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By Matteo Golfarelli

Foreword through Mark Stephen LaRow, vice chairman of goods, MicroStrategy

"A specific and authoritative booklet that blends fresh study advancements with industry-level practices for researchers, scholars, and practitioners." Il-Yeol track, Professor, collage of knowledge technological know-how and know-how, Drexel University

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We actually also violated some rules of aesthetics, for instance, by applying a different scaling factor in latitude compared to longitude. 1. The purpose of GIS • The techniques that we used included use of a colour scheme, use of isolines,3 some of which were tagged with their temperature value, plus a number of other techniques. 3 Isolines are discussed in Chapter 2. 1. The purpose of GIS GIS defined So, what is a GIS? In a nutshell, we can define a geographic information system as a computerized system that facilitates the phases of data entry, data analysis and data presentation especially in cases when we are dealing with georeferenced data.

In summary, we can say that changes to the Earth’s geography can have natural or man-made causes, or a mix of both. If it is a mix of causes, we usually do not quite understand the changes fully. We, humans, are an inquisitive breed. We want to understand what is going on in our world, and this is why we study the phenomena of geographic change. In many cases, we want to deepen our understanding, so that there will be no more unpleasant surprises; so that we can take action when we feel that action ˜ better, and can forecast must be taken.

The question which part must be represented should be entirely answered through the notion of relevance to the purpose of the computerized system. ˜ system discussed earlier in this chapter has as its purpose the The El Nino administration of SST and WS in various places in the equatorial Pacific Ocean, and to generate georeferenced, monthly overviews from these. If this is its complete purpose, the system should not store data about the ships that moored the buoys, the manufacture date of the buoys et cetera.

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