You only need vertical & horizontal coordinates in the same units when the calculation actually requires that both are in the same units. For example, calculations of slope (rise/run or vertical/horizontal) or aspect which is derived from slope.

Other examples of when you might need to reproject are when you need projected (cartesian), not geographic (lon, lat) horizontal units for the calculation, such as density (values per unit area) or cost/path/euclidean distance. Obviously here the raster values are not vertical or elevation values and so don't (and can't) be in in the same units

If you're just draping a polygon or raster region over raster values to get some summary stats, you don't need to reproject. Indeed by reprojecting, you are introducing an additional source of error.

You only need vertical & horizontal coordinates in the same units when the calculation actually requires that both are in the same units. For example, calculations of slope (rise/run or vertical/horizontal) or aspect which is derived from slope.

Other examples of when you might need to reproject are when you need projected (X, Y cartesian), not geographic (lon, lat degrees) horizontal units for the calculation, such as density (values per unit area) or cost/path/euclidean distance. Obviously here the raster values are not vertical or elevation values and so don't (and can't) be in in the same units

If you're just draping a polygon or raster region over raster values to get some summary stats, you don't need to reproject. Indeed by reprojecting, you are introducing an additional source of error.

You only need vertical & horizontal coordinates in the same units when the calculation actually requires that both are in in the same units. For example, calculations of slope (rise/run or vertical/horizontal) or aspect which is derived from slope.

Other examples of when you might need to reproject are when you need projected (cartesian), not geographic (lon, lat) horizontal units for the calculation, such as density (values per unit area) or cost/path/euclidean distance. Obviously here the raster values are not vertical or elevation values and so don't (and can't) be in in the same units

If you're just draping a polygon or raster region over raster values to get some summary stats, you don't need to reproject. Indeed by reprojecting, you are introducing an additional source of error.

You only need vertical & horizontal coordinates in the same units when the calculation actually requires that both are in the same units. For example, calculations of slope (rise/run or vertical/horizontal) or aspect which is derived from slope.

Other examples of when you might need to reproject are when you need projected (cartesian), not geographic (lon, lat) horizontal units for the calculation, such as density (values per unit area) or cost/path/euclidean distance. Obviously here the raster values are not vertical or elevation values and so don't (and can't) be in in the same units

If you're just draping a polygon or raster region over raster values to get some summary stats, you don't need to reproject. Indeed by reprojecting, you are introducing an additional source of error.