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Method for storing topographic image data in pyramid architecture

A technology of image data and pyramids, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc.

Active Publication Date: 2009-05-20
BEIJING LINGTU SOFTWARE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a method for storing topographic image data in a pyramid structure, so as to solve the problems of fusion of different precision data and elimination of invalid data

Method used

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  • Method for storing topographic image data in pyramid architecture
  • Method for storing topographic image data in pyramid architecture
  • Method for storing topographic image data in pyramid architecture

Examples

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Embodiment Construction

[0029] Such as image 3 Shown is a schematic flow chart of storing grid data in a pyramid structure according to an embodiment of the present invention. First, determine the data precision and grid number (step 301) of each data layer in the pyramid storehouse; Then obtain the original data, and determine the precision of the original data, and geographical range (step 302); According to the same pyramid data with the original data precision The number of grids of the layer, the original data is cut into tiles (step 303); Determine the current tile, and according to the geographic range of the current tile, determine the position of the current tile in the pyramid data layer identical to the original data precision storage location (step 304); starting from the determined storage location, upwardly generate the complete quadtree where the current tile is located (step 305); put the current tile into the determined storage location, and set the The position is a leaf node (ste...

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Abstract

A method of using pyramid structure to store topographic image data includes confirming data accuracy and lattice number in pyramid library, obtaining original data and geographical range, cutting original data to be Rajchmans and confirming current Rajchman storage position in data layer of pyramid, forming complete quadtree of current Rajchman upwards from confirmed storage position, updating a corresponding data of quadtree father node existed with current Rajchman upwards from said storage position till to top layer.

Description

technical field [0001] The invention relates to a data storage method, in particular to a method for storing terrain image data in a pyramid structure. Background technique [0002] The geographical scope involved in GIS (Geographic Information System, geographic information system) is gradually increasing, and the application is relatively wide at the city level, and the largest is even developed to the global scope. As the geographic scope expands, so does the data it uses. The management and application of massive data has become a serious bottleneck restricting various applications to image / terrain data (collectively referred to as grid data hereinafter). [0003] Orthophoto data generally adopts the method of framing management, that is, according to certain rules, the data of the entire city is divided into several slices, and numbered, which is easy to manage. For a large city, there are usually thousands of 0.5-meter-resolution orthophoto data, each of which is abo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 孙庆文
Owner BEIJING LINGTU SOFTWARE TECH CO LTD