At-location mapping
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At-location mapping (ALM) is closely related to
location-based service A location-based service (LBS) is a general term denoting software services which use geographic data and information to provide services or information to users. LBS can be used in a variety of contexts, such as health, indoor object search, en ...
s (LBS). However, ALM focuses on the delivery of maps 'at location', using mobile devices that are enabled with
Global Positioning System The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite ...
(GPS) technology. At-location mapping devices, like
personal digital assistant A personal digital assistant (PDA), also known as a handheld PC, is a variety mobile device which functions as a personal information manager. PDAs have been mostly displaced by the widespread adoption of highly capable smartphones, in part ...
s (PDAs) or
cellular telephone A mobile phone, cellular phone, cell phone, cellphone, handphone, hand phone or pocket phone, sometimes shortened to simply mobile, cell, or just phone, is a portable telephone that can make and receive calls over a radio frequency link while ...
s, deliver maps on small screens that can be used for navigation or
wayfinding Wayfinding (or way-finding) encompasses all of the ways in which people (and animals) orient themselves in physical space and navigate from place to place. Wayfinding software is a self-service computer program that helps users to find a location, ...
. The attributes of these maps are that they are small, perhaps only 100 × 100
pixel In digital imaging, a pixel (abbreviated px), pel, or picture element is the smallest addressable element in a raster image, or the smallest point in an all points addressable display device. In most digital display devices, pixels are the ...
s and they must work adequately on small colour screens. ALM is a developing area that contributes geographical content to services provided by mobile devices using the mobile Internet of cellular telephone services. Geographic information systems Location-based software {{Map-stub