What is data scraping?
Data scraping, in its most general form, refers to a technique in which a computer program extracts data from output generated from another program. Data scraping is commonly manifest in web scraping, the process of using an application to extract valuable information from a website.
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How Data Scraping Is Done
Web scraping is a fairly direct process when viewed at a high level. Code is utilized to pull information, generally via a scraper bot. The bot sends a request to the website, parses the HTML document and converts it into a different format.
Over time, the game has grown more sophisticated. As scraper bots become successful, content protection strategies are beefed up to thwart their efforts. In turn, the bots respond by developing tactics to outmaneuver these new protection mechanisms — and so it goes.
For the scrapers, content may be derived at little or no expense. Instead of having to write their own content, conduct research and obtain customer reviews, for example, the scrapers may post material on their sites. They avoid having to pay for certain reports and other documents.
Two Types of Data Scraping
Web Scraping
If you’ve ever copy and pasted information from a website, you’ve performed the same function as any web scraper, only on a microscopic, manual scale.
Web scraping, also known as web data extraction, is the process of retrieving or “scraping” data from a website. Unlike the mundane, mind-numbing process of manually extracting data, web scraping uses intelligent automation to retrieve hundreds, millions, or even billions of data points from the internet’s seemingly endless frontier.
Screen Scraping
Screen scraping is the act of copying information that shows on a digital display so it can be used for another purpose. Visual data can be collected as raw text from on-screen elements such as a text or images that appear on the desktop, in an application or on a website. Screen scraping can be performed automatically with a scraping program or manually with an individual extracting data.
How is web scraping stopped completely?
The only way to totally stop web scraping is to avoid putting content on a website entirely. However, using an advanced bot management solution can help websites eliminate access for scraper bots almost completely.
What is the difference between data scraping and data crawling?
Crawling refers to the process large search engines like Google undertake when they send their robot crawlers, such as Googlebot, out into the network to index Internet content. Scraping, on the other hand, is typically structured specifically to extract data from a particular website.
https://www.datamation.com/big-data/data-scraping/
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