Polyline to Raster (Conversion)
Summary
Converts polyline features to a raster dataset.
Usage
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Any feature class (geodatabase, shapefile or coverage) containing polyline features can be converted to a raster dataset.
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The input field type determines the type of output raster. If the field is integer, the output raster will be integer; if it is floating point, the output will be floating point.
If the input field contains string values, the output raster will contain an integer value field and a string field.
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This tool is a complement to the Raster to Polyline tool, which convert a raster to a polyline feature class.
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This tool provides greater control over the assignment of cell values when more than one feature is present in an output cell than the Feature to Raster tool.
Syntax
Parameter | Explanation | Data Type |
in_features |
The polyline input feature dataset to be converted to a raster. | Feature Layer |
value_field |
The field used to assign values to the output raster. It can be any field of the input feature dataset's attribute table. | Field |
out_rasterdataset | The output raster dataset to be created. When not saving to a geodatabase, specify .tif for a TIFF file format, .img for an ERDAS IMAGINE file format, or no extension for an Esri Grid raster format. | Raster Dataset |
cell_assignment (Optional) |
The method to determine how the cell will be assigned a value when more than one feature falls within a cell.
| String |
priority_field (Optional) |
This field is used when a feature should take preference over another feature with the same attribute. | Field |
cellsize (Optional) |
The cell size for the output raster dataset. The default cell size is the shortest of the width or height of the extent of the input feature dataset, in the output spatial reference, divided by 250. | Analysis Cell Size |
Code Sample
Converts polyline features to a raster dataset.
import arcpy
from arcpy import env
env.workspace = "c:/data"
arcpy.PolylineToRaster_conversion("roads.shp", "CLASS", "c:/output/roads.img",
"MAXIMUM_COMBINED_LENGTH", "LENGTH", 30)
Converts polyline features to a raster dataset.
# Name: PolylineToRaster_Ex_02.py
# Description: Converts polyline features to a raster dataset.
# Import system modules
import arcpy
from arcpy import env
# Set environment settings
env.workspace = "C:/data"
# Set local variables
inFeatures = "roads.shp"
valField = "CLASS"
outRaster = "c:/output/roads.tif"
assignmentType = "MAXIMUM_COMBINED_LENGTH"
priorityField = "LENGTH"
cellSize = 30
# Execute PolylineToRaster
arcpy.PolylineToRaster_conversion(inFeatures, valField, outRaster,
assignmentType, priorityField, cellSize)