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The Study of the Raster Data Spatio-Temporal Data Model in GIS and Its Application

Author: ChenZhiBo
Tutor: LuShouYi
School: Beijing Forestry University
Course: Forest Management
Keywords: Raster data Temporal data model Linear quadtree RD-STDM Analysis of spatial and temporal difference
CLC: P208
Type: PhD thesis
Year: 2005
Downloads: 1291
Quote: 12
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Abstract


Papers from the start with the basic characteristics of the analysis of spatial data, property, space, timeliness indivisibility of the three elements of spatial data, and among the traditional GIS in management time and space limitations of the data, proposed development the reality and necessity of the state Geographic Information System (TGIS), discusses the history of the temporal development of geographic information systems, the application of the background and development direction. TGIS The core issue is the establishment of the temporal data model, the paper on the current domestic and international research and development of the spatial and temporal data modeling are reviewed, and comments than temporal data model characteristics and existing problems. Raster data is a very important data in the GIS system structure, the data matrix structure suitable for the description of the continuous changes in natural phenomena, therefore, the papers from the landscape change simulation, dynamic evolution of the city, fire spread, expansion of land desertification and more The application areas of actual demand, the significance and necessity of the establishment of the the raster spatial and temporal data model. (1) Based on the idea of ??base state with amendments, first proposed the the quaternary linear quadtree coding (MQ code) GIS raster data compression of temporal data model RD-the STDM elaborated conceptual model, logical model and physical models. (2) under the premise of several compression methods commonly used analysis of raster data, determine the model of the RD-STDM quaternary linear the quadtree coding (MQ code) compression algorithm and was first proposed the MQ code based on a relational database and stack structure ideas and fast compression algorithm, so as to lay the necessary foundation for the management of of raster spatial and temporal data on the basis of the model of the RD-STDM. (3) In order to further reduce the amount of of raster spatial and temporal data stored, the article was first proposed separately and studied six changes in the spatial and temporal differences based on run-length encoding compression of raster data type based the MQ code raster data spatial and temporal differences in changes The three types, and gives the corresponding algorithm thought. Thought of the RD-STDM model of raster spatial and temporal data storage management in order to achieve a historical retrospective laid the foundation for further spatial and temporal analysis. (4) Based on the idea of ??set theory, first proposed change based on the MQ code the raster spatial and temporal data differences accumulate (superimposed) algorithm, ideological, and analysis of the difference changes accumulate operations four situations, for these four The situation is different, the design and programming of the corresponding algorithm. Lay the foundation so as to calculate a moment snapshot data (Snapshot). (5) based on the model of the RD-STDM thinking, MQ code compression algorithm, raster spatial and temporal data differences change algorithm, spatial and temporal differences in accumulation algorithm in a relational database, SQL Server 2000 on the design and implementation of the the raster spatial and temporal database, on this basis, using Visual C development and raster data spatial and temporal data management prototype system to the Yanchi County 1989 to 2003 a total of three land-use change raster data, for example, the RD-STDM model ideas and proposed algorithm validation analysis, the results showed that the RD-of the STDM model of the ideological and correlation algorithm is correct, to achieve the desired design objectives, fully qualified for the raster spatial and temporal data storage, management, analysis and output tasks. (6) In addition, also discussed the RD-STDM model with integrated GIS CA model some of the basic ideas.

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > General issues > Mapping database and information system
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