CN106897425A - A kind of three-dimensional visualization method of terrestrial gravitation field data - Google Patents
A kind of three-dimensional visualization method of terrestrial gravitation field data Download PDFInfo
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- CN106897425A CN106897425A CN201710105916.7A CN201710105916A CN106897425A CN 106897425 A CN106897425 A CN 106897425A CN 201710105916 A CN201710105916 A CN 201710105916A CN 106897425 A CN106897425 A CN 106897425A
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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
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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
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/904—Browsing; Visualisation therefor
Abstract
A kind of three-dimensional visualization method of terrestrial gravitation field data, it is characterised in that comprise the following steps：Multi-source gravity field data is cleaned and merged, and forms the earth gravitational field application data set of standard；Earth gravitational field application data to standard carries out effective storage, organization and management, sets up the seamless organization of graphic image data and the storage mode of blocking organization；And visual presentation is carried out to the earth gravitational field application data of standard, realize gravimetric data Map join, the drafting of isopleth and structure face.
Description
Technical field
The present invention relates to geographic information processing field, more particularly to a kind of three-dimensional visualization side of terrestrial gravitation field data
Method.
Background technology
Visualization technique refer to computer graphic image treatment technology, by complicated scientific phenomena, natural landscape with
And very abstract concept is graphical to understand phenomenon, discovery rule and to convey knowledge.U.S.'s Natural Science Fund in
Propose within 1987 it is a preferential support visualization in scientific computing (Visualization in Scientific Computing,
VISC report), generally encounters but concept not very clearly this theme in developing the conventional more than ten years, is defined in science meter
Calculate in visual scope：" visualization is a kind of computational methods that abstract symbol is converted into geometric figure, so as to researcher's energy
Enough observe its simulation and the process and result that calculate.Widely, it not only includes science meter to the implication of visualization in scientific computing
The visualization of calculation, and the visualization including engineering calculation data, the visualization of surveying and mapping data are the visualization of spatial information.
Visualization of spatial information is the indispensable part of GIS-Geographic Information System, and visualization of spatial information is with meter
Calculation machine graphics, cartography and image processing techniques, by spatial information input, treatment, inquiry, analysis and prediction data and
As a result, with symbol, figure, image, shown with reference to visual patterns such as chart, word, form, videos, and carry out interaction process
Theory, methods and techniques.
In modern urban living development, the theory and application research of earth gravitational field be most active ambit it
One.Earth gravitational field is the physical field for reacting materials on the earth distribution characteristics, restricts the motion of the earth and its any object in space, with
Space technology development is closely related.
The software country on being managed for gravity field information has Headquarters of the General Staff mapping information master station to develop whole world weight at present
Force information system (GGFIS) and the data processing software (GAMIT) in the U.S., but this two sets of softwares all lay particular emphasis on data processing,
Simple figure is only possible to produce, the visual expression function of outcome data is not powerful, it is therefore necessary to gravitational field data visualization
Do deeper into research.
From current domestic and foreign literature it can be found that terrestrial gravitation it is field visualized be the new research field of a comparing.
Gravity field data is a kind of thematic geography information, has stronger correlation with the spatial distribution of the earth, but is different from numeral again
Elevation model, numerical cutting tool etc. represent the space scale data of hypsography change, therefore are visualized for terrain data
Method used is not applied for gravity field data.
The content of the invention
In view of the problem that existing scheme is present, in order to overcome the shortcomings of above-mentioned prior art, the present invention proposes one
Plant the three-dimensional visualization method of terrestrial gravitation field data.
According to an aspect of the invention, there is provided a kind of three-dimensional visualization method of terrestrial gravitation field data, its feature
It is to comprise the following steps：Multi-source gravity field data is cleaned and merged, and forms the earth gravitational field application data set of standard；It is right
The earth gravitational field application data of standard is effectively stored, organization and management, sets up the seamless organization of graphic image data
With the storage mode of blocking organization；And visual presentation is carried out to the earth gravitational field application data of standard, realize gravity number
According to Map join, the drafting of isopleth and structure face.
From above-mentioned technical proposal as can be seen that the invention has the advantages that：
Propose the three-dimension visible sysem of gravity field data, including data organization and management, gravity field data index side
Formula, gravity field data file generated, gravity field data visual representing form.Can have individual clear and definite to gravity field data to user
Understanding.
Brief description of the drawings
Fig. 1 is the flow chart of the three-dimensional visualization method of embodiment of the present invention terrestrial gravitation field data；
Fig. 2 is the flow chart of step S1 in Fig. 1；
Fig. 3 is that step crosses the idiographic flow schematic diagram of S2 in Fig. 1.
Specific embodiment
Certain embodiments of the invention will be done with reference to appended accompanying drawing in rear and more comprehensively describe to property, some of them but not complete
The embodiment in portion will be illustrated.In fact, various embodiments of the present invention can be realized in many different forms, and should not be construed
To be limited to this several illustrated embodiment；Relatively, there is provided these embodiments cause that the present invention meets applicable legal requirement.
In this manual, following is explanation for describing the various embodiments of the principle of the invention, should not be with any
Mode is construed to the scope of limitation invention.Referring to the drawings described below is used to help comprehensive understanding by claim and its equivalent
The exemplary embodiment of the invention that thing is limited.It is described below to help understand including various details, but these details should
Think what is be merely exemplary.Therefore, it will be appreciated by those of ordinary skill in the art that not departing from scope and spirit of the present invention
In the case of, embodiment described herein can be made various changes and modifications.Additionally, for clarity and brevity,
Eliminate the description of known function and structure.Additionally, running through accompanying drawing, same reference numerals are used for identity function and operation.
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
A kind of three-dimensional visualization method of terrestrial gravitation field data is the embodiment of the invention provides, gravimetric data is have studied
Form and processing mode, work(is changed by the file format of original gravity field data generation visualized graphs image file, i.e. system
Can, it is proposed that the blocking organization problem of graphic image file, and data dispatch strategy, discuss interpolation of data method and data are cut
Technology is cut, gravimetric data Map join, the drafting of isopleth and structure face is realized, the display of gravimetric data is finally realized and is answered
With.
Fig. 1 shows the flow chart of the three-dimensional visualization method of embodiment of the present invention terrestrial gravitation field data, refer to figure
1, the three-dimensional visualization method of the terrestrial gravitation field data in this method embodiment is specifically included：
S1, multi-source gravity field data are cleaned and merged, and form the earth gravitational field application data set of standard；
Specifically, the multi-source gravity field data provided according to different institutions or department, have studied multi-source data form and
Processing method, forms the earth gravitational field application data set of standard.
The gravitational field application data that cleaning fusion passes through various sources, according to earth gravity field model (EGM96), by gravity
Measurement acquires initial data and generates gravity anomaly data, the deviation of plumb line number stored in regular grid form after treatment
According to (including north-south component and thing component).According to data content check whether completely, data form whether standard.
Gravity field data generally have isopleth, digital gravity anomaly model (including regular grid and TIN) and
The method for expressing such as digital deviation of plumb line model (including regular grid and TIN).
The mathematical linguistics of gravity field data is described as follows：
X-Y plane domain D is carried out after division ∑, obtain a set R={ r for plane domain1, r2..., rnAnd it is fixed
A continuous function F of the justice on R.
Z=fi(x, y), i=1,2 ..., m, two tuples (∑, F) of composition
If riWith rjIt is adjacent, then there is f at public boundaryi=fj。
The face of our digital terrains is called each fiThe figure of function, side and the node of digital terrain are each function fiTo drawing
Divide the side of ∑ and the constraint of node.
Wherein " ∑ " symbol is the division result for representing plane domain, and F is family of functions, i.e., the set of all f, z represents certain point
The gravitational field size at (x, y) place.
S1 includes step in detail below, as shown in Figure 2：
Various database needed for S101 connections simultaneously obtains related data；
Specifically, one of gravity field data feature is wide material sources, except being encrypted by traditional land and marine gravity
Measure outside the gravity survey data for obtaining, the gravimetric data and the various data meters of combination measured also by aviation, satellite means
That calculates is available for directly using model data, grid data, it is necessary to connect required Various database and obtain related data.
S102 studies and understands obtained data；
Specifically, it is determined that the data item stored in database, to the gravity sources data of various sources, type and application
Classified, the content and attribute of study of various data, the application of study of various gravity field data.
S103 combings and cleaning data；
Specifically, one of the characteristics of many data structures are also magnanimity gravity field data, gravity field information type is various, for example
Discrete data, Grid square etc., therefore cannot be expressed with a kind of data structure, its tissue is also required to different mode with storage.
S104 data conversions and set up database structure；
Specifically, according to Various types of data content and attribute, polynary gravity field information database is designed, is with relational database
Support is stored to gravity field data.
S105 data are combined；
Specifically, merge removal redundancy data represent, integrate different pieces of information collection.
S106 sets up analyze data collection；
Specifically, according to Various types of data content and attribute, polynary gravity field information database is designed, is with relational database
Support is stored to gravity field data.
S2, the earth gravitational field application data to standard carry out effective storage, organization and management, set up graph image number
According to seamless organization and blocking organization storage mode.
Due to the magnanimity feature of spatial information, no matter any class data, if not split and being left concentratedly, can be subject to all
Multifactor limitation, disk size limitation, data maintenance problem etc..In order to solve the above problems, conventional method be by
According to the mode of sheet line system, i.e., according to the mode tissue data of piecemeal, so as to work per treatment be confined to one it is smaller
Within the scope of.When needing across multi-block data, automatically block number evidence is stitched together using software function.
The seamless connection of block data mainly has two kinds of different modes of operation, as shown in Figure 3：The first is straight to data
Connect and be read out display, such as the image data of background；The second way is that data are carried out with necessary treatment, such as vector number
According to, a series of spatial analysis is carried out to it sometimes, thus data block involved in visual range is carried out into geometry edge fit
With logic edge fit, the data in visual range are made to turn into organically seamless entirety.Especially for the vector data of topological type,
In order to ensure the integrality of topological structure, the complexity of data organization and management is increased.Therefore piecemeal is used to image file
Organization and administration, are managed vector data using seamless organization.
No matter which kind of Method of Data Organization will set up Indexing Mechanism, and block data tissue typically sets up block index, nothing
Seam data tissue spatial index it is main when index of reference internal memory in spatial entities screening, take grid spatial index.
Specifically include following steps：
S201, managed using blocking organization for image file and use quaternary tree Indexing Mechanism；
Specifically, blocking organization is, according to certain partitioned mode, to be divided into multiple data by some region of spatial information
Block, is stored in different catalogue or databases in the form of file or table.The mode of piecemeal mainly has：Standard longitude and latitude point
Block, rectangular partition and arbitrary region polygon piecemeal.
Standard longitude and latitude piecemeal is by Spatial-data Integration into multiple data blocks according to latitude and longitude；
Rectangular partition is by Spatial-data Integration into multiple data blocks according to a certain size rectangle；
It by arbitrary polygon by Spatial-data Integration is multiple data blocks that arbitrary region polygon piecemeal is exactly as its name suggests.
Quaternary tree Indexing Mechanism is the tree construction that geographical space recurrence is divided into different levels.It is by the sky of known range
Between be divided into four equal subspaces, such recurrence is gone down, until tree level reach certain depth or meet certain will
Stop segmentation after asking.
Color map is based on as the generation of file using blocking organization management to image file.
Spatial data is exactly generated coloured image by one important means of visualization of spatial information, its technical way
Exactly with color come the quantity and qualitative character of expression of space data, i.e., set up between color and element characteristic (geodata)
One-to-one mapping relations.This image is the Scientific Expression to geographical spatial phenomenon.
S202, for vector data using seamless organization management use grid type spatial index mechanism；
Specifically, seamless organization management is intactly to preserve spatial entities hereof, will when retrieval and inquisition is carried out
Spatial entities in visual range all read display, then are retrieved and spatial analysis, due to this organization and administration side
Formula is greatly improved in the absence of logic edge fit problem, thus operating efficiency.
Grid type spatial index mechanism is that survey region is divided into equal in magnitude or not etc. grid, plaid matching with lines anyhow
Net is encoded, and records the spatial entities that each grid is included.
For the generation that vector data manages equivalent line file using seamless organization.
Isogram be it is a kind of apply extremely wide figure, it be on two dimensional surface in a kind of spatial distribution phenomenon with phase
With the figure that the point of numerical value is formed by connecting.It is rule-based net according to the isopleth generation method that the data source situation present invention is used
Lattice.
The theoretical foundation of isopleth generation is as follows：
In contour analysis, general we so describe those known data points：
P (x, y, value)
Wherein x is the x coordinate value of point P, and y is the y-coordinate value of point P, property value on this point value is.Isopleth is given birth to
Into program theoretical foundation be computer graphics space interpolation it is theoretical, its basic assumption is：On locus closer to
Point, is more possible to similar characteristic value；And apart from more remote point, the similar possibility of its characteristic value is smaller.And think this
The spatial variations of a little characteristic values are smooth, and obey certain distribution probability and statistics stabilization sexual intercourse.
S3, the earth gravitational field application data to standard carry out visual presentation, realize gravimetric data Map join, equivalence
The drafting of line and structure face.
Because the gravity field data such as gravity anomaly, height anomaly and deviation of plumb line type uses grid form tissue data
File.Grid is generally divided with latitude and longitude at equal intervals, and the data class for carrying out reference required for the splicing of map sheet data has：
Gravity grid covering resolution ratio, map sheet longitude and latitude scope, the sheet designation of institute's use ratio chi size.Find correspondence longitude and latitude model
The different pictures for enclosing are spliced.
Isopleth structure face, the value of gravity anomaly, height anomaly and the deviation of plumb line is relative to certain point but suitable in reality
Used time is directed to certain region, it is therefore desirable to constitute region by isopleth, and user is shown in the form of the domain of face.
The process or method described in accompanying drawing above can be by including hardware (for example, circuit, special logic etc.), solid
Part, software (for example, the software being carried in non-transient computer-readable media), or both the treatment logic of combination hold
OK.Although describing process or method according to some order operations above, however, it is to be understood that some described operation energy
Performed with different order.Additionally, concurrently rather than certain operations can be sequentially performed.
It should be noted that in accompanying drawing or specification text, the implementation for not illustrating or describing is affiliated technology
Form known to a person of ordinary skill in the art, is not described in detail in field.Additionally, the above-mentioned definition to each element and method is simultaneously
Various concrete structures, shape or the mode mentioned in embodiment are not limited only to, those of ordinary skill in the art can carry out letter to it
Singly change or replace.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, it should be understood that the foregoing is only specific embodiment of the invention, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc. should be included in protection of the invention
Within the scope of.
Claims (8)
1. a kind of three-dimensional visualization method of terrestrial gravitation field data, it is characterised in that comprise the following steps：
S1：Multi-source gravity field data is cleaned and merged, and forms the earth gravitational field application data set of standard；
S2：Earth gravitational field application data to standard carries out effective storage, organization and management；And
S3：Earth gravitational field application data to standard carries out visual presentation.
2. three-dimensional visualization method according to claim 1, it is characterised in that step S2 includes：
Manage and use quaternary tree to index using blocking organization for the image file of the earth gravitational field application data sets
Mechanism；And
Grid type space is managed and uses using seamless organization for the vector data of the earth gravitational field application data sets
Indexing Mechanism.
3. three-dimensional visualization method according to claim 2, it is characterised in that the blocking organization management is by a region
Spatial information according to partitioned mode, be divided into multiple data blocks, different catalogue or numbers are stored in the form of file or table
According in storehouse.
4. three-dimensional visualization method according to claim 3, it is characterised in that the partitioned mode includes standard longitude and latitude
Piecemeal, rectangular partition or arbitrary region polygon piecemeal.
5. three-dimensional visualization method according to claim 2, it is characterised in that the quaternary tree Indexing Mechanism is by geography
Space recurrence is divided into the tree construction of different levels.
6. three-dimensional visualization method according to claim 2, it is characterised in that the seamless organization management is by space reality
Body is intactly preserved hereof, and the spatial entities in visual range are all read into display when retrieval and inquisition is carried out,
Retrieved again and spatial analysis.
7. three-dimensional visualization method according to claim 2, it is characterised in that the grid type spatial index mechanism be by
Survey region lines anyhow divide equal in magnitude or not etc. grid, grid are encoded, and record each grid
Comprising spatial entities.
8. three-dimensional visualization method according to claim 1, it is characterised in that step S1 includes：
Various database needed for connection simultaneously obtains related data；
Research and the obtained data of understanding；
Combing and cleaning data；
Data conversion and set up database structure；
Data are combined；And
Set up the earth gravitational field application data set of standard.
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Application publication date: 20170627 |