计算默认空间格网索引 (Data Management)

许可等级:BasicStandardAdvanced

摘要

为输入要素计算出一组有效的格网索引值(空间格网 1,2 和 3)。即使输入要素不支持建立空间格网索引,也可以计算出格网索引值。

了解有关空间索引的详细信息

用法

语法

CalculateDefaultGridIndex_management (in_features)
参数说明数据类型
in_features

要计算有效空间格网索引的要素。

Feature Layer; Raster Catalog Layer

代码实例

计算默认格网索引示例(Python 窗口)

以下 Python 窗口脚本演示了如何在即时模式下使用 CalculateDefaultGridIndex 功能。

import arcpy
from arcpy import env
env.workspace = "C:/data"
arcpy.CalculateDefaultGridIndex_management("rivers.shp")
计算默认格网索引示例 2(独立脚本)

以下独立脚本将在工作流中使用 CalculateDefaultGridIndex 功能更新 FC 的空间索引。

# Name: UpdateSI_Example.py
# Description: Use Calculate Default Grid Index to update the spatial index of a FC
# Author: ESRI

# Import system modules 
import arcpy
from arcpy import env

# Set the workspace
env.workspace = "C:/data/data.gdb"

# Set local parameters
inFeatures = "river"

try:
  # Get the grid sizes from the tool, this is a string with 3 semi-colon seperated values (typically something like "1500; 0; 0") 
  result = arcpy.CalculateDefaultGridIndex_management(inFeatures)
  indexGrids = []
  for count in range(0, result.outputCount):
    indexGrids.append(result.getOutput(count))

  # First remove the existing grid index
  try:
    arcpy.RemoveSpatialIndex_management(inFeatures)
  except:
    # if no index exists, RemoveSpaitalIndex will fail, but just keep going
    pass

  # Now add the indexes calculated by the tool
  arcpy.AddSpatialIndex_management(inFeatures, indexGrids)
 
except Exception, e:
  # If an error occurred, print line number and error message
  import traceback, sys
  tb = sys.exc_info()[2]
  print "Line %i" % tb.tb_lineno
  print e.args[0]

环境

此工具不使用任何地理处理环境

相关主题

许可信息

ArcGIS for Desktop Basic:是
ArcGIS for Desktop Standard:是
ArcGIS for Desktop Advanced:是
9/15/2013