I have a raster image in GCS WGS 1984. For sampling I want to take a grid of 500 m^2 in my area of interest and pick the centroid of this square. How do I make sure that the grid created with Fishnet tool is 500 m^2 on the ground? I tried with the Cell width parameter but ended up with very large grids. I can't specify the number of rows and columns because the numbers can vary as I proceed with my project.
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