62 results about "Geographic coordinate conversion" patented technology

A method for editing composite geographical images, including importing a raster geographical map file, the raster file including geographical information identifying raster image data, global positioning reference data and a first projection that transforms geographical coordinates to linear coordinates, importing a vector geographical map file, the vector file including geographical information identifying vector objects, rendering a two-dimensional raster image including transforming linear coordinates to geographical coordinates according to the inverse of a prescribed second projection that transforms geographical coordinates to linear coordinates, and re-projecting the geographical coordinates to linear coordinates according to the first projection, rendering a two-dimensional vector image including projecting the vector objects according to the prescribed second projection, compositing the two-dimensional image raster image and the two-dimensional vector image as layers of a composite image, and editing the composite image. A system and a computer readable storage medium are also described and claimed.

The invention discloses a method for constructing a full-space three-dimensional digital earth model. The method includes that an ellipsoid earth space mathematical model is constructed based on a center of gravity control system (CGCS) 2000 China geodetic coordinate system; an earth surface dissection network is generated based on a fictitious graticule; an earth surface digital elevation model is generated in an insertion mode; a geometric structure module of earth space inner and outer ring layers is fitted by interpolations; a three-dimensional body element mesh of the earth space inner and outer ring layers is generated based in geological cells; an attribute element three-dimensional distribution model of the earth space inner and outer ring layers is fitted by the interpolations; a geographical coordinate is converted into a geocentric space three-dimensional rectangular coordinate; an earth space model multi-scale expression mechanism based on level of detail (LOD) is constructed; three-dimensional visualization is performed; earth space positions are checked; and three-dimensional analysis is performed. According to the method, the automaticity and the adaptability are high, and an earth space solid model containing the inner and outer ring layers can be rapidly and automatically reconstructed in three-dimensional space to be displayed on a computer display screen in a three-dimensional visualization mode to support space analysis of various professionals.

The invention discloses a design method of a ground station three-dimensional navigation map of a small unmanned air vehicle. The method comprises the steps of Google Earth application program interface (API)-based map data acquisition, geographical coordinate conversion and navigation function implementation. Network map data of a flight area can be stored into a local two-dimensional array by a Google Earth API; map data is drawn into a ground station navigation map area by a three-dimensional drawing interface, so that a three-dimensional map can be formed; flight destinations of the unmanned air vehicle are inquired in local map data and are drawn in the three-dimensional map, so that the three-dimensional map navigation function can be realized. By virtue of the method, the three-dimensional navigation map with low cost can be provided for a ground station of the small unmanned air vehicle, the map display intuition is improved, and the flight safety of the unmanned air vehicle can be improved under complex terrain conditions.

The invention provides a real-time street view navigation method and device. The method comprises the following steps of: sending a navigation route acquisition request including a geographic coordinate of a current position of a terminal and positional information of a destination to a network-side device, and receiving navigation route information generated by a network side; determining the geographic coordinate of the current position of the terminal through GPS (Global Positioning System) information received by the terminal at the current position; transforming the geographic coordinates of all navigation points in the navigation route information into pixel coordinates on a display screen according to the geographic coordinate of the current position of the terminal and a horizontal angle and a vertical angle which are monitored by a sensor of the terminal, and displaying the transformed navigation route information on the display screen of the terminal; and collecting real-time street view of the position at which the terminal is located by an acquisition unit of the terminal in real time during driving and displaying the street view on the display screen, determining the current navigation point matched with the geographic coordinate in the received GPS information in real time from the all navigation points of the navigation route information, and displaying the current navigation point in a displayed navigation route on the display screen.

This invention relates to a full-digitized field information acquisition, recording and processing method for land survey. Wherein, it uses field portable device integrated all of space geometrical data real-time high-precision acquisition, field forming image, attribution information field record, data measurement and graphic edition, as well as the wireless network communication, serial port / blue tooth communication, space geographic coordinate conversion, and different graph data composition. This invention realizes WYSIWYG, decreases labor strength, and improves operating efficiency with paper free, real time, and intelligentization.

The invention relates to comprehensive geographical spatial data coordinate conversion method and system. The method comprises the following steps: setting a source coordinate format and a target coordinate format; setting a source coordinate system and a target coordinate system; selecting a conversion mode and a conversion model of coordinate conversion, and setting a conversion parameter of the coordinate conversion; inputting coordinate data of a known control point in the source coordinate system and the target coordinate system; calculating coordinate conversion parameters according to the coordinate data of the known control point; and converting the coordinate data of a to-be-converted point in the source coordinate system into the coordinate data of the target coordinate system according to the coordinate conversion parameters. The comprehensive geographical spatial data coordinate conversion method and system can be used for achieving space coordinate conversion between geographical spatial data with different formats and different coordinate forms, proportional scales and coordinate systems, achieving conversion and calculations such as projection and band change of geographical spatial data achievements between different coordinate systems, and achieving conversion parameter calculation and accuracy assessment; meanwhile, the input process of the coordinate data of the control point is simple; and the coordinate conversion efficiency is high.

The invention relates to a three-dimensional imaging measurement system combining planar array imaging with laser scanning, comprising a laser scanning device and at least one planar array imaging equipment camera installed at the periphery of the laser scanning device, wherein the scanning coordinate system of the laser scanning device is XYZ, and the image coordinate system of the at least one planar array imaging equipment camera is X'Y'Z', and omega and kappa are respectively the space included angles of the image coordinate system and the scanning coordinate system X. The three-dimensional imaging measurement system is characterized in that the optical axis of the at least one planar array imaging equipment camera is spatially vertical to or parallel to the scanning surface of the laser scanning device so that any two space included angle values of the omega and the kappa are zero. In the invention, the spatial geometrical relationship between the image coordinate system and the scanning coordinate system is achieved only by single coordinate rotation and single coordinate conversion, thus the matching computation of laser point cloud data and camera image collection data can be simplified, and the fusion superiority of the laser point cloud data obtained by the scanning device and the image data collected by the cameras can be improved.

The invention discloses a GNSS ionization layer delay precise modeling method suitable for a Chinese region. The geographical coordinates of the latitude and the longitude of a cross point are converted into coordinates under an established spherical crown coordinate system, so as to acquire the range of the latitude and the longitude of the cross point under the spherical crown coordinate system. The change range of the latitude and the longitude of the cross point is projected and converted into a global coordinate system. A spherical harmonic function is used to establish a regional ionization layer total electron content (TEC) model. The ionization layer delay precise modeling method suitable for the Chinese region is constructed. Compared with the existing method, the method provided by the invention has the advantages that through rotation projection and conversion, the distribution of the ionization layer cross point meets the requirement of the spherical harmonic function on physical quantity distribution in the form; ill-conditioned problems are solved when the spherical harmonic function is applied to regional modeling; the precise describing ability of the spherical harmonic function for global change physical quantity is effectively used; non-integral order in a spherical crown harmonic function is avoided; and the complexity of ionization layer TEC modeling calculation is reduced.

The present invention provides a coastline area remote sensing map-based satellite borne spectrograph pointing registration method. According to the method, under a nadir observation mode, pointing registration is performed through using the characteristic that large-area uniform landforms exist in a special ground feature-coastline area in a high-and-middle-resolution remote sensing image and the characteristic that surface reflectance changes abruptly; the longitudes and latitudes of measurement points of a satellite borne spectrograph in an observation area are in one-to-one correspondence with the longitudes and latitudes of the pixels of a remote sensing image outputted by a remote sensing camera in a corresponding area; and the errors of the longitudes and latitudes of the measurement points and the longitudes and latitudes of the pixels are corrected, and are put into statistics and are monitored in real time. Arithmetic processing such as spectral data fitting and comparison and pixel grid geometric coordinate transformation is adopted; and a reference base map required by the pointing registration of the satellite borne spectrograph can come from other satellite loads, that is, the satellite borne spectrograph can be in non-rigid coaxial connection with the remote sensing camera, or the reference base map required by the pointing registration of the satellite borne spectrograph can come from different satellites, and thus the application range of the registration method of pointing between the non-imaging satellite spectrograph and the imaging remote sensing camera can be extended.

A method for customizing a local map with a grid that can be rotated and zoomed includes the steps of (a) defining a grid on a map; (b) generating a grid set-up data as a function the defined grid; and (c) employing a computer based device in a manner to receive the grid set-up data and convert a geographical coordinate to a local coordinate on the map. A device for such use includes a computer based device having a processor, a memory operably association with the processor, a power source, means for receiving a geographical coordinate; and geographical coordinate conversion software operably disposed in the memory and operably associated with the processor in a manner to in a manner to receive grid set-up data and convert the received geographical coordinate to a local coordinate on the map.

The invention discloses a base station position locating method based on road test data. The method includes: collecting base station signal road test original data, and performing polar coordinate conversion on the original data; whitening converted data; performing k-means clustering on whitened data, and determining a data central point; performing polar coordinate reversion on the determined central point to acquire coordinate information, namely physical position of a current base station. By studying road test big data and fully considering discreteness and relevance of data points, a method for performing polar coordinate conversion and whitening on the original data is provided, and a k-means clustering algorithm is utilized to realize physical position locating of the base station finally. Acquisition of physical position coordinates of the base station is of important reference significance in intensity distribution and coverage distribution of signals of the base station.

The invention belongs to the technical field of urban traffic and particularly relates to a method for realizing data superposition display based on matrix coordinate conversion. The method comprisessteps that the real-time monitoring information is obtained through radar monitors and monitoring cameras; at least four radar target reference points and video frame reference points corresponding tothe radar target reference points in one-to-one correspondence are set, and a conversion matrix is calculated; coordinate transformation of radar monitoring targets is performed to obtain conversioncoordinates; a vehicle speed label and the vehicle frame information are drawn on a real-time video frame. The method is advantaged in that combination of radar equipment and camera monitoring equipment is realized by matrix coordinate conversion, so problems that a real-time monitoring video does not have the computing function and cannot timely sense the real-time speed and position informationof vehicles can be solved, illegal behaviors of road vehicles can be more visually collected, enforcement difficulty of traffic police is simplified, and strong evidence is provided for verification of the illegal behaviors in the future.

The invention provides positioning method and system as well as a server, wherein the positioning method comprises the following steps of: receiving a positioning request message which comprises the actual geographic coordinates of a terminal; converting the actual geographic coordinates into virtual map coordinates, and sending a positioning response message which comprises the virtual map coordinates to the terminal so that the terminal displays the virtual map coordinates on a virtual map stored on the terminal. The embodiment of the invention overcomes the defect that the traditional mobile phone positioning game is not visualized, and enhances the visualization and the entertainment of the mobile phone positioning game by converting the actual geographic coordinates of a terminal user positioned by a positioning device to the virtual map coordinates and displaying the change of the actual position of the terminal user on the virtual map stored on the terminal according to the virtual map coordinates.

The invention provides a fast displaying and drawing method of weather elements on a three dimensional earth model, and the method comprises the following steps: when a virtual camera is adjusted to a specific position and pose relative to the three dimensional earth model, determining a geographic coordinate range of a first visible region of the three dimensional earth model observed from the position of the virtual camera; expanding the geographic coordinate range of the first visible region for preset amplitude to obtain a second geographic coordinate range; obtaining all weather data sets contained in the second geographic coordinate range; preprocessing weather data in the weather data sets, performing graphic image conversion on the processed weather data to obtain a weather graphic image in a three dimensional earth scene; then rendering and outputting the three dimensional weather scene image. The method has the advantages that by defining the visible region, only weather data related to the visible region are necessarily processed and output, the interactive display speed of the three dimensional weather model is effectively improved and the use experience of a user is enhanced.

The invention relates to the Internet information processing field, and more particularly, to a map information display system based on asynchronous loading. The system comprises a customer end and a service end wherein the customer end is communicated and connected with the service end. The customer end realizes the display of target map information based on asynchronous loading. When the customer enters a target map information display page through the customer end, the default map information is displayed firstly, and then through threads, the geographic coordinate information, text information and picture information stored in a service end target are read. And on the basis of the already displayed map page, according to the coordinate position of the target, the position of the target is drawn together with words and picture information corresponding to the target. The system of the invention solves the problems that for synchronous display, too much memory has to be occupied, that the page refreshing efficiency is low, and that pictures are not smooth and continuous. Therefore, when pictures have to be switched, it can be done in a smooth and continuous manner. And the user's use experience is increased.

The invention relates to a high-precision ground mobile type three-component magnetic survey device and a magnetic survey method thereof. The three-component magnetic survey device is composed of a GPS base station, a GPS mobile station, a fluxgate detecting system and a non-magnetic theodolite. The fluxgate detecting system is fixed at the upper part of a telescope of the non-magnetic theodolite;the optical axis of the on-magnetic theodolite is parallel to the X axis of a fluxgate sensor; and the GPS mobile station is connected with an MCU control module in the fluxgate detecting system. According to the invention, a high-precision geodetic coordinate system parameter is obtained by a differential GPS formed by the GPS base station and the GPS mobile station and a geodetic azimuthal angle delta alpha is calculated by combining the non-magnetic theodolite, so that orientation of the three-component magnetic sensor can be completed without the inertial navigation system. Moreover, themeasured data are three-component magnetic survey data in a geographic coordinate, no geographic coordinate transformation and data processing are needed, and the data obtained by measurement are applied to geological inversion interpretation directly, so that the magnetic survey work efficiency is improved effectively, the field measuring time is saved, and the field working cost is lowered substantially. In addition, the high-precision ground mobile type three-component magnetic survey device with low price is easy to implement and the precision is high.

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 invention relates to the field of Internet information processing, in particular to an enterprise geographic information display method based on asynchronous loading. When a user enters a target enterprise map information display page, default map information is displayed, and then geographic coordinate information, text information and picture information of a target enterprise are read through a thread; the position of the enterprise and text and picture description corresponding to the enterprise are drawn on a displayed basic map page according to coordinates of the target enterprise. The problems that during synchronous display, the memory occupancy rate is too high, page refreshing efficiency is low and images slack are solved. Smoothness of image switching is guaranteed, and user experience is improved. The enterprise serves as an analysis object, display of the geographic information of the enterprise is achieved on a client, and technical support is provided for geographic region analysis of related enterprises, business analysis of related regions and the like.

A system for translating geographic coordinates into an easy to memorize word combination. The present invention may include a program implemented on a computer. The program directs the computer to translate inputted geographic coordinates into a word combination as well as translating the word combination back into the geographic coordinates. A user may use a mobile computing device to determine the coordinates of a location, the program may translate the coordinates to the word combination, and then the user may memorize the word combination displayed by the mobile computing device for later use.

The invention provides a twelve-phase permanent magnetic synchronous motor fault tolerance control method based on output maximum torque. The amplitude of each phase of current is severely unbalancedunder the fault tolerance control method where the copper loss of a stator is smallest, so output of the maximum torque is not ensured when the copper loss of the stator is smallest. The method comprises steps of (1) regarding n phases of motors into a whole, and dividing variables in the motor into two parts, wherein one part is arranged in the alpha-beta plane to participate in the electromechanical energy conversion and another part is in other planes to be irrelevant to the electromechanical energy conversion so as to establish a model of a twelve-phase permanent magnetic synchronous motor; (2) according to the rule that the total magnetic potential is unchanged, keeping the system decoupling conversion array to be unchanged so as to obtain an expression of rest each phase of the current under the maximum torque output mode during phase deficient operation of the twelve-phase motor; and (3) carrying out static coordinate conversion on the expression of each phase of the current, and calculating the volume of to-be-injected current of the corresponding harmonic wave sub-plane.

An image processing method includes a step of extracting an inner circle and an outer circle from an annular image, a step of obtaining the center for the extracted inner circle and the extracted outer circle respectively, and a step of moving a processing center serving as a reference in the polar coordinate conversion gradually between the center of the inner circle and the center of the outer circle to convert the circular image into a panoramic development image. According thereto, when an annular image of a side wall surface of a hole imaged by an omnidirectional imaging device (10) is converted into a panoramic development image according to a polar coordinate conversion, a distortion resulted from a position deviation occurred between an optical axis (L1) of the omnidirectional imaging device (10) and a central axis (L2) of the hole (H) can be corrected.

The invention relates to a recorder management platform-based acceleration coordinate conversion method and apparatus, and belongs to the field of electronic map vehicle position information processing. In order to overcome the shortcoming that the operation performance of a platform is seriously influenced when a quantity of received coordinate data is relatively large because the existing recorder management platform does not have a deviation value caching function, the recorder management platform-based acceleration coordinate conversion method and apparatus is proposed. The method comprises the steps of converting to-be-processed geographic coordinates into two-dimensional rectangular coordinates; according to given precision, performing grid division on a coordinate system; solving southwest point coordinates of a grid where the coordinates are located; and combining horizontal coordinates and longitudinal coordinates of the southwest point coordinates to form a character string, which serves as a KEY value, wherein the KEY value is used for representing the coordinates of the grid where the to-be-processed geographic coordinates are located. The method and the apparatus are suitable for electronic map positioning of the recorder management platform.

A system and method for mapping an aircraft position on segments that lie between waypoints on a non-linear map by converting real world geographic coordinates of an aircraft to image X, Y coordinates using an image X, Y length or scale of a respective segment as a basis for the conversion. The aircraft position may be mapped in real time and presented to a user via an aircraft device.

A system for locating optical network elements and determining span loss in a network is described. The geographical locations of the first and second network elements in the network are determined with respect to an earth-based coordinate system. A network management system program displays iconic representations of the first and second network elements relative to one another with respect to the coordinate system. The distance between the first and second network elements over a network span linking the two network elements is determined. The transmission loss of the span is determined by multiplying the calculated distance by a transmission loss factor associated with the transmission medium coupling the first and second network elements. The component losses associated with each of the first and second network elements is determined using known specifications or direct measurement. The span loss is determined by adding the component losses with the transmission loss of the medium.