10 results about "Geographical latitude" patented technology

The invention discloses a broadcast ionosphere model adaptive selection method for a GNSS (Global Navigation Satellite System) terminal, which comprises the following steps: receiving navigation message information broadcasted by each GNSS system in real time, and obtaining various broadcast ionosphere model parameters; calculating the geographic latitude corresponding to the ionospheric puncture point according to the current position coordinate of the user, the satellite elevation angle and the azimuth angle; according to the geographic latitude and the time period of the current calculation time, selecting an optimal broadcast ionosphere model under the current space-time condition; and according to the optimal broadcast ionosphere model and the broadcast ionosphere model parameters, calculating to obtain a correction value of the ionosphere delay amount. According to the invention, by selecting the optimal broadcast ionosphere model in the current environment, the positioning precision is improved, the error of a certain model is prevented from being amplified, the advantages of each broadcast ionosphere model are exerted, and the stability and consistency of system positioning are improved; dynamic environment change is supported, and good space-time adaptive capacity is achieved; and model selection is realized only at a user side without modifying the broadcasting format of the existing satellite message.

The application provides a post-earthquake building damage state judgment and latitude and longitude inversion method based on oblique images, comprising: obtaining post-earthquake oblique photography images, obtaining a normalized digital surface model (nDSM) based on the oblique photography images; performing multi-threshold segmentation on the normalized digital surface model (nDSM) to preliminarily identify damaged buildings and obtain a damage rate of regional buildings; extracting building multi-side images from the oblique photography images, identifying earthquake damage information, and extracting refined earthquake damage features including cracks and wall peeling; comprehensively judging the damage grade of a target building according to the damage rate of regional buildings and the refined earthquake damage features; and based on the earthquake damage information identified by the earthquake damage information, the geographical latitude and longitude coordinates corresponding to the earthquake damage information are calculated through color spot positioning and coordinate conversion. The application realizes full-process automation from data collection to position output, has high practical value and emergency response capability.

The invention relates to a method for indicating a geographic location to a user. The technical result consists in simplifying the process of providing mapping information. The proposed computer-implemented method comprises: recognizing, within textual content, an address expression beginning with at least one special character; generating a geo-link based on the recognized address expression; highlighting the recognized address expression during display of the textual content; launching a mapping information display application through the geo-link in response to selection of the highlighted address expression; obtaining the address expression through the geo-link; transmitting the address expression to a geocoding service; receiving geographic latitude and longitude coordinates corresponding to the address expression from the geocoding service; and displaying on a map a geographic location corresponding to the received coordinates.

A solar apparent motion demonstration instrument relates to a teaching demonstration appliance. The instrument can visually demonstrate the sun apparent motion trail and the sunrise and sunset moments on the earth at any latitude and any day. The instrument is composed of a support, a celestial sphere shell, a horizon circle hemisphere shell and a horizon observation time measuring ring. The horizon ring hemisphere shell is arranged in the celestial sphere shell, and the celestial sphere shell and the observation horizon time measuring ring are arranged on the bracket; the celestial sphere shell is a transparent hollow sphere; the horizon ring hemisphere shell is a transparent hollow hemisphere, and the large circular surface of the horizon ring hemisphere shell represents the horizon ring; a small amount of water is injected into the celestial sphere shell, and the horizon ring hemisphere shell is placed into the celestial sphere shell, so that the horizon ring hemisphere shell floats; the celestial sphere shell is connected with the upper end point and the lower end point of the support round frame through rotating shafts. And the observation ground time measuring rings are fixed on two sides of the support circular frame. The vertical rotation instrument can change the geographic latitude of an observer, and the transverse rotation instrument can simulate the weekly-day apparent motion of the sun.

The application belongs to the technical field of computer information processing, and specifically discloses a high-latitude sailing chart projection selection and switching method. The application solves the problems of projection selection, coordinate system adaptation and switching link fragmentation in high-latitude sailing through a coherent technical path based on latitude selection projection, automatic coordinate system matching, switching judgment according to sailing state and smooth conversion execution. The application realizes the standardized selection of projection based on geographical latitude as an objective basis, overcoming the blindness of experience selection. Through automatic matching of projection and coordinate system, the problem of disconnection with the navigation system and the need for manual intervention is solved. By introducing a switching area and dynamically judging the timing according to real-time sailing information, the rigid boundary switching is transformed into a smooth transition linked with the sailing state. Finally, multiple isolated operations are integrated into a complete process driven by data and automatically connected, significantly improving the automation level, system adaptability and navigation reliability of high-latitude sailing.

The invention relates to the technical field of weight measurement. The method comprises the following steps: extracting a gravity vector component in a vertical direction according to acceleration vector information, calculating to obtain a gravity acceleration measured value of a current measurement position based on the gravity vector component, calculating a geomagnetic declination angle according to magnetic field vector information, and measuring the gravity acceleration measured value of the current measurement position according to the geomagnetic declination angle. A preset geomagnetic-latitude mapping rule is matched based on the geomagnetic declination, geographic latitude parameters corresponding to the current measurement position are derived, the geographic latitude parameters are input into a standard gravitational acceleration calculation model, and a standard gravitational acceleration value corresponding to the current measurement position is generated; and constructing a gravity compensation factor according to a difference value between the standard gravitational acceleration value and the measured gravitational acceleration value, and converting an original voltage value output by the weighing sensor based on the gravity compensation factor to obtain a corrected mass value of the target object. The body weight measuring device has the effect of improving the measurement adaptability of body weight measurement.

The application discloses a kind of artificial terrain area gravity anomaly determination method, system, equipment and medium, it is related to geological exploration field.The method comprises the following steps: determining the center position coordinates of ground control point signboard;Determine the image data in artificial terrain area;According to the center position coordinates, correct image data, obtain topographic data;Determine the plane coordinates, geographic latitude and elevation of all observation points in artificial terrain area;Determine the observed gravity value of all observation points in artificial terrain area;According to the plane coordinates, geographic latitude, elevation, observed gravity value and topographic data of all observation points in artificial terrain area, calculate the gravity anomaly value of all observation points in artificial terrain area;The gravity anomaly value of all observation points in artificial terrain area is gridded, to determine the gravity anomaly variation characteristics of artificial terrain area, complete the missing data of gravity anomaly of artificial terrain area.The application can solve the problem of missing gravity anomaly data in artificial terrain area.

The invention relates to a method for indicating a geographical location to a user. The technical effect is in simplifying the process of providing map information. The proposed computer-implemented method for indicating a geographical location to a user comprises: identifying an address expression in a text content starting with at least one special character; generating a geographical link based on the identified address expression; highlighting the identified address expression during displaying the text content; and upon tapping the highlighted identified address expression, initiating a map information display unit according to the geographical link. By means of a map information display unit in a user computing device, the method further comprises: obtaining the address expression according to the geographical link; transmitting the address expression to a geocoding unit; obtaining geographical latitude and longitude coordinates corresponding to the address expression from the geocoding unit; and displaying the geographical location on a map according to the obtained coordinates.

The invention provides a near-ground received radiation quantity calculation method, and belongs to the technical field of solar energy resource evaluation, and the method comprises the steps: S1, obtaining the historical data of astronomical parameters of a to-be-calculated region, the astronomical parameters comprise a radiation period, a solar constant, geographic latitude, a sun-earth distance, solar declination, sunrise and sunset hour angles, total ground radiation quantity, sunshine duration, half-day sunshine duration and astronomy difference; s2, dividing the historical data of the astronomical parameters into twenty-four groups according to solar terms; s3, based on grouping, 24 ground total radiation quantity calculation equations are constructed respectively; the historical data of the astronomical parameters are divided into twenty-four groups according to the solar term days over the years, the time range is refined through the ground total radiation quantity calculation formula of each group, the linear regression relation between the ground total radiation quantity and the sunshine percentage is accurately fitted, and the deviation between the measured data of the meteorological station and the formula calculation result is remarkably reduced.

The invention provides a post-earthquake inclined image building damage state determination and latitude and longitude inversion method, which comprises the steps of obtaining an inclined photography image of a post-earthquake area, and obtaining a normalized digital surface model nDSM based on the inclined photography image; carrying out multi-threshold segmentation on the normalized digital surface model nDSM, preliminarily identifying a damaged building, and obtaining the damage rate of the regional building; multi-side images of the building are extracted from the oblique photography images, earthquake damage information is identified, and refined earthquake damage characteristics including cracks and wall skin falling are extracted; comprehensively judging the damage grade of the target building according to the damage rate of the regional building and the refined earthquake damage characteristics; and based on the earthquake damage information identified by the earthquake damage information, through color spot positioning and coordinate conversion, carrying out inversion calculation to obtain geographic latitude and longitude coordinates corresponding to the earthquake damage information. According to the invention, full-process automation from data acquisition to position output is realized, and the method has high practical value and emergency response capability.