arcpy.3d.BuildTerrain(in_terrain, {update_extent})
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名称
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说明
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数据类型
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in_terrain
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要处理的地形数据集。
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Terrain Layer
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update_extent
（可选）
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当数据区域在编辑过程中变小时，将重新计算基于窗口大小的 terrain 数据集的数据范围。 如果数据范围增加，或者 terrain 数据集是基于 z 容差的，则无需使用此命令。 它将扫描所有 terrain 数据以确定新范围。
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String
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派生输出
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名称
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说明
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数据类型
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derived_out_terrain
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更新后的 Terrain。
|
Terrain Layer
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代码示例
BuildTerrain 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：
arcpy.env.workspace = 'C:/data'
arcpy.ddd.BuildTerrain('test.gdb/featuredataset/terrain')
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)
# Run TinDomain
arcpy.ddd.TinDomain(tin, tinDomain, 'POLYGON')
arcpy.AddMessage("Exporting TIN breaklines...")
breaklines = "{0}/breaklines".format(fd)
# Run TinLine
arcpy.ddd.TinLine(tin, breaklines, "Code")
arcpy.AddMessage("Exporting TIN nodes...")
masspoints = "{0}/masspoints".format(fd)
# Run TinNode
arcpy.ddd.TinNode(sourceTIN, TIN_nodes)
arcpy.AddMessage("Creating terrain dataset...")
terrain = "terrain_from_tin"
# Run 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"]
# Run 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)
# Run AddFeatureClassToTerrain
arcpy.ddd.AddFeatureClassToTerrain(terrain, inFeatures)
arcpy.AddMessage("Building terrain...")
# Run BuildTerrain
arcpy.ddd.BuildTerrain(terrain, "NO_UPDATE_EXTENT")
arcpy.GetMessages()
except arcpy.ExecuteError:
print(arcpy.GetMessages())
except Exception as err:
print(err)