Abstract
Developing the structure of geodatabase and knowledge base to provide quantitative mapping of land suitability for cultivation the main crops has been shown in the research. The general model and catalogs of knowledge base were designed that are structuring and formalizing information for creating thematic and complex maps and geomodels.
 The real world spatial problems give rise to multi-criteria decision-making based on geographical information systems (GIS). The GIS environment provides both aggregation and spatial analysis of various georeferenced data. In this paper, the two approaches of multi-criteria evaluation (MCE) are represented - overlaying with the AND operation and the lowest score assignment on one criterion. An example of multi-attribute decision analysis is done using criteria for the crop suitability assessment. A comparison of those two approaches has been made, based on results of the land-use suitability mapping for the study crops - winter wheat, sunflower and corn. The results demonstrated that at certain locations, a range of criteria values, according to the AND operations had the lower applicability and less flexibility than according to the second approach, based on the lowest score assignment on one criterion. Designed maps characterize the threshold status of the soil quality to provide yields of studied crops on certain areas.
 A set of land suitability maps, designed as quantitative models of integration of environmental, soil and climatic conditions, would be very effective to manage the complex decisions under the crop cultivation.
Highlights
Ukraine, being rich in unique land resources, has favorable climatic and soil conditions for cultivation of sustainable crop yields
The geoinformation mapping system for quantitative land suitability assessment could be described as a set of input, intermediate and output data, as well as the processes of data processing, interaction and representation
The process of developing the structure of geoinformation mapping system has been defined by a set of attributes of the soil unit objects
Summary
Ukraine, being rich in unique land resources, has favorable climatic and soil conditions for cultivation of sustainable crop yields. Both anthropogenic activity and intensification of agricultural production have a tendency to grow, what leads to increase of a soil degradation. Land suitability is the fitness of a given type of land for a specified kind of land use [1]. The aim of land evaluation is to select the optimum land-use according to the purpose and scale of land units. Physical resources (e.g. climate, vegetation, water, hydrology, landform and soil), human and capital resources are the major kinds of the land-use resources [2]
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