CN109448539B - Multi-beam tone scale map drawing method based on QT framework - Google Patents
Multi-beam tone scale map drawing method based on QT framework Download PDFInfo
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Abstract
The invention discloses a multi-beam tone gradation drawing method based on a QT frame, which adopts high-precision three-dimensional space measurement technology calculation and layer splicing technology processing, a client introduces multi-beam data according to a map position, calculates and constructs regular triangles by using X, Y values in a three-coordinate solid geometric space according to longitude and latitude and topographic water depth data in the multi-beam tone gradation drawing method, sorts the regular triangles by using longitude and latitude points in the three-dimensional space, uses a traversing technology in java, traverses each group into a two-dimensional array in the three-dimensional space, namely X, Y values, calculates a plurality of regular triangles in a traversing manner, traverses all arrays again to find the minimum distance of the arrays, sequentially splices the arrays, and finally forms a multi-beam layer. The invention reduces the dependence degree of the two-dimensional plane map drawing on the map scale and the limitation of the space axis direction, and realizes the universality of the equipment; the method is fast to realize and easy to understand, can be used on limited hardware support, reduces the dependence on the graphics card GPU, and is suitable for various graphics card types.
Description
Technical Field
The invention relates to the technical field of map drawing, in particular to a multi-beam tone scale map drawing method based on a QT frame.
Background
Since the beginning of the 90 s of the 20 th century, the national attention on ocean resources is increasing, and under the condition that the management demand of ocean peripheral resources is increasing, the task of constructing submarine cables is highlighted, and the construction and management of submarine cables surrounding the wide sea area of the south China sea are the first task in the present stage, so that the submarine topography data of the south China sea are combined as the basis, and various exploration information such as submarine ground objects, submarine cable routes, environments and the like are fused, and the submarine cable is laid up by being closer to the actual condition. To meet the needs of offshore channels, oceanic surveys and continental-shelf surveys, and submarine cable laying, a number of multi-beam sounding systems have been introduced. After the 21 st century, the old multi-beam sounding system can not meet the requirements of the new century, the multi-beam new technology is introduced, the multi-beam system with high precision, high coverage and high beam number is applied, on the basis, the new multi-beam sounding technology is adopted, the underwater topography can be effectively detected, high-precision three-dimensional topographic map information is obtained, the multi-beam color gradation map graph is displayed by combining a three-dimensional geometrical algorithm of a three-dimensional space, and the seabed environment is further mastered in real time.
If multi-beam sounding technology exploration is carried out in actual construction, multi-beam sounding data are collected in real time, construction and management of submarine cables are carried out, unnecessary labor and material resources are wasted, time waste under the influence of natural environment factors needs to be considered, and cost is increased. The method for realizing the multi-beam color gradation graph by using the client interface operation has the advantages that the terrain environment is predicted in advance, the construction efficiency is improved, the risk is reduced, and the cost is reduced.
The prior art (CN107895392A) discloses a time map drawing method, which relates to the map drawing field; the method comprises the following steps: s1: the method comprises the steps of collecting the position information of the geographic point in a drawing area, selecting the area range to be drawn, determining the geographic point required to be displayed on a map in the area, and collecting the position information of the displayed geographic point, wherein the collection mode can call a Baidu map API to read the geographic position information in a database, or adopt related data provided by a national geographic basic information center. Compared with the prior art, the invention realizes the core function of the time map, namely the passing time of any two points in the drawing area is read, and when a user uses the time map, the relative position relation between the geographical points and the geographical points can be seen, and the passing distance between the geographical points can be read according to the scale. However, the above prior art still has the problems of dependence on map scale and limitation of spatial axis direction; when the method is applied to drawing the submarine geomorphologic form, the submarine geomorphologic form cannot be quickly and conveniently reflected, so that the understanding is difficult, and the method cannot be used on limited hardware support.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a multi-beam tone scale map drawing method based on a QT frame, which utilizes high-precision three-dimensional space measurement technology calculation and layer splicing technology processing to reduce the dependence degree of two-dimensional plane map drawing on map scale and the limitation of spatial axis direction, thereby achieving device universality.
Another object of the present invention is to provide a multi-beam tone mapping method based on the QT framework, which is fast and easy to understand, improves the utilization efficiency of software functions, imports data information, directly displays a multi-beam pattern on a client interface, occupies a small hardware system display card CPU, has a small memory, and has a fast operating speed. The method can be used on limited hardware support, reduces the dependence on graphics card GPUs, and is suitable for multiple graphics card types (such as AMD (ATI) graphics cards, NVIDIA graphics cards and Inter built-in graphics cards).
In order to achieve the above object, the technical solution of the present invention is as follows.
The invention provides a multi-beam tone scale map drawing method based on a QT frame, which comprises the following steps of:
the method comprises the following steps: the client side collects data: a client acquires map data; the map data includes longitude, latitude, and altitude data;
step two: drawing a multi-beam tone scale chart: automatically drawing a multi-beam tone scale chart according to the acquired data, and the specific steps are as follows:
a. x, Y, Z data points are obtained through multi-beam data in a three-coordinate solid geometric space, a group of two-dimensional arrays are obtained through the data points X, Y, and a front triangle and a back triangle are constructed through the two-dimensional data; in the three-coordinate solid geometric space, an X axis is a longitude value, a Y axis is a latitude value, and a Z axis is a height value;
b. through the sorting of longitude and latitude points, each group is traversed into a two-dimensional array in a three-dimensional space, namely X, Y values, by using the traversing technology in java, and a plurality of positive and negative triangles are calculated through traversing;
c. and after all data are traversed and drawn to form the positive triangle and the negative triangle, all data are traversed and listed to obtain the minimum interval numerical value of comparison of the X value and the Y value in all data, the minimum distance of the array is found, all data are spliced in sequence, and finally the multi-beam image layer is formed.
According to the method, a client side introduces multi-beam data according to a map position, calculates and constructs a regular triangle by using X, Y values in a three-dimensional geometrical space according to longitude and latitude and topographic water depth data in the map position, sequences through longitude and latitude points in the three-dimensional space, uses an ergodic technology in java, traverses each group into a two-dimensional array, namely X, Y values, in the three-dimensional space, calculates a plurality of regular triangles in an ergodic way, traverses all arrays again to find the minimum distance of the arrays, sequentially splices the arrays, and finally forms a multi-beam image layer. The multi-beam color gradation graph is drawn by using the high-precision three-dimensional space measurement technology for calculation and combining with the layer splicing technology, so that the method is easy to understand, the dependence degree of two-dimensional plane graph drawing on map proportion and the limitation of the space axis direction can be reduced, the universality of equipment is realized, and the submarine landform form can be well shown; in addition, the method can be realized quickly, can be used on limited hardware support, reduces the dependence on a graphics card GPU, and is suitable for various graphics card types. Wherein, the traversing technology in java is the prior art; in step c, sorting the imported data list by X values (or Y values) through code calculation processing in a three-dimensional coordinate solid geometry space, and traversing the list to obtain the minimum interval value of the X values and the Y values.
Specifically, the method further comprises the third step of: according to the Z value in each group of data in the three-dimensional coordinate solid geometry, the water depth value is calculated according to the depth equal ratio, and the color is marked in the multi-beam color gradation graph, wherein the deep part is blue, and the light part is red. The marking color can more intuitively obtain the water depth degree of the sea area, and the exploration is convenient.
Specifically, the method further comprises the fourth step of: the display of the multi-beam tone scale map is checked and confirmed to be completed on the map interface of the client, whether the multi-beam tone scale map obtained by drawing meets the requirements or not can be checked, and the multi-beam tone scale map with high quality can be obtained by drawing.
Specifically, the step a specifically includes the following steps:
a1, uploading multi-beam data: the multi-beam data comprises a plurality of sets of data, and a longitude value, a latitude value and a height value exist in each set of data;
a2, displaying multi-beam data in three-dimensional coordinates: drawing in a three-dimensional coordinate solid geometric space according to each corresponding group of data values, and displaying multi-beam data in the three-dimensional coordinate solid geometric space; wherein, X axis is longitude value, Y axis is latitude value, Z axis is height value;
a3, constructing a positive triangle: the method comprises the steps that 2 groups of data of the beginning are obtained through multi-beam data in a three-coordinate solid geometric space, X, Y, Z data points exist in each group of data, X, Y data points are expressed in a two-dimensional array form, three-dimensional axis coordinates are simulated in the three-dimensional space through two-dimensional data and the height value of a Z point, corresponding data point data are recorded in the axis coordinates, the values of the X point, the Y point and the Z point need to be processed in an equidistance mode on three sides, 3 data points are connected into a line, and a positive triangle and a negative triangle are constructed.
Specifically, the step b specifically includes the following steps: data points X, Y, Z in three-dimensional axial coordinates of the three-dimensional space simulation are connected into a line and displayed in the shape of a positive triangle and a negative triangle, each array in the collected data is sequentially traversed and calculated, and every two arrays form a plurality of positive triangles and negative triangles.
Specifically, in the step c, the minimum interval numerical values of the X value and the Y value are respectively a minimum longitude value and a minimum latitude value; the minimum warp and weft values are denoted minIncX and minIncY, respectively.
Specifically, the other two points of the regular triangle are (X + mininconx, Y, Z), (X, Y + minincony, Z); the other two points of the inverse triangle are (X-minIncX, Y, Z), (X, Y-minIncY, Z).
Specifically, the other two points of the regular triangle and the inverse triangle need to be within the list data range, and the error does not exceed 1 unit. And the drawing accuracy is improved.
Specifically, the step of marking colors in the multi-beam tone scale map comprises: and performing equal ratio value between the darkest color and the lightest color according to the height value, and filling colors into the triangle.
In the invention, the method imports data information, directly displays the multi-beam graphics on a client interface, occupies a small hardware system display card CPU, has less memory and high running speed, can be used on limited hardware support, reduces the dependence on a display card GPU, and is suitable for display cards of various display card types (such as AMD (ATI), NVIDIA display cards and Inter built-in display cards).
The invention has the advantages that: compared with the prior art, the multi-beam tone scale map drawing method based on the QT frame is used, the multi-beam tone scale map is drawn by using the high-precision three-dimensional space measurement technology and combining the layer splicing technology, the dependence degree of two-dimensional plane map drawing on map scale and the limitation of the space axis direction can be reduced, and the equipment universality is realized; the method for drawing the multi-beam color gradation graph by using the combination of the three-dimensional space measurement technology and the layer splicing technology can be used for rapidly and easily understanding, occupies a small hardware system display card CPU, has less memory and high operation speed, can be used on limited hardware support, reduces the dependence on a display card GPU, and is suitable for display cards of various display card types (such as AMD (ATI), NVIDIA display cards and Inter built-in display cards).
Drawings
FIG. 1 is a drawing flow chart of a multi-beam tone scale chart drawing method based on a QT frame according to the invention.
Fig. 2 is a multi-beam tone scale chart drawn by the multi-beam tone scale chart drawing method based on the QT framework of the present invention.
FIG. 3 is operation information of importing multi-beam data by the multi-beam tone mapping method based on the QT framework according to the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to achieve the above object, the technical solution of the present invention is as follows.
Referring to fig. 1-3, the invention provides a multi-beam tone mapping method based on a QT framework, comprising the following steps:
the method comprises the following steps: the client side collects data: a client acquires map data; the map data includes longitude, latitude, and altitude data;
step two: drawing a multi-beam tone scale chart: automatically drawing a multi-beam tone scale chart according to the acquired data, and the specific steps are as follows:
a. x, Y, Z data points are obtained through multi-beam data in a three-coordinate solid geometric space, a group of two-dimensional arrays are obtained through the data points X, Y, and a front triangle and a back triangle are constructed through the two-dimensional data; in the three-dimensional geometrical space, the X axis is a longitude value, the Y axis is a latitude value, and the Z axis is a height value.
The step a specifically comprises the following steps:
a1, uploading multi-beam data: the multi-beam data comprises a plurality of sets of data, and a longitude value, a latitude value and a height value exist in each set of data;
a2, displaying multi-beam data in three-dimensional coordinates: drawing according to each corresponding group of data values in a three-dimensional coordinate solid geometric space (the X axis is a longitude value, the Y axis is a latitude value, and the Z axis is a height), and displaying the multi-beam data in the three-dimensional coordinate solid geometric space;
a3, constructing a positive triangle: the method comprises the steps that 2 groups of data of the beginning are obtained through multi-beam data in a three-coordinate solid geometric space, X, Y, Z data points exist in each group of data, X, Y data points are expressed in a two-dimensional array form, three-dimensional axis coordinates are simulated in the three-dimensional space through two-dimensional data and the height value of a Z point, corresponding data point data are recorded in the axis coordinates, the values of the X point, the Y point and the Z point need to be processed in an equidistance mode on three sides, 3 data points are connected into a line, and a positive triangle and a negative triangle are constructed.
b. Through the sorting of longitude and latitude points, each group is traversed into a two-dimensional array in a three-dimensional space, namely X, Y values, by using the traversing technology in java, and a plurality of positive and negative triangles are calculated through traversing;
c. after all data traverse drawing positive and negative triangles is completed, all data traverse lists are obtained, the interval numerical value with the minimum comparison of X values and Y values in all data is obtained, the minimum distance of an array is found, all data are spliced in sequence, and finally a multi-beam image layer is formed; the minimum interval numerical values of the X value and the Y value are respectively a minimum longitude value and a minimum latitude value; the minimum warp and weft values are denoted minIncX and minIncY, respectively.
In the invention, a multi-beam color gradation graph is drawn by using a high-precision three-dimensional space measurement technology to calculate and combining with a graph layer splicing technology, so that the dependence degree of two-dimensional plane graph drawing on a map scale and the limitation of a space axis direction can be reduced, and the universality of equipment is realized; the method can well display the submarine landform form, and the method for drawing the multi-beam color gradation graph by using the combination of the three-dimensional space measurement technology and the layer splicing technology can be fast and easily understood, can be used on limited hardware support, reduces the dependence on a graphics card GPU and is suitable for various graphics card types. Wherein, the traversing technology in java is the prior art; in step c, sorting the imported data list by X values (or Y values) through code calculation processing in a three-dimensional coordinate solid geometry space, and traversing the list to obtain the minimum interval value of the X values and the Y values.
In this embodiment, the method further includes the third step: according to the Z value in each group of data in the three-dimensional coordinate solid geometry, the water depth value is calculated according to the depth equal ratio, and the color is marked in the multi-beam color gradation graph, wherein the deep part is blue, and the light part is red. The marking color can more intuitively obtain the water depth degree of the sea area, and the exploration is convenient.
In this embodiment, the method further includes the fourth step: the display of the multi-beam tone scale map is checked and confirmed to be completed on the map interface of the client, whether the multi-beam tone scale map obtained by drawing meets the requirements or not can be checked, and the multi-beam tone scale map with high quality can be obtained by drawing.
In this embodiment, the specific step of marking colors in the multi-beam tone scale map includes: and performing equal ratio value between the darkest color and the lightest color according to the height value, and filling colors into the triangle.
In the embodiment, the step b specifically comprises the following steps of connecting data points of X, Y, Z in three-dimensional axial coordinates of the three-dimensional space simulation into a line to display the line in the shape of a positive triangle and a negative triangle, sequentially traversing and calculating each array in the acquired data, and forming a plurality of positive triangles and negative triangles by two arrays.
In this example, the other two points of the regular triangle are (X + minIncX, Y, Z), (X, Y + minIncY, Z); the other two points of the inverse triangle are (X-minIncX, Y, Z), (X, Y-minIncY, Z).
In this embodiment, the other two points of the regular triangle and the inverse triangle are required to be within the list data range, and the error is not more than 1 unit. And the drawing accuracy is improved.
In the invention, the method imports data information, directly displays the multi-beam graphics on a client interface, occupies a small hardware system display card CPU, has less memory and high running speed, can be used on limited hardware support, reduces the dependence on a display card GPU, and is suitable for display cards of various display card types (such as AMD (ATI), NVIDIA display cards and Inter built-in display cards).
The invention has the advantages that: compared with the prior art, the multi-beam tone scale map drawing method based on the QT frame is used, the multi-beam tone scale map is drawn by using the high-precision three-dimensional space measurement technology and combining the layer splicing technology, the dependence degree of two-dimensional plane map drawing on map scale and the limitation of the space axis direction can be reduced, and the equipment universality is realized; the method can well display the submarine landform form, and the method for drawing the multi-beam color gradation graph by using the combination of the three-dimensional space measurement technology and the layer splicing technology can be fast and easily understood, can be used on limited hardware support, reduces the dependence on a graphics card GPU and is suitable for various graphics card types. Wherein, the traversal technology in java is the prior art.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A multi-beam tone scale map drawing method based on a QT frame is characterized by comprising the following steps:
the method comprises the following steps: the client side collects data: a client acquires map data; the map data includes longitude, latitude, and altitude data;
step two: drawing a multi-beam tone scale chart: automatically drawing a multi-beam tone scale chart according to the acquired data, and the specific steps are as follows:
a. x, Y, Z data points are obtained through multi-beam data in a three-coordinate solid geometric space, a group of two-dimensional arrays are obtained through the data points X, Y, and a front triangle and a back triangle are constructed through the two-dimensional data; in the three-coordinate solid geometric space, an X axis is a longitude value, a Y axis is a latitude value, and a Z axis is a height value;
b. through the sorting of longitude and latitude points, each group is traversed into a two-dimensional array in a three-dimensional space, namely X, Y values, by using the traversing technology in java, and a plurality of positive and negative triangles are calculated through traversing;
c. after all data traverse drawing positive and negative triangles is completed, all data traverse lists are obtained, the interval numerical value with the minimum comparison of X values and Y values in all data is obtained, the minimum distance of an array is found, all data are spliced in sequence, and finally a multi-beam image layer is formed;
the step a specifically comprises the following steps:
a1, uploading multi-beam data: the multi-beam data comprises a plurality of sets of data, and a longitude value, a latitude value and a height value exist in each set of data;
a2, displaying multi-beam data in three-dimensional coordinates: drawing according to each corresponding group of data values in a three-dimensional coordinate solid geometric space, and correspondingly displaying the multi-beam data in a three-dimensional axis coordinate of the three-dimensional coordinate solid geometric space;
a3, constructing a positive triangle: obtaining 2 groups of data of the beginning in a three-coordinate solid geometric space through multi-beam data, wherein X, Y, Z data points exist in each group of data, X, Y data points are expressed in a two-dimensional array form, three-dimensional axis coordinates are simulated in the three-dimensional space through two-dimensional data and the height value of a Z point, corresponding data point data are recorded in the axis coordinates, the values of the X point, the Y point and the Z point need to be processed at equal distance from three sides, and 3 data points are connected into a line to construct a positive triangle and a negative triangle;
in the step c, the minimum interval numerical values of the X value and the Y value are respectively a minimum longitude value and a minimum latitude value; the minimum warp and weft values are denoted minIncX and minIncY, respectively; the other two points of the regular triangle are (X + minIncX, Y, Z), (X, Y + minIncY, Z)); the other two points of the inverse triangle are (X-minIncX, Y, Z), (X, Y-minIncY, Z);
the other two points of the regular triangle and the inverse triangle are required to be within the list data range, and the error is not more than 1 unit.
2. The QT frame-based multi-beam tone mapping method of claim 1, further comprising the steps of three: according to the Z value in each group of data in the three-dimensional coordinate solid geometry, the water depth value is calculated according to the depth equal ratio, and the color is marked in the multi-beam color gradation graph, wherein the deep part is blue, and the light part is red.
3. The QT frame-based multi-beam tone mapping method of claim 2, further comprising the fourth step of: and checking the display of the multi-beam tone scale map on a map interface of the client and confirming the completion.
4. The QT frame-based multi-beam tone mapping method of claim 1, wherein the step b specifically comprises the following steps: data points X, Y, Z in three-dimensional axial coordinates of the three-dimensional space simulation are connected into a line and displayed in the shape of a positive triangle and a negative triangle, each array in the collected data is sequentially traversed and calculated, and every two arrays form a plurality of positive triangles and negative triangles.
5. The QT frame-based multi-beam tone scale map rendering method of claim 2, wherein the specific step of marking colors in the multi-beam tone scale map comprises: and performing equal ratio value between the darkest color and the lightest color according to the height value, and filling colors into the triangle.
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| CN102136039A (en) * | 2011-03-30 | 2011-07-27 | 保定市大为计算机软件开发有限公司 | Method and equipment for establishing map model |
| CN106649466A (en) * | 2016-09-27 | 2017-05-10 | 西安电子科技大学 | Method for obtaining geometrical parameters of typical terrains in digital map |
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| CN102446367B (en) * | 2011-09-19 | 2013-03-13 | 哈尔滨工程大学 | Method for constructing three-dimensional terrain vector model based on multi-beam sonar submarine measurement data |
| CN103344954B (en) * | 2013-07-08 | 2014-07-02 | 国家海洋局第二海洋研究所 | Submarine topography construction method based on multi-source water depth data fusion |
| CN103400405B (en) * | 2013-08-01 | 2014-06-11 | 国家海洋局第二海洋研究所 | Multi-beam bathymetric chart construction method based on seabed digital depth model feature extraction |
| KR101772220B1 (en) * | 2016-05-27 | 2017-08-28 | 한국과학기술원 | Calibration method to estimate relative position between a multi-beam sonar and a camera |
| CN107895392B (en) * | 2017-11-21 | 2021-09-07 | 许沛茹 | Time map drawing method |
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| CN106649466A (en) * | 2016-09-27 | 2017-05-10 | 西安电子科技大学 | Method for obtaining geometrical parameters of typical terrains in digital map |
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