40 results about "Mercator projection" patented technology

The invention discloses a method for preventing boats from colliding, comprising the following steps: performing program initialization; reading information of any two boats, predicting the track of the boats; judging whether the predicted tracks of two boats intersect, if not, returning to step 2 to continue reading the information of any other two boats to predict the tracks of other boats, if yes, calculating the intersection point, and entering the next step; calculating the intersection point, and using a Mercator projection transformation formula to calculate the distance between the intersection boats and the intersection point and a time zone from the boats to the intersection point; judging whether the time zones of two boats have intersection, if not, returning to step 2 to continue reading the information of any other two boats to predict the tracks of other boats; if yes, entering the next step; and giving alarms. The invention uses the Mercator projection transformation, which ensures that the distance between any two points is more accurate and prediction results are more correct; in addition, the invention adopts the judging method of the time zone, which can comprehensively predict time for boats to travel to a designated site, so that the reliability of the prediction result can be improved.

The invention discloses a track similarity calculating method. The track similarity calculating method includes steps of 1, collecting user space data by handholding a GPS device, and taking two tracks R and S; 2, converting longitude and latitude coordinates to a general horizontal axis Mercator projection coordinate system, and filtering the track data by a Kalman filtering algorithm; 3, combining point section distance with inter-point Euclidean distance, and calculating the improvement space distance of every point of two tracks R and S; 4, calculating the predicting distance of every point in two tracks R and S; 5, using results and intersectional angle distance of step three and step four, calculating distance of every section of two tracks R and S; 6, calculating the accumulated distance of two tracks R and S; 7, performing normalization processing on the result of step 6. The track similarity calculating method has the beneficial effect of reducing the influence of the track sampling frequency on accuracy of algorithm and improving the accuracy of track similarity algorithm.

The invention discloses a visual simulation method for an Argo float ocean product. The visual simulation method comprises the following steps: 1) building a relational data base layer, and recording information of each Argo float; 2) rapidly reading the value of an element of a to-be-drawn ocean environment from a relational data base, and implementing three-dimensional matrix storage according two concepts of time and depth; 3) constructing a grid space with the size of m*n according to the monitored position information of the Argo float, and meanwhile, converting a geometric coordinate into Mercator projection to implement linear interpolation; 4) implementing linear interpolation on the monitored data of the element of the ocean environment in the m*n grid space according to the hierarchical organization of time and space; 5) processing the boundary of the monitored scope of each Argo float; 6) and visually rendering a three-dimensional matrix with the boundary processed through an MATLAB three-dimensional simulation method. Through the method, the section simulation of the ocean product is effectively and intuitively seen, and the method is of great significance for the research and application of the ocean environment product.

The invention provides a global map data storage and organization method and a calling method. The global map data storage and organization method includes the steps of projecting a global map to a global coordinate frame, establishing a global geographic grid frame according to the global coordinate frame, slicing the global map to obtain tile data corresponding to the global map, and packaging and storing the tile data according to the geographic grid frame. The calling method includes the steps of receiving a map displaying request carrying longitude and latitude coordinates and displayinggrades, determining tile packets corresponding to the longitude and latitude coordinates according to the longitude and latitude coordinates and the displaying grades, and obtaining the tile data corresponding to the longitude and latitude coordinates from the tile packets. The complete global map is established by means of the Mercator projection in low-latitude areas and the ortho-axis azimuth projection in high-longitude areas; when the packaged and stored tiles are called, the target tile packets are retrieved from a relatively small number of tile packets, then the target tile data is retrieved from the target tile packets, the time consumed for retrieval is short, and the calling speed and efficiency of mass tiles are improved.

A navigational plotter for use with a selected navigational chart and its method for production include providing a generally transparent elongated planar straight edge member having each of a first and a second straight edges parallelly disposed opposite one another bounding a generally rectangular interior surface. A printed central axis bisecting the rectangular interior surface and at least one compass rose arranged to have its North / South ordinal points to lie upon the printed central axis thus to allow the user to maintain orientation of the plotter on the chart. A first distance scale is calibrated in accord with the scale of the selected chart along a selected line of latitude. The first distance scale is printed to span the East / West ordinal points on the compass rose and along the first straight edge. A second distance scale is calibrated in accord with longitude according to a Mercator projection.

The invention discloses a GIS-based satellite coverage area rapid simulation method, which specifically comprises the following steps of: calculating geocentric angles of a satellite to-ground coverage domain and a satellite to-air coverage domain, and obtaining the geocentric longitude and geocentric latitude of a sub-satellite point by a spherical trigonometric formula; solving spatial data models of boundaries of the satellite to-ground coverage domain and the satellite to-air coverage domain; sequentially carrying out classification correction and Mercator projection processing on the spatial data models of the boundary of the satellite to-ground coverage domain and the boundary of the satellite to-air coverage domain to obtain spatial data models of the coverage domain boundaries on aMercator graph; and processing the spatial data models of the coverage domain boundaries on the Mercator graph through a GIS mapping technology to obtain a coverage domain Mercator projection graph of the satellite to a celestial sphere and a constellation coverage image generated by superposing a plurality of satellite coverage domains. The spatial data models of the coverage domain boundaries are classified and corrected, so that the geometric objects of the coverage domain boundaries can be created directly based on the azimuth angle algorithm for region filling, and coverage judgment point by point in the region is not needed.

The invention discloses a self-adaptive threshold compression ship track compression method which comprises the following specific steps: (1) data preprocessing: decoding a ship AIS (Automatic Identification System) of a water area and cleaning abnormal track points; (2) track point coordinate conversion: converting original geographic coordinates into Mercator projection; (3) calculating a point-to-line distance; (4) calculating an optimal threshold change rate; (5) calculating the threshold change rate of each track point; (6) compressing a single track; and (7) compressing all tracks. The method solves the problems that a traditional compression method is low in compression efficiency, poor in compression effect and even failed in compression, is only suitable for simultaneous compression of a single water area and is not suitable for simultaneous compression of multiple water areas, and has the advantages of being high in operation efficiency, stable in compression effect, free ofthreshold setting and the like.

The application discloses a drawing method and apparatus for a distribution area. The method comprises: with a Mercator projection method, a latitude and longitude coordinate of a distribution station is converted into a horizontal coordinate S0 (x0, y0); according to the horizontal coordinate S0 (x0, y0), a preset radius of a distribution area, and a preset boundary drop point number N, horizontal coordinates of all drop points distributed uniformly at the boundary of the distribution area of the distribution station are determined; the horizontal coordinates of all drop points are converted into corresponding latitude and longitude coordinates; and on the basis of the latitude and longitude coordinates of all drop points, the distribution area is identified on a map. With the method and apparatus, the drawing efficiency of the distribution area can be improved effectively and the accuracy is high.

The embodiment of the invention discloses an interest point POI recommendation method and device based on location based service LBS. The method comprises the steps that a target area is determined according to current position information of a user, the target area is a geographic position range obtained by dividing an electronic map based on Mercator coordinates, and the Mercator coordinates arecoordinates obtained through Mercator projection; a to-be-recommended target POI is obtained in the target area, the target POI is at least one POI selected according to influence, the influence comprises at least one of area influence, area influence of a smooth window or multi-area fusion influence; the target POI is output. By adopting the embodiment of the invention, the influence of the POIcan be accurately evaluated, and the service quality of the LBS is improved.

The invention discloses a method for generating and publishing a tile map based on CAD (Computer-Aided Design) data. The method comprises the following steps: sorting the CAD data, and adjusting the reference size of a block and the line width of line elements; visualizing the CAD data, determining a view scale according to a data range, and ensuring that graphic elements are clear and visible; determining a DPI parameter according to the view scale and the image output resolution; establishing a rectangular grid covering the whole map, and setting a DPI parameter framing output map under a fixed scale; carrying out coordinate transformation on the output grid map, and transforming an engineering coordinate system into a Mercator projection coordinate system; and slicing and publishing thetile map after coordinate conversion to generate a network map service. CAD data in the vector format is converted into a raster picture a tile map is generated and published, the problem that a vector file publishing network service slicing scheme is complex is solved, meanwhile, the symbolization effect of cad data is kept in a lossless mode, and rapid publishing of the vector data is achieved.

The invention discloses a method for coding an earth surface image through dividing, comprising the following steps of: dividing an entire earth image (not containing high-latitude regions over southern and northern latitude of about 85) subjected to Mercator projection, respectively forming four images with peaks of four corners of the image by taking the center of the image as a peak, and then respectively dividing the four divided images in the same way until the divided earth surface images meet the required requirement; and coding each divided image, wherein each image has a special territorial scope and a code. By using the coding way for describing two-dimensional region information by using one-dimensional variable quantity, the retrieval efficiency of the image is greatly increased; and the original earth surface image data obtained through a satellite remote sensing technology can be used for creating an image database after projection transformation and coding through dividing.

The invention discloses a power grid geographical wiring diagram automatic generation method and device, and the method comprises the steps of carrying out the initial layout and local offset of all A-class along distribution units and B-class along distribution units, and obtaining all node equipment layout diagrams of the A-class along distribution units and the B-class along distribution units under a rectangular coordinate system; for the layout of the line equipment in all the A-type along cloth units and the B-type along cloth units under the rectangular coordinate system, obtaining all line equipment layout diagrams; combining the line equipment layout diagram with the node equipment layout diagram to form a power grid layout diagram; converting rectangular coordinates of the node devices and the line devices in the power grid layout diagram into geographic coordinates through Mercator projection, marking the node devices and the line devices on a geographic map according to the converted geographic coordinates, and finishing automatic generation of the power grid geographic wiring diagram. According to the a power grid geographical wiring diagram automatic generation method and device, the mapping efficiency and the equipment identification degree in the diagram are remarkably improved, and the method and device can be used for businesses such as power grid equipment management, operation and maintenance and the like.

The invention relates to a Mercator map projection demonstration device and a demonstration method. The demonstration device comprises a base, a bulb and a light-transmitting globe main body, wherein the bulb and the light-transmitting globe main body are arranged on the base. The bulb is arranged at the place of a globe center of the globe main body; the outer surface of the globe main body is marked with a deformation verification triangle, longitude and latitude lines and an equator; the globe main body is externally covered by a transparent map paper cover; the transparent map paper cover is cylinder in shape, and the center shaft thereof is overlapped with the earth axis of the globe main body; and the diameter of the transparent map paper cover is equal to the diameter of the equator of the globe main body, and the height of the transparent map paper cover is equal to the earth axis of the globe main body. The Mercator map projection process is demonstrated visually through a simple method, and meanwhile, the deformation verification triangle and a length verification line are utilized to demonstrate the deformation property of Mercator map projection vividly; and the demonstration device is convenient to get materials and easy to produce, can enable the abstract theory teaching to become visual and vivid, and greatly improves teaching effect of cartography.

The invention relates to a three-dimensional space situation representation method and device of a height information enhanced Mercator map, computer equipment and a storage medium. The method comprises the following steps: by acquiring Mercator projection map data, establishing a longitude and latitude high-altitude isometric projection rectangular coordinate system by taking a Mercator projection map as an XY plane, forming a space situation three-dimensional representation space, directly acquiring or calculating through a preset formula to obtain a longitude value, a latitude value and a height value of a to-be-represented object in a geographic coordinate system; and obtaining an isometric projection coordinate value in the longitude direction and an isometric projection coordinate value in the latitude direction of the to-be-represented object in the longitude and latitude high-altitude projection rectangular coordinate system through a preset conversion relation, setting a height value, and drawing the to-be-represented object in the spatial situation three-dimensional representation space by adopting a visualization technology. According to the method, the distance relation illusion between the spacecrafts caused by height loss can be avoided, and particularly, the method has a very good effect in the aspect of representing the relation between the synchronous orbit spacecrafts and the spacecraft ground.

The invention relates to a method for picking up longitude and latitude information and description information of a ground object from a publicly published scattered planning map picture. The basic principle of the method is that on the urban scale, it is assumed that all planning maps are Mercator projection type maps and are strictly managed by planning departments, so that the standard spatialgeographical relationship is kept, and therefore the conversion algorithm of planning place pixel coordinates, Internet map Mercator coordinates and geodetic longitude and latitude coordinates is determined. The method comprises the following basic steps: 1, establishing a proportional relation between planning place image pixel coordinates and Internet map Mercator coordinates through positioning points; 2, drawing on a planning map by using tools such as a marking tool, a circle drawing tool, a multi-fold line tool, a multi-square tool and a rectangle tool; 3, drawing a corresponding graphon an Internet map through a simultaneous display function so as to visually assist information pickup; 4, inputting corresponding description information into a drawing graph of the planning map; and5, carrying out layering and duplicate removal on the surface feature longitude and latitude and description information obtained through graphical assistance, and then storing the information in anurban planning database.

The invention belongs to the technical field of garbage disposal, and particularly relates to an electronic map generation method and device and an electronic map. The electronic map generation methodcomprises the steps: obtaining a two-dimensional dot-matrix map obtained after an intelligent garbage truck scans a specific area; generating a new regional map according to the two-dimensional dot-matrix map; acquiring a target acquisition point in a new map of the region; acquiring acquisition point two-dimensional dot matrix coordinates corresponding to the target acquisition points in the two-dimensional dot matrix map; acquiring acquisition point Mercator projection coordinates corresponding to the acquisition point two-dimensional lattice coordinates; and calculating coordinates of a target acquisition point based on the two-dimensional four-parameter model according to the acquisition point two-dimensional dot matrix coordinates and the acquisition point Mercator projection coordinates. The intelligent garbage truck can precisely navigate to the actual target point in the specific area according to the position point in the new area map, coordinate elements in the new area mapare matched with coordinate elements of an actual object, precise navigation during garbage collection is achieved, and the garbage collection efficiency is improved.

The invention discloses a virtual parcel block chain data management method based on Mercator projection. The method comprises the steps of projecting an earth surface to a plane-coordinate system asrequired through a Mercator projection law, and dividing the projection into a plurality of rectangular small virtual parcels, and positioning the earth surface projection to the belonged small virtual parcel through any real latitude / longitude coordinate; the projection of the earth surface is managed by using the block chain, so that the centralization feature of the transaction data managementof the virtual parcel of the earth surface project is removed, and all nodes can possess effective accurate data and reach a consensus; even if the center server is subjected to the attack, the tampering and like devastating blow, the transaction data can be quickly retrieved; and the problem that the various data concurrency is increased since each node is connected with the server is greatly reduced.

The invention discloses a ship collision bridge risk degree calculation method considering ship scale, which comprises the following steps of establishing a plane rectangular coordinate system, performing rectangular coordinate conversion on the geographic positions of a bridge and a ship by adopting a Mercator projection method according to a bridge area channel warning range, and designing a method for projecting the ship on the axis of the bridge along a channel direction, and constructing a risk degree algorithm of ship collision bridge by using the distance between the projection point and the bridge pier center point. According to the algorithm, the influence of the ship size on the ship collision bridge risk degree is fully considered, the ship collision bridge risk degree interval is obtained from the transverse direction through a geometric analysis method, the algorithm is made to better conform to the actual situation, on the basis of the high-precision ship collision bridge risk degree, the ship collision bridge active early warning prediction strategy is further put forward, and through the early warning strategy, the accuracy of early warning is improved, the reliability and practicability of the system are improved, and the common safety of the bridge and the ship is guaranteed.

The invention relates to an implementation method of a humanoid robot touch housing based on elastic wave recognition. The robot touch housing applying the method comprises a cambered housing, a groupof signal processing elements, and at least one group of elastic wave acoustic-electric transducers; four top points of the inside surface of the cambered housing of the touch housing are respectively occupied by four elastic wave acoustic-electric transducers. The method is applicable to making cambered touch housing parts of a humanoid robot, which can be integrally assembled to enter a humanoid robot to be used as the head part or back part components, and clicking touch interaction between a user and the humanoid robot is realized; according to the touch housing made by adopting the method disclosed by the invention, by research and experiment on the transfer characteristics of elastic waves on common robot housing materials, special design is performed on the signal processing mannerof the elastic waves, and Mercator projection is adopted for positioning of a touch position on the cambered housing, so that interaction function design and signal processing are simplified.

The invention provides a map tile conversion method, system and device and a storage medium. The method comprises the following steps: determining the arrangement of each tile in each level of tiles in Mercator projection according to the longitude and latitude range of each level of tiles of map tiles in a WGS84 coordinate system; creating a blank data carrier corresponding to each tile in the Mercator projection; determining an XY coordinate range of each blank data carrier in the Mercator projection according to the arrangement of each tile in the Mercator projection; according to the XY coordinate range of all blank data carriers in the Mercator projection, determining tiles corresponding to the blank data carriers in map tiles in the WGS84 coordinate system; and copying the determined image data in the corresponding tile to a blank data carrier, wherein the blank data carriers of all copied image data form the map tile under the Mercator projection after conversion. The method does not need vector data of a WGS coordinate system, and does not need to convert vector data of a WGS84 coordinate system into vector data of a Mercator coordinate system and re-layer dicing and image cutting.

The invention belongs to the field of aircraft route design, and relates to amethod and device for determining an equal-interval large-circle route. The method comprises the following steps: S1, determining longitude and latitude of a starting point and an end point of a great circle route; s2, according to a positive calculation formula of Gauss-Kluger projection, calculating plane coordinates of the large circle airline corresponding to the starting point and the terminal point; s3, calculating the distance between a starting point and an end point under the plane coordinates of the great circle route; s4, dividing the distance between the starting point and the terminal point under the plane coordinate of the large circle route according to a set interval, and calculating the plane coordinate of each interval point; and S5, converting the plane coordinate of each interval point into longitude and latitude by utilizing a back calculation formula of Gaussian Kruger projection. The problem that traditional Mercator projection seriously deviates from a great circle route in a high latitude area is solved, so that the route is closer to a real earth great circle route, and the economic principle of remote navigation is met.

The invention discloses an image conversion method and device, and relates to the technical field of computer vision. According to the specific scheme, the method comprises the steps that computer equipment determines a three-dimensional map meeting the Mercator projection principle through a preset three-dimensional rendering target in a virtual three-dimensional space, and determines the position of a pixel point in the three-dimensional space according to the size of the three-dimensional map and the position of any pixel point in the three-dimensional map, then, according to the positions of the pixel points in the three-dimensional space and a preset fisheye camera distortion coefficient, the distortion characteristics of the pixel points are determined, and according to the distortion characteristics, the preset size of the fisheye image and the position of each pixel point in the three-dimensional map, the position of each pixel point in the fisheye image is determined, and finally, dyeing processing is carried out on each pixel point in the fisheye image to obtain the fisheye image corresponding to the three-dimensional chartlet. The fisheye image conforming to the equidistant projection model can be obtained, and the authenticity of the fisheye image obtained from the virtual three-dimensional space is improved.

The invention relates to an AR navigation content generation method and system.The AR navigation content generation method comprises the steps that according to a navigation starting point and a navigation ending point, a path planning algorithm is executed, a navigation path under a point cloud algorithm coordinate system is obtained, and the navigation path comprises a plurality of path points; fusing the earth geographic coordinate system, the universal horizontal axis Mercator projection coordinate system and the point cloud algorithm coordinate system to determine attribute information of each path point; according to the attribute information of the waypoint, the AR navigation content corresponding to the waypoint is generated, the problem that in the related technology, indoor AR navigation lacks waypoint longitude and latitude information and orientation information under an earth geographic coordinate system is solved, and therefore a user can conveniently find the position of a destination according to the navigation information.

The invention discloses a method for calculating the risk degree of a ship hitting a bridge considering the scale of the ship. By establishing a plane rectangular coordinate system and using the Mercator projection method to convert the geographical position of the bridge and the ship according to the warning range of the bridge area, the rectangular coordinates are designed. The method of projecting the ship on the bridge axis along the channel direction uses the distance between the projected point and the center point of the pier to construct the risk algorithm of ship collision with the bridge. This algorithm fully considers the influence of ship size on the risk of ship collision with bridge, and uses the geometric analysis method to obtain the risk interval of ship collision with bridge from the horizontal direction, so that the algorithm is more in line with the actual situation. , and further proposed an active early warning and prediction strategy for ship collision with bridges. Through the above early warning strategy, the accuracy of early warning can be improved, the reliability and practicability of the system can be improved, and the common safety of bridges and ships can be guaranteed.

The present application discloses a method and device for drawing a delivery area, wherein the method includes: using the Mercator projection method to convert the latitude and longitude coordinates of the delivery site into plane coordinates S 0 (x 0 ,y 0 ); According to the plane coordinate S 0 (x 0 ,y 0 ), the radius r of the preset delivery area and the preset boundary drop point number N, determine the plane coordinates of each drop point evenly distributed on the delivery area boundary of the delivery site; the plane coordinates of all the drop points The coordinates are converted into corresponding latitude and longitude coordinates; and the delivery area is identified on the map according to the latitude and longitude coordinates of all landing points. By adopting the present invention, the drawing efficiency of the distribution area can be effectively improved and the accuracy is high.

The invention relates to an auxiliary field lofting method based on Google Earth. The auxiliary field lofting method based on Google Earth comprises the following steps: picking up Google Earth Mercator projection coordinate values, carrying out correlation calculation, carrying out regression fitting, and calculating Mercator projection coordinate values corresponding to coordinates X and Y of a point to be lofted. According to the method, Google Earth software is used for visually interpreting high-grade control points in a construction area and extracting coordinate values; a function relationship between the advanced control point coordinates of the construction area and the visually interpreted coordinate values is established. After the coordinates of the point to be lofted after calculation are marked in the Google Earth, the position information of the specific point to be lofted can be mastered, the conventional lofting efficiency can be improved, and the purposes of shortening time and saving cost are achieved.

The invention provides a global map data storage and organization method and a calling method. The global map data storage and organization method includes the steps of projecting a global map to a global coordinate frame, establishing a global geographic grid frame according to the global coordinate frame, slicing the global map to obtain tile data corresponding to the global map, and packaging and storing the tile data according to the geographic grid frame. The calling method includes the steps of receiving a map displaying request carrying longitude and latitude coordinates and displayinggrades, determining tile packets corresponding to the longitude and latitude coordinates according to the longitude and latitude coordinates and the displaying grades, and obtaining the tile data corresponding to the longitude and latitude coordinates from the tile packets. The complete global map is established by means of the Mercator projection in low-latitude areas and the ortho-axis azimuth projection in high-longitude areas; when the packaged and stored tiles are called, the target tile packets are retrieved from a relatively small number of tile packets, then the target tile data is retrieved from the target tile packets, the time consumed for retrieval is short, and the calling speed and efficiency of mass tiles are improved.

The invention discloses a registration method of 2.5D (two and a half dimensional) maps. The method includes: converting a two-dimensional vector graph in a base graph, or a photographic map into a Mercator projection of JPG (joint picture group) format, rotating and compressing vector and raster data of the Mercator projection of JPG format in an ArcMap module, rotating and compressing a photographic file in the base graph not rotated and compressed, in 3Dsmax to generate a 3D rendering, setting the width and height of the 3D rendering to be equal to that of an original image of the rendering, rotating and compressing the new 3D rendering of new width and height to generate a JPG image of same height and width, replacing an original JPG image file of the rendering by a JPG file of the new 3D rendering, reading the new 3D rendering into the ArcMap module, and performing adjusting to generate a 2.5D map. The method has the advantages that seamless integration and splicing of 2D and 3D maps is achieved, a simulation 3D map registered and integrated allows national roaming on the same map, geographical coordinates are located and queried on the same map, and using is more convenient.

The present invention proposes a large data analysis method for farmland areas based on satellite remote sensing images, which analyzes point and polygon overlay, line and polygon overlay, and layer overlay analysis through overlay analysis to form a map database; The spatial data in the data files, including point layer files, line layer files, and surface layer files, are released uniformly according to the Mercator projection to form a planar map database; the aggregation function is used to realize dynamic vector slicing of spatial data, and the planar map database Data information is encoded into vector slices, saved as vector block data of various scales, forming a vector slice map; the front end displays the vector slice map, and provides catalog and metadata services, map services, feature services, image services, and 3D maps Service, place name address service and spatial data service to support the application of big data in farmland areas.