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Captioneditem
anchorcatchm_rivers
captionExtent and corresponding population (values within the boxes) for two catchment areas (dark blue (6165) and green (6031) lines) when the facility is placed on a different side of a river (light blue)


In view of the above, working at the highest resolution possible would seem to be the best option. Nonetheless, it is important to remember that increasing the resolution of the raster layers results in an increase of the size of the files and the required computational time (see section 3.2.5).

Accuracy is also a function of scale (i.e. the ratio of a distance on the map to the corresponding distance on the ground), which is itself directly linked to the resolution of the raster format data used in the analysis (Ebener, 2016). It is therefore important to ensure consistency from an accuracy perspective among the different layers being used in the analysis.