Lina Lv

Virtual urban — A scientific tool and platform for urban research

Virtual reality is one of the earliest dreams human owns; nowadays, people are still making further research and attempts in this field and accumulating a lot. Virtual urban is one formation of virtual reality, researches were making experiments of urban on the platform of virtual urban through construction of all kinds of urban models. These experiments not only offered incredible simulation effects, but also provided a scientific platform for studying urban rules, which could be further applied in urban management, spatial planning and so on. This paper briefly summarized the developments of virtual reality and virtual urban, it focused on the core for virtual urban research — urban model. In the end, these papers summarized the advantages and disadvantages of urban models, and look into the future trends of virtual urban.

GIS-based weight of evidence modeling for cultivated land suitability mapping

The cultivated land protection has become a leading concern influencing the actions of the Chinese government and people. This study introduces a method named as the weight of evidence (WOE) using natural and geographical location factors to evaluate the suitability of Jinan cultivated land. Evaluation results show that: (1) weight of evidence method as a pure data-driven approach is suitable for confirming each index’s weight in the cultivated land suitability evaluation, and the weights are objective and easy to be explained; (2) weight of evidence method uses raster data which are convenient for spatial analysis and does not need to unify the evaluation unit; (3)About 60.25% of land in Jinan has superior suitability as cultivated land. The technical ideas and methods proposed in this paper can provide support for taking a fresh look at land suitability evaluation and policy making. It will also help decision-makers optimize land allocation and make better land-use planning decisions.

Directed Graph based formulation of land resource security adjustment and control

Land resource security has come to be a popular issue, and the researches mainly focus on static evaluation of the level of land resource security. But the growing lack of land resource caused by various factors requests us turning our researches on land resource security to dynamic adjustment and control urgently. This paper describes a specific directed graph model on which the model of land resource security adjustment and control can be built. The core idea of this paper is applying the visuality, the clearness and the convenience of directed graph into the process of land resource security adjustment and control. At last, we develop program to visual the directed graph model and realize the method of dynamic adjustment which let the decision-maker control the level of land resource security easily.