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computer science

HKmap.live

HKmap.live is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand HKmap.live rather than just read about it. In short: HKmap.live is a web mapping service which crowdsources and tracks the location of protesters and police in Hong Kong. The service was launched during the 2019–2020 Hong Kong protests and gathers reports on police patrols and tear gas deployments via Telegram.

HKmap.live — main illustration
HKmap.live — illustration

Key takeaways

  • HKmap.live belongs to computer science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect HKmap.live to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of HKmap.live from memory before moving on to harder problems.

Reference excerpt

HKmap.live is a web mapping service which crowdsources and tracks the location of protesters and police in Hong Kong. The service was launched during the 2019–2020 Hong Kong protests and gathers reports on police patrols and tear gas deployments via Telegram. The service is available for smartphone users in an Android version via the Google Play Store and in a World Wide Web version, while the iOS smartphone version was removed by Apple.

Development and operation The service was launched in August 2019 by LIHKG member 5YH; according to the developer, the website had more than ten thousand unique visitors on the first day. It gathers reports from instant messaging service Telegram on police patrols and tear gas deployments. The service allows users to track police activity on Hong Kong streets, providing ongoing information on police movements via messages and GPS locations. This allows citizens to move away from areas where police action may take place, and notify others of actions that may be taken in different places. The service is available in an Android version via the Google Play Store and in a web version, while the iOS version was removed by Apple.

iOS app

Initial rejection and approval The iOS version of HKmap.live was initially submitted to Apple Inc. on 21 September 2019 and was rejected from its App Store five days later on an issue regarding payment options. The app's developer fixed the issue and re-submitted the application, though Apple again rejected the app on 2 October. According to the company, the rejection was because it "facilitates, enables, or encourages an activity that is not legal" and that it "allowed users to evade law enforcement". In response, the developer said that they believed the rejection was caused by a bureaucratic error rather than censorship, stating that the app was built to "show events happening" in Hong Kong and that they "do not encourage illegal activity". They also argued that the rejection was unfair because other apps such as Waze help drivers avoid traffic cameras and police, adding that Apple was assuming that HKmap.live users would break the law. Apple reversed its decision on 4 October and the app was made available on the App Store a day later.

Removal In an editorial published on 8 October, the People's Daily, the official mouthpiece of the Central Committee of the Chinese Communist Party, argued that Apple endorsed and protected "rioters" in the 2019–2020 Hong Kong protests by listing the app on its App Store. The article, which did not specifically name the app, suggested that Apple approving of the app after initial rejection made it an accomplice (Chinese: 帮凶) for the protesters, allowing "Hong Kong rioters to openly commit crime while openly escaping arrests". The article also criticised Apple for listing the protest anthem "Glory to Hong Kong", frequently sung in the protests, on its Hong Kong music store, though it did not directly name the song. Verna Yu of The Guardian described this condemnation as an attempt by China to force foreign companies to conform to its views, comparing it to a recent incident where state broadcaster China Central Television and Chinese companies cancelled collaboration with the National Basketball Association after Houston Rockets general manager Daryl Morey tweeted in support of the Hong Kong protests. Apple removed the app the next day. In its statement, Apple said that the app violated their guidelines and local laws, stating that it "has been used to target and ambush police" and "threaten public safety" according to information provided by the Cyber Security and Technology Crime Bureau (CSTCB), part of the Hong Kong Police Force. Jack Nicas of The New York Times noted that like other companies, Apple had to balance between maintaining access to the Chinese market with the "negative public image of capitulating" to its government, though argued that Apple had more at stake in China than other multinational companies with most of its product assembly in China and its reliance on the Chinese market. The developer criticised Apple's decision on Thursday, saying on Twitter that it does not "solicit, promote, or encourage criminal activity." It also argued that there was no evidence to support the CSTCB's claim that the app has been used to target or ambush police, or that it threatened public safety. Users who had already downloaded the app can still use it after it was removed. Before it was removed, the iOS app was the most downloaded app under the Travel category in Apple's Hong Kong App Store.

Responses

… excerpt ends here. Continue reading the full article.

Illustrations

HKmap.live illustration
HKmap.live: Joint letter from U.S. Senators and Representatives to Apple regarding the removal
Joint letter from U.S. Senators and Representatives to Apple regarding the removal

Worked examples

Example 1 — a first encounter with HKmap.live

Start with the simplest possible case. Write down what HKmap.live claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to HKmap.live before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about HKmap.live ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of HKmap.live

In research
HKmap.live appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses HKmap.live in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
HKmap.live is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2019 establishments in Hong Kong, 2019–2020 Hong Kong protests, Android (operating system) software, so understanding it makes those chapters shorter.
In everyday life
Look for HKmap.live outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study HKmap.live in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what HKmap.live means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain HKmap.live out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is HKmap.live in simple terms?

HKmap.live is a web mapping service which crowdsources and tracks the location of protesters and police in Hong Kong. The service was launched during the 2019–2020 Hong Kong protests and gathers reports on police patrols and tear gas deployments via Telegram.

Why does HKmap.live matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study HKmap.live?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on HKmap.live.

Tags

  • 2019 establishments in Hong Kong
  • 2019–2020 Hong Kong protests
  • Android (operating system) software
  • IOS software
  • Internet properties established in 2019
  • Web mapping

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