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Estimation method for urban road areas

A road and area technology, which is applied in the field of urban road area estimation based on grid-vector conversion, can solve the problems of high collection cycle and cost, high professional requirements, and unsuitable for rapid decision support, etc. It is easy to implement, simple in principle, and fast in implementation estimated performance

Active Publication Date: 2016-08-24
中冶地理信息(广东)股份有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1) The acquisition cycle and cost are relatively high, which is not suitable for rapid decision support;
[0007] 2) A large number of professional and technical personnel are required, with high professional requirements

Method used

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  • Estimation method for urban road areas

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Embodiment Construction

[0053] See figure 1 Shown is a flow chart of the method for quickly estimating urban road area based on grid-vector conversion in the present invention. The embodiment of the present invention takes the rapid survey of urban road area in the main urban area of ​​a certain city as an example; the operating platform is the Windows 7 operating system on the PC, and the geographic information system development platform is Beijing SuperMap geographic information platform software version 5.3.3.

[0054] In order to accurately define concepts, ensure the correctness of language expression and facilitate the realization of methods, the following contents are explained and defined:

[0055] Pixel scale: each pixel represents the actual size multiplied by 10,000, for example, the corresponding scale of 2.5m resolution is 1:25,000;

[0056] Pixel resolution: each pixel represents real-world size;

[0057] Color value: use 256 base, the conversion formula is Value=256 2 *R+256*G+B; ...

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Abstract

The invention discloses an estimation method for the urban road areas based on grid vector conversion. The estimation method includes the following steps that A, layers are arranged, and road information is only displayed; B, grid picture data is downloaded with the resolution ratio about 2.5 m; C, grid pictures within the range of the to-be-computed road areas are jointed; D, the jointed grid pictures are decolorized to obtain black-and-white pictures; E, the jointed grid data is corrected; F, the corrected grid data is subjected to grid vector conversion; G, vectorized grids meeting the certain gray-level condition are subjected to SQL querying; H, grid data filtered by SQL is merged to obtain preliminary road data; I, result data is smoothed, classification statistics is carried out, and all kinds of road areas are obtained. According to the estimation method, it is achieved that the urban road areas are rapidly estimated based on the grid vector conversion method; estimation method is simple in theory, easy to operate and specifically suitable for analogous special area statistics.

Description

technical field [0001] The invention relates to the technical field of geographic information processing, in particular to a method for estimating urban road area based on grid-vector conversion. Background technique [0002] Grid-to-vector conversion is an unresolved problem in computer graphics. Currently, electronic maps are used in various fields, but most of them are limited to the primary stage of civil use, and there are not many studies on specialized applications. Due to the strengthening of copyright protection awareness, major electronic map service providers often use tile services when providing services, and distribute the service content to customers through tile technology. The tile data is a typical raster image data, which can only be used for simple measurement and calculation, and is difficult to apply to classification thematic applications. At present, the demand for emergency and rapid acquisition of urban thematic data is very tight, such as dynamic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/29
Inventor 魏金占陈思宁王礼江杨建科杨学峰岳国森
Owner 中冶地理信息(广东)股份有限公司