I am trying to do a very simple interpolation with soil nitrate data. I wanted to do IDW because points close to each other should be most similar. I used the IDW interpolation function in ArcMap (image 1), and got some strange results.
The layer is stretched/elongated on the vertical axis (image 2). In fact, when I try kriging and other methods from different packages, its still elongated. I'm still new to this and thought I understood the input variables.
Is there a variable or parameter that I am missing which over emphasizes the vertical relationship?
Info on data source: Geographic Coordinate System: GCS_WGS_1984, Datum: D_WGS_1984, Prime, Meridian: Greenwich, Angular Unit: Degree
Info on tiff layer: Spatial Reference: Polar_Stereographic, Datum: D_WGS_1984
Edit: When the data are projected using polar stereographic, they no longer correlate to the map and do not represent the original sampling scheme (images 3 and 4)