B.2.2.1 Grid line registration

In this registration, the nodes are centered on the grid line intersections and the data points represent the average value in a cell of dimensions ( $x_{inc} \cdot y_{inc}$) centered on the nodes (Figure B.1). In the case of grid line registration the number of nodes are related to region and grid spacing by

$$\begin{array}{ccl} nx & = & (x_{max} - x_{min}) / x_{inc} + 1 \\ ny & = & (y_{max} - y_{min}) / y_{inc} + 1 \end{array}$$

which for the example in Figure B.1 yields $nx = ny = 4$.

Figure B.1: Grid line registration of data nodes.