Building metrics are calculated based on the pixel in which their respective centroids are located (Building Centroid Based – BCB method), or the pixel(s) that their geometries intersect (Pixel Intersected Based – PIB method). For buildings that straddle multiple grid cells, the grid cell in which the buildings' centroids are located will be allocated the area value. Note: For the BCB method, total building area may exceed the area of a grid cells if the centroid of a large building falls within the grid cell.