Label | Explanation | Data Type |
Input source raster or features | The input source locations. This is an image service or feature service that identifies the cells or locations from which, or to which, the least accumulated cost distance for every output cell location is calculated. For an image service, the input type can be integer or floating point. | Raster Layer; Feature Layer |
Out distance accumulation raster name | The output distance accumulation raster name. The distance accumulation raster contains the accumulative distance for each cell from, or to, the least-cost source. | String |
Input barrier raster or features (Optional) | The dataset that defines the barriers. The barriers can be defined by an integer or a floating-point image service, or by a feature service. For an image service barrier, the barrier must have a valid value, including zero, and the areas that are not barriers must be NoData. | Raster Layer; Feature Layer |
Input surface raster (Optional) | An image service defining the elevation values at each cell location. The values are used to calculate the actual surface distance covered when passing between cells. | Image Service; Raster Layer |
Input cost raster (Optional) | An image service defining the impedance or cost to move planimetrically through each cell. The value at each cell location represents the cost-per-unit distance for moving through the cell. Each cell location value is multiplied by the cell resolution while also compensating for diagonal movement to obtain the total cost of passing through the cell. The values of the cost raster can be integer or floating point, but they cannot be negative or zero (you cannot have a negative or zero cost). | Image Service; Raster Layer |
Input vertical raster (Optional) | An image service defining the z-values for each cell location. The values are used for calculating the slope used to identify the vertical factor incurred when moving from one cell to another. | Image Service; Raster Layer |
Vertical factor (Optional) | Specifies the relationship between the vertical cost factor and the vertical relative moving angle (VRMA). There are several factors with modifiers from which to select that identify a defined vertical factor graph. The graphs are used to identify the vertical factor used in calculating the total cost for moving into a neighboring cell. In the descriptions below, vertical factor (VF) defines the vertical difficulty encountered in moving from one cell to the next, and vertical relative moving angle (VRMA) identifies the slope angle between the FROM or processing cell and the TO cell. The Vertical factor options are as follows:
Modifiers to the vertical keywords are as follows:
| Vertical Factor |
Input horizontal raster (Optional) | An image service defining the horizontal direction at each cell. The values on the raster must be integers ranging from 0 to 360, with 0 degrees being north, or toward the top of the screen, and increasing clockwise. Flat areas should be given a value of -1. The values at each location will be used in conjunction with the Horizontal factor parameter to determine the horizontal cost incurred when moving from a cell to its neighbors. | Image Service; Raster Layer |
Horizontal factor (Optional) | Specifies the relationship between the horizontal cost factor and the horizontal relative moving angle (HRMA). There are several factors with modifiers from which to select that identify a defined horizontal factor graph. The graphs are used to identify the horizontal factor used in calculating the total cost for moving into a neighboring cell. In the descriptions below, horizontal factor (HF) defines the horizontal difficulty encountered when moving from one cell to the next, and horizontal relative moving angle (HRMA) identifies the angle between the horizontal direction from a cell and the moving direction. The Horizontal factor options are as follows:
Modifiers to the horizontal factors are as follows:
| Horizontal Factor |
Out back direction raster name (Optional) | The output back direction raster name. The back direction raster contains calculated directions in degrees. The direction identifies the next cell along the optimal path back to the least accumulative cost source while avoiding barriers. The range of values is from 0 degrees to 360 degrees. The value 0 is reserved for the source cells. Due east (right) is 90 degrees, and the values increase clockwise (180 is south, 270 is west, and 360 is north). The output raster is of type float. | String |
Out source direction raster name (Optional) | The output source direction raster name. The source direction raster identifies the direction of the least accumulated cost source cell as an azimuth in degrees. The range of values is from 0 degrees to 360 degrees. The value 0 is reserved for the source cells. Due east (right) is 90 degrees, and the values increase clockwise (180 is south, 270 is west, and 360 is north). The output raster is of type float. | String |
Out source location raster name (Optional) | The source location raster is a multiband output. The first band contains a row index, and the second band contains a column index. These indexes identify the location of the source cell that is the least accumulated cost distance away. | String |
Initial accumulation (Optional) | The initial accumulative cost to begin the cost calculation. Allows for the specification of the fixed cost associated with a source. Instead of starting at a cost of zero, the cost algorithm will begin with the value set by Initial accumulation. The values must be zero or greater. The default is 0. | Double; Field |
Maximum accumulation (Optional) | The maximum accumulation for the traveler for a source. The cost calculations continue for each source until the specified accumulation is reached. The values must be greater than zero. The default accumulation is to the edge of the output raster. | Double; Field |
Multiplier to apply to costs (Optional) | The multiplier to apply to the cost values. This allows for control of the mode of travel or the magnitude at a source. The greater the multiplier, the greater the cost to move through each cell. The values must be greater than zero. The default is 1. | Double; Field |
Travel direction (Optional) | Specifies the direction of the traveler when applying horizontal and vertical factors.
| String; Field |
Distance Method (Optional) | Specifies whether to calculate the distance using a planar (flat earth) or a geodesic (ellipsoid) method.
| String |
Derived Output
Label | Explanation | Data Type |
Output distance accumulation raster | The output distance accumulation raster. | Raster |
Output back direction raster | The output back direction raster. | Raster |
Output source direction raster | The output source direction raster. | Raster |
Output source location raster | The output source location raster. | Raster |