- harmonica.derivative_northing(grid, order=1, method='finite-diff')¶
Calculate the derivative of a regular grid in the northing direction
Compute the spatial derivative in the northing direction of regular gridded data. It can compute using accurate central differences using
xarray.differentiateor through frequency domain calculations through Fast Fourier Transform.
Choosing the finite differences option produces more accurate results without border effects.
xarray.DataArray) – A two dimensional
xarray.DataArraywhose coordinates are evenly spaced (regular grid). Its dimensions should be in the following order: northing, easting. Its coordinates should be defined in the same units.
order (int) – The order of the derivative. Default to 1.
method (str (optional)) – Method that will be used for computing the easting derivative. It can be either
"finite-diff", for computing using
"fft", for using FFT-based filters. Default
xarray.DataArray) – A
xarray.DataArraywith the northing derivatives of the passed
grid. Its units are the same units of the
gridper units of its coordinates to the power of the passed