Accuracy
Using raster GIS for network analysis leads into a simplification of a complex network structure. The path is prone to be distorted, firstly, due to the mistaken length introduced by Incremental Length, and secondly, due the zigzagged path, a consequence of the innate grid structure. Nonetheless, a fine-tuned use of Incremental Linkage and a minimal cell resolution can have a smoothing effect on the exact delineation of the path. On the other hand, minimising cell resolution increases computation.
In raster GIS the precision of the model is determined by the cell resolution, the finer the resolution (the smaller the cell size), the better the precision. For this research a cell resolution of 20m was deemed appropriate for the task in question,
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