I am trying to do some analysis with Level 3 Standard Mapped MODIS NetCDF files, obtained from the Ocean Color Web level 3 data browser (https://oceancolor.gsfc.nasa.gov/cgi/l3), and I want to project them into a projected coordinate system and do some analysis. When making a NetCDF raster layer in ArcMap (using, predictably, the Make NetCDF Raster Layer tool) the Spatial Reference shows up as GCS_WGS_1984.
The documentation seems to agree, and says that the projection should be Plate Carree (which fits into the equidistant cylindrical category, as I understand). (from https://oceancolor.gsfc.nasa.gov/docs/format/#3M)
If the file is in a Plate Carree projection, then why is it not showing up in ArcMap as such? Furthermore, attempting to define the projection as Plate Carree (with, predictably, the Define Projection tool) yields a warning that there is already a projection associated with the layer, and whenever I try to reproject it I get a warning about inconsistent extent (it looks like this)
I have tried my best to understand what is going on but I do not feel confident in what I am doing. Can someone explain my confusion here- why is the raster not showing up with the projection I would expect it to?
I am using ArcGIS 10.3.1