Spatial data progressive transmission method and device
A technology of spatial data and transmission method, applied in the direction of image data processing, image data processing, digital output to display devices, etc., can solve the problems of restricting the practical use of progressive transmission of vector data and inability to ensure it.
Active Publication Date: 2016-06-15
SUZHOU SUPERENGINE FOR GRAPHICS & IMASOFTWARE TECH DEV
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Problems solved by technology
Among them, the inability to ensure the correct display of the vector data itself and the spatial relationship between the vector data during the progressive transmission of arbitrarily complex vector data is a key issue that restricts the practicality of vector data progressive transmission
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[0084] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0085] The invention discloses a spatial data progressive transmission method. During the display process of the spatial data, the corresponding actual scene is, since the resolution of the viewing window is limited, when the high-resolution spatial data is displayed on the viewing window , there will be data (coordinate points) that represent the details of the spatial data drawn on the same pixel. At this time, as long as one coordinate point drawn on this pi...
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The invention discloses a method and device for progressive spatial data transmission. The method includes: when sending an incremental data request, the requesting sending end carries the view control parameters of the view window currently to be displayed in the request, and the requesting receiving end receives the request. Request the incremental data request sent by the sender; transform the original coordinates of the original spatial data into the view coordinates of the view window according to the view control parameters; analyze the view coordinates to determine the original spatial data corresponding to the view coordinates that meet the incremental conditions is incremental data; sending the incremental data to the request sending end. In the spatial data progressive transmission method disclosed in the present invention, the request receiving end can analyze and obtain the incremental data displayed in the current view window according to the view control parameters, which ensures that the obtained incremental data can be displayed without loss after data reconstruction at the request sending end , while reducing the amount of data transmission and improving the efficiency of data transmission.
Description
technical field [0001] The invention relates to the fields of spatial information technology, computer graphics and computer operating systems, in particular to a method and device for progressive transmission of spatial data. Background technique [0002] Spatial entities are the abstraction of entities or phenomena that exist or are virtual in the natural world, and are associated with spatial positions or features. They are the smallest unit that cannot be divided in the natural world. The basic spatial entities are points, lines, surfaces, and volumes. types. Spatial data is used to represent the spatial position, shape information and spatial relationship of the spatial entity itself, such as topological relationship and other information. The spatial data structure is divided into vector data structure and raster data structure. The vector data structure uses spatial discrete point coordinates to describe the space Entity, which regards the entire space studied as a s...
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IPC IPC(8): G06F3/14
CPCG06T1/00
Inventor 董福田
Owner SUZHOU SUPERENGINE FOR GRAPHICS & IMASOFTWARE TECH DEV