![]() For example, it is more costly to traverse steep slopes, so steeper slopes will be assigned higher costs when reclassifying this dataset. The attributes of each dataset should be examined to determine their contribution to the cost of building a road. The slope and land-use rasters have been reclassified on a scale of 1 to 10. Reclassifying your datasets to a common scale In this example there are three general steps to create a cost raster. Each of these datasets is in a different measurement system (land-use type and percent slope), so they cannot be directly compared to one another and must be reclassified to a common scale. ![]() In this example, land use and slope influence the construction costs. Although the cost raster is a single dataset, it is often used to represent several criteria. To create this raster, you need to identify the cost of constructing a road through each cell. Source area to determine least cost distance from The cost rasterĪ cost raster identifies the cost of traveling through each cell. In the graphic below, you can see the area identified as the starting location (in red) for the proposed road. The source is the starting point of your proposed feature for analysis. The example will demonstrate creating a cost raster. To create the path, first a cost distance surface must be created, which requires a source location dataset and a cost raster as inputs. In the following example, a least-cost path on which to construct a new road is needed. These datasets can be created in different ways with the tools available in the ArcGIS Spatial Analyst extension. A source and a cost dataset must first be created. Cost distance tools calculate for each cell the least accumulative cost to specified source locations over a cost surface.
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