CN101702169A - Orthogonal section method and system for evolution analysis of digital shorelines - Google Patents
Orthogonal section method and system for evolution analysis of digital shorelines Download PDFInfo
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Abstract
The invention discloses an orthogonal section method and system for evolution analysis of digital shorelines, which aims to provide a section method which is suitable for different shoreline types and a system which has high degree of automation and reliable calculation results and can effectively show the evolution data information of shorelines. By using the GIS technology and the method of graphics, and by integrating the parameter setting module, section constructing module, calculating and counting module, result showing module, dynamic simulation module and the like to establish the technical scheme, the invention realizes the automation of the whole operation flow. The method and the system of the invention can obviously improve the work efficiency and the operation level, can increase the understandability of the industrial data information, and can provide services for estuarine and coastal engineering, scientific research fields and related decision-making departments.
Description
Technical field
The present invention relates to the applied technical field that GIS (Geographic Information System) combines with coastal engineering, relate in particular to a kind of water front that calculates towards the orthogonal section method of silt evolution analysis and the water front evolution analysis system of robotization.
Background technology
Accurate Analysis and grasp the development law of historical water front helps to assess and predict the variation tendency of following water front, for coastal zone planning with manage significant.Because the geometric shape of water front is the result of various dynamic factors combined actions, therefore in the coastal engineering technical field for hydrodynamic model, carry out modeling and study the method that inherent coast erosion process just becomes a kind of widespread use and is convenient to realize indirectly by water front is changed.And, along with the fast development of remote sensing technology, to obtain digital shorelines from remote sensing image and become and be more prone to, precision is also more and more higher, thereby the evolution analysis of digital shorelines obtains more extensive application day by day.
In existing evolution analysis of digital shorelines method, the method for section is that one of method of modeling is carried out in the most frequently used water front is changed.A kind of center radiation shape section method introduced in " ocean journal " 1992 the 14th volumes the 3rd interim " forecasting research that the HUANGHE ESTUARY zone develops " literary composition, its constructive method is to do straight line and water front from the basic point that the user selectes to intersect, weak point is that this method is only applicable to the comparatively regular fan-shaped delta seashore of shape is analyzed, and can't be used for other seashore type; The report " Digital Shoreline Analysis System (DSAS) version 4.0-AnArcGIS extension for calculating shoreline change " of US Geological Survey (USGS) website issue in 2009 (" digital shorelines analytic system 4.0-calculates the ArcGIS expansion that water front changes ") discloses a kind of vertical profile method, its constructive method is perpendicular to that seashore baseline that the user selectes is done straight line equally spacedly and water front intersects, weak point is the analysis that this method is only applicable to simple straight water front, then can't obtain reliable result for the non-straight water front of complexity.Especially, along with the raising that can obtain the data space precision, the complexity of digital shorelines and the requirement of analysis result precision also constantly promoted thereupon, this becomes one of traditional main challenge that section method faced.On the other hand, in the middle of practical application, also lack analysis tool targetedly, common way is by a large amount of handwork, function by other analysis software such as ArcGIS, MapInfo, Excel etc. realizes that step by step work efficiency, computational accuracy all can't adapt to the requirement of current extensive businessization application simultaneously.In addition, coastal zone is the sensitive area of socio-economic development, the development law of coastal zone should not only limit to the professional person and understand, more need to be familiar with and to pay close attention to by the general public, therefore be necessary that developing the public is easy to the specialized information that cognitive mode shows that coastal zone develops, and still lack similar systems approach at present.
Summary of the invention
A kind of orthogonal section method that all kinds water front is had universality of providing at the deficiencies in the prior art is provided, and utilize the method for GIS technology and graphics, integrate treatment steps such as cross-section structure, statistical study, result's displaying, generation analysis report, set up the evolution analysis of digital shorelines system, realized the robotization of whole service flow process.
The objective of the invention is to be achieved through the following technical solutions:
First feature of the present invention has provided a kind of orthogonal section generation method that is used for evolution analysis of digital shorelines, may further comprise the steps:
(1), generates virtual water front
Baseline is included in the middle of the water front, and being provided with n bar water front can utilize, and performing step is as follows:
If a) intersection point is arranged between the water front, be that interrupt corresponding water front and is a plurality of water front sections on the boundary with the intersection point; Do not have intersection point between the water front, then have only from water front section of origin-to-destination;
B) from the onshore or to an extra large side, with the most close onshore or to reconnect to the water front section of an extra large side be one new " water front ", the rest may be inferred, reconnected up to the distance onshore or to extra large side water front section farthest; So original water front is reconfigured and mutually disjoint for the n bar but have new " water front " of common point;
C) starting point of adjacent per two new " water fronts " from the space, with the common point is the boundary, from starting point to first common point be first section, from first common point to the second common point be second section ..., be final stage from last common point to terminal point; If no common point then has only from one section of origin-to-destination; Two line segments of each section correspondence all are divided into several segments, corresponding successively, with continuous respectively formation straight-line segment such as the end points of corresponding segment behind the branch such as grade; All straight-line segment five equilibriums that will constitute again obtain a plurality of intermediate points, and corresponding intermediate point is linked to each other promptly obtains corresponding centre " water front ";
D) all new " water fronts " constitute virtual water front jointly with middle " water front ", and the bar number scale of virtual water front is m;
(2), structure orthogonal section
A) be baseline from the virtual water front of article one, be followed successively by the virtual water front of second, the 3rd virtual water front, to the last a virtual water front by distance baseline order from the close-by examples to those far off;
B) at first, on the virtual water front of article one, select a point to be designated as P
1, P
1The straight-line segment at place is designated as L
1, on the virtual water front of second with L
1Adjacent straight-line segment is designated as L
2, L
1With L
2Intersection point or the intersection point of extended line be designated as O, be the center of circle with O, line segment OP
1Be circle of radius structure, circle and L
2Intersection point be designated as P
2, L
1With L
2Between folded circular arc be designated as
C) then, from P
2Set out, between second and the 3rd virtual water front according to the same method construct circular arc of step b
The rest may be inferred, and to the last a virtual water front is constructed circular arc respectively
D) connect circular arc
Promptly constitute an orthogonal section;
(3), from the baseline starting point, along baseline equally spacedly repeating step (2) construct each bar orthogonal section, up to the terminal point of baseline, finish the structure of all orthogonal sections.
Two circular arcs that the adjacent virtual water front is folded in the described step (2), can with the straight line that connects the circular arc two-end-point, in connect broken line or circumscribed piecewise linear approximation is realized.
Orthogonal section of being constructed and baseline and all water front quadratures.
Second feature of the present invention has provided a kind of evolution analysis of digital shorelines system, by constituting with lower module:
(1), parameter is provided with module: be used to be provided with baseline parameter, water front parameter, section parameter and intersection point parameter;
(2), structure section module: be used to be provided with section outgoing route, section title, the base direction that whether reverses, and generate corresponding section according to set parameter;
(3), counting statistics module: be used to select sectional drawing layer, confidence level and statistical method parameter, and count corresponding water front rate of change and corresponding statistic thereof according to set calculation of parameter;
(4), display module as a result: be used to the net result of showing that output calculates, comprise section dynamically, water front rate of change and statistical report text;
(5), dynamic similation module: be used for the simulation of water front evolution process.
Further measure of the present invention is:
Described parameter is provided with module, wherein: and baseline, water front parameter are set comprise and select baseline chart layer, water front figure layer, and the time field of water front figure layer and error field; The section parameter is set comprises that selecting the section type is vertical profile or orthogonal section, section spacing and section length be set, select the section direction to be left and right or automatic detection; The intersection point parameter is set comprises that selecting intersection point is nearest intersection point or intersection point farthest.
Described structure section module is used for generating corresponding vertical profile or orthogonal section according to set parameter; If the direction of the section that generates can not intersect with water front, the base direction of then can selecting to reverse regenerates, and can the section that be generated be saved as unique file according to the path and the section title of user's appointment.
Described counting statistics module, be used for selecting the sectional drawing layer that will calculate, one to three kind of method of specifying confidence level and selecting end-point method, linear regression and weighted linear to return three kinds of statistical methods to carry out counting statistics, and output intersection point tables of data and result data table;
Wherein: the intersection point tables of data comprises intersecting point coordinate, the data messages such as distance of each intersection point along section to baseline of every water front and section; The result data table comprises the result who calculates according to user-selected method: the result of calculation of end-point method is the water front rate of change that utilizes end-point method to obtain; The result of calculation of linear regression and weighted linear homing method comprises each self-corresponding water front rate of change, and R
2, estimated standard deviation, user specify the slope standard deviation under the confidence level.
Described display module as a result is used to generate statistical report text and the final output result of interactive display, comprises that water front rate of change figure, section dynamically scheme and the statistical report text;
Wherein: water front rate of change figure, can select to show, and the water front rate of change is on the occasion of carrying out mark with different colors respectively with the point of negative value by in the specified statistical method of user any one; Select related map, then the water front rate of change is the marker color that is shown as corresponding point among the water front rate of change figure on the occasion of the section with negative value respectively in the map window, and select one of them section, the corresponding point among the water front rate of change figure are highlighted demonstration, show corresponding water front rate of change numerical value simultaneously; Water front rate of change figure can be output as jpeg, bmp, png, gif and packaged type PostScript picture;
Wherein: section is dynamically schemed, and can select to be showed by in the specified statistical method of user any one, also can specify confidence level to show by the user; Section dynamically figure is directly related with result data table and map, and a record in the selection result tables of data shows that the section of correspondence is dynamically schemed, and section corresponding in the map window is selected; Select a section in the map window, show that the section of correspondence is dynamically schemed, record corresponding in the result data table is selected; The dynamic figure of section can be output as jpeg, bmp, png, gif and packaged type PostScript picture;
Wherein: statistical report text, content comprise calculating water front total length, section spacing; Each self-corresponding overall maximum of user-selected each counting statistics method, minimum and average water front rate of change, bank section total length, maximum, minimum and the average speed that rises of becoming silted up of rising of becoming silted up, eroding bank section total length, maximum, minimum and average erosion rate; And there is not a result of calculation bank segment length.
Described dynamic similation module supposes that water front at the uniform velocity develops between adjacent two time points, and then adopts distortion (Morphing) technology to realize the simulation of water front towards the silt evolution process, and can control simulation process;
Compared with prior art, the invention has the beneficial effects as follows: orthogonal section method of the present invention goes for dissimilar water fronts, for straight water front, the section that is constructed approaches vertical profile, and for the non-straight water front of complexity, the section of being constructed is orthogonal to each bar water front, and the nature evolution pattern of its direction and water front matches, and has improved water front rate of change computation's reliability; Water front evolution analysis of the present invention system, utilize the method for GIS technology and graphics to realize the robotization of water front evolution analysis entire process flow process, reduce and eliminated the intensity and the subjectivity of handwork, improved work efficiency, guarantee precision of calculation results and reliability, also made result of calculation have comparability; Adopt the two-dimensional diagram mode related simultaneously, and the mode of dynamic similation shows to the result, strengthened the intuitive of expert data information, make the result be easy to be understood by unprofessional user with map.
Description of drawings
Fig. 1 is that the virtual water front of the present invention generates synoptic diagram
Fig. 2 is that the present invention constructs the orthogonal section synoptic diagram
Fig. 3 is an evolution analysis of digital shorelines system flowchart of the present invention
Fig. 4 is the major parameter synoptic diagram that the present invention needs user's appointment
Fig. 5 is the orthogonal section figure that the present invention generates
Fig. 6 is the related exploded view with map of water front rate of change figure of the present invention
Fig. 7 is the dynamically related exploded view with map of figure of water front of the present invention
Fig. 8 is a water front evolution process simulation drawing of the present invention
Embodiment
Embodiment is an example with Shanghai City Chongming Dongtan non-straight water front below for convenience of description, in conjunction with the accompanying drawings the present invention is described in further detail.
The water front of Chongming Dongtan is typical non-straight water front, as shown in Figure 5, the data of 05/18/1987,12/04/1990,04/06/1995,11/08/1998,10/21/2003,0,4/2,0/2,006 6 time point have been adopted in this example, because the hydrodynamic condition complexity of this bank section, there is situation about intersecting each other in 6 water fronts.
Orthogonal section generation method, step is as follows:
A) at first generate virtual water front, consult Fig. 1, wherein up and down outermost virtual water front should overlap with the position of original water front, for ease of illustrating, respectively with they up and down the both sides translation one segment distance; In this example (Fig. 5), comprise that baseline need handle 7 water fronts, step is:
(1), obtain all intersection points of 7 water fronts, wherein do not have intersection point between baseline and the water front, be that interrupt the water front that intersects and is each self-corresponding water front section on the boundary with the intersection point;
(2), according to from the order of baseline to the sea, successively the water front section is reconnected 7 new " water fronts " only there being common point for mutually disjointing;
(3), consult Fig. 1, the starting point of adjacent per two new " water fronts " from the space, with the common point is the boundary, from starting point to first common point be first section, from first common point to the second common point be second section ..., be final stage from last common point to terminal point; If there is not common point, then have only from one section of origin-to-destination; Two line segments of each section correspondence are divided into identical umber, corresponding successively, with the continuous respectively formation straight-line segment of end points; All straight-line segment five equilibriums that will constitute again obtain a plurality of intermediate points, and corresponding intermediate point is linked to each other promptly obtains corresponding centre " water front ";
(4), all new " water fronts " constitute virtual water front jointly with middle " water front ".
B) construct orthogonal section on the basis of virtual water front, see also Fig. 2, building method is as follows:
(1), be baseline from the virtual water front of article one, be followed successively by the virtual water front of second, the 3rd virtual water front, to the last a virtual water front by distance baseline order from the close-by examples to those far off;
(2), at first, select a point to be designated as P1 on the virtual water front of article one, the straight-line segment at P1 place is designated as L
1, on the virtual water front of second with L
1Adjacent straight-line segment is designated as L
2, L
1With L
2Intersection point or the intersection point of extended line be designated as O, be the center of circle with O, line segment OP
1Be circle of radius structure, circle and L
2Intersection point be designated as P
2, L
1With L
2Between folded circular arc be designated as
(3), then, from P
2Set out, between second and the 3rd virtual water front according to the same method construct circular arc of step (2)
The rest may be inferred, and to the last a virtual water front is constructed circular arc respectively
(4), connect circular arc
Promptly constitute an orthogonal section.
C) from the baseline starting point, construct each bar section along baseline with the spacing repeating step b of 2000m, up to the terminal point of baseline, construct 17 orthogonal sections altogether.As shown in Figure 5, can find that for the comparatively straight bank section in below, orthogonal section approaches straight line, and all orthogonal sections and baseline and each bar water front quadrature all, the direction of orthogonal section is consistent with the nature evolution direction of water front.
The approximate data that realizes as programming, the circular arc in the above-mentioned steps b implementation method between two adjacent virtual water fronts can with the straight line that connects the circular arc two-end-point, in connect or circumscribed broken line replaces, also can adopt other method with the circular arc discretize.
Based on above-mentioned orthogonal section generation method, evolution analysis of digital shorelines system of the present invention (consulting Fig. 3), the step of embodiment (Chongming Dongtan) being carried out the water front evolution analysis is as follows:
(1), load baseline and water front data, carry out the parameter setting, consult Fig. 4.Select baseline chart layer, water front figure layer, time field, error field, system default time field and error word name section are respectively Date_, Uncy, if field name corresponding in the water front figure layer is consistent with system default value, time field and error field will load automatically, otherwise need the user to specify; Selecting the section type is that orthogonal section, section spacing are 2000m; Select orthogonal section, section length and section direction parameter are with unavailable; If section type selecting vertical profile can be determined section length according to the horizontal space scope that water front is crossed over, according to the direction of baseline, and the position of baseline and water front relation is determined the section direction; Selecting the intersection point parameter is nearest intersection point or intersection point farthest, if a section will come into force with a water front existence this selection of situation more than an intersection point.
(2), structure section.Select the outgoing route of sectional drawing layer, system default value is the path at water front data place; Specify the section title; Select orthogonal section in parameter is provided with, this place's counter-rotating base direction is unavailable; Under the situation of vertical profile, if the section and the water front that generate are non-intersect, the base direction of then can selecting to reverse regenerates section.The orthogonal section that is generated sees also Fig. 5.
(3), counting statistics.Selecting the sectional drawing layer is the specified section title of " structure section " step; Select confidence level and computing method, computing method comprise end-point method, linear regression method and weighted linear homing method, can select one to three kind of method, and confidence level will be used in the middle of linear regression method and the weighted linear homing method.This step is calculated and is finished, and intersection point tables of data and the counting statistics result data table that generates section and water front will be given tacit consent to by system, and be kept in the specified path of " structure section " step.Wherein, the result of calculation of end-point method is the water front rate of change that utilizes end-point method to obtain; The result of calculation of linear regression and weighted linear homing method comprises each self-corresponding water front rate of change, and R
2, estimated standard deviation, user specify the slope standard deviation under the confidence level.
(4), the result shows.Water front rate of change figure shows the water front rate of change result (consulting Fig. 6) who calculates; Section dynamically schemes to show the statistical study situation (consult Fig. 7) of any section corresponding to selected computing method; Generate statistical report and will obtain the general status of whole water front, and the rise situation of bank section and eroding bank section of becoming silted up gathers output selected each computing method;
Wherein, water front rate of change figure can select to be showed by in the specified statistical method of user any one, and the water front rate of change is on the occasion of carrying out mark with different colors respectively with the point of negative value; Select related map, then the water front rate of change is the marker color that is shown as corresponding point among the water front rate of change figure on the occasion of the section with negative value respectively in the map window, and select one of them section, the corresponding point among the water front rate of change figure are highlighted demonstration, show corresponding water front rate of change numerical value simultaneously; Water front rate of change figure can be output as jpeg, bmp, png, gif and packaged type PostScript picture;
Wherein, the dynamic figure of section can select to be showed by in the specified statistical method of user any one, also can specify confidence level to show by the user; Section dynamically figure is directly related with result data table and map, a record in the selection result tables of data, the section that shows correspondence is dynamically schemed, section corresponding in the map window is selected, select a section in the map window, the section that shows correspondence is dynamically schemed, and record corresponding in the result data table is selected; The dynamic figure of section can be output as jpeg, bmp, png, gif and packaged type PostScript picture.
In addition, can utilize the dynamic similation module that the silt evolution process that dashes of water front is simulated, see also Fig. 8.This module supposes that water front at the uniform velocity develops between adjacent two time points, and adopts distortion (Morphing) technology to realize on this basis.At first, select the time interval of water front figure layer and simulation, carry out data initialization; After initialization is finished, can show the beginning and ending time that water front develops; Broadcasting speed is set, and the beginning water front shows the time of current simulation water front towards the simulation of silt evolution process in the middle of the simulation process, and can the real time altering broadcasting speed, suspend or restart.
Claims (9)
1. orthogonal section generation method that is used for evolution analysis of digital shorelines is characterized in that this method may further comprise the steps:
(1), generates virtual water front
Baseline is included in the middle of the water front, and being provided with n bar water front can utilize, and performing step is as follows:
If a) intersection point is arranged between the water front, be that interrupt corresponding water front and is a plurality of water front sections on the boundary with the intersection point; Do not have intersection point between the water front, then have only from water front section of origin-to-destination;
B) from the onshore or to an extra large side, with the most close onshore or to reconnect to the water front section of an extra large side be one new " water front ", the rest may be inferred, reconnected up to the distance onshore or to extra large side water front section farthest; So original water front is reconfigured and mutually disjoint for the n bar but have new " water front " of common point;
C) starting point of adjacent per two new " water fronts " from the space, with the common point is the boundary, from starting point to first common point be first section, from first common point to the second common point be second section ..., be final stage from last common point to terminal point; If no common point then has only from one section of origin-to-destination; Two line segments of each section correspondence all are divided into several segments, corresponding successively, with continuous respectively formation straight-line segment such as the end points of corresponding segment behind the branch such as grade; All straight-line segment five equilibriums that will constitute again obtain a plurality of intermediate points, and corresponding intermediate point is linked to each other promptly obtains corresponding centre " water front ";
D) all new " water fronts " constitute virtual water front jointly with middle " water front ";
(2), structure orthogonal section
A) be baseline from the virtual water front of article one, be followed successively by the virtual water front of second, the 3rd virtual water front, to the last a virtual water front by distance baseline order from the close-by examples to those far off;
B) at first, on the virtual water front of article one, select a point, it is first point, the straight-line segment at this place is first straight-line segment, the straight-line segment adjacent with first straight-line segment is second straight-line segment on the virtual water front of second, the intersection point of first straight-line segment and second straight-line segment or the intersection point of extended line, it is first intersection point, with this intersection point is the center of circle, the line segment of this intersection point to the first is circle of radius structure, circle is second point with the intersection point of second straight-line segment, and folded circular arc is first circular arc between first straight-line segment and second straight-line segment;
C) then, from second, according to same method construct second circular arc of step b, the rest may be inferred between second and the 3rd virtual water front, and to the last a virtual water front is constructed three-arc, the 4th circular arc respectively
D) connect whole circular arcs of being constructed successively and promptly constitute an orthogonal section;
(3), from the baseline starting point, along baseline equally spacedly repeating step (2) construct each bar orthogonal section, up to the terminal point of baseline, finish the structure of all orthogonal sections.
2. method according to claim 1 is characterized in that two circular arcs that the adjacent virtual water front is folded in the described step (2), with the straight line that connects the circular arc two-end-point, in connect broken line or circumscribed broken line is similar to realization.
3. method according to claim 1 is characterized in that orthogonal section and baseline and all water front quadratures of being constructed.
4. evolution analysis of digital shorelines system is characterized in that this system comprises with lower module:
(1), parameter is provided with module: be used to be provided with baseline parameter, water front parameter, section parameter and intersection point parameter;
(2), structure section module: be used to be provided with section outgoing route, section title, the base direction that whether reverses, and generate corresponding section according to set parameter;
(3), counting statistics module: be used to select sectional drawing layer, confidence level and statistical method parameter, and count corresponding water front rate of change and corresponding statistic thereof according to set calculation of parameter;
(4), display module as a result: be used to the net result of showing that output calculates, comprise section dynamically, water front rate of change and statistical report text;
(5), dynamic similation module: be used for the simulation of water front evolution process.
5. analytic system according to claim 4 is characterized in that described parameter is provided with in the module, baseline, water front parameter is set comprises time field and the error field of selecting baseline chart layer, water front figure layer and water front figure layer; The section parameter is set comprises that selecting the section type is vertical profile or orthogonal section, section spacing and section length be set, select the section direction to be left and right or automatic detection; The described intersection point parameter that is provided with comprises that selecting intersection point is nearest intersection point or intersection point farthest.
6. analytic system according to claim 4 is characterized in that in the described structure section module that generating corresponding end face according to set parameter is vertical profile or orthogonal section; If the direction of the section that generates can not intersect with water front, then the selection base direction that reverses regenerates, and according to the path and the section title of user's appointment, the section that is generated is saved as unique file.
7. analytic system according to claim 4, it is characterized in that described counting statistics module, what be used for selecting the sectional drawing layer that will calculate and specify that confidence level adopts end-point method, linear regression method and the weighted linear Return Law a kind ofly carries out counting statistics to three kinds of methods, and output intersection point tables of data and result data table;
Described intersection point tables of data comprises intersecting point coordinate, the range data information of each intersection point along section to baseline of every water front and section;
Described result data table comprises the result who calculates according to user-selected method: the result of calculation of end-point method is the water front rate of change that utilizes end-point method to obtain; The result of calculation of the linear regression method and the weighted linear Return Law comprises each self-corresponding water front rate of change, and R
2, estimated standard deviation, user specify the slope standard deviation under the confidence level.
8. analytic system according to claim 4 is characterized in that described display module as a result, is used to show the net result that output calculates, and comprises that water front rate of change figure, section dynamically scheme and the statistical report text:
Described water front rate of change figure selects to be showed by in the specified statistical method of user any one, and the water front rate of change is on the occasion of carrying out mark with different colors respectively with the point of negative value; Select related map, then the water front rate of change is the marker color that is shown as corresponding point among the water front rate of change figure on the occasion of the section with negative value respectively in the map window, and select one of them section, the corresponding point among the water front rate of change figure are highlighted demonstration, show corresponding water front rate of change numerical value simultaneously; Water front rate of change figure can be output as jpeg, bmp, png, gif and packaged type PostScript picture;
Described section is dynamically schemed, and selects to be showed or specified confidence level to show by the user by in the specified statistical method of user any one; Section dynamically figure is directly related with result data table and map, and a record in the selection result tables of data shows that the section of correspondence is dynamically schemed, and section corresponding in the map window is selected; Select a section in the map window, show that the section of correspondence is dynamically schemed, record corresponding in the result data table is selected; The dynamic figure of section can be output as jpeg, bmp, png, gif and packaged type PostScript picture;
Described statistical report text, content comprise calculating water front total length, section spacing; Each self-corresponding overall maximum of user-selected each counting statistics method, minimum and average water front rate of change, bank section total length, maximum, minimum and the average speed that rises of becoming silted up of rising of becoming silted up, eroding bank section total length, maximum, minimum and average erosion rate; And there is not a result of calculation bank segment length.
9. analytic system according to claim 4 is characterized in that described dynamic similation module, supposes that water front at the uniform velocity develops between adjacent two time points, adopts deformation technology to realize the simulation of water front towards the silt evolution process, and simulation process is controlled.
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| CN103559545A (en) * | 2013-11-08 | 2014-02-05 | 广东省水文局佛山水文分局 | Digital underwater topography intelligent management system for watercourse |
| CN111736582A (en) * | 2019-03-19 | 2020-10-02 | 北京奇虎科技有限公司 | Path processing method and device, electronic equipment and computer readable storage medium |
| CN115511390A (en) * | 2022-11-14 | 2022-12-23 | 南方科技大学 | Method, system, terminal and storage medium for evaluating vulnerability of coastal river |
| CN115512601A (en) * | 2022-11-15 | 2022-12-23 | 武汉智图科技有限责任公司 | Automatic splicing method and device for geographic information non-connection linear elements |
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2009
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589528A (en) * | 2012-01-19 | 2012-07-18 | 中国测绘科学研究院 | Multi-temporal imaging island shoreline surveying method |
| CN102589528B (en) * | 2012-01-19 | 2013-12-04 | 中国测绘科学研究院 | Multi-temporal imaging island shoreline surveying method |
| CN103559545A (en) * | 2013-11-08 | 2014-02-05 | 广东省水文局佛山水文分局 | Digital underwater topography intelligent management system for watercourse |
| CN111736582A (en) * | 2019-03-19 | 2020-10-02 | 北京奇虎科技有限公司 | Path processing method and device, electronic equipment and computer readable storage medium |
| CN115511390A (en) * | 2022-11-14 | 2022-12-23 | 南方科技大学 | Method, system, terminal and storage medium for evaluating vulnerability of coastal river |
| CN115512601A (en) * | 2022-11-15 | 2022-12-23 | 武汉智图科技有限责任公司 | Automatic splicing method and device for geographic information non-connection linear elements |
| CN115512601B (en) * | 2022-11-15 | 2023-02-28 | 武汉智图科技有限责任公司 | Automatic splicing method and device for geographic information non-connection linear elements |
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| CN101702169B (en) | 2011-12-28 |
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