Sunjae Lee 李 善載

Measuring urban shrinkage beyond vacancy counts

Sunjae Lee

An invited SNU seminar on measuring urban shrinkage through parcel-level lifecycles, spatial patterns, and the limits of vacancy-centered indicators.

Spatial analysis of urban shrinkage

Sunjae Lee, Dongjoon Park & Bumjoon Kang

A scoping review of fine-scale urban shrinkage studies, identifying gaps in geography, scale, measurement, and spatial analysis methods.

AI-driven FAR missing data imputation

Dongjoon Park, Sunjae Lee & Bumjoon Kang

An RF-INLA imputation model for estimating missing floor area ratio values in South Korea's building registry using parcel-level context.

Enhancing Building Data Quality Using Artificial Intelligence

Euisoon Ahn, Sunjae Lee et al.

Examines Building ID assignment and links building registers with permit records to assess matching quality and consistency across administrative datasets.

Uncovering round-trip patterns in bicycle sharing

Sunjae Lee, Hyunwoo Lee & Sohyun Park

Differences in short-distance travel across home-, work-, and river-based neighborhoods in Seoul's public bike-sharing system.

Measuring urban spatial change with parcel-building data

Sunjae Lee

A parcel-level framework linking cadastral and building registry data to measure nationwide urban spatial change over time.

Measuring bicycle daily activity spaces in Seoul

Sunjae Lee & Sohyun Park

An empirical analysis of Seoul's bicycle daily activity spaces using Ddareungi round-trip trajectories and station-level usage patterns.

Net zero smart mobility and Seoul bike-sharing road segments

Sunjae Lee

An invited UDIK talk on interpreting Seoul road-segment characteristics through public bicycle trajectory data and usage indicators.

Built environment factors in older adults' bike-sharing

Jinhyun Hong, Sunjae Lee et al.

A spatial analysis of how built environment factors shaped older adults' Ddareungi use before and during the COVID-19 pandemic.

Elderly walking and neighborhood facility use

Hyungjoo Yim, Sunjae Lee & Sohyun Park

An empirical study of how older residents use neighborhood facilities through walking, purchasing, non-purchasing, and multi-destination trips.

Preschoolers' social relationships in Seoul neighborhoods

Da Un Yoo, Sunjae Lee et al.

A survey-based study of how preschoolers' neighborhood social relationships relate to everyday meeting places, pedestrian environment, and safety.

Bike-sharing station POI distribution in Seoul

Sunjae Lee & Sohyun Park

A CELA 2023 presentation on measuring POI areas around Seoul bike-sharing stations to understand short-distance bicycle use patterns.

Park walking differences from Seoul mHealth data

Youngjun Park, Sunjae Lee & Sohyun Park

An mHealth/GPS analysis comparing park walking among physically inactive and active groups in Seoul, identifying differences in steps, duration, cadence, and well-walked parks.

Child-friendly city indicators for children's spatial welfare

Da Un Yoo, Sunjae Lee & So-Hyun Park

A comparative study of child-friendly city indicator systems, identifying how Korea can better reflect children's physical-spatial environment and spatial welfare.

Excellent Paper Award for accessible tourism research

Sunjae Lee et al.

Recognized for developing an accessible tourism score that evaluates mobility, convenience, leisure quality, and attractiveness in urban built environments.

Accessible tourism score for mobility-limited travelers

Sunjae Lee et al.

A GIS-based accessible tourism score for Seoul that combines mobility, convenience, leisure quality, and attractiveness indicators for mobility-limited travelers.

Neighborhood sustainability for preschool children

Da-Un Yoo & Sunjae Lee

A proximity-based measure for evaluating preschool children's access to childcare, play, healthcare, cultural, and welfare amenities in Seoul.

Mobile big data for walking-behavior research

Hyunju Kim, So-Hyun Park & Sunjae Lee

A methodological review of walking-behavior measurement, evaluating how GPS devices and mobile big data can improve empirical walkability research.

Elderly street use by companions and walking speed

Jinah Huh, Sunjae Lee & So-Hyun Park

A smartphone GPS and travel-diary study interpreting how older adults use residential street environments differently when walking alone or with companions.

Elderly walking patterns near Seoul metro stations

Sunjae Lee & So-Hyun Park

A smartphone GPS study of elderly walking around Seoul metro-station areas, distinguishing visiting and living areas through WalkOn movement data.

Excellence Award for master's thesis

Sunjae Lee

Received an Excellence Award from the Architectural Institute of Korea for a master's thesis on elderly walking patterns near metro stations.

Best Presentation Award at AIK Autumn Conference

Sunjae Lee & Sohyun Park

Received the Best Presentation Award for a conference presentation on elderly walking patterns, public facility use, and planning standards based on WalkOn app big data in Seoul.

Auditable review of vacant-housing grades with street-view AI

Sunjae Lee et al.

OD mobility diagnosis of Seoul and Tokyo functional stress

Sunjae Lee, Bumjoon Kang & Yuya Shibuya

Two-stage diagnostic of Seoul urban cycling

Sunjae Lee & Sohyun Park

Long-term post-demolition vacancy and land reuse

Sunjae Lee, Minju Shin & Bumjoon Kang

Beyond vacancy counts in South Korean urban shrinkage

Sunjae Lee & Bumjoon Kang