CN110888954A - Plotting method based on electronic chart system - Google Patents
Plotting method based on electronic chart system Download PDFInfo
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- CN110888954A CN110888954A CN201911115876.XA CN201911115876A CN110888954A CN 110888954 A CN110888954 A CN 110888954A CN 201911115876 A CN201911115876 A CN 201911115876A CN 110888954 A CN110888954 A CN 110888954A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
Abstract
The invention belongs to the field of bridges, in particular to a plotting method based on an electronic chart system, which adopts an SQLite database to carry out access management on plotting data, newly builds a plotting layer, names the newly-built plotting layer, edits layer remarks and stores the layer; firstly, selecting a vector type of a plotting object, and then selecting a filling type of the plotting object; selecting the geographical position of the object to be plotted in the current plotting layer on the current chart display interface to finish plotting; repeating the step 2-3 until each object mark of the current image layer is plotted; and 5: after the current layer is plotted, storing the plotting content; moving the plotting object, selecting a moving object function, clicking the plotting object needing to be moved by using a mouse, and directly dragging the plotting object to a target position; deleting the plotting object, selecting the function of the deleting object, and clicking the plotting object needing to be deleted by using a mouse to delete the plotting object.
Description
Technical Field
The invention belongs to the field of bridges, and particularly relates to a plotting method based on an electronic chart system.
Background
The electronic chart display and information system is a real-time ship navigation auxiliary system, can perform centralized processing on chart data, ship position information, radar data, ship dynamic information and other data, and comprehensively displays the chart data, the ship position information, the radar data, the ship dynamic information and the like in a graphic and text mode. The system is defined by international maritime organization performance standards for electronic chart display and information systems, which is first a navigational information system that can selectively display information in electronic charts and obtain location information from navigational sensors to assist sailors in airline design and route monitoring, and can display other navigational-related supplemental information as desired.
The existing plotting method based on the electronic chart system has weak functionality, and the plotting graphic library has larger limitation, cannot meet the plotting requirement of navigation in increasingly complex marine environments, and ensures the comprehensiveness and integrity of navigation information and marine environment information records.
Disclosure of Invention
The invention aims to make up for the defects of the prior art, and provides a plotting method based on an electronic chart system, which follows corresponding technical standards, is based on an electronic chart display interface, has stronger functionality and is convenient for plotting.
The technical scheme adopted by the invention is as follows:
a plotting method based on an electronic chart system is characterized in that: the SQLite database is adopted for carrying out access management on the plotting data, and the method comprises the following steps:
step 1: newly building a plotting layer, naming the newly built plotting layer, editing layer remarks and storing the layer;
step 2: firstly, selecting a vector type of a plotting object, and then selecting a filling type of the plotting object;
and step 3: selecting the geographical position of the object to be plotted in the current plotting layer on the current chart display interface to finish plotting;
and 4, step 4: repeating the step 2-3 until each object mark of the current image layer is plotted;
and 5: after the current layer is plotted, storing the plotting content;
step 6: moving the plotting object, selecting a moving object function, clicking the plotting object needing to be moved by using a mouse, and directly dragging the plotting object to a target position;
and 7: deleting the plotting object, selecting the function of the deleting object, and clicking the plotting object needing to be deleted by using a mouse to delete the plotting object.
Further, in step 2, the vector type of the object used includes a point, a line and a plane, and the filling type of the object includes a color, a shape and a character.
Furthermore, the symbols and line types used in the step 2-3 are all plotted according to S52 electronic chart content and display standard, symbols acquired by IHO official authorities are plotted, and a special symbol library is managed in a configuration file form.
Further, the SQLite database includes a data table for storing all the plot layer information and a plurality of data tables for storing the plot object information.
Further, the plotting layer information comprises layer names, remark information, boundary longitude and latitude, creation time and modification time; the map layer data table names are named by map layer names, and the plotting target object information comprises a target object vector type, a sequence of geographic coordinate points, plotting time, plotting text content, a target object boundary and target object parameter setting.
The invention has the advantages and positive effects that:
in the invention, a new plotting method is established based on the characteristics of the electronic chart on the basis of the SQLite database; the SQLite database has mature technology, small volume, high performance and strong transportability and is suitable for the field of electronic chart; and editing and displaying through a human-computer interaction interface matched with the database, and modifying and storing the standard drawing layer. Drawing the object graph according to the object geographic type, adding customized points, lines and objects in the designated target drawing layer, and moving, modifying or deleting the added objects. The symbols used for plotting and the complex line shapes are those in IHO S-52, which have a special meaning and meet the corresponding standards. The plotting information management and graph drawing module establishes a plotting database, stores the newly-built target plotting layer and the target object into the database and performs data management, and is convenient to operate and high in functionality.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flow chart of the human-computer interaction operation steps of the present invention;
FIG. 3 is a schematic diagram of a storage database structure according to the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The technical scheme adopted by the invention is as follows:
a plotting method based on an electronic chart system is characterized in that: the SQLite database is adopted to carry out the access management of the plotting data, the framework of the SQLite database is shown in figure 1 and comprises a display control module and a bottom library, the display control module is used for building, editing and modifying, the bottom library is additionally used for storing, calling and managing the plotting data, and the plotting process comprises the following steps:
step 1: newly building a plotting layer, naming the newly built plotting layer, editing layer remarks and storing the layer;
in this embodiment, an image layer PlottingLayer is established, and the remark is For Test. The geographic range of the layer is as follows: upper left corner coordinates (39 ° 03.724 'N, 121 ° 37.311' E); coordinates in the upper right corner (39 ° 03.724 'N, 121 ° 57.266' E); lower left corner coordinates (38 ° 53.136 'N, 121 ° 37.311' E); lower right corner coordinates (38 ° 53.136 'N, 121 ° 57.266' E).
Step 2: firstly, selecting a vector type (point, line, surface) of a plotting object, and then selecting a filling type (color, shape and character) of the plotting object;
in this embodiment, a dot object is selected, the shape of the dot object is selected to be circular, and the color is selected to be red.
And step 3: selecting the geographical position of the object to be plotted in the current chart display interface (namely in the current plotting layer) to finish plotting;
in this example, the positions of the plot point objects are: 38 ° 58.576 'N, 121 ° 44.392' E.
And 4, step 4: repeating the step 2-3 until each object mark of the current image layer is plotted;
in this example, one of the objects is selected, and the object boundary line is a broken line in shape and blue in color. After the object marking customization is completed, four vertexes of the object marking are selected by using a mouse in a current chart display interface (namely a current marking drawing layer), and the position coordinates of the four vertexes are respectively as follows: vertex 1(38 ° 57.721 'N, 121 ° 42.591' E), vertex 2(38 ° 56.124 'N, 121 ° 41.493' E), vertex 3(38 ° 56.068 'N, 121 ° 44.735' E), vertex 4(38 ° 57.133 'N, 121 ° 47.959' E).
And 5: after the current layer is plotted, storing the plotting content;
step 6: moving the plotting object, selecting a moving object function, clicking the plotting object needing to be moved by using a mouse, and directly dragging the plotting object to a target position;
in the present embodiment, the circular plot object is moved to the position point: 38 ° 54.286 'N, 121 ° 48.739' E
And 7: deleting the plotting object, selecting the function of the deleting object, and clicking the plotting object needing to be deleted by using a mouse to delete the plotting object.
In this embodiment, the symbols and line types used in the step 2-3 are all plotted according to the content and display standard of the electronic chart of S52, the symbols acquired by the authority IHO are plotted, and the special symbol library is managed in the form of a configuration file.
In this embodiment, the SQLite database includes a data table storing all the plot layer information and a plurality of layer data tables storing the plot target information.
In this embodiment, the plotting layer information includes layer names, remark information, boundary longitude and latitude, creation time, and modification time; the map layer data table names are named by map layer names, and the plotting target object information comprises a target object vector type, a sequence of geographic coordinate points, plotting time, plotting text content, a target object boundary and target object parameter setting.
Claims (5)
1. A plotting method based on an electronic chart system is characterized in that: the SQLite database is adopted for carrying out access management on the plotting data, and the method comprises the following steps:
step 1: newly building a plotting layer, naming the newly built plotting layer, editing layer remarks and storing the layer;
step 2: firstly, selecting a vector type of a plotting object, and then selecting a filling type of the plotting object;
and step 3: selecting the geographical position of the object to be plotted in the current plotting layer on the current chart display interface to finish plotting;
and 4, step 4: repeating the step 2-3 until each object mark of the current image layer is plotted;
and 5: after the current layer is plotted, storing the plotting content;
step 6: moving the plotting object, selecting a moving object function, clicking the plotting object needing to be moved by using a mouse, and directly dragging the plotting object to a target position;
and 7: deleting the plotting object, selecting the function of the deleting object, and clicking the plotting object needing to be deleted by using a mouse to delete the plotting object.
2. A plotting method based on an electronic chart system according to claim 1, characterized in that: in the step 2, the vector type of the object comprises a point, a line and a surface, and the filling type of the object comprises a color, a shape and a character.
3. A plotting method based on an electronic chart system according to claim 1, characterized in that: the symbols and the line type used for plotting in the step 2-3 are all in accordance with S52 electronic chart content and display standards, the symbols acquired by IHO official authorities are plotted, and a special symbol library is managed in a configuration file form.
4. A plotting method based on an electronic chart system according to claim 1, characterized in that: the SQLite database has a data table for storing all the plot layer information and a plurality of layer data tables for storing plot object information.
5. A plotting method based on an electronic chart system according to claim 3, characterized in that: the plotting layer information comprises a layer name, remark information, boundary longitude and latitude, creation time and modification time; the map layer data table names are named by map layer names, and the plotting target object information comprises a target object vector type, a sequence of geographic coordinate points, plotting time, plotting text content, a target object boundary and target object parameter setting.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111459377A (en) * | 2020-03-18 | 2020-07-28 | 北京图创时代科技有限公司武汉分公司 | Vectorization map plotting management system |
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| CN102722854A (en) * | 2012-05-21 | 2012-10-10 | 长江航道局 | Database-based Changjiang river electronic waterway chart production and application method |
| CN102829786A (en) * | 2012-09-17 | 2012-12-19 | 重庆华渝电气仪表总厂 | Method for improving precision of course plotter |
| CN104268145A (en) * | 2014-08-21 | 2015-01-07 | 中国科学院遥感与数字地球研究所 | Quick map drawing method of complex vector data |
| CN104679686A (en) * | 2013-11-29 | 2015-06-03 | 哈尔滨功成科技创业投资有限公司 | FPGA (Field Programmable Gate Array)-based chart plotter drive module |
| CN108681453A (en) * | 2018-05-21 | 2018-10-19 | 京东方科技集团股份有限公司 | The implementation method and device of engine map |
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2019
- 2019-11-14 CN CN201911115876.XA patent/CN110888954A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102722854A (en) * | 2012-05-21 | 2012-10-10 | 长江航道局 | Database-based Changjiang river electronic waterway chart production and application method |
| CN102829786A (en) * | 2012-09-17 | 2012-12-19 | 重庆华渝电气仪表总厂 | Method for improving precision of course plotter |
| CN104679686A (en) * | 2013-11-29 | 2015-06-03 | 哈尔滨功成科技创业投资有限公司 | FPGA (Field Programmable Gate Array)-based chart plotter drive module |
| CN104268145A (en) * | 2014-08-21 | 2015-01-07 | 中国科学院遥感与数字地球研究所 | Quick map drawing method of complex vector data |
| CN108681453A (en) * | 2018-05-21 | 2018-10-19 | 京东方科技集团股份有限公司 | The implementation method and device of engine map |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111459377A (en) * | 2020-03-18 | 2020-07-28 | 北京图创时代科技有限公司武汉分公司 | Vectorization map plotting management system |
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