rational usage of natural resources
geological spatial objects grouping
N. G. Mustafin, A. V. Ponomarev, S. V. Savosin
The task of grouping objects on the map
The problem of grouping has application in the field of natural resource management, which the selection of groups of primary objects (mineral deposits, enrichment plants) and consolidation them into aggregate objects. In the future, the strategy of development of mining in a region is defined in terms of that aggregated objects.
There are several levels of aggregation and, thus, several kinds of aggregated objects. The first two levels are industrial raw nodes (IRN) and the geological-economic areas (GEA).
Approaches described in this article have been implemented in the form of algorithms in the analysis of geographic information systems.
The grouping based on the logistics
The task of selecting industrial raw nodes (IRN) is the following. Given a set of mineral sites (MS), a set of processing factories and a transportation infrastructure. Be sure to highlight a number of multiple clusters of ore processors and objects, united by a common transport network and the supply chain. Moreover, each partitioning can be assessed.
A heuristic algorithm that divides the set of objects into two set: the potential points and the potential of satellites for a number of geological and economic parameters, and then making a groups by locally optimizing the cost of transport and capital costs for processing.
Grouping based on integrated assessment of territory
When it comes to the challenges of geological and economic zoning and selecting larger, integrated facilities, which are, for example, GEAs, a number of factors to be taken into account, significantly growing, so for this kind of tasks the method of integral assessment was tested.
The method is based on three key concepts: objects value, object impact profile and influence loss.
A mesh S is put on a map and for each cell the value of assessment criterion V(x,y) is calculated by valuing the zone of influence of the set under consideration at this level of objects.
The influence of each object on the surrounding area is calculated using a modified wave front algorithm based on characteristics of the object and a set of characteristics of the territory, usually integrally reflecting the transport infrastructure and terrain features. Total assessment of a cell is the sum of influences of all the objects.
The boundaries of the GEA (or GEA nuclei) are formed by sections of the resulting 3D surface