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News from the Online Casino Malaysia challenge

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  18 months have passed since we told you on Online Casino Malaysia about the challenge launched by Tom Dwan, the 24-year-old online poker genius. We remind you of the rules and stakes of…
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Wednesday morning slot gacor…

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  I have good news to report too. I’m officially getting better at pool. 🙂 I’m now ranked a 3 instead of a 2 by the slot gacor. I’ve won my last two or three matches in…
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먹튀폴리스 먹튀검증games free

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  If you are looking to play 먹튀폴리스 먹튀검증games free, then you should always go with the online reviews which have posted by other players. Reviews can tell everything about the online…
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Bet Direct Slot Gacor WPT final approaches

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This year the World Slot Gacor Tour finals will take place at The Bellagio, Las Vegas. Bet Direct Poker players still have a chance to win their seat, but time is quickly running out.…
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Third Day’s Play at the situs judi online Tournament

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  The third day’s play at the situs judi online began with 72 participants. Each player was assured of a minimum of $7,500 in prize money. Many top ranking players remained in the…
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Higher Stakes = Better Results?

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Since my last post, I’ve played a total of two tournaments at Online Casino Malaysia, and none anywhere else. The two that I played were tournaments that I wouldn’t have played in last week…
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Top 5 strangest places on Earth

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  The Great Blue Hole The Great Blue Hole is a large submarine sinkhole off the coast of Belize on the Caribbean Sea. Its diameter is 300 m and its depth is more than 120 m. Its unique…
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Sarah Palin to Guest Host Today Show

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Former political figure Sarah Palin has signed up to co-host the Today show this week for some reason, NBC reports. She will do the honors tomorrow (Tuesday).According to a message posted on…
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How to Enjoy winning369 Online Easily

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  • August 12, 2022
  How you can play poker online is one of challenging game among all the particular games that exist upon the IDNPLAY server. This kind of is because of just how to learn using various…
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Omens… sbo Lots of ‘Em… All Bad

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  • July 14, 2022
  Where did I go wrong? I suppose it started with my overly arrogant “How to Win at Craps” post. I forgot rule number one about casino gambling. It doesn’t matter what…
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About Us

About

Crowdflow started in April 2011 after it was revealed that iPhones collect and store their location data. We have since collected and analyzed the log files of almost 1.500 iPhones and iPads and created an open database of wifi and cell networks. We also visualized how these networks are distributed all over the world.

How Crowdflow started

After the tracking and collection of location data was revealed, Michael Kreil used the data stored in his iPhone and created the first heatmap. He then created a second heatmap with the information from the consolidated.db-files Bastian Greshake published. The next idea was to combine and analyze the data. A comparison between the time and location stamps revealed that Kreil and Greshake had almost met each other twice during the 10 months of recording. Obviously, log files from the iPhones could reveal a lot more than just location data, once several sets were taken into account. The only question was: just how much?

So on a sunday evening in April the idea of Crowdflow was born. On monday the blog was set up, a java application and the upload form prgrammed. After everything was uploaded onto the server, Crowdflow went online on tuesday – after just two days. Within the first 24 hours six sets of log files were donated. Over the next days the number went up, due to several media outlets and blogs who reported about the project.

On the 4th of May Apple released the iOS Update 4.3.3 that prevents the backup of log files to the hard drive. By mid-May (presumably when the last iPhones were updated), donations wound down. Since then the Crowdlow moved to a smaller server and data upload has been disabled. Almost 1.500 sets of log files had been collected.

How Crowdflow works

Owners of iPhones were asked to anonymously donate their location data. In order to do so they could download a java applet to extract the log files from the iTunes backup into one database. The database could then be uploaded to the crowdflow server. All the donated databases were combined, sanitized and analyzed. The name crowdflow refers to the use of crowdsourcing.

From the log files, we created an open database of known wifi and cell networks (which, in turn, are not necessarily open). We also visualized where the networks are located all over the world. But the possibilities don’t stop there: We have also visualized how iPhones scan for wifi and cell networks, as well as the downloading of new maps when traveling.

Even though no more log files can be donated, we still continue to explore the data and look for new insights.

Crowdflow in the news

Crowdflow has been featured on engadget, GigaOM and tuaw. Read an interview with Michael Kreil on Deutsche Welle.

Frequently asked questions

Will you give me your raw data?

No, you can only get the data released on this site.

Can I still contribute?

Unfortunately not. Since the release of iOS 4.3.3 in May 2011 the log files are no longer backed up to iTunes and the cache size has been reduced to a few weeks instead of months.

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News from the Online Casino Malaysia challenge

  • admin
  • January 21, 2023
  18 months have passed since we told you on Online Casino Malaysia about the challenge launched by Tom Dwan, the 24-year-old online poker genius. We remind you of the rules and stakes of…
View Post
Share
  • Small Business

Wednesday morning slot gacor…

  • admin
  • January 18, 2023
  I have good news to report too. I’m officially getting better at pool. 🙂 I’m now ranked a 3 instead of a 2 by the slot gacor. I’ve won my last two or three matches in…
View Post
Share
  • Small Business

먹튀폴리스 먹튀검증games free

  • admin
  • October 28, 2022
  If you are looking to play 먹튀폴리스 먹튀검증games free, then you should always go with the online reviews which have posted by other players. Reviews can tell everything about the online…
View Post
Share
  • game

Bet Direct Slot Gacor WPT final approaches

  • admin
  • October 6, 2022
This year the World Slot Gacor Tour finals will take place at The Bellagio, Las Vegas. Bet Direct Poker players still have a chance to win their seat, but time is quickly running out.…
View Post
Share
  • Small Business

Third Day’s Play at the situs judi online Tournament

  • admin
  • September 28, 2022
  The third day’s play at the situs judi online began with 72 participants. Each player was assured of a minimum of $7,500 in prize money. Many top ranking players remained in the…
View Post
Share
  • Small Business

Higher Stakes = Better Results?

  • admin
  • September 27, 2022
Since my last post, I’ve played a total of two tournaments at Online Casino Malaysia, and none anywhere else. The two that I played were tournaments that I wouldn’t have played in last week…
View Post
Share
  • Small Business

Top 5 strangest places on Earth

  • admin
  • September 14, 2022
  The Great Blue Hole The Great Blue Hole is a large submarine sinkhole off the coast of Belize on the Caribbean Sea. Its diameter is 300 m and its depth is more than 120 m. Its unique…
View Post
Share
  • Business

Sarah Palin to Guest Host Today Show

  • admin
  • September 13, 2022
Former political figure Sarah Palin has signed up to co-host the Today show this week for some reason, NBC reports. She will do the honors tomorrow (Tuesday).According to a message posted on…
View Post
Share
  • game

How to Enjoy winning369 Online Easily

  • admin
  • August 12, 2022
  How you can play poker online is one of challenging game among all the particular games that exist upon the IDNPLAY server. This kind of is because of just how to learn using various…
View Post
Share
  • game

Omens… sbo Lots of ‘Em… All Bad

  • admin
  • July 14, 2022
  Where did I go wrong? I suppose it started with my overly arrogant “How to Win at Craps” post. I forgot rule number one about casino gambling. It doesn’t matter what…
View Post
Share
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