What trends do the origin-destination matrix tell us about the supply of jobs in terms of location? — TL;DR There are more than 2.8 million workers with a fixed place of work in Hong Kong. What does the overall travel pattern from their home to the working place look like, when visualised? The location of the jobs and the living place of the workers are revealing the job-housing imbalance…

An open-access, cleaned, analysis-ready land use zoning database website for Hong Kong — I am proud to announce that one of my projects — Historical Territorial Outline Zoning Plan (OZP) Database — is now in beta release. The website is publicly available via the following link: http://ozpmerged.s3-website.ap-east-1.amazonaws.com/ This database website stores the publicly available digital OZP data from Town Planning Board (TPB). Statutory…

新市鎮行車道路／行人道路網絡異同之處 — TL;DR 行車道路可謂市鎮整體規劃基礎之一，而行人道路亦係市民有最多接觸市鎮建設。兩種道路網絡，雖有相同之處，但詳細佈局同設計又有所不同。本文揀選三個於不同年代發展之新市鎮，檢閱新市鎮車路以及行人路方向分佈異同之處，嘗試由另一角度剖析道路網絡同規劃。 前言：介乎車路、人行道與新市鎮規劃的詩意 政府規劃新區果陣，首先會劃出每個大地段（land parcel）嘅土地用途同埋車路網絡。土地同埋道路網絡相輔相 …

Step-by-step guide on recreating “Zoom to selected features” button in shiny, with leaflet and DT — TL;DR I tried to replicate the “Zoom to selected features” available in ArcGIS / QGIS in Shiny using {DT} and {leaflet}. This post records the steps required to create the button. The sample output is available on the Hong Kong Traffic Collision Database website ( https://hkdistricts-info.shinyapps.io/trafficcollisions-dev/), under the “pedestrian collision hotzones”…

What I thought about when crafting maps, as well as reviews after the challenge — TL;DR Same as last year, I joined the #30DayMapChallenge on Twitter again. Every day, tons of gorgeous maps leaves on the Twitter timeline, allowing me to brainstorm (aka copy) those neat cartography techniques, and incorporate some fun topics into my maps. Every challenge / competition / assignment / whatever should end…

由「道路街徑里」到城市發展史 — 按：本文為 2021 年 12 月明報星期日生活專欄 —— 城市諗：道路街徑里 — — 從街名後綴看街道規劃 —— 的另一版本。此版本主要著墨街名的空間形態（spatial pattern）以及空間數據分析（spatial data analysis），而專欄版著重上述分析對道路網絡及街道規劃有何啓示。簡而言之，Medium 版為技術文，專欄版為 …