Updating Technology of Spatial Data of Forest Resource Based On Temporal-GIS

  • Information and Computer Engineering College, Northeast Forestry University, Harbin 150040, China

Received date: 2013-03-13

  Revised date: 2013-05-03

  Online published: 2013-08-08


Spatial data of forest resource is that related data which has characteristic of space geometry. It mainly comes from the forest resources survey, including the national forest resource continuous inventory and the local annual survey. It often lost information of time among the surveys. It causes difficult to achieve the characteristics of historical inquiry. Therefore, temporal-GIS was introduced in this paper. The sub-compartment is the basic unit of forest resource investigation and management. Taking it as the main research object, as the same time, introducing the time factor, we have established a data update model based on temporal-GIS. The object of this model is to improve the update rate realize the historical query of forest resources spatial data. In this paper we have analyzed the changes of forest resources spatial data and has understood those changes are due to reasons such as natural growth of trees, disasters, legal and illegal human activities and the survey error. According to the variation of space and attribute, the variation type of sub-compartment is divided into eight basic ones. Through described temporal and spatial information of sub-compartment updating we have improved the traditional base-state with amendments by the way of dynamic classification indexes. At the same time, we have extended model through object-oriented and version management. On this basis, we structured a new spatio-temporal data model named version-based multi-base state extended spatio-temporal data model with amendments which is short for VBMBSEA-STDM. The article has a systematic description of model mainly about the three aspects: data structure of sub-compartment object, basic spatial operation of sub-compartment object and data storage of sub-compartment. According to the study, by analyzing the data of Liangshui experimental forest in 1999 and 2009, it reaches the specific changes form of sub-compartment data. It has constructed a spatio-temporal data update model of forest resource to realize the historical comparison and backtracking.

Cite this article

GAO Xin-Dan, TAN Ti . Updating Technology of Spatial Data of Forest Resource Based On Temporal-GIS[J]. Journal of Geo-information Science, 2013 , 15(4) : 518 -526 . DOI: 10.3724/SP.J.1047.2013.00518


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