and urban population studies. SAAC provides a generalizable framework for transforming large-scale, biased digital trace data into interpretable dynamic population products, with implications for urban science, public health, and human mobility research. The hourly population estimates can be accessed at: https://gladcolor.github.io/hourly_population.

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