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Some online applications that allow the user to zoom into an area often include locator maps to assist in navigating the main map or image. For example, Google Maps uses a locator map to orient visitors to its site, included as a toggle button. These locators often feature a movable box that assists the user with navigating the main map.
Google Map Maker was a map editing service launched by Google in June 2008. [2] In geographies where it is hard to find providers of good map data, user contributions were used to increase map quality.
OpenStreetMap (abbreviated OSM) is a free, open geographic database updated and maintained by a community of volunteers via open collaboration.Contributors collect data from surveys, trace from aerial photo imagery or satellite imagery, and also import from other freely licensed geodata sources.
The most common purpose of a thematic map is to portray the geographic distribution of one or more phenomena. Sometimes this distribution is already familiar to the cartographer, who wants to communicate it to an audience, while at other times the map is created to discover previously unknown patterns (as a form of Geovisualization). [17]
Google responded by agreeing to respect privacy laws in Canada and other countries. [13] Ultimately, Google agreed to blur faces and license plates that appeared in images taken. Google has since done the same in other countries, including the United States, regardless of whether or not it is legally compelled to do so. [14]
MapReduce is a programming model and an associated implementation for processing and generating big data sets with a parallel, distributed algorithm on a cluster. [1] [2] [3]A MapReduce program is composed of a map procedure, which performs filtering and sorting (such as sorting students by first name into queues, one queue for each name), and a reduce method, which performs a summary ...
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