A Method for Automatic Construction of Temporal Topology of Land Use Data

Abstract

The invention relates to a land-using data temporal topology automatic construction method. The method includes establishing a historical land using database, including a land using database of primary investigation in the transition period and a land using database of secondary investigation, and an annual change investigation database; reestablishing the land using current data in the land using database of primary investigation in the transition period; extracting land using change increment according to the reestablished land using current data of the primary investigation in the transition period and land using current data of the secondary investigation and the annual change investigation database after the secondary investigation; generating change event tables according to the land using change increment, recording element entities, farther to son inheritance relations and change types before and after changes, assigning the producing time and extincting time of the element entities, and completing land-using data temporal topology automatic construction. By the aid of the method, workload of establishing a land-using data temporal database is reduced greatly, and efficiencies of spatial data retrieval and trend analysis are improved.

Description

technical field [0001] The invention relates to the technical field of temporal data database construction based on geographic events, in particular to a method for automatically constructing temporal topology of land use data. This method has important practical significance for strengthening land use management and monitoring land use change trends. Background technique [0002] Since 1984, my country has completed the first and second national land surveys, carried out annual land change surveys, and accumulated massive land use data. The current land management business urgently needs to use long-term temporal data for historical retrospective, change monitoring, and trend analysis to provide technical services for urbanization development, cultivated land protection, and land markets. Temporal database is the basis of spatio-temporal data mining analysis. The amount of land use survey data is huge, and it is not realistic to establish a temporal database by manually c...

AI Technical Summary

Problems solved by technology

[0005] To sum up, the spatio-temporal data model does not consider the data content inconsistency and data structure dissimilation of land use data in different periods. It is suitable for incremental change extraction, parent-child inheritance relationship identification, and topological relationship construction based on the land use status data of the first adjustment, the transition period, and the second adjustment, which is not conducive to spatiotemporal data retrieval and trend analysis

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