41 results about "Scale (map)" patented technology

The invention provides a map model construction method based on coordinate transformation. The map model construction method comprises the steps of selecting an arbitrary coordinate point A and an arbitrary coordinate point B from a map, obtaining pixel coordinates of the arbitrary coordinate point A and the coordinate point B, and measuring the longitudes and latitudes of the coordinate point A and the coordinate point B by adopting a field instrument; calculating an included angle a1 between a connecting line of the coordinate point A and the coordinate point B and the north, and a geographic distance s1 between the coordinate point A and the coordinate point B; calculating an included angle a2 between a connecting line of the coordinate point A and the coordinate point B and a Y axis, and a pixel distance s2 between the coordinate point A and the coordinate point B; calculating a deflection angle a3 of the Y axis and the north of the current map; calculating a measuring scale C of the current map; according to the measuring scale C of the current map, the included angle a1 between the connecting line of the coordinate point A and the coordinate point B and the north, the included angle a2 between the connecting line of the coordinate point A and the coordinate point B and the Y axis, carrying out modeling by combining the aerial photography real scene of an unmanned aerial vehicle, and thus obtaining a map model based on coordinate transformation. The invention also provides a map model construction system based on coordinate transformation.

The invention relates to the technical field of map fusion, in particular to a map fusion method suitable for a sub-map with few overlapping parts. The method comprises: firstly, iteratively calculating a rotation matrix R by using point cloud plane extraction, normal vector estimation and normal vector projection angle statistics methods, then iteratively transforming source point clouds by usingthe R, finally, performing three-view projection on the two groups of point clouds to obtain two groups of grey-scale maps, and calculating a translation vector t by using a phase correlation methodfor the grey-scale maps; and finally obtaining a transformation matrix (R, t) between the two groups of point clouds. According to the map fusion method suitable for a sub-map with few overlapping parts, the fusion of the sub-maps under the low overlapping degree can be correctly completed, the error of searching corresponding points by the previous methods is avoided, and the method is suitable for the registration between two groups of large map point clouds with fewer overlapping parts and three axes having rotating angles at the same time.

The invention particularly relates to a drawing exporting method based on exterior line resources. The drawing exporting method based on the exterior line resources comprises the following steps: segmenting a current page map to obtain sub-maps with accurate longitude and latitude calibration ranges; the background determines a map object of each sub-map through longitude and latitude, and obtainsa label for each map object; splicing the sub-maps to obtain a clear drawing; after a user locates the map position needing to be exported, the drawing type needing to be exported is selected, and adrawing exporting task is generated and executed. The invention discloses a drawing exporting method based on exterior line resources. The corresponding size can be derived according to user requirements; according to the drawing with the length-width ratio and the proportional scale, engineering is led out to the drawing, personnel for leading out the drawing, starting time and ending time can berecorded. Meanwhile, the led-out drawing has high resolution, the situation of leading out the drawing can be previewed, adjustment is conducted according to actual requirements, and therefore the drawing with detailed information is led out for a user.

The invention relates to a geographic coordinate in large scale map application and measurement method and a map for implementing the same method. The method of reading the geometric coordinates of the large-scale map comprises the following steps: capturing a vertical distance from the target point to the left longitude or the lower parallel, and reading the geographical coordinates directly on the map edge line near the target point. The large-scale map for implementing the method employs the geometric coordinate network. The indexing zone difference of the adjacent latitude and longitude lines is one point. Each indexing zone is marked with the degree value. Each indexing zone is scaled by second values on the outer edge line. The method process is simplified and the efficiency is high. The line searching error, the line connection error and the reading error of the map user are reduced. The number reading and the formulation calculation are not required, the speed is increased, and the error is reduced. The dependence on the measurement tools such as long rulers and calculators of the personnel is reduced. The map loss is reduced, the manpower and material resources are saved, and wastes of map printing resources are reduced.

The invention provides a map alignment method and system based on collaborative VSLAM. In the method provided by the invention, the method comprises the steps: correspondingly establishing a pluralityof maps based on a current environment through a plurality of VSLAM systems, and then analyzing the plurality of maps to determine matching feature points among the plurality of maps; merging the plurality of maps into a joint map based on the matching feature points, and finally optimizing the residual errors of the merged joint map to realize alignment of the plurality of maps. Based on the method and system provided by the invention, ORB-SLAM is selected as a framework, the feature matching and map alignment of key frames are researched, calculation is performed for scale proportion factors of different maps, and the mapping precision of VSLAM is further improved.

The invention discloses a site pollutant description method and system based on directional smooth constraint inversion. The method comprises the following steps: acquiring resistivity difference interface information on a structural boundary of a polluted site according to drilling data and geological survey data of the polluted site; constructing a grey-scale map according to the resistivity difference interface information; quantizing the grey-scale map into a plurality of local grey-scale maps; calculating structure tensors of the plurality of local grey-scale maps, and calculating diffusion tensors and similarities according to the structure tensors; determining a final resistivity difference interface for the resistivity difference interface according to the similarity; calculating smooth weight coefficients of the final resistivity difference interface in four directions according to the diffusion tensor; constructing a four-direction weighted smooth matrix according to the smooth weight coefficients in the four directions, and substituting the four-direction weighted smooth matrix into an inversion algorithm to obtain an inversion resistivity prediction model; and determining a site pollutant distribution range according to the inversion resistivity prediction model. The method improves the accuracy of resistivity inversion, and enables the determination of the spatial distribution range of pollutants to be more accurate.

The invention discloses a thematic map sheet planning method. The thematic map sheet planning method comprises planning mainly based on a map sheet, planning mainly based on a proportional scale and planning mainly based on thematic information, wherein the planning mainly based on the map sheet comprises three steps of determining an initial scale, determining a mapping scale and determining a mapping geographical range. The planning based on the proportional scale comprises three steps of determining an initial map sheet, determining a mapping map sheet and determining a mapping geographicalrange. The planning mainly based on the thematic information comprises four steps of determining a target geographic range, determining an initial scale of each scheme, determining a mapping scale ofeach scheme and determining a mapping geographic range. The three planning methods are selected according to actual requirements, and are extremely high in universality, high in practicability, simple to operate and high in efficiency. The method can be applied to thematic drawing in different fields, and a good solution is provided for drawing planning in the earlier stage of drawing.

The invention discloses a depth map enhancement method and device, and the method comprises the steps: obtaining an initial depth map from original visual data, carrying out the alternate convolution of the initial depth map, carrying out the multi-scale feature extraction of a deconvolution module, obtaining a feature view, carrying out the scale compression and convolution, and sequentially obtaining the feature vectors of two stages; and performing spatial transformation and feature extraction on the initial depth map to obtain depth map features, reinforcing the depth map features based on the feature vectors of the two stages, recovering a depth structure, generating a feature map, and further obtaining a final depth map through multi-layer perceptron mapping. Therefore, the technical problems that in the prior art, due to the fact that the target object needs to meet certain specific geometric symmetry and then feature extraction and prediction are conducted, it is difficult to use a universal enhancement model to conduct completion and densification of geometric features in the depth collection process, and information is incomplete and precision is low in collection are solved.

The invention provides a map annotation display method and device based on inheritance characteristics. The method comprises the following steps: extracting map annotations contained in scale maps ofdifferent levels from existing map data, and assigning unique annotation points ID for the extracted map annotations; reading the annotation points ID of the map annotations displayed on the scale mapof all levels respectively, and recording the annotation points ID in a preset list; obtaining the annotation points ID of the map annotations contained in the scale map of any level, judging whetherthe map annotations contained in the scale map of any level are displayed in the adjacent level scale map according to the annotation points ID recorded in the preset list, and if yes, increasing thedisplay priority of the map annotations contained in the scale map of any level and displayed in the adjacent level scale map. Therefore, according to the embodiment of the invention, the priority ofthe map annotations in the scale maps of adjacent levels is increased by weighting the inheritance specific gravity so as to improve the consistency of map annotation display in the scale map of alllevels.

The invention discloses a 12-to-12 zero-error physiological standard map positive sphere and ellipsoid waist drum projection law, relates to the technical field of standard maps, and aims to solve the problems that all maps smaller than a 12-to-1686666.6) 2 scale in the current world are all full-pseudo maps, all maps larger than or equal to the 12-to-1686666.6) 2 scale are half-pseudo maps, and all the maps are not all-pseudo maps. Therefore, the law of the regular sphere and the ellipsoid waist drum in the standard map needs to be reset. The method comprises the following steps: 1, determining a positive ball waist drum projection; 2, determining a projection of an ellipsoid waist drum; 3, enabling projection data to have zero errors, enabling angle deformation to be equal to absolute zero, enabling length deformation to tend to be absolute zero, enabling area deformation to tend to be absolute zero; 4, determining that a completely overlapped range on the spherical surfaces of the geosphere and the green sphere is an effective range of the basic projection; and step 5, determining the effective range of the basic projection in the range of complete coincidence on the spherical surfaces of the geodesic ellipsoids and the geodesic ellipsoids.