描绘 TIN 数据区 (3D 分析)
插图
用法
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此工具用于修改输入 TIN。如果您不希望修改输入,则考虑在使用该工具前,使用复制 TIN 工具来生成副本。
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最大边长的值最好由 TIN 中视为有效数据区的区域内结点的平均间距来确定。因此请提供一个大于平均间距的值。
语法
DelineateTinDataArea_3d (in_tin, max_edge_length, {method})
参数 | 说明 | 数据类型 |
in_tin |
The input TIN. | TIN Layer |
max_edge_length |
至少有一条边大于 <max_edge_length> 的三角形将被掩膜为 NODATA。此类三角形将不会在地图中得到渲染并且也不会用于表面分析(如插值)。长度为 2D 距离。 | Double |
method (可选) |
用来描绘 TIN 数据区的方法。
| String |
代码示例
DelineateTINDataArea 示例 1(Python 窗口)
The following sample demonstrates the use of this tool in the Python window:
import arcpy from arcpy import env arcpy.CheckOutExtension("3D") env.workspace = "C:/data" arcpy.DelineateTinDataArea_3d("elevation", 10, "PERIMETER_ONLY")
DelineateTINDataArea 示例 2(独立脚本)
The following sample demonstrates the use of this tool in a stand-alone Python script:
'''**************************************************************************** Name: Define Data Boundary of LAS File Description: This script demonstrates how to delineate data boundaries of LAS files with irregularly clustered points. It is intended for use as a script tool with one input LAS file. ****************************************************************************''' # Import system modules import arcpy import exceptions, sys, traceback # Set local variables inLas = arcpy.GetParameterAsText(0) #input LAS file ptSpacing = arcpy.GetParameterAsText(1) # LAS point spacing classCode = arcpy.GetParameterAsText(2) # List of integers returnValue = arcpy.GetParameterAsText(3) # List of strings outTin = arcpy.GetParameterAsText(4) # TIN created to delineate data area outBoundary = arcpy.GetParameterAsText(5) # Polygon boundary file try: arcpy.CheckOutExtension("3D") # Execute LASToMultipoint arcpy.AddMessage("Creating multipoint features from LAS...") lasMP = arcpy.CreateUniqueName('lasMultipoint', 'in_memory') arcpy.ddd.LASToMultipoint(inLas, LasMP, ptSpacing, class_code, "ANY_RETURNS", "", sr, inFormat, zfactor) # Execute CreateTin arcpy.AddMessage("Creating TIN dataset...") arcpy.ddd.CreateTin(outTin, sr, "{0} Shape.Z masspoints"\ .format(lasMP), "Delaunay") # Execute CopyTin arcpy.AddMessage("Copying TIN to delineate data boundary...") arcpy.ddd.CopyTin(outTin, "{0}_copy".format(outTin)) # Execute DelineateTinDataArea arcpy.AddMessage("Delineating TIN boundary...") maxEdge = ptSpacing * 4 arcpy.ddd.DelineateTinDataArea(outTin, maxEdge, "PERIMETER_ONLY") # Execute TinDomain arcpy.AddMessage("Exporting data area to polygon boundary...") arcpy.ddd.TinDomain(outTin, outBoundary, "POLYGON") arcpy.AddMessage("Finished") arcpy.CheckInExtension("3D") 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)
相关主题
许可信息
ArcView: 需要 3D Analyst
ArcEditor: 需要 3D Analyst
ArcInfo: 需要 3D Analyst
7/10/2012