# knaaptime

> Urban social science and spatial data science


## Papers
- [Exploring Space‐Time Interactions in Fatal Opioid Overdoses](https://knaaptime.com/papers/opioids_knox/):  - Published 2025-07-19
- [The emergence of fentanyl in a stimulant landscape: Un/intentional use, social relations, and developing communities of care](https://knaaptime.com/papers/stimulants/):  - Published 2025-04-01
- [Unraveling Incommensurate Spatial Partitions: A Bipartite Graph Approach to School-Neighborhood Interactions and Their Impacts](https://knaaptime.com/papers/bipartite/):  - Published 2024-11-05
- [Measuring Spatial Congruence in the School-Neighborhood Nexus](https://knaaptime.com/papers/congruence/):  - Published 2024-09-01
- [The Geospatial Neighborhood Analysis Package: Open Tools for Urban, Regional, and Neighborhood Science](https://knaaptime.com/papers/geosnap/):  - Published 2024-08-01
- [Measuring the Purple Line's Effect on Residential Rents: Spatial Econometrics and Causal Inference in Urban Policy Analysis](https://knaaptime.com/papers/rentpanel/):  - Published 2024-02-01
- [Measuring Two Decades of Urban Spatial Structure: The Evolution of Agglomeration Economies in American Metros](https://knaaptime.com/papers/getis/):  - Published 2024-01-01
- [American Community Survey (ACS) Data Uncertainty and the Analysis of Segregation Dynamics](https://knaaptime.com/papers/acs_uncertainty/):  - Published 2023-01-01
- [Reducing Racial Segregation of Public School Districts](https://knaaptime.com/papers/school_segregation/):  - Published 2023-01-01
- [Segregated by Design? Street Network Topology and the Measurement of Urban Segregation](https://knaaptime.com/papers/seg_networks/):  - Published 2023-01-01
- [The Legacy of Redlining: A Spatial Dynamics Perspective](https://knaaptime.com/papers/legacy_redlining/):  - Published 2022-01-01
- [The Spatial Analysis of Gentrification: Formalizing Geography in Models of a Multidimensional Urban Process](https://knaaptime.com/papers/spatial_gentrification/):  - Published 2022-01-01
- [Capturing the Relationship Between Spatial Structure and Individual Outcomes: Variation in the Concept of 'Access to Parks' and its Association with BMI](https://knaaptime.com/papers/catshoods/):  - Published 2021-01-01
- [Changes in the Economic Status of Neighbourhoods in US Metropolitan Areas from 1980 to 2010: Stability, Growth and Polarisation](https://knaaptime.com/papers/neighborhood_econ_status/):  - Published 2021-01-01
- [Smart Growth’s Misbegotten Legacy: Gentrification](https://knaaptime.com/papers/gentrification_smart_growth/):  - Published 2021-01-01
- [The Daily Ballet of Temporary Integration: Spatio-Temporal Segregation Dynamics in Metropolitan U.S.A.](https://knaaptime.com/papers/segregation_dynamics/):  - Published 2021-01-01
- [The PySAL Ecosystem: Philosophy and Implementation](https://knaaptime.com/papers/pysal/):  - Published 2021-01-01
- [A Visual Analytics System for Space-Time Dynamics of Regional Income Distributions Utilizing Animated Flow Maps and Rank-based Markov Chains](https://knaaptime.com/papers/visual_analytics/):  - Published 2020-01-01
- [An open-source framework for non-Spatial and Spatial segregation measures: the PySAL segregation module](https://knaaptime.com/papers/segregation_module/):  - Published 2020-01-01
- [Comparative Segregation Analytics](https://knaaptime.com/papers/comparative_seg/):  - Published 2020-01-01
- [Efficient Regionalization for Spatially-Explicit Neighborhood Delineation](https://knaaptime.com/papers/efficient_regionalization/):  - Published 2020-01-01
- [Geosilhouettes: geographical measures of cluster fit](https://knaaptime.com/papers/geosilhouettes/):  - Published 2020-01-01
- [Learning Geographical Manifolds: A Kernel Trick for Geographical Machine Learning](https://knaaptime.com/papers/manifolds/):  - Published 2020-01-01
- [Machines Learn The Chicago School: Modeling Multidimensional Neighborhood Change as a Spatial Markov Process](https://knaaptime.com/papers/machines/):  - Published 2020-01-01
- [Neighborhood change in the United States - a comparison of sequence analysis methods](https://knaaptime.com/papers/neighborhood_sequences/):  - Published 2020-01-01
- [The Dynamics of Urban Neighborhoods: A Survey of Approaches for Modeling Socio-Spatial Structure](https://knaaptime.com/papers/dynamics_neighborhoods/):  - Published 2020-01-01
- [Urban Income Mobility Patterns in the United States: 1980-2010](https://knaaptime.com/papers/income_mobility/):  - Published 2020-01-01
- [Adaptive Choropleth Mapper: An Open-Source Web-Based Tool for Synchronous Exploration of Multiple Variables at Multiple Spatial Extents](https://knaaptime.com/papers/acm/):  - Published 2019-01-01
- [CATSLife: A Study of Lifespan Behavioral Development and Cognitive Functioning](https://knaaptime.com/papers/catslife/):  - Published 2019-01-01
- [How Do Cities Flow in an Emergency? Tracing Human Mobility Patterns during a Natural Disaster with Big Data and Geospatial Data Science](https://knaaptime.com/papers/hurricanes/):  - Published 2019-01-01
- [Metropolitan planning in a vacuum: Lessons on regional equity planning from Baltimore’s Sustainable Communities Initiative](https://knaaptime.com/papers/metro_in_vacuum/):  - Published 2019-01-01
- [Opportunity for Whom? The Diverse Definitions of Neighborhood Opportunity in Baltimore](https://knaaptime.com/papers/opp_for_whom/):  - Published 2018-01-01
- [Spatio-temporal analysis of socioeconomic neighborhoods: The Open Source Longitudinal Neighborhood Analysis Package (OSLNAP)](https://knaaptime.com/papers/oslnap/):  - Published 2018-01-01
- [The Cartography of Opportunity: Spatial Data Science for Equitable Urban Policy](https://knaaptime.com/papers/cartography_of_opp/):  - Published 2017-01-01
- [Housing Assistance in Black and White: A Discrete Choice Model of Residential Sorting in Housing Voucher Programs](https://knaaptime.com/papers/housing_black_white/):  - Published 2016-01-01
- [Who Moves to Opportunity? Spatial Returns to Housing Assistance and the Effect of Specialized Mobility Programs](https://knaaptime.com/papers/who_moves/):  - Published 2016-01-01
- [Polycentrism as a Sustainable Development Strategy: An Empirical Analysis from the State of Maryland](https://knaaptime.com/papers/polycentrism/):  - Published 2015-01-01
- [A tool for measuring and visualizing connectivity of transit stop, route and transfer center in a multimodal transportation network](https://knaaptime.com/papers/connectivity/):  - Published 2014-01-01
- [Driving to Opportunity: Understanding the Links among Transportation Access, Residential Outcomes, and Economic Opportunity for Housing Voucher Recipients](https://knaaptime.com/papers/driving_to_opp/):  - Published 2014-01-01

## Posts
- [Visualizing Flows with libpysal and lonboard](https://knaaptime.com/posts/longraph/): You are looking for this page. I need to redo my website - Published 2024-07-25
- [Urban Simulation: Models, Modells, and Twins](https://knaaptime.com/posts/urbansim/): You are looking for this page . I need to redo my website - Published 2024-07-02
- [PySAL Turns 2.2](https://knaaptime.com/posts/pysal22/): tl; dr: We released PySAL 2.2 into the wild with a brand new (but backwards compatible) structure … - Published 2020-02-13
- [Measuring Urban Segregation with Spatial Computation](https://knaaptime.com/posts/segregation_dynamics/): A brief tour of segregation dynamics in American cities, by way of PySAL’s new(ish) … - Published 2019-06-01
- [Neighborhood Opportunity Types in R](https://knaaptime.com/posts/opportunity-types-in-r/): 5/31/2017 Neighborhood Opportunity, Spatial Data Science, and Equitable Urban PolicyThis notebook … - Published 2015-05-01
- [Sandtown and Spatial Mismatch](https://knaaptime.com/posts/spatial-mismatch/): For the past few days I’ve been having a lively twitter debate with my friend and colleague … - Published 2015-04-01
- [Assisted Housing & Spatial Opportunity](https://knaaptime.com/posts/assisted-housing-and-spatial-opportunity/): A few weeks ago I gave an interview for a Baltimore Sun article, published yesterday, about … - Published 2015-03-01
- [MD Accessibility Maps](https://knaaptime.com/posts/md-accessibility-maps/): Walk Access The Walk Accessibility map gives an accessibility score to each census tract in the … - Published 2014-01-01

## Projects
- [Urban Analysis and Spatial Science](https://knaaptime.com/projects/urban_analysis/): Theory, Methods, and Code for Applied Research in Spatial Social Science. Spanning the fields of …
- [An Open-Source Ecosystem for Spatial and Urban Data Science](https://knaaptime.com/projects/pose/): This project aims to establish the long term viability and dynamism of an open source ecosystem for …
- [geosnap4ed: Neighborhood Analysis in Education Research](https://knaaptime.com/projects/gates/): geosnap4ed is designed to develop new methods for neighborhood analysis and build analytical …
- [Addressing Opioid Overdose Disparities in Inland Southern California: Ethnography Meets Advanced Spatial Analytics](https://knaaptime.com/projects/opioids/): Drawing from spatial data science, anthropology and public health, this project seeks new insight …
- [Neighborhood Influences Over the Life Course: Families, Twins, and Spatial Contexts](https://knaaptime.com/projects/twins/): The Colorado Adoption and Twin Study of Lifespan behavioral development (CATSLife) began over 30 …
- [Scalable Segregation Analytics](https://knaaptime.com/projects/segregation/): This project develops new methods for the treatment of uncertainty in the American Community Survey …
- [Modeling Neighborhood Space-Time Dynamics](https://knaaptime.com/projects/neighborhood_dynamics/): This project will produce new methods for neighborhood identification and analysis that draw on …
- [Spatial Inequality Dynamics](https://knaaptime.com/projects/inequality_dynamics/): This research project develops new analytical methods for the study of spatial dynamics of income …
- [Modeling The Geography of Opportunity for Fair Housing Policy](https://knaaptime.com/projects/geog_opportunity/): The geography of opportunity is a well-known phrase used to describe the ways that neighborhoods …
- [Employment Centers & Accessibility: Polycentric Agglomeration as an Economic Development Strategy](https://knaaptime.com/projects/emp_centers/): This project focused on identifying (ultimately 23) economic centers in the Baltimore-Washington …
- [Differences in Locational Attainment in Baltimore's Affordable Housing Programs](https://knaaptime.com/projects/bhmp/): My dissertation used address-level data on housing voucher holders in Baltimore to examine the …
- [Moving to Opportunity And Back: Neighborhood Attainment in the MTO Program](https://knaaptime.com/projects/mto/): The Federal “Moving to Opportunity for Fair Housing Demonstration” is one of the most …
- [The Baltimore Regional Plan For Sustainable Development (RPSD)](https://knaaptime.com/projects/rpsd/): 

## Software
- [PySAL: The Python Spatial Analysis Library](https://knaaptime.com/software/pysal_package/): PySAL, the Python spatial analysis library, is an open source cross-platform library for geospatial …
- [geosnap : The Geospatial Neighborhood Analysis Package](https://knaaptime.com/software/geosnap/): geosnap is a python package for exploring, modeling, analyzing, and visualizing the social and …
- [PySAL: segregation](https://knaaptime.com/software/pysal_segregation/): The PySAL segregation package provides state-of-the-art tools for quantitative segregation analysis. …
- [PySAL: tobler ](https://knaaptime.com/software/tobler/): The PySAL tobler package provides functionality for areal interpolation and dasymetric mapping. It …
- [Exploring Trends in Income Segregation with ACS Data](https://knaaptime.com/software/incseg_app/): This example dashboard shows how to wrap an interface around engines like geosnap and the PySAL …
- [mandown: Reproducible Research and Scholarly Manuscripts in Markdown](https://knaaptime.com/software/mandown/): Fully open and reproducible science requires a technical writing structure , but LaTeX is too clumsy …
- [PySAL: spopt -- Spatial Optimization, Regionalization, & Routing](https://knaaptime.com/software/spopt/): The PySAL spopt package is an open-source Python library for solving optimization problems with …
- [The Purple Line Corridor Coalition Data Dashboard](https://knaaptime.com/software/plcc/): During my time at the National Center for Smart Growth at UMD, I designed and implemented the first …


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Generated on 2026-04-02 20:06:52 UTC
Site: https://knaaptime.com/