Скачать или смотреть Euclidean Direction Tool ArcGIS

Euclidean Direction Tool, Distance Toolset, Spatial Analyst ArcToolbox
Summary
Calculates, for each cell, the direction, in degrees, to the nearest source.

Usage
The input source data can be a feature class or raster.

The output values are based on compass directions (90 to the east, 180 to the south, 270 to the west, and 360 to the north), with 0 reserved for the source cells.

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. Cells that have NoData values are not included in the source set. The value 0 is considered a legitimate source. A source raster can be created using the extraction tools.

When the input source data is a feature class, the source locations are converted to a raster internally before performing the analysis.

When using feature data for the input source data, care must be taken with how the output cell size is handled when it is coarse, relative to the detail present in the input. The internal rasterization process uses the same default Cell assignment type as the Feature to Raster tool, which is the cell center method. This means that data not located at the center of the cell will not be included in the intermediate rasterized source output, so it will not be represented in the distance calculations. For example, if your sources are a series of small polygons (such as building footprints) that are small relative to the output cell size, it is possible that only a few will fall under the centers of the output raster cells, seemingly causing most of the others to be lost in the analysis.

To avoid this situation, as an intermediate step, you could rasterize the input features directly with the Feature to Raster tool and set the Field parameter. Then use the resulting output as input to the particular distance tool you want to use. Alternatively, you could select a small cell size to capture the appropriate amount of detail from the input features.

The Maximum distance is specified in the same map units as the input source data.
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