Node elevation inspection and abnormal correction method of hydraulic model of water supply network
A technology of water supply pipe network and hydraulic model, applied in the field of municipal engineering pipe network information, can solve the problems that the simulation accuracy of water supply pipe network hydraulic model is difficult to meet the relevant standard requirements, information input work is negligent, node elevation errors, etc.
Active Publication Date: 2020-11-27
BEIJING UNIV OF TECH
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Problems solved by technology
[0003] During the construction of the hydraulic model of the water supply network, it was found that due to the lack or error of the elevation information of some pipe network nodes in the early stage, and the negligence of information input work, there were a lot of wrong information in the node elevation in the GIS database.
In the case of wrong basic information, the simulation accuracy of the hydraulic model of the water supply network cannot meet the relevant standard requirements
Method used
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Embodiment 1
[0033] see figure 1 with figure 2 As shown, the specific steps of the embodiment of the water supply network hydraulic model node elevation inspection and abnormal correction method of the present invention are as follows:
[0034] 1. Comparison of GIS node elevation and adjacent terrain point elevation
[0035] According to the coordinate information of GIS nodes and terrain points, find the plane distance of each GIS node A (X, Y, Z) to the nearest terrain point D (X', Y', Z'), and the three nearest terrain points of terrain point D point and calculate the average of the elevation of the three topographic points Comparing Z and Z',
[0036] If the elevation difference (Z'-Z) or At least one of them is greater than or equal to the height anomaly judgment standard low_GIS_geo=-3m and less than or equal to the elevation anomaly judgment standard up_GIS_geo=5m, indicating that the GIS node elevation is normal;
[0037] If the elevation difference (Z'-Z) and If they a...
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The invention discloses a water supply pipe network hydraulic model node elevation examination and anomaly correction method, and belongs to the technical field of municipal engineering pipe network information. According to the comparison between the elevations of nodes of a water supply pipe network in a GIS database and the elevations of terrain points of a topographic map, examination and anomaly correction are conducted on the elevations of the nodes. The method includes the steps of 1, comparing the elevations of the GIS nodes with the elevations of adjacent terrain points to screen outthe GIS nodes the elevations of which may be abnormal; 2, comparing the GIS nodes the elevations of which may be abnormal with the elevations of the adjacent GIS nodes to judge whether or not the elevation conditions of the nodes are uniform; if not, determining that elevation anomaly is caused by one GIS node and correcting the corresponding GIS node; if yes, carrying out a step 3 for examination; 3, conducting statistic judgement on terrain conditions of the GIS nodes the elevations of which may be abnormal, judging whether or not partial highland occurs on the terrain; if non-partial highland occurs, that is to say that the elevations of the whole GIS node group are all abnormal, correcting the elevations of the GIS nodes.
Description
technical field [0001] The invention relates to a method for quickly checking and abnormally correcting the node elevations according to the comparison between the node elevations of the water supply pipe network in the GIS database and the elevation points of the topographical points on the topographic map, which belongs to municipal engineering. Pipe network information technology field. Background technique [0002] With the development of pipe network information technology, establishing the hydraulic model of water supply pipe network is an important direction of modern management technology of urban water supply system. In order to ensure the accuracy of the established hydraulic model, it is necessary to check and modify the basic information of the hydraulic model of the water supply network. [0003] In the process of constructing the hydraulic model of the water supply network, it was found that due to the lack or error of the elevation information of some pipe ne...
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IPC IPC(8): G06F16/29G06T17/05G06Q50/26
CPCG06F16/29G06Q50/26G06T17/05
Inventor 吴珊寇晓霞侯本伟宋凌硕
Owner BEIJING UNIV OF TECH