The problem of the isolines of seismic tremors constructing is solved. For this purpose a special computer program is designed. The operational construction of isolines can be used to assessment of negative post-seismic consequences after the expected or just occurred earthquakes. It is proposed to use two equations of the seismic intensity decay (exponent and N.V. Shebalin formula) for eight directions. Sets of the selected formula coefficients are stored as models of the decay of seismic intensity forthe examined region. They can be used later for similar situations. The available information about the distribution patterns of seismic effects on the ground is used for the program configuration. Such data are obtained from the macroseismic inspection of the selected region after previously occurred earthquakes.
Conceptual design and development of GIS of geological information funds are considered in the article. Integration approaches, cartographic presentation, web search and dissemination of geographic information are discussed. We analyzed the properties of geo-information and its transformation into knowledge and control solutions, the creation of geospatial ontology, and the construction of the spatial data infrastructures based on international standards. We discussed the creation of the unified geo-information space as a basis of the informatization of geological information funds by use of the geoportal solutions. Implementation of conceptual solutions is considered by an example of the Cartographic Information Retrieval System of the State Bank of Digital Geological Information.
In the paper the authors suggest and formalize the conception of polycriterion distant control of parameters of geomagnetic field and its variations, which realizes a paradigm of integration of heterogeneous data sources into single information space with cross-platform mechanism of their analytical processing and interpretation to provide an improvement of informativity and efficiency in solving problems of analytical control of the Earth’s magnetic field.
Application of GIS technologies
The article deals with the problems of formation of professional competence of IT specialists in the field of GIS technology application to solve the tasks of monitoring and management of territories.
The «Seis-asz» software complex has been developed, it allows to process the flows of seismic events with graphing of various parameters of these flows in a running window. The main parameter in this system is instability criteria of seismic process, determined by response of the medium to the tidal exposure (the LURR-method). With help of the «Seis-asz» software complex for seismically active region of Russia – Sakhalin – it has been analyzed the flows of seismic events in time to reveal the phases of seismic process instability timed to preparing of major earthquakes. In terms of the findings fundamental possibility of medium-term forecast by the LURR-method is shown. The complex can be used to evaluate seismic hazard in real time if live seismic data are available.
The authors developed software package for data sea level that were considered in the paper. The features of the processing and display of large (more than 15 million dots) data sets were investigated. Different algorithms of spectral analysis were compared, is described the developed algorithm for calculating the current spectrum and current mutual spectrum and the original optimization technique of successive filters. The results of calculations examples were shown on pictures.
Modeling geo objects and geo-processes
In this paper we present an approach to data processing of geophysical monitoring based on mathematical statistics methods. The proposed algorithms use elements of correlation and regression analysis. We describe the structure and elements of data processing technology of geographically distributed sensors.
The article is devoted to the actual problem of determining the speed of hodographs refracted waves. Using the Monte Carlo method allowed to determine the minimum necessary basis for the finding of a sufficiently precise speed depending on the level of non-linearity of the hodograph.
The changes in the area of the lake on the territory of thermokarst-lake plains were studied using multi-temporal satellite images Landsat, obtained over a period of four decades. Chosen 53 test sites were located in the subzone of continuous permafrost in Western and Eastern Siberia and in different landscape zones of studied territory. From a few hundred to a few thousand thermokarst lakes were identified at each test site. Lake areas were measured by means of satellite images of geographic information system ArcGIS 9.3. It is shown that in Western Siberia on average there is a tendency of reducing the total area of the lakes. But there is the specific feature of the latitude dependence of the dynamics of the lake areas: at latitudes greater than 70° N. dominated by the growth of the total area of lakes and at latitudes less than 70° N. there is a tendency to reduce their areas. On the territory of Eastern Siberia permafrost prevails on average increase in the area of thermokarst lakes. Unlike Eastern Siberia in the subzone of continuous permafrost in Western Siberia near the values of 70° N. is found the transition zone from the trend of reducing the lake areas to trend of their growth with increasing latitude.