Fig. 4
From: Take five: about the beat and the bar of annual and 5-year periodic national forest inventories
Spatial design of the Norwegian annual forest inventory survey as implemented since 1994. The spatial design is based on a square grid, tessellated in blocks of 5 × 5 cells. Each block is formed by a Latin square (4a) for the assignation of each grid cell to a yearly panel, with similarity to the Polish forest inventory survey. The same Latin square is repeated indefinitely over the territory (4b) and allows interpenetration of the yearly panels, in a way that generates a regular coverage of the territory each year (example with panel 5 in gray), borrowing to unaligned systematic sampling (note: an incidental exception is formed by panel 1 which distribution is spatially systematic (knight’s move pattern), in a way thus similar with the French and Polish inventories). (Redrawn and extended from Breidenbach et al. 2020)