Contents
How to calculate the least-cost path from a source?
Determining the least-cost path between a source and a destination is a two step process: Calculate the cost distance and backlink rasters from a source using the Cost Distancetool. Determine the least-cost path from a source to a destination using the Cost Pathtool. This lesson is divided into three sections:
How does the cost path tool work in Excel?
The Cost Path tool determines the least-cost path from a destination point to a source. Aside from requiring that the destination be specified, the Cost Path tool uses two rasters derived from a cost distance tool: the least-cost distance raster and the back-link raster. These rasters are created from the Cost Distance or Path Distance tools.
How does ArcGIS create the least costly path?
These rasters are created from the Cost Distance or Path Distance tools. The backlink raster is used to retrace the least costly route from the destination to the source over the cost distance surface.
What is the objective of cost distance analysis?
Available with Spatial Analyst license. From the cell perspective, the objective of the cost tools is to determine the least costly path to reach a source for each cell location in the Analysis window.
What’s the difference between cost distance and path distance?
The difference between the Cost Distance and Path Distance functions is how the cost of moving from one cell to the next is computed (see Cost Distance algorithm ). This section examines each of the input rasters and parameters as well as the formula used to calculate total accumulative cost for Path Distance.
How is path distance calculated in ArcGIS Desktop?
However, Path Distance not only calculates the accumulative cost over a cost surface, it does so while compensating for the actual surface distance that must be traveled and for the horizontal and vertical factors influencing the total cost of moving from one location to another.
How to calculate accumulative cost distance in ArcGIS?
To calculate accumulative cost distance from the source location, use the Cost Distancetool. This tool requires the ArcGIS Spatial Analyst extensionextension, so first make sure the extension is turned on by clicking the Customizetab in the ArcMaptaskbar.
How do you create a cost raster for a road?
To create this raster, you need to identify the cost of constructing a road through each cell. Although the cost raster is a single dataset, it is often used to represent several criteria. In this example, land use and slope influence the construction costs.
How are slope and land use rasters reclassified?
The slope and land-use rasters have been reclassified on a scale of 1 to 10. The attributes of each dataset should be examined to determine their contribution to the cost of building a road. For example, it is more costly to traverse steep slopes, so steeper slopes will be assigned higher costs when reclassifying this dataset.