TIN 结点 (3D Analyst)

摘要

可将不规则三角网 (TIN) 数据集的结点导出到点要素类。

插图

用法

• 为点字段参数填充名称会创建 2D 点要素类。忽略该名称会创建 3D 点。

• 如果 TIN 已将标签值分配给三角形，通过在标签值字段参数中指定名称可使点将这些值作为属性。未显式分配标签值的所有结点都默认使用值 0。

语法

TinNode_3d (in_tin, out_feature_class, {spot_field}, {tag_field})

参数	说明	数据类型
in_tin	输入 TIN。	TIN Layer
out_feature_class	输出要素类。	Feature Class
spot_field (可选)	输出要素类的高程属性字段的名称。如果指定名称，要素类将是 2D 的；否则，要素类将是 3D 的。默认情况下不提供任何名称，这会创建 3D 点要素。	String
tag_field (可选)	将标签属性存储在输出要素类中的字段的名称。默认情况下，不创建任何标签值字段。	String

代码实例

Tin 结点 (TinNode) 示例 1（Python 窗口）

下面的示例演示了如何在 Python 窗口中使用此工具：

import arcpy
from arcpy import env

arcpy.CheckOutExtension('3D')
env.workspace = 'C:/data'
arcpy.TinNode_3d('tin', 'elevation_node.shp', '', 'Tag_Value')

Tin 结点 (TinNode) 示例 2（独立脚本）

下面的示例演示了如何在独立 Python 脚本中使用此工具：

"""****************************************************************************
Name: Create Terrain from TIN
Description: This script demonstrates how to create a terrain dataset using
             features extracted from a TIN. It is particularly useful in 
             situations where the source data used in the TIN is not available,
             and the amount of data stored in the TIN proves to be too large 
             for the TIN. The terrain's scalability will allow improved
             display performance and faster analysis. The script is designed 
             to work as a script tool with 5 input arguments.
****************************************************************************"""
# Import system modules
import arcpy
import exceptions, sys, traceback
from arcpy import env

# Set local variables
tin = arcpy.GetParameterAsText(0) # TIN used to create terrain
gdbLocation = arcpy.GetParameterAsText(1) # Folder that will store terran GDB
gdbName = arcpy.GetParameterAsText(2) # Name of terrain GDB
fdName = arcpy.GetParameterAsText(3) # Name of feature dataset
terrainName = arcpy.GetParameterAsText(4) # Name of terrain

try:
    arcpy.CheckOutExtension("3D")
    # Create the file gdb that will store the feature dataset
    arcpy.management.CreateFileGDB(gdbLocation, gdbName)
    gdb = '{0}/{1}'.format(gdbLocation, gdbName)
    # Obtain spatial reference from TIN
    SR = arcpy.Describe(tin).spatialReference
    # Create the feature dataset that will store the terrain
    arcpy.management.CreateFeatureDataset(gdb, fdName, SR)
    fd = '{0}/{1}'.format(gdb, fdName)
    # Export TIN elements to feature classes for terrain
    arcpy.AddMessage("Exporting TIN footprint to define terrain boundary...")
    boundary = "{0}/boundary".format(fd)
    # Execute TinDomain
    arcpy.ddd.TinDomain(tin, tinDomain, 'POLYGON')
    arcpy.AddMessage("Exporting TIN breaklines...")
    breaklines = "{0}/breaklines".format(fd)
    # Execute TinLine
    arcpy.ddd.TinLine(tin, breaklines, "Code")
    arcpy.AddMessage("Exporting TIN nodes...")
    masspoints = "{0}/masspoints".format(fd)
    # Execute TinNode
    arcpy.ddd.TinNode(sourceTIN, TIN_nodes)
    arcpy.AddMessage("Creating terrain dataset...")
    terrain = "terrain_from_tin"
    # Execute CreateTerrain
    arcpy.ddd.CreateTerrain(fd, terrainName, 10, 50000, "", 
                            "WINDOWSIZE", "ZMEAN", "NONE", 1)
    arcpy.AddMessage("Adding terrain pyramid levels...")
    terrain = "{0}/{1}".format(fd, terrainName)
    pyramids = ["20 5000", "25 10000", "35 25000", "50 50000"]
    # Execute AddTerrainPyramidLevel
    arcpy.ddd.AddTerrainPyramidLevel(terrain, "", pyramids)
    arcpy.AddMessage("Adding features to terrain...")
    inFeatures = "{0} Shape softclip 1 0 10 true false boundary_embed <None> "\
             "false; {1} Shape masspoints 1 0 50 true false points_embed "\
             "<None> false; {2} Shape softline 1 0 25 false false lines_embed "\
             "<None> false".format(boundary, masspoints, breaklines)
    # Execute AddFeatureClassToTerrain
    arcpy.ddd.AddFeatureClassToTerrain(terrain, inFeatures) 
    arcpy.AddMessage("Building terrain...")
    # Execute BuildTerrain
    arcpy.ddd.BuildTerrain(terrain, "NO_UPDATE_EXTENT")
    arcpy.GetMessages()

except arcpy.ExecuteError:
    print arcpy.GetMessages()
except:
    # Get the traceback object
    tb = sys.exc_info()[2]
    tbinfo = traceback.format_tb(tb)[0]
    # Concatenate error information into message string
    pymsg = "PYTHON ERRORS:\nTraceback info:\n{0}\nError Info:\n{1}"\
          .format(tbinfo, str(sys.exc_info()[1]))
    msgs = "ArcPy ERRORS:\n {0}\n".format(arcpy.GetMessages(2))
    # Return python error messages for script tool or Python Window
    arcpy.AddError(pymsg)
    arcpy.AddError(msgs)
finally:
    arcpy.CheckInExtension("3D")

环境

当前工作空间, 地理变换, 输出坐标系, 范围, 临时工作空间, XY 分辨率, XY 容差, Z 分辨率, Z 容差, 输出 Z 属性域, 输出配置关键字, 自动提交, 输出空间格网 1；输出空间格网 2；输出空间格网 3, 输出 XY 属性域

许可信息

ArcGIS for Desktop Basic: 需要 3D Analyst

ArcGIS for Desktop Standard: 需要 3D Analyst

ArcGIS for Desktop Advanced: 需要 3D Analyst