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The original example of an SDI is the United States National Spatial Data Infrastructure , first mandated in the OMB Circular A-16 in 1996. In Europe since 2007, INSPIRE is a European Commission initiative to build a European SDI beyond national boundaries; the United Nations Spatial Data Infrastructure ( UNSDI ) plans to do the same for over ...
A spatial data infrastructure (SDI) is a data infrastructure implementing a framework of geographic data, metadata, users and tools that are interactively connected in order to use spatial data in an efficient and flexible way. SASDI promotes efficiency by using state resources by sharing information among different spheres of government.
Environmental-friendly projects include the Fish River Spatial Development Initiative, the Wild Coast SDI, and two industrial development zones, the East London Industrial Development Zone and the Coega IDZ near Port Elizabeth. Coega is the largest infrastructure development in post-apartheid South Africa.
Geographic data and information is defined in the ISO/TC 211 series of standards as data and information having an implicit or explicit association with a location relative to Earth (a geographic location or geographic position).
SDI processes are underpinned and driven by the increasing need for improved quality and regularly produced information with better spatial and temporal resolution. Accompanying this need is the requirement, brought in part by the information revolution, to better differentiate between information that matters in any given policy context versus ...
GIS seems to provide many advantages in teaching geography because it allows for analysis based on real geographic data and also helps raise research questions from teachers and students in the classroom. It also contributes to improvement in learning by developing spatial and geographical thinking and, in many cases, student motivation.
The term was criticized by James M. Blaut: "the word metageography seems to have been coined by the authors as an impressive-sounding synonym for 'world cultural geography.'" [4] Lewis and Wigen, however, disagreed, arguing that every consideration of human affairs employs a metageography as a structuring force on one's conception of the world [5]
Stand density index (SDI; also known as Reineke's Stand Density Index [1] after its founder) is a measure of the stocking of a stand of trees based on the number of trees per unit area and diameter at breast height (DBH) of the tree of average basal area, also known as the quadratic mean diameter. It may also be defined as the degree of ...