CN112579723A - GIS-based infinite scaling optimization display method for power grid line - Google Patents
GIS-based infinite scaling optimization display method for power grid line Download PDFInfo
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Abstract
The invention relates to a GIS-based power grid line infinite scaling optimization display method, which is technically characterized by comprising the following steps of: establishing a power grid map line tower point information base; setting a line rarefying distance threshold; determining a distance threshold of the level according to the zoom degree; whether the tower point is kept to be displayed or not is judged according to the distance threshold; confirming a set of pole tower points to be reserved, and sequentially connecting the reserved pole tower points to obtain the infinite scaling optimized display of the power grid line at the level; setting a double-circuit line display rule, and repeatedly performing rarefaction treatment on the line until the power grid line is displayed according to the display level. The invention can realize the infinite zoom optimization display of the power grid map, reduce the number of the line pole tower points, simultaneously realize the optimal display effect during zooming aiming at the double-circuit line, greatly reduce the redundant control points in the power grid line, simplify the line, reduce the data volume to the maximum extent, enhance the usability of the system and improve the working efficiency of dispatching managers.
Description
Technical Field
The invention belongs to the technical field of power transmission lines, and particularly relates to a GIS-based infinite scaling optimization display method for a power grid line.
Background
The transmission line bears energy transportation life lines required by national production and life, and is an important component of a power grid system. The geographic information navigation system integrates data such as ground image data, elevation data, thematic information data, planned lines, established lines and the like, and a scheduling manager can manage and plan the power transmission line through a power grid line based on a GIS (geographic information system), wherein readability and readability of the line influence data display, post-processing and analysis speed and are the key points of attention of the scheduling manager, so that the method ensures precision, accurately represents the characteristics of key ground objects such as towers and the like by fewer points, thins and simplifies original power transmission line tower data, reduces unnecessary data redundancy, improves data processing efficiency and is very necessary.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a GIS-based power grid line infinite scaling optimization display method, which uses a thinning algorithm to process a power grid line, can enhance the usability of a system and improve the working efficiency of dispatching managers.
The invention solves the technical problems in the prior art by adopting the following technical scheme:
a GIS-based infinite scaling optimization display method for a power grid line comprises the following steps:
step 1, establishing a power grid map line tower point information base;
step 2, setting a threshold value of a line rarefying distance;
step 3, determining a distance threshold of the level according to the zoom degree; whether the tower point is kept to be displayed or not is judged according to the distance threshold; confirming a set of pole tower points to be reserved, and sequentially connecting the reserved pole tower points to obtain the infinite scaling optimized display of the power grid line at the level;
and 4, setting a double-circuit line display rule, repeating the step 3, and performing rarefaction processing on the line until the power grid line is displayed according to the display level, so that the GIS-based power grid line infinite scaling double-circuit line display function is realized.
Further, the power grid map line tower point information base is constructed by extracting information from a GIS system.
Further, the specific implementation method of step 1 is as follows: firstly, establishing a tower information table, wherein the tower information table comprises tower names, tower numbers, tower types, tower point longitude information and tower point latitude information; and then, establishing a line tower relation table, wherein the line tower relation table comprises a line ID, a tower name, a tower number and a tower ID, and determining the corresponding relation between the line and the tower.
Further, the specific implementation method of step 2 is as follows: and setting the viewpoint heights of different levels according to the working habits of the dispatchers, setting the information quantity required to be acquired under the viewpoint height of the level, and further determining the distance threshold value used for thinning.
Further, the specific implementation method of step 3 includes the following steps:
determining a distance threshold value of a level according to a scaling degree;
secondly, a circuit starting point S and a circuit end point E are connected and marked as Line 1;
thirdly, calculating the distance from other tower points on the Line to Line1, finding the farthest point P from the Line1, and judging whether the distance from the point P to the Line1 is smaller than the distance threshold value of the level;
fourthly, if the distance from the point P to the Line1 is smaller than the distance threshold value of the level, only a Line starting point S and a Line ending point E are reserved on the Line 1;
if the distance from the point P to the Line1 is greater than the distance threshold value of the level, marking the connection point P and the Line starting point S as Line2, and marking the connection point P and the Line ending point E as Line3, and repeating the step 3 on the Line2 and the Line3 until all the tower points on each Line are less than the distance threshold value of the level;
sixthly, confirming a set of pole and tower points to be reserved, and sequentially connecting the reserved pole and tower points to obtain the display of the power grid line at the level.
Further, the specific implementation method of step 4 is as follows: firstly, setting a fixed distance between lines, and ensuring that the distance between double-circuit lines is unchanged when the double-circuit lines are displayed on a map under different zoom levels; secondly, uniformly translating leftwards for a fixed distance according to the starting point and the ending point of the line, and drawing a double-circuit line; and finally, repeatedly using the infinite scaling optimization display method of the power grid line until the power grid line is displayed according to the display level.
The invention has the advantages and positive effects that:
the invention adopts the line rarefying technology, can realize the infinite zoom optimization display of the power grid map, reduces the number of the line pole tower points under the condition of not influencing the line trend, simultaneously can realize the optimal display effect during zooming aiming at the double-circuit line, can greatly reduce the redundant control points in the power grid line, simplifies the line, reduces the data volume to the maximum extent, enhances the usability of the system and improves the working efficiency of dispatching managers. Has very wide engineering application value.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention;
fig. 2a, 2b, 2c and 2d are process diagrams of the process of performing the thinning process on the line in sequence.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings.
A GIS-based infinite scaling optimization display method for a power grid line, as shown in FIG. 1, comprises the following steps:
step 1, establishing a power grid map line tower point information base.
The specific implementation method of the step is as follows:
firstly, extracting data in a GIS (geographic information System) to establish a tower information table, wherein the tower information table comprises tower names, tower numbers, tower types, tower point longitude information and tower point latitude information;
and then, establishing a line tower relation table, wherein the line tower relation table comprises a line ID, a tower name, a tower number and a tower ID, and determining the corresponding relation between the line and the tower.
And 2, setting a threshold value of the line rarefying distance.
In the step, the viewpoint heights of different levels are set according to the working habits of the scheduling staff, the information quantity required to be acquired under the viewpoint height of the level is set, and the distance threshold value used for thinning is determined, so that the scheduling management staff can acquire enough information quantity under the viewpoint height of the level.
And 3, establishing a GIS-based infinite scaling optimization display method for the power grid line.
The design idea of the step is as follows: firstly, determining a distance threshold of a level according to the zoom degree; then, whether the tower point is kept to be displayed or not is judged according to a threshold value; and finally, confirming the set of the tower points to be reserved, and sequentially connecting the reserved tower points to obtain the display of the power grid line at the level.
In this embodiment, the specific implementation method of this step is as follows: firstly, determining a distance threshold of a level according to the zoom degree; then, connecting the Line starting point S and the Line terminal point E, marking as Line1, calculating the distance from other tower points on the Line to Line1, finding the farthest point P from the Line1, and judging whether the distance from the point P to the Line1 is smaller than the distance threshold value of the level; judging that only the Line starting point S and the Line end point E are reserved on the Line1 if the distance from the point P to the Line1 is smaller than the distance threshold value of the level; if the distance from the point P to the Line1 is greater than the distance threshold value of the level, marking the starting point S of the connection point P and the Line as Line2, and marking the ending point E of the connection point P and the Line as Line3, and repeating the step 3 on the Line2 and the Line3 until all tower points on each Line are less than the distance threshold value of the level; finally, confirming the set of pole tower points to be reserved, and sequentially connecting the reserved pole tower points to obtain the display of the power grid line at the level, wherein the process of the rarefaction treatment is shown in fig. 2a to 2 d.
And 4, establishing a GIS-based power grid line infinite scaling double-circuit line display method.
The design idea of the step is as follows: firstly, setting a double-circuit line display rule; and then repeating the step 3, and carrying out rarefaction treatment on the line until the power grid line is displayed according to the display level.
In this embodiment, the specific method for establishing the infinite scaling double-circuit line display of the power grid line based on the GIS in step 4 is as follows: firstly, setting a fixed distance between lines, and ensuring that the distance between double-circuit lines is unchanged when the double-circuit lines are displayed on a map under different zoom levels; secondly, uniformly translating the left line for a fixed distance according to the starting point and the end point of the line, and drawing a double-circuit line; based on the state, the power grid line infinite scaling optimization display method is repeatedly used until the power grid line is displayed according to the display level.
It should be emphasized that the embodiments described herein are illustrative rather than restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also includes other embodiments that can be derived from the technical solutions of the present invention by those skilled in the art.
Claims (6)
1. A GIS-based infinite scaling optimization display method for a power grid line is characterized by comprising the following steps: the method comprises the following steps:
step 1, establishing a power grid map line tower point information base;
step 2, setting a threshold value of a line rarefying distance;
step 3, determining a distance threshold of the level according to the zoom degree; whether the tower point is kept to be displayed or not is judged according to the distance threshold; confirming a set of pole tower points to be reserved, and sequentially connecting the reserved pole tower points to obtain the infinite scaling optimized display of the power grid line at the level;
and 4, setting a double-circuit line display rule, repeating the step 3, and performing rarefaction processing on the line until the power grid line is displayed according to the display level, so that the GIS-based power grid line infinite scaling double-circuit line display function is realized.
2. The GIS-based infinite scaling optimization display method for the power grid line according to claim 1, wherein the method comprises the following steps: the power grid map line tower point information base is constructed by extracting information from a GIS system.
3. The GIS-based infinite scaling optimization display method for the power grid line according to claim 1, wherein the method comprises the following steps: the specific implementation method of the step 1 comprises the following steps: firstly, establishing a tower information table, wherein the tower information table comprises tower names, tower numbers, tower types, tower point longitude information and tower point latitude information; and then, establishing a line tower relation table, wherein the line tower relation table comprises a line ID, a tower name, a tower number and a tower ID, and determining the corresponding relation between the line and the tower.
4. The GIS-based infinite scaling optimization display method for the power grid line according to claim 1, wherein the method comprises the following steps: the specific implementation method of the step 2 comprises the following steps: and setting the viewpoint heights of different levels according to the working habits of the dispatchers, setting the information quantity required to be acquired under the viewpoint height of the level, and further determining the distance threshold value used for thinning.
5. The GIS-based infinite scaling optimization display method for the power grid line according to claim 1, wherein the method comprises the following steps: the specific implementation method of the step 3 comprises the following steps:
determining a distance threshold value of a level according to a scaling degree;
secondly, a circuit starting point S and a circuit end point E are connected and marked as Line 1;
thirdly, calculating the distance from other tower points on the Line to Line1, finding the farthest point P from the Line1, and judging whether the distance from the point P to the Line1 is smaller than the distance threshold value of the level;
fourthly, if the distance from the point P to the Line1 is smaller than the distance threshold value of the level, only a Line starting point S and a Line ending point E are reserved on the Line 1;
if the distance from the point P to the Line1 is greater than the distance threshold value of the level, marking the connection point P and the Line starting point S as Line2, and marking the connection point P and the Line ending point E as Line3, and repeating the step 3 on the Line2 and the Line3 until all the tower points on each Line are less than the distance threshold value of the level;
sixthly, confirming a set of pole and tower points to be reserved, and sequentially connecting the reserved pole and tower points to obtain the display of the power grid line at the level.
6. The GIS-based infinite scaling optimization display method for the power grid line according to claim 1, wherein the method comprises the following steps: the specific implementation method of the step 4 comprises the following steps: firstly, setting a fixed distance between lines, and ensuring that the distance between double-circuit lines is unchanged when the double-circuit lines are displayed on a map under different zoom levels; secondly, uniformly translating leftwards for a fixed distance according to the starting point and the ending point of the line, and drawing a double-circuit line; and finally, repeatedly using the infinite scaling optimization display method of the power grid line until the power grid line is displayed according to the display level.
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2020
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| US7260474B1 (en) * | 2005-02-08 | 2007-08-21 | Cellco Partnership | GIS point-to-point routing for directions |
| CN102375726A (en) * | 2010-08-16 | 2012-03-14 | 北京国科恒通电气自动化科技有限公司 | Method for dynamically adjusting icon display and local topological connection display of transformer and distribution substation equipment as well as pole and tower equipment |
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| CN106970258A (en) * | 2017-04-01 | 2017-07-21 | 西安光远电气有限责任公司 | The powered recognition methods of ultra-high-tension power transmission line |
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