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Possibility of making queries on a spatial database, in order to obtain a decisional support is one of the most interesting features of GIS systems. This is possible through the expression of information which are implicit into database and useful for Geoprocessing operations in order to make a sort of data clustering. However, it is not sufficient...
Citations
... V době "moderního GIS", vybaveného již grafickým rozhraním, to znamenalo paradoxně naopak dostat získaná numerická data z numerického výpočetního modelu do grafického formátu pro software GIS (tematické vrstvy dat). (Barrile, Armocida, Di Capua, 2009;Bravo, Casals, Pascua, 2007) Základem kroku 2 -přípravy dat či konstrukce geoinformačních vztahů je přiřazení klimatických charakteristik v jednotlivých časových horizontech k vybraným jednotkám území, a to k definičním bodům katastrálních území. Jako vztahový ukazatel byl použit Langův dešťový faktor (LDF): ...
Základem příspěvku je aplikace tezí tzv. konstruktivní teorie systémů na model predikce pravděpodobného trendu důsledků globálních klimatických změn na vegetační kryt území ČR. Metodickým východiskem, podrobněji rozvedeném v první části příspěvku, je bývalý Integrovaný informační systém o území ISÚ a jeho subsystém Ekologická banka dat ISÚ. Samotný model predikce, jehož obdobně koncipovaná systémová charakteristika je předmětem druhé části, je realizován v prostředí technologie geografických informačních systémů. Základem systémových vazeb modelu je časoprostorová komparace klimatických podmínek a vlastností vegetačního krytu území. Model byl využit pro analýzu dat vhodnosti pěstování vybraných dřevin.
... Analysis of the relationship between GPS radio waves and the base station is also required. In addition, further development of advanced GPS systems are also required for GIS applications [9], [10]. ACKNOWLEDGMENT The experiments in this paper were made possible by the great advice that we received from Group Leader Dr. Takishima of KDDI Research Labs. ...
In recent years, studies of location identification by mobile phone have been attracting a lot of attention. Especially, GPS contents of mobile phones are increasing for the purpose of various kinds of applications, such as games, navigations and so on. So far, many investigations have been carried out for the performance of conventional GPS devices, but few people study mobile phone GPS performance. In this paper, we measure and examine the performance of mobile phone GPS using various types of terminals of different venders under some environments. As for the performance improvement, we propose efficient methods and evaluate them for the methods including distance errors and direction errors of GPS. The reduction methods for such errors applying the group characteristics of mobile phones are also described.
Geodynamic phenomena monitoring is constantly evolving; however, earthquake prediction is still impossible. The acquired big data over time availability allows us to create specific models to simulate these phenomena. Generally, earthquakes happen in clusters, and major aftershocks are preceded by other small aftershocks. Applying mathematical models to the swarm measurement data provides the seismic event probability of a given magnitude in a given region. Predictive systems of seismological phenomena and soft computing techniques can therefore help to obtain good choices for the citizens’ safety when a given danger threshold is exceeded. In this regard, the possibility to have significant and reliable displacement data of network points repeated over time deriving from GPS monitoring networks set up across the monitored faults, as well as the use and implementation of dynamic GIS that also use “predictive” layers based on the use of neural networks and soft computing, can provide on one hand databases useful for the implementation of predictive models (soft computing techniques that use displacements as input data) and on the other hand valid information on propagation of the isoseismal (starting from information relating to the study area, the hypocenter of the considered earthquakes and the seismic intensity determined according to standard procedures). The objective of the following work is therefore to present and analyze the results of a prototypal predictive system developed by the Reggio Calabria Geomatics Laboratory. This prototype use a GIS systems and soft computing techniques. It allows on one hand to calculate the probability of seismic event's occurrence (event of known intensity that follow another also known) and on the other to identify and predict the isoseismal's propagation. The Gis system incorporate and implement rigorous methodologies for displacements computing on GPS networks repeated over time, while the soft computing uses the surface's displacements points monitored by a GPS network and the events that took place in their surroundings. The methodology was tested in the central Tyrrhenian area of Calabria (where there are a series of active faults). focusing in particular on the Falerna -Fuscaldo fault (Italy).
