james-roden

#!Python3

def joides(water_depth, base_water_temp, geothermal_gradient):
    """Returns the base of the gas hydrate stability zone for a given water depth

    Joides formula for calculating the base gas hydrate stability meters below sea floor. As per the publication:
    Ocean Drilling Program Guidelines for Pollution Prevention and Safety; JOIDES Journal, Volume 18, Special Issue
    No. 7, October 1992.
    A range of 1-2501 is used, as per studies, generally the maximum is 2000 meters below surface.

james-roden

# Rotation matrix function
def rotate_matrix (x, y, angle, x_shift=0, y_shift=0, units="DEGREES"):
    """
    Rotates a point in the xy-plane counterclockwise through an angle about the origin
    https://en.wikipedia.org/wiki/Rotation_matrix
    :param x: x coordinate
    :param y: y coordinate
    :param x_shift: x-axis shift from origin (0, 0)
    :param y_shift: y-axis shift from origin (0, 0)
    :param angle: The rotation angle in degrees