A browser-side 3D point cloud profile rendering method and rendering system
A technology of 3D point cloud and browser, applied in the direction of instrumentation, computing, electrical digital data processing, etc., can solve problems such as complex operation and long response time, and achieve the effect of improving the efficiency of data analysis
Active Publication Date: 2022-03-08
飞燕航空遥感技术有限公司
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[0004] Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides a browser-side 3D point cloud profile drawing method, which responds in real time to the point cloud profile drawing range determined by the user on the browser side by clicking points, and allows the user to Carry out three-dimensional rotation operation on the section to solve the problems of existing point cloud section drawing that need to install professional processing software, complex operation, long response time, etc.
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[0058] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.
[0059] The invention discloses a browser-side three-dimensional point cloud profile drawing method, such as figure 1 shown, including:
[0060] S1. Load the point cloud and the 3D scene where the point cloud is located on the browser side;
[0061] Raw point cloud data is usually in LAS format, which is an industry standard format for LiDAR data. In this embodiment, the server processes the point cloud data in LAS format and converts them into data carrying a pyramidal hierarchical structure for quick browsing, and then publishes the processed point cloud data as data services through the GIS data service engine for browsers read. The browser loads the point cloud data and the 3D scene where the point cloud is located through the read data service.
[0062] When the browser displays the loaded point cloud, in order to present a better visua...
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The invention discloses a browser-side 3D point cloud profile drawing method and a drawing system, wherein the drawing method includes: 1. Loading the point cloud and the 3D scene where the point cloud is located on the browser side; The three collinear click points determine the range of the point cloud to be drawn; 3. Calculate the coordinates of the three click points in the 3D scene and convert them to the local coordinate system; according to the projection of the three click points on the ground in the local coordinate system, obtain The rectangular projection area of the point cloud to be drawn on the ground, the 4 planes passing through the 4 sides of the rectangular projection area and perpendicular to the ground are the 4 sections of the point cloud to be drawn; 4. Set the observation target point and calculate the position and Observe the parameters; load and draw the point clouds of the four sections in the point cloud section display window on the browser side. This method can respond in real time to the drawing range of the point cloud section determined by the user by clicking on the point on the browser side, and allows the user to perform three-dimensional rotation operations on the section.
Description
technical field [0001] The invention belongs to the field of displaying three-dimensional point cloud data in photogrammetry, and relates to a method and a system for drawing a three-dimensional point cloud section on a browser end. Background technique [0002] Airborne LiDAR (Light Detection And Ranging, laser radar) is one of the most efficient and fastest-growing large-area surveying and mapping methods in the current surveying and mapping field. By using the laser to emit and receive high-energy laser pulses to measure distance, the GNSS (Global Navigation Satellite System, Global Navigation Satellite System) receiver gives the real-time position of the laser, and the INS (Inertial Navigation System, inertial navigation system) gives the real-time three-dimensional attitude of the laser. The three-dimensional coordinates of the scattering surface can be calculated by vector formula and coordinate conversion. With the help of mechanical scanning device, airborne LiDAR c...
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IPC IPC(8): G06F3/04845G06T19/20G06T17/00
CPCG06F3/04845G06T19/20G06T17/00G06T2219/2016
Inventor 王秋艳郑诚慧杨晓凡夏卉
Owner 飞燕航空遥感技术有限公司