Concepts inRecommending friends and locations based on individual location history

Collaborative filtering

Collaborative filtering (CF) is a technique used by some recommender systems. Collaborative filtering has two senses, a narrow one and a more general one. In general, collaborative filtering is the process of filtering for information or patterns using techniques involving collaboration among multiple agents, viewpoints, data sources, etc. Applications of collaborative filtering typically involve very large data sets.  more from Wikipedia

Recommender system

Recommender systems or recommendation systems (sometimes replacing "system" with a synonym such as platform or engine) are a subclass of information filtering system that seek to predict the 'rating' or 'preference' that a user would give to an item or social element they had not yet considered, using a model built from the characteristics of an item (content-based approaches) or the user's social environment (collaborative filtering approaches).  more from Wikipedia

Cosine similarity

Cosine similarity is a measure of similarity between two vectors by measuring the cosine of the angle between them. The cosine of 0 is 1, and less than 1 for any other angle; the lowest value of the cosine is -1. The cosine of the angle between two vectors thus determines whether two vectors are pointing in roughly the same direction. This is often used to compare documents in text mining. In addition, it is used to measure cohesion within clusters in the field of data mining.  more from Wikipedia

Global Positioning System

The Global Positioning System (GPS) is a space-based satellite navigation system that provides location and time information in all weather, anywhere on or near the Earth, where there is an unobstructed line of sight to four or more GPS satellites. It is maintained by the United States government and is freely accessible to anyone with a GPS receiver. The GPS program provides critical capabilities to military, civil and commercial users around the world.  more from Wikipedia

Geographic information system

A geographic information system is a system designed to capture, store, manipulate, analyze, manage, and present all types of geographical data. The acronym GIS is sometimes used for geographical information science or geospatial information studies to refer to the academic discipline or career of working with geographic information systems. In the simplest terms, GIS is the merging of cartography, statistical analysis, and database technology.  more from Wikipedia

Individual

An individual is a person or a specific object. Individuality is the state or quality of being an individual; a person separate from other persons and possessing his or her own needs or goals. Being self expressive, independent. From the 15th century and earlier, and also today within the fields of statistics and metaphysics, individual meant "indivisible", typically describing any numerically singular thing, but sometimes meaning "a person. " (q.v. "The problem of proper names").  more from Wikipedia

Geospatial analysis

Geospatial analysis is an approach to applying statistical analysis and other informational techniques to geographically based data. Such analysis employs spatial software and analytical methods with terrestrial or geographic datasets, including geographic information systems and geomatics.  more from Wikipedia