VectorFieldRenderer

摘要

使用矢量符号可视化栅格中的流向和量级信息。

说明

栅格对象所引用的栅格数据集是临时性的。 要将其设置为永久，可以调用栅格对象的 save 方法。

语法

VectorFieldRenderer (raster, {is_uv_components}, {reference_system}, {mass_flow_angle_representation}, {calculation_method}, {symbology_name})

参数	说明	数据类型
raster	The input raster.	Raster
is_uv_components	Specifies whether the input components represent U-V, or magnitude and direction. True—The input data represents U-V components. False—The input data represents magnitude and direction components. This is the default. (默认值为 None)	Boolean
reference_system	Specifies how the direction component is measured. 1—Direction is measured in arithmetic coordinates. 0° points due east, and 90° points due north. 2—Direction is measured in geographic coordinates. 0° points due north, and 90° points due east. (默认值为 2)	Integer
mass_flow_angle_representation	Specifies the angle of mass flow. 0—From—The mass is flowing along the angle and moving toward the origin of the reference system. This is sometimes referred to as the meteorological convention. 1—To—The mass is flowing along the angle and moving away from the origin of the reference system. This is sometimes referred to as the oceanographic convention. (默认值为 From)	Integer
calculation_method [calculation_method,...]	Specifies the thinning method to be used to calculate the magnitude and direction value of a tile. Vector Average—The following calculation occurs for each pixel: convert direction and magnitude to U and V components, calculate the averages of U and V for all pixels in a tile, and then convert the average U and average V back to direction and magnitude. Nearest neighbor—Uses the value from the pixels closest to the center of the tile. Bilinear—Bilinear resampling will be performed on the tile. Cubic—Cubic convolution resampling will be performed on the tile. Minimum—The minimum pixel value of the tile. Maximum—The maximum pixel value of the tile. (默认值为 Vector Average)	String
symbology_name [symbology_name,...]	Specifies the name of the symbol depicting direction and magnitude. Single Arrow—A single arrow depicting direction and magnitude. Wind Barb—Wind barbs indicating wind direction and magnitude. Ocean Current—Ocean current symbol indicating current and magnitude. (默认值为 Single Arrow)	String

返回值

数据类型	说明
Raster	根据您的渲染参数显示的输出栅格。

代码示例

VectorFieldRenderer 示例

使用矢量符号可视化栅格中的流向和量级信息。

import arcpy

VectorFieldRenderer_raster = arcpy.sa.VectorFieldRenderer(out_vector_field_raster, 
           is_uv_components=False, reference_system='Geographic',
           mass_flow_angle_representation='from')