マルエーフェリー株式会社

By: Sexy

On: October 31, 2025

Tagged: Action, Expose, Island, Map, Nature, Network, Ocean, Station, Street, Travel

東京航路:東京―(名古屋:下り便)―油津・志布志(南九州)―那覇
阪神航路:神戸―大阪―志布志―名瀬―那覇
北九州航路:北九州―那覇―(宮古島―石垣島　*業務提携会社「南西海運㈱」様の船舶にて輸送可能)
鹿児島航路:鹿児島―名瀬(奄美大島)―亀徳(徳之島)―和泊(沖永良部島)―与論―本部(もとぶ・沖縄県)―那覇
鹿児島航路:喜界―名瀬―古仁屋―平土野(知名運休中)

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Spider

Web crawler, sometimes called a spider or spiderbot and often shortened to crawler, is an Internet bot that systematically browses the World Wide Web and that is typically operated by search engines for the purpose of Web indexing (web spidering).

Web search engines and some other websites use Web crawling or spidering software to update their web content or indices of other sites' web content. Web crawlers copy pages for processing by a search engine, which indexes the downloaded pages so that users can search more efficiently.

Crawlers consume resources on visited systems and often visit sites unprompted. Issues of schedule, load, and "politeness" come into play when large collections of pages are accessed. Mechanisms exist for public sites not wishing to be crawled to make this known to the crawling agent. For example, including a robots.txt file can request bots to index only parts of a website, or nothing at all.

The number of Internet pages is extremely large; even the largest crawlers fall short of making a complete index. For this reason, search engines struggled to give relevant search results in the early years of the World Wide Web, before 2000. Today, relevant results are given almost instantly.

Crawlers can validate hyperlinks and HTML code. They can also be used for web scraping and data-driven programming.