A method and system for constructing a map model based on coordinate transformation
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A technology of map model and coordinate transformation, applied in theodolite, road network navigator, etc., can solve the problem of inaccurate positioning
Active Publication Date: 2021-03-02
GUANGDONG POWER GRID CO LTD +1
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[0003] In order to overcome the defect of inaccurate positioning of the real scene map used in the map system described in the prior art, the present invention provides a method for constructing a map model based on coordinate transformation, and a system for constructing a map model based on coordinate transformation
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Embodiment 1
[0081] In this embodiment, a method for constructing a map model based on coordinate transformation is proposed, such as figure 1 As shown in FIG. 1 , they are respectively a flow chart of a method for constructing a map model based on coordinate transformation in this embodiment.
[0082] A method for constructing a map model based on coordinate transformation proposed in this embodiment includes the following steps:
[0083] S1: Select any coordinate point A and coordinate point B from the map, obtain the pixel coordinates of coordinate point A and coordinate point B, and measure the longitude and latitude of coordinate point A and coordinate point B with field instruments, where the longitude and latitude of coordinate point A is (lonA,latA), the latitude and longitude of coordinate point B is (lonB,latB).
[0084] S2: According to the longitude and latitude of coordinate point A and coordinate point B, calculate the angle a1 between the line connecting coordinate point A ...
Embodiment 2
[0129] This embodiment proposes a coordinate transformation-based map model construction system, which is applied to a coordinate transformation-based map model construction method proposed in Embodiment 1. like image 3 Shown is a schematic structural diagram of the coordinate transformation-based map model construction system of this embodiment.
[0130] In the map model construction system based on coordinate transformation proposed in this embodiment, it includes a map model 1 constructed from a real scene picture taken by an unmanned aerial vehicle, a latitude and longitude storage layer 2, a pixel coordinate storage layer 3, a correlation coefficient storage layer 4, and an application layer 5. in:
[0131] The latitude and longitude storage layer 2 is connected with the map model 1, and is used to store the latitude and longitude of each coordinate point in the map model 1;
[0132] The pixel coordinate storage layer 3 is connected to the map model 1 for storing the p...
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Abstract
The present invention proposes a method for constructing a map model based on coordinate transformation, which includes the following steps: selecting any coordinate point A and coordinate point B from the map, obtaining the pixel coordinates thereof, and measuring the coordinate point A and coordinate point B with field instruments Latitude and longitude; calculate the angle a1 between the line connecting coordinate point A and coordinate point B and true north, the geographic distance s1 between coordinate point A and coordinate point B; calculate the angle between the line connecting coordinate point A and coordinate point B and the Y axis a2, the pixel distance s2 between coordinate point A and coordinate point B; calculate the deflection angle a3 between the Y axis of the current map and true north; calculate the scale C of the current map; according to the scale C of the current map, coordinate point A and coordinate point B The angle a1 between the line and the true north, the angle a2 between the line connecting the coordinate point A and the coordinate point B and the Y axis, and combined with the aerial photo of the UAV for modeling, a map model based on coordinate transformation is obtained. The invention also proposes a map model building system based on coordinate transformation.
Description
technical field [0001] The present invention relates to the technical field of geographic information processing, and more specifically, to a method and system for constructing a map model based on coordinate transformation. Background technique [0002] With the continuous progress of society and the continuous development of computer information technology, various geographic information systems are applied in various fields. The current map system used in navigation and daily viewing of maps does not meet the needs of users for high-definition real-world maps. In particular, under specific requirements, such as distribution network modeling, small area modeling, etc., it is necessary to customize geographic information and In the case of insufficient geographical information in remote areas, the line network map is mainly used, while the real scene map has the problem of inaccurate positioning. Contents of the invention [0003] The present invention provides a method ...
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