I have a broad question on how to calculate the 'correct' cell size for a raster when analyzing an area not at the equator. My goal is to project a land cover raster provided in GCS WGS84 to an equal area projection and 'accurately' calculate the area in hectares.
The land cover layer metadata (accompanying text file) states that it has a 300 m resolution, by which I assume they mean 300 m equivalent at the equator. Manually measuring the cell size near the equator seems to indicate that this could be true. However, my area of interest is centered on 15 North Lat., 96 East Long. and therefore each projected cell will cover a slightly different area.
The issue arises when I choose the cell size while projecting to equal area. Two older posts suggest projecting and/or using a raster calculator equation that incorporates the latitude in order to calculate the correct area. Does this make sense or is there a better and simpler way to achieve this goal: