# Webometrics: Some Critical Issues of WWW Size Estimation Methods

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## Abstract

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## 1. Introduction

## 2. Contributions to Webometrics Study

#### 2.1. On Webometrics

#### 2.2. Study of Overlap

#### 2.3. Graph Nature of the World Wide Web

#### 2.4. Diameter of the Web Graph

#### 2.5. Experiments on Closed Environment vs. the Web

## 3. Estimating the Size of the Indexed Web

#### 3.1. Search Engines and WWW Size Estimation

#### 3.2. Methods Surveyed

#### 3.2.1. Statistical Approach Using Web Page Sampling

#### 3.2.2. Updated Experiment Setting

#### 3.2.3. Size Estimation through Quadrat Sampling

#### 3.2.4. Size Estimation through Extrapolation

#### 3.3. Index Stability

## 4. Discussion and Conclusions

## Acknowledgments

## Author Contributions

## Conflicts of Interest

## Abbreviations

WWW | World Wide Web |

W3C | World Wide Web Consortium |

IETF | Internet Engineering Task Force |

AFRINIC | African Network Information Centre |

DMOZ | directory.mozilla.org |

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**Figure 2.**Connectivity of the web, as in [3].

**Figure 4.**Size of static web pages in 1997 as in [10].

**Figure 5.**Estimated index sizes of Google and Bing as in [2].

Website | Information Provided |
---|---|

WorldWideWebSize | Daily estimates on Google and Bing index sizes |

InternetLiveStats | Live update of variety of statistics on things connected to the internet |

InternetWorldStats | Provides statistics on the world internet usage |

Statista | Provides variety of statistics on the online and offline world of the consumer |

Alexa | Provides commercial web traffic data and analytics |

The Internet Map | Tries to display the web as a map |

httpArchive | Provides statistics on how the data is constructed and served on the internet |

Netcraft | Provides research data and analysis on many aspects of the internet |

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**MDPI and ACS Style**

Mohana Arunachalam, S.; Koumpis, A.; Handschuh, S. Webometrics: Some Critical Issues of WWW Size Estimation Methods. *Multimodal Technol. Interact.* **2018**, *2*, 12.
https://doi.org/10.3390/mti2020012

**AMA Style**

Mohana Arunachalam S, Koumpis A, Handschuh S. Webometrics: Some Critical Issues of WWW Size Estimation Methods. *Multimodal Technologies and Interaction*. 2018; 2(2):12.
https://doi.org/10.3390/mti2020012

**Chicago/Turabian Style**

Mohana Arunachalam, Srinivasan, Adamantios Koumpis, and Siegfried Handschuh. 2018. "Webometrics: Some Critical Issues of WWW Size Estimation Methods" *Multimodal Technologies and Interaction* 2, no. 2: 12.
https://doi.org/10.3390/mti2020012