A quick view client combined with 3D earth

Abstract

A quick-look client combined with the three-dimensional earth comprises a data receiving and processing thread, a window rendering thread and a geographical name inquiring thread. The threads performs information exchange with one another through a QvInfo structure. A configuration module reads information from a configuration file and provide the information to the three threads. The data receiving and processing thread receives quick-look data, performs resampling to the received images, analyzes satellite auxiliary data, and stores the processed data in the QvInfo structure. The geographical name inquiring thread calculates longitude and latitude of a point pointed by an optical axis of a sensor, transmits the longitude and latitude to a WMS (web mapping service), receives a GetInfo data structure fed back by the WMS, analyzes the GetInfo data structure to obtain the geographical name information corresponding to the longitude and latitude, and stores the geographical name information in the QvInfo structure. The window rendering thread renders the image data, the satellite auxiliary data information and the geographical name information, calculates poses and positions of a satellite three-dimensional model in the three-dimensional earth, and completes rendering of the satellite three-dimensional model in the three-dimensional earth.

Description

Technical field [0001] The invention relates to a quick-view client combined with a three-dimensional earth. Background technique [0002] Before the images downloaded by the Earth observation satellite are processed for radiation and geometric correction, the received raw data needs to be formatted, decompressed, and image stitching records, etc., which are called satellite image collection. [0003] During the acquisition process, the QuickView client simultaneously displays the simple sampled satellite image and the current attitude orbit information on the terminal. The data sent to the QuickView client consists of three parts: [0004] 1. Quick view data description information (Quick view information header): Quick view data frame length. [0005] 2. Satellite auxiliary data information accompanying the image: satellite name, sensor name, ground receiving station name, imaging line count, satellite GPS position and speed, satellite attitude, and accuracy of satellite imaging ti...

AI Technical Summary

Problems solved by technology

[0008] In the existing system, the ground system personnel need to have rich geographical knowledge or quickly browse the map to understand the location of the imaging area at the moment from the latitude and longitude values, which is not conducive to the rapid interpretation of satellite images

Especially in emergencies such as earthquakes, if the on-duty personnel cannot link the quick-view image with the disaster area location to judge the imaging effect during the acquisition stage, they can only wait for the track image to be processed on the ground through many steps such as acquisition, cataloging, and radiation. After archiving and geometric correction, the distribution system can only know whether the satellite image data of the disaster area can be effectively obtained after arriving at the distribution system and marked by GIS, which may delay several hours

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