Computer Program for Converting Rectangular Coordinates to Latitude-Longitude Coordinates

摘要

A Fortran-77 computer program was developed for converting the coordinates of any rectangular grid on a map to coordinates on a grid that is parallel to lines of equal latitude and longitude. Using the program in conjunction with ground-water flow models, the user can extract data and results from models with varying grid orientations and place these data into a grid structure that is oriented parallel to lines of equal latitude and longitude. All cells in the rectangular grid must have equal dimensions, and all cells in the latitude-longitude grid must measure 1 minute by 1 minute. The program is applicable if the map used shows lines of equal latitude as arcs and lines of equal longitude as straight lines and assumes that the Earth's surface can be approximated as a sphere.