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Kenneth Wong
Kenneth Wong

103 Followers

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Towards Data Science

·Pinned

Mapping Convenience Stores with Waffle Grids

What waffle grid map is, and compare it with stacked bar chart — TL;DR What is a waffle chart? What is a waffle chart on map? When should this type of map be used? This article serves as a gentle introduction to waffle chart and waffle grid map, using a dataset of convenience stores in Hong Kong. …

Cartography

9 min read

Mapping convenience stores with waffle grids
Mapping convenience stores with waffle grids
Cartography

9 min read


Published in

Towards Data Science

·Pinned

Commute pattern of 2.8 million workers in Hong Kong, visualised

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? …

Hong Kong

5 min read

Commute pattern of 2.8 million workers in Hong Kong, visualised
Commute pattern of 2.8 million workers in Hong Kong, visualised
Hong Kong

5 min read


Pinned

到底7–11密過OK幾多?

總有一間喺左近 我搵唔返(歡迎讀做「我唔想做literature review」)呢句slogan嘅出處,但佢都証明咗香港嘅7–11開到成行成市。 咁到底7仔開得有幾密?呢個係第一個問題。 同樣係便利店,全香港有接近成千間7–11,但OK就只係得300幾間,足足差成700間。咁就帶出第二個問題:會唔會有某啲地方係OK多過7–11?(劇透:有)。如果有嘅話,咁OK會多過佢幾多間?(劇透:3間左右) 數據來源 兩間集團嘅官網都有每間便利店分店嘅位置,所以只要做少少data scraping就可以砌到一個便利店dataset。Data scraping嘅話,Python人就用Beautiful Soup;我寫開R,所以用rvest。 免責聲明:set data 1. 無validate過;2. 唔係最新version;3. 可能visualise嗰陣copy漏咗幾行。有錯有漏唔係意外,係我懶。 地圖

Convenience Store

6 min read

到底7–11密過OK幾多?
到底7–11密過OK幾多?
Convenience Store

6 min read


Apr 16

The importance of timing: How departure time affects your urban accessibility and journey time

Reachable area (aka isochrone), but for public transit, at different times of the day — TL;DR Reachable area by public transit, temporally How far could you reach within 45-min public transit when departing at different times of the day? This blog dissects this accessibility question by: Discuss the general idea of reachable areas (or isochrones), which represent how far you can travel within a specific time…

Cartography

11 min read

The importance of timing: How departure time affects your urban accessibility and journey time
The importance of timing: How departure time affects your urban accessibility and journey time
Cartography

11 min read


Jan 16

看見數據:英國 2011 年至 2021 年十年間香港人口分佈比較

暨淺談地圖製作 — 友人 Justin 整合了英國人口普查數據,計算出每個市政區域 2021 年比起 2011 年之香港人口變化(下稱原始版本地圖)。

Hong Kong

6 min read

看見數據:英國 2011 年至 2021 年十年間香港人口分佈比較
看見數據:英國 2011 年至 2021 年十年間香港人口分佈比較
Hong Kong

6 min read


Jul 25, 2022

看見數據:2012 至 2022 年香港雨量記錄及暴雨警告信號史

水浸都係黃雨? — 夏天,為大地帶來雨水,亦帶來暴雨警告信號,更加帶來種種同惡劣天氣有關嘅 meme。

Data Visualisation

2 min read

看見數據:2012 至 2022 年香港雨量記錄及暴雨警告信號史
看見數據:2012 至 2022 年香港雨量記錄及暴雨警告信號史
Data Visualisation

2 min read


Jul 2, 2022

Introducing — Historical Territorial Outline Zoning Plan (OZP) Database (Beta)

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…

Spatial Data Analysis

7 min read

Introducing — Historical Territorial Outline Zoning Plan (OZP) Database (Beta)
Introducing — Historical Territorial Outline Zoning Plan (OZP) Database (Beta)
Spatial Data Analysis

7 min read


Jun 17, 2022

香港新市鎮車路/行人路方向分佈:由道路方向探索新市鎮規劃

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 …

Urban Analytics

12 min read

香港新市鎮車路/行人路方向分佈:由道路方向探索新市鎮規劃
香港新市鎮車路/行人路方向分佈:由道路方向探索新市鎮規劃
Urban Analytics

12 min read


May 11, 2022

Replicating “Zoom to selected features” function in ArcGIS / QGIS with R shiny

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”…

R

7 min read

Replicating “Zoom to selected features” function in ArcGIS / QGIS with R shiny
Replicating “Zoom to selected features” function in ArcGIS / QGIS with R shiny
R

7 min read


Apr 2, 2022

「另外嗰個」

香港主要重覆地名地圖 — 邊個銅鑼灣? 我住銅鑼灣,不過係「另外嗰個」銅鑼灣。 地方理論上係無限,而地名亦都理論上係無限。但前人去嘅範圍有限,而聯想到嘅地名亦都有限。人會撞名,地方都會。香港作為彈丸之地,亦都有為數不少嘅重覆地名。 重覆地名入面,通常都會有一個多人熟悉嘅地方,而另一個係較少人認識。港島北有銅鑼灣,而沙田亦都有一個銅鑼灣。同人講喺銅鑼灣會合,正常理解都會係指港島北嗰個銅鑼灣。 另一個比較出名嘅「另外嗰個」要數西貢海下灣嘅灣仔。你同人講去咗灣仔買電腦,正常人都會理解到你講緊港島北嗰個灣仔;而你同人講去咗灣仔露營嘅話,行山友都會理解到你講緊西貢嗰個灣仔(如果你喺港島北嗰個灣仔搵到地方露營嘅話,可以話俾大家知)。 香港重覆地名 除咗上面提及嘅兩個重覆地名之外,香港仲有邊啲重覆地名? 下圖揀咗 13 個香港重覆地名,標注咗「另外嗰個」嘅位置。

Hong Kong

3 min read

「另外嗰個」
「另外嗰個」
Hong Kong

3 min read

Kenneth Wong

Kenneth Wong

103 Followers

Urban Data Science Enthusiast | Urban Planning | GIS | Maps | Data Visualisation | mappyurbanist.com

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