A Symbol Library Based on 3D Plotting System

A symbol and plotting technology, applied in the field of symbol library, can solve problems such as poor scalability, difficulty in symbol library implementation, long development cycle, etc., and achieve the effect of reducing complexity and facilitating dynamic expansion

Active Publication Date: 2022-07-19
中国科学院电子学研究所苏州研究院
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The current 3D plotting system usually customizes the corresponding generation algorithm according to each symbol included in the symbol library. Each new symbol needs to be processed by professionals, which makes the realization of the symbol library difficult. Long cycle and poor scalability

Method used

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  • A Symbol Library Based on 3D Plotting System
  • A Symbol Library Based on 3D Plotting System

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Embodiment

[0026] In order to verify the effectiveness of the solution of the present invention, the following simulation experiments are carried out, taking the point symbol "port" as an example, to fully describe the specific process of the symbol library from receiving user input to completing rendering.

[0027] Step 1. The user initiates a request to the symbol library through the unique identifier 10200 of the point symbol "port", and the three-dimensional plotting system obtains the geographic coordinates GeoP=(122,22) selected by the user by monitoring the mouse event. Parameters passed to the vertex generator.

[0028] Step 2: The vertex generator searches the symbol information base to obtain basic information such as symbol type, initial attribute and instruction set index according to the unique identifier of the symbol.

[0029] Step 3. The vertex generator obtains the control point description instruction and the primitive description instruction through the instruction set...

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Abstract

The invention discloses a symbol library based on a three-dimensional plotting system, comprising a symbol description unit and a symbol generation unit, wherein the symbol description unit includes a symbol information library, a control point description instruction set and a graphic element description instruction set; the symbol generation unit The unit includes basic operation module, basic primitive algorithm library, vertex generator and vertex rendering module. The invention separates the symbol generation algorithm and the symbol description, and can conveniently construct the custom symbol according to the symbol description specification, thereby reducing the complexity of creating the custom symbol.

Description

technical field [0001] The invention relates to a plotting technology, in particular to a symbol library based on a three-dimensional plotting system. Background technique [0002] As an important part of geographic information system, 3D plotting system is widely used in various professional fields. In the past two decades, the 3D plotting system has made breakthroughs in label normalization, vectorized drawing, and automatic plotting, which cannot be separated from the support of the symbol library. [0003] In the three-dimensional plotting system, symbols can be divided into point symbols and line symbols. The point symbol refers to a regular symbol whose basic shape and the proportional relationship of each part remain unchanged. It has an anchor point and is used to precisely locate the map position. A line symbol is an irregular symbol whose basic shape changes as the control points change. Complex line symbols usually require multiple control points to meet the dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/51
CPCG06F16/51
Inventor 李佳航付琨廉海明王毅俞信林清钊彭熊清
Owner 中国科学院电子学研究所苏州研究院
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