Contents
How does the cost distance raster work in ArcGIS?
The output cost distance raster. The cost distance raster identifies, for each cell, the least accumulative cost distance over a cost surface to the identified source locations. A source can be a cell, a set of cells, or one or more feature locations. The output raster is of floating point type.
How is the maximum distance determined in ArcGIS?
The Maximum distance is specified in the same cost units as those on the cost raster. For the output distance raster, the least-cost distance (or minimum accumulative cost distance) of a cell to a set of source locations is the lower bound of the least-cost distances from the cell to all source locations.
What does proximity ( raster distance ) mean in QGIS?
Proximity (raster distance)¶. Description¶. The proximity algorithm generates a raster proximity map indicating the distance from the center of each pixel to the center of the nearest pixel identified as a target pixel. Target pixels are those in the source raster for which the raster pixel value is in the set of target pixel values.
How are units assigned to the cost raster?
The units assigned to the cost raster can be any type of cost desired: dollar cost, time, energy expended, or a unitless system that derives its meaning relative to the cost assigned to other cells. The values on the input cost raster can be integer or floating point, but they cannot be negative or 0 (you cannot have a negative or zero cost).
Which is the default extent for cost distance?
Any cell location that is assigned NoData on the input cost surface will receive NoData on all output rasters (cost distance, allocation, and back link). If the input source data and the cost raster are different extents, the default output extent is the intersection of the two.
What are the different types of cost distance tools?
Cost Connectivity gives the least-cost connectivity network between two or more input regions. All cost distance tools require both a source dataset and a cost raster as input. The different types of output from the cost distance tools are described in the following sections.
How is the maximum distance determined in ArcGIS Pro?
The Maximum distance is specified in the same cost units as those on the cost raster. For the output distance raster, the least-cost distance (or minimum accumulative cost distance) of a cell from or to a set of source locations is the lower bound of the least-cost distances from the cell to all source locations.
How is the least accumulative cost distance calculated?
Calculates the least accumulative cost distance for each cell from or to the least-cost source over a cost surface. The input source data can be a feature class or raster. When the input source data is a raster, the set of source cells consists of all cells in the source raster that have valid values.
Can a cost raster have a negative value?
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). Defines the threshold that the accumulative cost values cannot exceed. If an accumulative cost distance value exceeds this value, the output value for the cell location will be NoData.
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.