TIN Aspect (3D Analyst)

Сводка

Extracts the directional orientation of input TIN to an output polygon feature class.

Прежние версии:

This is a deprecated tool that has been superseded by the Surface Aspect tool.

Иллюстрация

TIN Aspect illustration

Использование

  • Aspect is expressed in degrees.

  • Aspect represents the horizontal orientation of a surface and is determined in units of degrees. Each facet of the surface is assigned a code value which represents the cardinal or ordinal direction of its slope, and contiguous areas with the same code are merged into one feature. The default classification scheme is defined as follows:

    CodeSlope DirectionSlope Angle Range

    -1

    Flat

    No Slope

    1

    North

    0° – 22.5°

    2

    Northeast

    22.5° – 67.5°

    3

    East

    67.5° – 112.5°

    4

    Southeast

    112.5° – 157.5°

    5

    South

    157.5° – 202.5°

    6

    Southwest

    202.5° – 247.5°

    7

    West

    247.5° – 292.5°

    8

    Northwest

    292.5° – 337.5°

    9

    North

    337.5° – 360°

  • Customized class definitions can be provided through a Class Breaks Table. The table must have two columns where the first indicates the aspect break point in degrees and the second defines its code value. Consider the following example:

    BreakAspect_Code

    90.0

    1

    180.0

    2

    270.0

    3

    360.0

    4

    The table can be in any supported format (.dbf, .txt, or geodatabase table). The name of the fields are irrelevant, as the first will always be used for the class breaks and the second for the aspect codes.

Синтаксис

arcpy.3d.TinAspect(in_tin, out_feature_class, {class_breaks_table}, {aspect_field})
ParameterОбъяснениеТип данных
in_tin

The input TIN.

TIN Layer
out_feature_class

The output feature class.

Feature Class
class_breaks_table
(Дополнительный)

An input table containing the classification breaks that will be used to classify the output feature class.

Table
aspect_field
(Дополнительный)

The field containing aspect values.

String

Пример кода

TINAspect example (Python window)

The following Python Window script demonstrates how to use the TIN Aspectfunction in immediate mode.

import arcgisscripting
gp = arcgisscripting.create()

gp.workspace = "C:/data"
gp.TinAspect_3d("tin", "aspect.shp")

Информация о лицензиях

  • Basic: Требуется 3D Analyst
  • Standard: Требуется 3D Analyst
  • Advanced: Требуется 3D Analyst