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According to ellipsoidal geodetic coordinate seeki
4.0
Application background In the measurement of the physical force, the gravity anomaly is calculated, and the gravity of the calculated points and the normal gravity of the measuring points are needed. When normal gravity is calculated, it is required to calculate the geodetic coordinates, i.e., longitude, latitude and height. If GPS is used to collect data, the reference ellipsoid of the geodetic coordinates is WGS84. Key Technology This program uses the WGS84 reference ellipsoid parameters, input data to the WGS84 geodetic coordinates, in order, latitude, longitude, ellipsoidal height. Input file, Input.dat. Output file, output.txt. Evaluates, ellipsoidal height h above the normal gravity. If the height is set to 0, then the results for this point on the reference ellipsoid of normal gravity.
wangjianbo2015 0 0
1
Geodetic coordinate transformation to spherical co
no vote
Application background In physical measurement, the geodetic coordinate system is converted to spherical coordinate system. The geodetic coordinate system is based on the coordinates of an ellipsoid, first converted into the center of the earth's Descartes coordinate system, and then converted to the spherical coordinate system by the center of the earth's Descartes Cartesian coordinate system. Key Technology Input file Input.dat format B L H, conversion of parameter ellipsoid ellipsoid long radius a=6378137m and flattening of the countdown for 298.257223563. The center was first converted to Cartesian rectangular coordinate system, and then further transformed into spherical coordinates, the output file is convert.dat
wangjianbo2015 0 0
1
Reduce SRTM3 data point density
no vote
Application background Downloaded from the website SRTM3 data point density is too large and bring inconvenience to use and program objective is reduced density, reduces the resolution. By removing the points adjacent to, its resolution decreased, but still maintained the format of the original dot matrix, for example, the original is the n * n, the n rows and n columns, reducing the density as half of the original. N/2*n/2, that is, n/2 line, n/2 column. If n is an even number, then n/2=int (n/2) +1 Key Technology Program is divided into two separate_jshu.f and separate_oushu.f. The input file was input Input_jshu.dat and Input.dat. that when the original file n * n n is odd, using a program, generate a new file jishu.dat. new generation ranks to n/2=int (n / 2) + 1. When the original n x n n is even, the use of a file, the new generation file for the new generation of n/2. oushu.dat
wangjianbo2015 0 0
1
Converting column data into a row format
no vote
Application background SRTM3 data or other file formats, such as text files are downloaded from the Internet, such as text files, which are used in order to be converted into a format that will be used for the purpose of a column. Key Technology Input file for Input.dat. procedures for covert Covert_matrix.f. When in use, input file data number must be integer n x n, and modify file parameters nn=57, changed to input file in the specific value of N, the newly generated file for a new New_matrix.dat, for an n x n file format.
wangjianbo2015 0 0
1
A large local angle of two points for two points
no vote
Application background In the measurement of physical, the azimuth of two points is often used, and the spherical coordinates of two points are known. Calculation of the earth as a sphere. Key Technology Through two points of the earth's latitude and longitude coordinates, the calculation of the two points spherical coordinate azimuth. Need to input file INPUT, input format latitude longitude geodetic height (Huo Zhenggao), can be a set of data can also be a continuous number of data, the order of the column is listed in the three column data. The azimuth angle is calculated from the first point to the second point. For example, if the serial number is 1,2,3,4....... Then the azimuth angle is 1-2, 2-3, 3-4....... Output file is fangweijiao.dat
wangjianbo2015 0 0
1
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