Drawing method of ship data table based on ais system

A ship data table and ship technology, applied in the field of navigation, can solve problems such as reducing the response speed of computer hardware systems, ship occlusion, and inability to accurately obtain basic ship information, so as to reduce the workload of drawing, improve response speed, and facilitate viewing.

Active Publication Date: 2016-07-06
XIAMEN XINNUO TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

When the chart is at a large scale, if the number of ships is large, the ship data tables will be superimposed on each other and displayed as a clump on the chart, which will cause some ships to be blocked by the ship data tables, and the basic information of the ships cannot be obtained accurately, and at the same time, the computer hardware system will be reduced. response speed

Method used

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  • Drawing method of ship data table based on ais system
  • Drawing method of ship data table based on ais system
  • Drawing method of ship data table based on ais system

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Embodiment Construction

[0025] A method for drawing ship data tables based on the AIS system, the drawing method comprising the steps of:

[0026] Step 1. Determine the display scale of the chart, and then divide the display screen into cells of the same size, each cell is not marked, that is, each cell is not used; the display screen is divided into columns as follows: display Screen width / cell width; the number of rows is: display screen height / cell height;

[0027] Step 2, see figure 2 with image 3 , Receive the ship data through the computer serial port, judge whether the AIS statement of the received ship data is correct, return it if it is not correct, analyze the ship data if it is correct, extract the MMSI number in the ship data, and judge whether the MMSI number exists in the AIS data link list,

[0028] If it already exists, take out the corresponding ship data from the AIS data link list according to the MMSI number for comparison, if there is an update, update the received ship data ...

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Abstract

The invention provides a ship data table drawing method based on an AIS (automatic identification system). The ship data table drawing method based on the AIS comprises the following steps of: firstly dividing a display screen into equal-size cells, recording the received ship data table in an AIS data chain table, extracting the ship data table for drawing, quitting drawing if a cell needed to be occupied by the ship data table is marked, and drawing the ship data table on a nautical chart if the cell needed to be occupied by the ship data table is not marked. By dividing the display screen into cells and by using the cells to filter the ship data tables which are not needed to be drawn, the ship data table drawing method based on the AIS has the advantages that the drawing workload is reduced, the response speed of a computer hardware system is improved, the nautical chart is displayed more clearly, the viewing by users is facilitated and the ship data tables which are not displayed can be queried through an AIS data query table or by selecting ships and zooming the nautical chart.

Description

technical field [0001] The invention relates to the field of navigation, and particularly designs a method for drawing a ship data table based on an AIS system. Background technique [0002] The ship data under the AIS system (full name of AIS: Automatic Identification System; Chinese name: Ship Automatic Identification System) is generally displayed on the chart in the form of ship data table, and the user can observe the surrounding ships and their movements through the chart. The ship data includes: ship's national flag, nationality, ship name, MMSI (Chinese name: Maritime Mobile Communication Service Identification), speed, longitude and latitude of the ship, etc. When displaying the basic information of a ship on the chart, the ship data table is directly displayed on the chart (such as figure 1 shown). When the chart is at a large scale, if the number of ships is large, the ship data tables will be superimposed on each other and displayed as a clump on the chart, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
Inventor 王维
Owner XIAMEN XINNUO TECH
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