In detail: I build a Atlas of maps with alternating sizes, like 145x129 or 165x129. statistics, including minimum values of zero, and then eventually the cell size, listed as 3,-3 (see image, right): ... 2.6 versions of QGIS. For example, a cell output value can be the average of all 121 cells–an 11x11 kernel–centered on the cell whose value is being estimated (this is an example of a smoothing function ). -- Dmitry Shachnev

focal statistics qgis 2021