Geosocial Networking is a type of social networking in which geographic services and capabilities such as geocoding and geotagging are used to enable additional social dynamics. User-submitted location data or geolocation techniques can allow social networks to connect and coordinate users with local people or events that match their interests. Geolocation on web-based social network services can be IP-based or use hotspot trilateration. For mobile social networks, texted location information or mobile phone tracking can enable location-based services to enrich social networking.
The evolution of geosocial can be traced back to the implication of social application programming interfaces by internet-based corporations in the early 2000s. EBay uses one of the oldest, announcing its social API at the end of 2000 and allowing free access to over 21,000 developers in late 2005. Amazon's primary API was released in 2002, which allowed developers to pull consumer information like product reviews into third-party applications. Google, Inc. began testing an API in April 2002 and currently owns dozens that are used by thousands of applications. The Facebook Developer's API is considered the first to be specific to a social network and was launched in 2006. Facebook later created an open stream API, allowing outside developers access to user's status updates. By June, 2010, Twitter integrated API into their applications and is considered the most open of all social networks. By 2008, expanded geolocation technologies including cell tower localization became available and devices such as digital cameras and camera phones began to integrate features such as Wi-Fi connectivity and GPS navigation into more sophisticated capabilities.
Geosocial networking allows users to interact relative to their current locations. Web mapping services with geocoding data for places (streets, buildings, and parks) can be used with geotagged information (meetups, concert events, nightclubs or restaurant reviews) to match users with a place, event or local group to socialize in or enable a group of users to decide on a meeting activity. Popular geosocial applications like Yelp, Gowalla, Facebook Places and Foursquare allow users to share their locations as well as recommendations for a locations or 'venues'.
In disaster scenarios, geosocial networking can allow users to coordinate around collaboratively filtered geotag information on hazards and disaster aid activities to develop a collective situational awareness through an assembly of individual perspectives. This type of geosocial networking is known as collaborative mapping. Furthermore, geolocated messages could assist automated tools to detect and track potential dangers for the general public such as an emerging epidemic (see Flu Detector application on Twitter).
The technology has obvious implications for event planning and coordination. Geosocial has political applications, as it can be used to organize, track, and communicate events and protests. For example people can use mobile phones and Twitter to quickly organize a protest event before authorities can stop it. People at the event can communicate with each other and the larger world using mobile device connected to the Internet. Geosocial has the combined potential of bringing a Social Network or Social Graph to a location, and having people at a location form in to a Social Network or Social Graph. Thus social networks can be expanded by real world contact and recruiting new members.
Additional features 
All geosocial networks revolve around specific features that are additional to geolocating.
Ad hoc networking 
A mobile ad hoc network is an opt-in group of mobile devices in the same immediate area linked to a master device. These groups are then able to communicate freely with each other. This sort of social networking is used mostly during events so the host (operating the master device) can provide information, suggestions or coupons specific to the event. Examples include Apple's iGroups and Hot Potato.
Food sourcing 
A less-used form of geosocial networking is one mostly used by fast food restaurants, like 4Food, in which customers check-in their orders rather than themselves. Users choose the ingredients of their order, name it, and are awarded points for every order based on their suggestion. Customers are given discounts and coupons for their involvement and the restaurant receives more customers.
Freelancing networks are created with the specific purpose to allow users to find or post temporary employment opportunities. Users establish and operate a professional profile and are able to connect with past and possible employers, employees, colleagues, classmates and friends.
With location-planning, or social-mapping, users are able to search and browse nearby stores, restaurants, etc. Users Venues are assigned profiles and users can rate them, share their opinions and post pictures. These networks use the location of mobile phones to connect users and may also provide directions to and from the venue by linking to a GPS service. Examples include Google's Ogle Earth, Tagzania and forms of collaborative mapping.
Some networks use Moodsourcing as a recreational way to make user's status's seem more similar to personal interaction. In addition to checking in, users convey their current mood with a corresponding emoticon.
Paperless ticketing 
Paperless ticketing is a feature that uses smart phones as digital tickets for events and travel. Besides becoming more convenient than the normal ticketing process, Paperless Ticketing eliminates wasteful paper use. Examples include Apple's recently purchased patent for a travel ticketing app, ITravel, and Ticketmaster's smart phone application.
Social shopping 
Social shopping service users create personal profiles to collect information on different items they find. Instead of simply updating their status on other social networks with a description or link of their purchases, users download software that allows them to grab images of those products to post on their own shopping lists. Some Social Shopping sites form affiliate relationships with merchants, who often pay percent commissions on sales that come as a result of their products being featured on other sites. Sites have gone so far as to allow users to add their credit card number so their purchases are automatically checked in.
Some fashion corporations have invested in sensors placed in their stores and dressing rooms so users on Social Shopping applications have to physically be in their store or trying something on in order to gather points. This increases participation and encourages customers to try on other clothes. Examples include ThisNext, Shopkick and Do Together.
Privacy policies 
Some sites, like Facebook, have been scrutinized for allowing users to "tag" their friends via email while checking in.
Opt-in vs. opt-out 
An "opt-in" is a permission-based network that requires a user to join or sign up. The host is then given permission to access the user's information and to contact him or her. An "opt-out" network is defaulted to have the user included in a group. Users must remove themselves from the network if they wish to not be included.
Twitter Co. vs. the FTC 
Early in 2009 Twitter faced two different security incidents in which user accounts were accessed by unauthorized sources. There were 45 accounts accessed in a January incident and 10 that April for short periods of time. In the first incident, unauthorized joke tweets were made from nine accounts and hackers may have accessed nonpublic information such as email addresses and mobile phone numbers. In the second, private information was accessible and at least one user’s password was reset. Within hours of the January breach, Twitter Co. closed the security hole and notified affected account holders. In the April incident, within minutes of the hack Twitter Co. removed administrative access to the hacker and quickly notified affected users.
The United States Federal Trade Commission (FTC) launched an inquiry into Twitter Co.'s security practices related to these attacks and announced that both they and Twitter Co. reached an agreement that resolves the FTC's security concerns. Since the account breaches and FTC statements, Twitter Co. has implemented many of the FTC's suggestions and released a statement that the agreement "formalizes our commitment to those security practices".
See also 
- Location awareness
- List of social networking websites
- Virtual community
- Geographic information system
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