关于arcgis的python脚本编程， shape文件出png图片问题

1、点类型的转栅格：

PointToRaster example 1 (Python 
window)


Converts point features to a raster dataset.

import arcpy
from arcpy import env
env.workspace = "c:/data"
arcpy.PointToRaster_conversion("ca_ozone_pts.shp", "ELEVATION", 
                                "c:/output/ca_elev", "MAXIMUM", "", 2000)

PointToRaster example 2 
(stand-alone script)

Converts point features to a raster dataset.

# Name: PointToRaster_Ex_02.py
# Description: Converts point features to a raster dataset.
# Requirements: ArcInfo

# Import system modules
import arcpy
from arcpy import env

# Set environment settings
env.workspace = "C:/data"

# Set local variables
inFeatures = "ca_ozone_pts.shp"
valField = "ELEVATION"
outRaster = "c:/output/ca_elev02"
assignmentType = "MAXIMUM"
priorityField = ""
cellSize = 2000

# Execute PointToRaster
arcpy.PointToRaster_conversion(inFeatures, valField, outRaster, 
                               assignmentType, priorityField, cellSize)

2、面类型的转栅格：

PolygonToRaster example 1 
(Python window)

Converts polygon features to a raster dataset.

import arcpy
from arcpy import env
env.workspace = "c:/data"
arcpy.PolygonToRaster_conversion("ca_counties.shp", "NAME", 
                                 "c:/output/ca_counties.img", 
                                 "MAXIMUM_AREA", "MALES", 0.25)

PolygonToRaster example 2 
(stand-alone script)

Converts polygon features to a raster dataset.

# Name: PolygonToRaster_Ex_02.py
# Description: Converts polygon features to a raster dataset.
# Requirements: ArcInfo

# Import system modules
import arcpy
from arcpy import env

# Set environment settings
env.workspace = "C:/data"

# Set local variables
inFeatures = "ca_counties.shp"
valField = "NAME"
outRaster = "c:/output/ca_counties"
assignmentType = "MAXIMUM_AREA"
priorityField = "MALES"
cellSize = 0.5

# Execute PolygonToRaster
arcpy.PolygonToRaster_conversion(inFeatures, valField, outRaster, 
                                 assignmentType, priorityField, cellSize)

3、线类型转栅格

PolylineToRaster example 1 
(Python window)

Converts polyline features to a raster dataset.

import arcpy
from arcpy import env
env.workspace = "c:/data"
arcpy.PolylineToRaster_conversion("roads.shp", "CLASS", "c:/output/roads.img",
                                   "MAXIMUM_COMBINED_LENGTH", "LENGTH", 30) 

PolylineToRaster example 2 
(stand-alone script)

Converts polyline features to a raster dataset.

# Name: PolylineToRaster_Ex_02.py
# Description: Converts polyline features to a raster dataset.
# Requirements: ArcInfo

# Import system modules
import arcpy
from arcpy import env

# Set environment settings
env.workspace = "C:/data"

# Set local variables
inFeatures = "roads.shp"
valField = "CLASS"
outRaster = "c:/output/roads.tif"
assignmentType = "MAXIMUM_COMBINED_LENGTH"
priorityField = "LENGTH"
cellSize = 30

# Execute PolylineToRaster
arcpy.PolylineToRaster_conversion(inFeatures, valField, outRaster, 
                                  assignmentType, priorityField, cellSize)

上段代码运行出错就是因为程序认为No是个字符串啊，把No直接改成1运行没有问题 Traceback (most recent call last): File "C:\Documents and Settings\Administrator\桌面\a.py", line 18, in select("XYSheet1.shp","XYSheet1_Select1.shp","\"矿区编号\" =No") File "C:\Documents and Settings\Administrator\桌面\a.py", line 16, in select arcpy.Select_analysis(in_features, out_feature_class, where_clause) File "E:\ArcGIS\Desktop10.0\arcpy\arcpy\analysis.py", line 88, in Select raise eExecuteError: ERROR 999999: 执行函数时出错。指定了不存在的列。指定了不存在的列。执行(Select)失败。