摘要
计算热点分析的 Getis-Ord Gi* 统计，然后对输出 Z 得分应用“冷色到暖色”的渲染类型。
插图
用法
语法
HotSpotsRendered_stats (Input_Feature_Class, Input_Field, Output_Layer_File, Output_Feature_Class, {Distance_Band_or_Threshold_Distance})| 参数 | 说明 | 数据类型 |
Input_Feature_Class | 将要执行热点分析的要素类。 | Feature Layer |
Input_Field | 要计算的数值字段（受害者人数、作业数和事件严重性等）。 | Field |
Output_Layer_File | 存储冷色到暖色渲染信息的图层文件。文件名中必须包含 .lyr 扩展名。 | Layer File |
Output_Feature_Class | 用于接收结果字段的输出要素类。 | Feature Class |
Distance_Band_or_Threshold_Distance (可选) | 指定一个距离中断值。热点分析会忽略指定的“距离范围或距离阈值”之外的要素。此参数值应以“输入要素类”坐标系的单位进行输入。但有一种情况例外：如果设置了“输出坐标系”环境变量，则此参数值应以该环境中设置的坐标系单位进行输入。如果将此字段留空，则将计算并应用默认距离值。 | Double |
代码示例
HotSpotAnalysisWithRendering 示例（Python 窗口）
以下 Python 窗口脚本演示了如何使用 HotSpotAnalysisWithRendering 工具。
import arcpy
arcpy.env.workspace = "C:/data"
arcpy.HotSpotsRendered_stats("911Count.shp", "ICOUNT", "911HotSpots_Rendered.lyr", "911HotSpots.shp")
HotSpotAnalysisWithRendering 示例（独立 Python 脚本）
以下独立 Python 脚本演示了如何使用 HotSpotAnalysisWithRendering 工具。
# Analyze the spatial distribution of 911 calls in a metropolitan area
# using the Hot-Spot Analysis with Rendering Tool (Local Gi*)
# Import system modules
import arcpy
# Set geoprocessor object property to overwrite existing output, by default
arcpy.gp.overwriteOutput = True
# Local variables...
workspace = "C:/Data"
try:
# Set the current workspace (to avoid having to specify the full path to the feature classes each time)
arcpy.env.workspace = workspace
# Copy the input feature class and integrate the points to snap
# together at 500 feet
# Process: Copy Features and Integrate
cf = arcpy.CopyFeatures_management("911Calls.shp", "911Copied.shp",
"#", 0, 0, 0)
integrate = arcpy.Integrate_management("911Copied.shp #", "500 Feet")
# Use Collect Events to count the number of calls at each location
# Process: Collect Events
ce = arcpy.CollectEvents_stats("911Copied.shp", "911Count.shp", "Count", "#")
# Hot Spot Analysis of 911 Calls
# Process: Hot Spot Analysis (Getis-Ord Gi*)
hs = arcpy.HotSpotsRendered_stats("911Count.shp", "ICOUNT", "911HotSpots_rendered.lyr","911HotSpots.shp")
except:
# If an error occurred when running the tool, print out the error message.
print arcpy.GetMessages()
环境
许可信息
- ArcGIS Desktop Basic: 是
- ArcGIS Desktop Standard: 是
- ArcGIS Desktop Advanced: 是