Distributed algorithm for quickly establishing massive remote sensing image pyramid

Abstract

The invention relates to the cross field of geographic information and information technology, in particular to a distributed algorithm for quickly establishing a massive remote sensing image pyramid applied to the construction of National Spatial Data Infrastructure. The method realizes the algorithm for quickly establishing the massive remote sensing image pyramid by means of data distribution storage and parallel computation capabilities based on a PC (Personal Computer) cluster, through the steps of dividing N*M grids, performing pyramid establishment task distribution and scheduling and pyramid establishment and correctly dividing grids and computing grid information, and by means of a communication transfer task between a control node and a computation node; and the method mainly aims to solve the related technical problem of how to divide the N*M grids, etc. The distributed algorithm for quickly establishing the massive remote sensing image pyramid has the following advantages that: based on the data distribution storage and parallel computation capabilities, the speed of generating the massive remote sensing image pyramid is increased; and the problem of black edges causedby image block documents crossing grids is solved; therefore, the purpose of increasing the pyramid establishing speed is achieved and the pyramid establishment accuracy is ensured.

Description

technical field [0001] The invention relates to the intersection field of geographic information and information technology, in particular to an algorithm for quickly creating pyramids based on distributed massive remote sensing images, which is applied in the construction of "national spatial data infrastructure". Background technique [0002] As an important basic data in the national spatial data framework, remote sensing images provide basic image information services for land planning, surveying and mapping remote sensing, military transportation, water conservancy and hydropower, agriculture, forestry and environmental protection, etc. Sex is also increasing. [0003] Among them, the Beidou satellite navigation and positioning system launched by my country in recent years can provide all-weather, 24-hour real-time positioning services. Its positioning accuracy can reach the synchronization accuracy of tens of nanoseconds. The 250-meter-resolution multi-channel true-c...

AI Technical Summary

Problems solved by technology

[0008] The technical problems to be solved in the present invention are: how to divide the N*M grid, how to create a pyramid task assignment and scheduling and create a pyramid, how to correctly divide the grid and calculate the grid information, and solve the image block file Related technical problems such as "black border" caused by crossing the grid

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