CN115687499A - Global spectrum mapping design and implementation system - Google Patents
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Abstract
The invention relates to the technical field of electromagnetic spectrum data visualization, and provides a global spectrum mapping design and implementation system. The system comprises: the data source module is used for acquiring global spectrum mapping data and storing the global spectrum mapping data to a database; the data service processing module is used for preprocessing the global spectrum mapping data through data reading, service operation and data transmission to obtain preprocessed global spectrum mapping data, rendering and drawing the preprocessed global spectrum mapping data, and transmitting the rendered global spectrum mapping data to the data display module; and the data display module is used for converting the rendered and drawn global spectrum mapping data into a screen view form for display through logic control, man-machine interaction and visual display. The invention realizes the multi-scale unified modeling of the data and realizes the multi-dimensional, multi-view and multi-scale expression of the global spectrum mapping data.
Description
Technical Field
The invention relates to the technical field of electromagnetic spectrum data visualization, in particular to a global spectrum mapping design and implementation system.
Background
At present, the general survey of the global spectrum resource condition, the drawing of global spectrum mapping, and the correct understanding and comprehension of electromagnetic space are the primary links for utilizing and controlling spectrum resources. There have been many research progresses on the visualization of the spectrum data, but the global spectrum mapping data has the following new problems compared with the previous research: the method has the advantages that the data volume is large, global spectrum resources cannot be continuously mapped by relying on a spectrum monitoring satellite, massive spectrum mapping data in a specific frequency band can be obtained, and the characteristics of massive spectrum, high growth rate and diversification are presented; secondly, the data steady state and dynamic state, centralization and dispersion are difficult to unify, the frequency spectrum mapping data has long-term steady state and regular variability in a time domain, and the frequency spectrum resource distribution range is distributed all over the world but relatively concentrated in a certain area in a space domain.
Therefore, it is necessary to re-recognize and understand the global spectrum mapping data, and to research the global spectrum mapping data by using a suitable data organization method and a visual expression method.
Disclosure of Invention
In view of the above, the present invention provides a global spectrum mapping design and implementation method, so as to solve the technical problems in the prior art that massive, high growth rate and diversification are difficult to organize data, and steady and dynamic data, and unified centralized and dispersed phases are difficult to visually express.
The invention provides a global frequency spectrum mapping design and realization system, comprising:
a data source module, a data service processing module and a data display module,
the data source module is used for acquiring global spectrum mapping data and storing the global spectrum mapping data to a database;
the data service processing module is used for preprocessing the global spectrum mapping data through data reading, service operation and data transmission to obtain preprocessed global spectrum mapping data, rendering and drawing the preprocessed global spectrum mapping data, and transmitting the rendered global spectrum mapping data to the data display module;
and the data display module is used for converting the rendered and drawn global spectrum mapping data into a screen view form for display through logic control, man-machine interaction and visual display.
Further, the data source module includes a definition data unit and an access data unit,
the defining data unit is used for defining a global spectrum mapping data source, a data format and a data interface;
the access data unit is used for accessing the global spectrum mapping data through the data interface to obtain dynamic perception of spectrum situation.
Further, the data service processing module includes: a preprocessing unit, a business operation unit and a visual view drawing unit,
the preprocessing unit is used for preprocessing the global spectrum mapping data through data transmission, data sorting and data normalization to obtain the processed global spectrum mapping data;
the business operation unit is used for transmitting the processed global frequency spectrum mapping data to the visual view drawing unit based on corresponding business operation;
and the visual view drawing unit is used for rendering and drawing the processed global spectrum mapping data to obtain the rendered and drawn global spectrum mapping data.
Further, the service operation unit includes: a global spectrum mapping thermodynamic diagram subunit, a global radiation source distribution subgraph subunit, a radar three-dimensional coverage area subgraph subunit, a regional electromagnetic three-dimensional subdivision subgraph subunit and a multidimensional electromagnetic situation visual analysis subgraph subunit,
the global spectrum mapping thermodynamic diagram subunit is used for displaying the global spectrum mapping thermodynamic diagram according to sampling rules based on reading the spatial domain information and the energy domain information of the global spectrum mapping data;
the global radiation source distribution subgraph subunit is used for determining a subdivision grid where the radiation source is located according to a positioning result of the radiation source based on reading the information of a space domain, an energy domain and a frequency domain of global frequency spectrum mapping data, and displaying a global radiation source distribution subgraph;
the radar three-dimensional coverage area subgraph subunit is used for searching an isosurface by adopting a moving cube algorithm and combining a subdivision grid based on reading the information of a space domain, an energy domain and a frequency domain of the global spectrum mapping data, determining that the preprocessed global spectrum mapping data corresponds to the grid under the grid level, and displaying a radar three-dimensional coverage area subgraph;
the regional electromagnetic three-dimensional subdivision sub-unit is used for determining a grid level to be drawn based on energy domain and airspace information of the read global spectrum mapping data and displaying a regional electromagnetic three-dimensional subdivision sub-graph;
and the multidimensional electromagnetic situation visual analysis subgraph subunit is used for displaying the multidimensional electromagnetic situation visual analysis subgraph based on reading time domain, space domain, energy domain and frequency domain information of global spectrum mapping data.
Further, the sampling rule includes:
a. determining the sampling granularity of global spectrum mapping data, and assuming that the distance distribution of the global spectrum mapping data in the longitude and latitude three dimensions is as follows: if the longitude interval is Δ lon, the latitude interval is Δ lat, and the altitude interval is Δ h, the sampling granularity of the global spectrum mapping data is the minimum value of the longitude interval, the latitude interval and the altitude interval, that is, δ = min (Δ lon, Δ lat, Δ h) is adopted to determine the sampling granularity of the global spectrum mapping data;
b. determining a network corresponding hierarchy, and determining the network corresponding hierarchy according to a hierarchy corresponding rule based on the sampling granularity of the global spectrum mapping data, wherein the hierarchy corresponding rule comprises:
rule 2. If the subdivision granularity of the nth level is smaller than or equal to the sampling granularity, namely the minimum size (N + 1) of the three is larger than or equal to delta and smaller than or equal to size (N), then N = N +1;
wherein, size (N) represents subdivision granularity under the nth level, and N represents a subdivision network level;
c. calculating a corresponding subdivision grid according to the longitude and latitude height acquired by the global spectrum mapping data, and mapping the attribute of the sampling point to a grid coordinate to determine the grid position when the longitude and latitude height of the sampling point falls into the coordinate range of the subdivision grid in a set range;
d. and carrying out interpolation processing on the grids lacking data.
Further, the moving cube algorithm specifically comprises the following steps:
step1: an initial subdivision level L is determined, the data cube is traversed under the level, the vertex is marked, the equivalent surface is marked as '0', and the equivalent surface is marked as '1' if the equivalent surface is not marked.
step2: and judging whether the vertex mark under the hierarchy is '0', if so, continuing to divide the mesh downwards, and otherwise, stopping dividing.
step3: and (5) continuing the steps 1 and 2 until the grids of all the isosurface are found under the required hierarchical grid.
Further, the visualization view rendering unit includes a determine grid subunit, a piecewise function subunit, a render visualization subunit, and a change size visualization subunit,
the grid determining subunit determines the spatial position of the grid in the scene according to the central coordinates of the subdivision grid obtained by calculation;
the piecewise function subunit maps the field intensity data from small to large into gradual change from red to blue by adopting a piecewise function method and a color mapping scheme according to the change rule of the data, and obtains the gradual change from red to green of the color according to the change of the field intensity value from large to small;
the drawing visualization subunit is used for realizing the visual display of the frequency spectrum mapping data in the three-dimensional earth scene by combining the geospatial data in the system;
the dimension changing visualization subunit is used for changing the dimension during visualization by changing the hierarchy of the subdivision grid, so that multi-dimension visualization display of the frequency spectrum mapping data is realized.
Further, the color mapping scheme includes the expression:
wherein E represents the energy domain value, emax represents the maximum value of the energy domain, emin represents the minimum value of the energy domain, R (E), G (E) and B (E) represent the red, green and blue components of the color block, A (E) represents the transparency of the color block
Further, the data presentation module comprises: a logic control unit, a man-machine interaction unit and a visual display unit,
the logic control unit is used for carrying out logic control on the whole system interface;
the human-computer interaction unit is used for judging the input states and contents of a keyboard and a mouse and transmitting the input states and contents to the data service processing module for processing;
and the visual display unit is used for converting the rendered and drawn global spectrum mapping data into a screen view for presentation in the three-dimensional earth scene.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, by judging the data sampling granularity, multi-scale unified modeling of data is realized;
2. the invention realizes the multi-dimensional, multi-view and multi-scale expression of the global spectrum mapping data by a multi-view expression method.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a global spectral plot design and implementation system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a global spectrum mapping design and implementation system according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
A global spectrum map design and implementation system according to the present invention is described in detail below with reference to the accompanying drawings.
FIG. 1 is a block diagram of a global spectrum map design and implementation system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a global spectrum map design and implementation system according to an embodiment of the present invention;
as shown in fig. 1, the system includes:
a data source module, a data service processing module and a data display module,
the data source module is used for acquiring global spectrum mapping data and storing the global spectrum mapping data to a database;
the data source module receives global spectrum mapping data uniformly through a defined data interface.
The data source module comprises definition data units and access data units,
the defining data unit is used for defining a global spectrum mapping data source, a data format and a data interface;
the access data unit is used for accessing the global spectrum mapping data through the data interface to obtain dynamic perception of spectrum situation.
The data source module receives and stores global spectrum mapping data in an excel format to a database. The global spectrum mapping data source, the format of the data and the related data interface are defined, data support service is provided for system operation, and the dynamic sensing of the spectrum situation is realized by accessing the global spectrum monitoring data through the data interface. The database is mainly used for storing various data resources, and specifically comprises a geospatial database (specifically comprising geographic elevation data, geographic image data, administrative region division and the like), a global radiation source characteristic and attribute database (specifically comprising spatial position coordinates, frequency bands, power, duration and the like), a business service database (specifically comprising radio regulation policies and the like), a spectrum resource database, and can store historical spectrum monitoring data to construct a historical database. In addition, the data source module is also used for storing the process data generated in the operation of the system.
The data service processing module is used for preprocessing the global spectrum mapping data through data reading, service operation and data transmission to obtain preprocessed global spectrum mapping data, rendering and drawing the preprocessed global spectrum mapping data, and transmitting the rendered global spectrum mapping data to the data display module;
the different processing according to the display requirement comprises: three steps of data reading, business operation and data transmission, different business operation processes are adopted according to different visual display contents,
the data service processing module comprises: a preprocessing unit, a business operation unit and a visual view drawing unit,
the preprocessing unit is used for preprocessing the global spectrum mapping data through data transmission, data sorting and data normalization to obtain the processed global spectrum mapping data;
the business operation unit is used for transmitting the processed global frequency spectrum mapping data to the visual view drawing unit based on corresponding business operation;
the service arithmetic unit includes: a global spectrum mapping thermodynamic diagram subunit, a global radiation source distribution subgraph subunit, a radar three-dimensional coverage area subgraph subunit, a regional electromagnetic three-dimensional subdivision subgraph subunit and a multidimensional electromagnetic situation visual analysis subgraph subunit,
the global spectrum mapping thermodynamic diagram subunit is configured to, based on reading spatial domain information and energy domain information of the global spectrum mapping data, correspond the global spectrum mapping data to subdivision according to grids according to the spatial domain information according to a sampling rule, obtain first grid corresponding data, transmit the first grid corresponding data to the visual drawing unit, render and draw, and then display the global spectrum mapping thermodynamic diagram;
wherein the sampling rule comprises:
a. determining the sampling granularity of global spectrum mapping data, and assuming that the distance distribution of the global spectrum mapping data in the longitude and latitude three dimensions is as follows: if the longitude interval is Δ lon, the latitude interval is Δ lat, and the altitude interval is Δ h, the sampling granularity of the global spectrum mapping data is the minimum value of the longitude interval, the latitude interval and the altitude interval, that is, δ = min (Δ lon, Δ lat, Δ h) is adopted to determine the sampling granularity of the global spectrum mapping data;
b. determining a network corresponding hierarchy, and determining the network corresponding hierarchy according to a hierarchy corresponding rule based on the sampling granularity of the global spectrum mapping data, wherein the hierarchy corresponding rule comprises:
rule 2. If the subdivision granularity of the nth level is smaller than or equal to the sampling granularity, namely the minimum size (N + 1) of the three is larger than or equal to delta and smaller than or equal to size (N), then N = N +1;
wherein, size (N) represents subdivision granularity under the nth level, and N represents a subdivision network level;
c. calculating a corresponding subdivision grid according to the longitude and latitude height acquired by the global spectrum mapping data, and mapping the attribute of the sampling point to a grid coordinate to determine the grid position when the longitude and latitude height of the sampling point falls into the coordinate range of the subdivision grid in a set range;
d. and carrying out interpolation processing on the grids lacking data.
The global radiation source distribution subgraph subunit is used for determining a subdivision grid where the radiation source is located according to a positioning result of the radiation source based on reading the information of a space domain, an energy domain and a frequency domain of global frequency spectrum mapping data, and displaying a global radiation source distribution subgraph;
the global radiation source distribution subgraph subunit is used for determining a subdivision grid where the radiation source is located according to a positioning result of the radiation source based on reading spatial domain, energy domain and frequency domain information of global frequency spectrum mapping data, obtaining data corresponding to a second grid, and transmitting the data corresponding to the second grid to the visual drawing unit for rendering and drawing, and then displaying a global radiation source distribution subgraph;
the radar three-dimensional coverage area subgraph subunit is used for searching an isosurface by adopting a moving cube algorithm and combining a subdivision grid based on reading the information of a space domain, an energy domain and a frequency domain of the global spectrum mapping data, determining that the preprocessed global spectrum mapping data corresponds to the grid under the grid level, and displaying a radar three-dimensional coverage area subgraph;
the radar three-dimensional coverage area sub-graph unit is used for reading information of airspace, energy domain and frequency domain of the global frequency spectrum mapping data, determining that data required to be mapped to grids under a grid level correspond to the grids, obtaining data corresponding to a third grid, searching an isosurface by adopting a mobile cube algorithm and combining with the subdivision grids, transmitting the data corresponding to the third grid to the visual drawing unit for drawing, and then displaying the radar three-dimensional coverage area sub-graph;
the moving cube algorithm specifically comprises the following steps:
step1: an initial subdivision level L is determined, the data cube is traversed under the level, the vertex is marked, the equivalent surface is marked as '0', and the equivalent surface is marked as '1' if the equivalent surface is not marked.
step2: and judging whether the vertex mark under the hierarchy is '0', if so, continuing to divide the mesh downwards, and otherwise, stopping dividing.
step3: and (5) continuing the steps 1 and 2 until the grids of all the isosurface are found under the required hierarchical grid.
The regional electromagnetic three-dimensional subdivision sub-unit is used for determining a grid level to be drawn based on reading energy domain and airspace information of global spectrum mapping data and displaying a regional electromagnetic three-dimensional subdivision sub-image;
the regional electromagnetic three-dimensional subdivision sub-unit is used for determining a grid level to be drawn based on reading energy domain and airspace information of global spectrum mapping data, corresponding data to grids under the network level to obtain fourth grid corresponding data, and transmitting the fourth grid corresponding data to the visual view drawing unit for displaying regional electromagnetic three-dimensional subdivision sub-images after rendering and drawing according to a visual data request of a fourth grid corresponding data display module;
and the multidimensional electromagnetic situation visual analysis subgraph subunit is used for displaying the multidimensional electromagnetic situation visual analysis subgraph based on reading time domain, space domain, energy domain and frequency domain information of global spectrum mapping data.
The multidimensional electromagnetic situation visualization analysis subgraph subunit is used for corresponding the time domain information, the space domain information, the energy domain information and the frequency domain information of the read global frequency spectrum mapping data to a geospatial system according to the radiation source space coordinate to obtain data corresponding to a fifth grid, and transmitting the data corresponding to the fifth grid to the visualization drawing unit for rendering and drawing, and then displaying the multidimensional electromagnetic situation visualization analysis subgraph.
And the visual view drawing unit is used for rendering and drawing the processed global spectrum mapping data to obtain the rendered and drawn global spectrum mapping data.
The visual view drawing unit comprises a grid determining subunit, a piecewise function subunit, a drawing visualization subunit and a resizing visualization subunit,
the grid determining subunit determines the spatial position of the grid in the scene according to the central coordinates of the subdivision grid obtained by calculation;
the piecewise function subunit maps the field intensity data from small to large into gradual change from red to blue by adopting a piecewise function method and a color mapping scheme according to the change rule of the data, and obtains the gradual change from red to green of the color according to the change of the field intensity value from large to small;
the piecewise function subunit maps field intensity data from small to large into gradual change from red to blue by adopting a piecewise function method according to a data change rule and a color mapping scheme, wherein the color comprises four components of RGBA, RGB is a color component which respectively represents three primary colors of red, green and blue, A is a transparency component which represents the transparency of the color, the value range of each component is [0.0,1.0], assuming that the field intensity value of a certain point is E (the unit is dBm), the color mapping scheme is adopted to carry out a transfer function, the point red component with the largest field intensity is 1.0, the blue and green components are 0.0, the point green component with the smallest field intensity is 1.0, the red and blue components are 0.0, the point with the zero field intensity has the transparency of 0, namely a fully transparent state, and so on, the color gradually changes from red to green according to the field intensity change rule;
wherein the color mapping scheme includes the expression:
wherein Emax represents the maximum value of the energy domain, emin represents the minimum value of the energy domain, R (E), G (E) and B (E) represent the red, green and blue components of the color, A (E) represents the transparency of the color block
The drawing visualization subunit is used for realizing the visual display of the frequency spectrum mapping data in a three-dimensional earth scene by combining the geospatial data (including landform, elevation, geographic image mapping and the like) in the system;
the dimension changing visualization subunit is used for changing the dimension during visualization by changing the hierarchy of the subdivision grid, so that multi-dimension visualization display of the frequency spectrum mapping data is realized.
And the data display module is used for converting the rendered and drawn global spectrum mapping data into a screen view form for display through logic control, man-machine interaction and visual display.
The data presentation module comprises: a logic control unit, a man-machine interaction unit and a visual display unit,
the logic control unit is used for carrying out logic control on the whole system interface;
the human-computer interaction unit is used for judging the input state and content of a keyboard and a mouse and transmitting the input state and content to the data service processing module for processing;
and the visual display unit is used for converting the rendered and drawn global spectrum mapping data into a screen view for presentation in the three-dimensional earth scene.
According to the invention, by judging the data sampling granularity, multi-scale unified modeling of data is realized; the invention realizes the multi-dimensional, multi-view and multi-scale expression of the global spectrum mapping data by a multi-view expression method.
All the above optional technical solutions may be combined arbitrarily to form optional embodiments of the present application, and are not described in detail herein.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. A global spectrum map design and implementation system, comprising: a data source module, a data service processing module and a data display module,
the data source module is used for acquiring global spectrum mapping data and storing the global spectrum mapping data to a database;
the data service processing module is used for preprocessing the global spectrum mapping data through data reading, service operation and data transmission to obtain preprocessed global spectrum mapping data, rendering and drawing the preprocessed global spectrum mapping data, and transmitting the rendered global spectrum mapping data to the data display module;
and the data display module is used for converting the rendered and drawn global spectrum mapping data into a screen view form for display through logic control, man-machine interaction and visual display.
2. The design and implementation system of claim 1, wherein the data source module includes definition data units and access data units,
the defining data unit is used for defining a global spectrum mapping data source, a data format and a data interface;
the access data unit is used for accessing the global spectrum mapping data through the data interface to obtain dynamic perception of spectrum situation.
3. The design and implementation system of claim 1, wherein the data traffic processing module comprises: a preprocessing unit, a business operation unit and a visual view drawing unit,
the preprocessing unit is used for preprocessing the global spectrum mapping data through data transmission, data sorting and data normalization to obtain the processed global spectrum mapping data;
the business operation unit is used for transmitting the processed global frequency spectrum mapping data to the visual view drawing unit based on corresponding business operation;
and the visual view drawing unit is used for rendering and drawing the processed global spectrum mapping data to obtain the rendered and drawn global spectrum mapping data.
4. The design and implementation system of claim 3, wherein the business operation unit comprises: a global spectrum mapping thermodynamic diagram subunit, a global radiation source distribution subgraph subunit, a radar three-dimensional coverage area subgraph subunit, a regional electromagnetic three-dimensional subdivision subgraph subunit and a multidimensional electromagnetic situation visual analysis subgraph subunit,
the global spectrum mapping thermodynamic diagram subunit is used for displaying the global spectrum mapping thermodynamic diagram according to sampling rules based on reading the spatial domain information and the energy domain information of the global spectrum mapping data;
the global radiation source distribution subgraph subunit is used for determining a subdivision grid where the radiation source is located according to a positioning result of the radiation source based on spatial domain, energy domain and frequency domain information of the read global spectrum mapping data, and displaying a global radiation source distribution subgraph;
the radar three-dimensional coverage area sub-unit is used for searching an isosurface by adopting a mobile cube algorithm and combining a subdivision grid based on reading the information of a space domain, an energy domain and a frequency domain of the global spectrum mapping data, determining that the global spectrum mapping data needing to be preprocessed under a grid level corresponds to the grid, and displaying a radar three-dimensional coverage area sub-graph;
the regional electromagnetic three-dimensional subdivision sub-unit is used for determining a grid level to be drawn based on reading energy domain and airspace information of global spectrum mapping data and displaying a regional electromagnetic three-dimensional subdivision sub-image;
and the multidimensional electromagnetic situation visual analysis subgraph subunit is used for displaying the multidimensional electromagnetic situation visual analysis subgraph based on reading time domain, space domain, energy domain and frequency domain information of global spectrum mapping data.
5. The design and implementation system of claim 4, wherein the sampling rules comprise:
a. determining the sampling granularity of global spectrum mapping data, and assuming that the distance distribution of the global spectrum mapping data in the longitude and latitude three dimensions is as follows: if the longitude interval is Δ lon, the latitude interval is Δ lat, and the altitude interval is Δ h, the sampling granularity of the global spectrum mapping data is the minimum value of the longitude interval, the latitude interval and the altitude interval, that is, δ = min (Δ lon, Δ lat, Δ h) is adopted to determine the sampling granularity of the global spectrum mapping data;
b. determining a network corresponding hierarchy, and determining the network corresponding hierarchy according to a hierarchy corresponding rule based on the sampling granularity of the global spectrum mapping data, wherein the hierarchy corresponding rule comprises:
rule 1. If the subdivision granularity and the sampling granularity at the nth level are equal to the minimum value of the three, namely size (N) = δ, then N = N;
rule 2. If the subdivision granularity of the nth level is smaller than or equal to the sampling granularity, namely the minimum size (N + 1) of the three is larger than or equal to delta and smaller than or equal to size (N), then N = N +1;
wherein, size (N) represents subdivision granularity under the nth level, and N represents a subdivision network level;
c. calculating a corresponding subdivision grid according to the longitude and latitude height acquired by the global spectrum mapping data, and mapping the attribute of the sampling point to a grid coordinate to determine the grid position when the longitude and latitude height of the sampling point falls into the coordinate range of the subdivision grid in a set range;
d. and carrying out interpolation processing on the grids lacking data.
6. The design and implementation system of claim 4, wherein the marching cubes algorithm comprises the following specific steps:
step1: an initial subdivision level L is determined, the data cube is traversed under the level, the vertex is marked, the equivalent surface is marked as '0', and the equivalent surface is marked as '1' if the equivalent surface is not marked.
step2: and judging whether the vertex mark under the hierarchy is '0', if so, continuing to divide the mesh downwards, and otherwise, stopping dividing.
step3: and (5) continuing the steps 1 and 2 until the grids of all the isosurface are found under the required hierarchical grid.
7. The design and implementation system of claim 3, wherein the visualization view rendering unit comprises a determine grid subunit, a piecewise function subunit, a render visualization subunit, and a resize visualization subunit,
the grid determining subunit determines the spatial position of the grid in the scene according to the central coordinates of the subdivision grid obtained by calculation;
the piecewise function subunit maps the field intensity data from small to large into gradual change from red to blue by adopting a piecewise function method and a color mapping scheme according to the change rule of the data, and obtains the gradual change from red to green of the color according to the change of the field intensity value from large to small;
the drawing visualization subunit is used for realizing the visual display of the frequency spectrum mapping data in the three-dimensional earth scene by combining the geospatial data in the system;
the dimension changing visualization subunit is used for changing the dimension during visualization by changing the hierarchy of the subdivision grid, so that multi-dimension visualization display of the frequency spectrum mapping data is realized.
8. The design and implementation system of claim 1, wherein the color mapping scheme comprises the expression:
wherein E represents the value of the energy domain, emax represents the maximum value of the energy domain, emin represents the minimum value of the energy domain, R (E), G (E) and B (E) represent the red, green and blue components of the color block, and A (E) represents the transparency of the color block.
9. The design and implementation system of claim 1, wherein the data presentation module comprises: a logic control unit, a man-machine interaction unit and a visual display unit,
the logic control unit is used for carrying out logic control on the whole system interface;
the human-computer interaction unit is used for judging the input states and contents of a keyboard and a mouse and transmitting the input states and contents to the data service processing module for processing;
and the visual display unit is used for converting the rendered and drawn global spectrum mapping data into a screen view for presentation in the three-dimensional earth scene.
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