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Fast conversion method of space vector data

A fast conversion, space vector technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve the effect of improving utilization and sharing

Inactive Publication Date: 2011-04-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some limitations and deficiencies in the actual application of the current urban cadastral database construction standards, which may need to be expanded in specific work

Method used

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  • Fast conversion method of space vector data
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  • Fast conversion method of space vector data

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Experimental program
Comparison scheme
Effect test

Embodiment

[0056] The first step is to establish the table structure of the data conversion template in the spatial database. According to the "Urban Cadastral Database Standard" promulgated in 2007, modify the content of the data conversion template according to the user's requirements. The table structure of the data conversion template is shown in Table 1;

[0057] Table 1 Data conversion template structure table

[0058] field name

field meaning

OBJECTID

Object ID

ReID

ID in the data table

ReName

Field Name

ReAliasName

field alias

ReType

Field Type

ReAllowNull

non-emptiness

ReDefault

Defaults

ReLength

length

RePrecision

precision

ReGeoDef

geometry type

TabName

attribute structure table name

ExtTabName

Extended table name

FldStd

Whether standard fields (only convert standard fields)

[0059] The second step is to create a poi...

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Abstract

The invention discloses a fast conversion method of space vector data. The method comprises the following steps: 1), a data conversion template is created in a space database for defining the relations among all the vector data layers; 2), a plurality of temporary files for realizing the intermediate processes of fast conversion are created locally; 3), dot information, line information, plane information, attribute information and note information are read from the space database in sequence and written in the temporary files created in step two; 4), the temporary files serving to the intermediate processes are integrated and appended, and VCT files containing topology 1 information are finally generated. The method adopts a data buffering model mechanism to perform the space relation analysis of data, and proposes a linear order ranking algorithm of a fragmentary polygon to solve the linear order ranking problem of lines for forming a polygon, thereby data conversion efficiency and quality are improved. The method has wider application prospect for cadastral data management works in cities and towns and relevant works.

Description

technical field [0001] The invention relates to the field of urban cadastral data management, in particular to a fast conversion method for space vector data. It also has a certain reference value for other related cadastral industries, and this method has practical significance for the management of cadastral data in land and surveying and mapping departments. Background technique [0002] At present, there are about 10 kinds of large-scale cadastral data management software commonly used by people. Most of these softwares have their own data structures and formats. At the same time, due to differences in data standards, data platforms used, and understanding of data models, the process of spatial information sharing is relatively slow, and there are a lot of wasteful phenomena such as repeated production and development in our country. In order to solve these problems, in the "Urban Cadastral Database Standard" promulgated in 2007, the state set the data conversion file f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 张丰刘仁义刘南卫哲杜震洪唐远彬
Owner ZHEJIANG UNIV