Navigation: 1) What is a Map Projection? 2) Scale distortions on a Map 3) Properties of Map Projections 4) The classification of Map Projections 5) Selecting a suitable Map Projection 6) Map Projections in common use Map Projection in Common Use Several hundreds of map projections have been described, but only a smaller part is actually used. Most commonly used map projections are: Universal Transverse Mercator (UTM), Transverse Mercator (also known as Gauss-Kruger), Polyconic, Lambert Confomal Conic, Stereographic projection. These projections and a few other well-known map projections are briefly described and illustrated. Cylindrical projections Mercator projection The Mercator projection is a conformal cylindrical projection. Parallels and meridians are straight lines intersecting at right angles, a requirement for conformality. Meridians are equally spaced. The parallel spacing increases with distance from...
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The application of a cellular automaton model for predicting deforestation: patterns and processes of LULCC in the Ecuadorian, AmazonFrom: gisremote.blogspot.com
Post Date: 2008-02-18 19:10:00
Abstract Global change research includes an extensive body of literature covering population-environment interactions focusing on the central issues of migration and demography, environmental site and situation, and socioeconomic structures addressed within a spatially-explicit but temporally dependent form. Quite often this is simply because neither the data nor the modeling methodology combine well to effectively address uncertainty and spatially defined time-series data within a non...
more Latest El NiƱo/La NiƱa Jason DataFrom: gisremote.blogspot.com
Post Date: 2008-02-03 00:23:00
Jason continues providing the uninterrupted time-series that originated with TOPEX/Poseidon. Jason is using radar altimetry to collect sea surface height data of all the world’s oceans. These image are the latest elnino/la nina from Jason data served by NASA . We can get more el nino and la nina images from NASA website . For summary, until today, folowing info you can find there; Image Archive (last 10 images) 12/24/2007 , 12/09/2007 , 11/27/2007 , 11/12/2...
more La NiƱa in mid-October of 2007From: gisremote.blogspot.com
Post Date: 2008-02-03 00:08:00
Collected by the U.S-French Jason altimetric satellite, the tropical Pacific Ocean remains in the grips of a cool La NiƱa, as shown by new data of sea-level heights from mid-October of 2007. Image source: http://sealevel.jpl.nasa.gov This La NiƱa has slowly strengthened for the past nine months which is indicated by the blue area in the center of the image along the equator. Blue indicates lower than normal sea level (cold water). Oceanographer Bill Patzert of NASA’...
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