| 标注 | 说明 | 数据类型 |
输入 TIN | 将处理的 TIN 数据集。 | TIN Layer |
输出要素类 | 将生成的要素类。 | Feature Class |
编码字段 (可选) | 定义隔断线类型的输出要素类中的字段名称。默认字段名称为 Code。 | String |
摘要
可将不规则三角网 (TIN) 数据集的隔断线导出到 3D 线要素类。
插图
使用情况
输出线会将标识每条隔断线类型的整型值作为属性。这些代码存储在名称由代码字段参数定义的字段中，各值含义定义如下：
- 1 - 软隔断线，表示坡度平缓变化。
- 2 - 硬隔断线，表示坡度突变。
要生成线要素，TIN 中必须存在一些针对该工具的隔断线。如果无论隔断线如何都希望获得三角边，请考虑使用 TIN 边工具。
参数
arcpy.ddd.TinLine(in_tin, out_feature_class, {code_field})| 名称 | 说明 | 数据类型 |
in_tin | 将处理的 TIN 数据集。 | TIN Layer |
out_feature_class | 将生成的要素类。 | Feature Class |
code_field (可选) | 定义隔断线类型的输出要素类中的字段名称。默认字段名称为 Code。 | String |
代码示例
下面的示例演示了如何在 Python 窗口中使用此工具。
arcpy.env.workspace = 'C:/data'
arcpy.ddd.TinLine('tin', 'tin_line.shp', code_field='BreakType')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
# 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:
# 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 Exception as err:
print(err)