By National Research Council (U.S.), Committee on Intersections Between Geospatial Information and Info
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Extra resources for IT Roadmap To Geospatial Future
Extent, wind velocity, direction), resulting in uncertainty, errors, and reduced accuracy. An integrated conceptualization combining the field and object perspectives is increasingly important and necessary to represent, for example, a storm as an object at one scale and to model its structure as a field at a different scale. The characteristics of geospatial data pose unique challenges to geospatial applications. 2 Continued one application and may be difficult to use or integrate with other geospatial applications.
Html>. LOCATION-AWARE COMPUTING 27 not adequate for all applications. , guidance systems for robotic equipment) require coordinates relative to specific objects. The specialized components needed for GPS impose weight, cost, and energy consumption requirements that are problematic for mobile hardware. Consequently, a number of other mechanisms for location sensing have been developed, and this continues to be an active area of research. A recent survey article by Hightower and Borriello (2001) offers a good summary of the current state of the art in location sensing.
Wireless Communication The past decade has seen explosive growth in the deployment of wireless communication technologies. Although voice communication (cell phones) has been the primary driver, there also has been substantial growth in data communication technologies. 11 family of wireless LAN technologies (IEEE, 1997) is now widely embraced, with many vendors offering hardware that supports it. 11 cell size (≈100 m indoor, 1 km free space) Range of sensing phenomenon (RFID <1 m) Spacing of pressure sensors (100%) Variable Variable, 6080 m range 1-3 m SOURCE: Adapted from Table 1 of Hightower and Borriello (2001).
IT Roadmap To Geospatial Future by National Research Council (U.S.), Committee on Intersections Between Geospatial Information and Info