Question

如何在arcgis的toolbox里讲geodatabase中的栅格数据集为jpg等格式？

我是想用python写脚本，那位仁兄知道？就麻烦告诉一下，不胜感动与感激！

Answer 1

toolbox里有现成的工具，这是他的脚本，如果想看脚本，工具点右键，edit就看到了，一个是运行窗口，一个是脚本窗口

"""********************************************************************************************************************
TOOL NAME: RasterToOtherFormat
SOURCE NAME: ExportRasters.py
AUTHOR: Environmental Systems Research Institute Inc.
REQUIRED ARGUMENTS: Input rasters
Output geodatabase
OPTIONAL ARGUMENTS: Raster format

TOOL DESCRIPTION: Converts or copies one or more Rasters to a workspace, the input Rasters can be file Rasters, or Geodatabase Rasters, the output parameter will be a workspace.
The optional raster format controls the outpur raster datset format, by default, the format is GRID

The name of the output Raster will be based on the name of the input name, but will be unique for
the destination workspace.

Date Created: 11/20/2003
Update: 5/26/2005
Updated: 4/27/2007 add progressor
Updated: 9/18/2007
- use arcgisscripting.create(9.3)
- add progress bar to indicate percent of work done
- centralize error messages with error number

Usage: RasterToOtherFormat <Input_rasters;Input_rasters...> <Output_workspace> {GRID | IMAGINE Image | TIFF | }

*********************************************************************************************************************"""

import ConversionUtils, time

msgWorkspace=ConversionUtils.gp.GetIDMessage(86127) #"Output location does not exist: "
msgSuccess= ConversionUtils.gp.GetIDMessage(86128) #"Successfully converted: "
msgFail=ConversionUtils.gp.GetIDMessage(86129) #"Failed to convert: "
msgConverting = ConversionUtils.gp.GetIDMessage(86130) #"Converting "

# Argument 1 is the list of Rasters to be converted
inRasters = ConversionUtils.gp.GetParameterAsText(0)

# The list is split by semicolons ";"
inRasters = ConversionUtils.SplitMultiInputs(inRasters)

# The output workspace where the shapefiles are created
outWorkspace = ConversionUtils.gp.GetParameterAsText(1)

# Set the destination workspace parameter (which is the same value as the output workspace)
# the purpose of this parameter is to allow connectivity in Model Builder.
# ConversionUtils.gp.SetParameterAsText(2,outWorkspace)
ext = ConversionUtils.gp.GetParameterAsText(2)

# Get proper extension based on the format string
if (ext == "IMAGINE Image"):
ext = ".img"
elif (ext == "TIFF"):
ext = ".tif"
elif (ext == "BMP"):
ext = ".bmp"
elif (ext == "PNG"):
ext = ".png"
elif (ext == "JPEG"):
ext = ".jpg"
elif (ext == "JP2000"):
ext = ".jp2"
elif (ext == "GIF"):
ext = ".gif"
elif (ext == "GRID"):
ext = ""
elif (ext == "BIL"):
ext = ".bil"
elif (ext == "BIP"):
ext = ".bip"
elif (ext == "BSQ"):
ext = ".bsq"
elif (ext == "ENVI DAT"):
ext = ".dat"

# Add progressor
rastercnt = len(inRasters)
ConversionUtils.gp.SetProgressor("step", msgConverting, 0, rastercnt, 1)
currentloc = 1

# Loop through the list of input Rasters and convert/copy each to the output geodatabase or folder
for raster in inRasters:
try:
ConversionUtils.gp.SetProgressorLabel(msgConverting + "%s (%d/%d)" % (raster, currentloc, rastercnt))
raster = ConversionUtils.ValidateInputRaster(raster)

outRaster = ConversionUtils.GenerateRasterName(raster, outWorkspace, ext)

# Copy/Convert the inRaster to the outRaster
ConversionUtils.CopyRasters(raster, outRaster, "")

# If the Copy/Convert was successfull add a message stating this
ConversionUtils.gp.AddMessage(msgSuccess + "%s To %s" % (raster, outRaster))

currentloc += 1

except Exception, ErrorDesc:
# Except block for the loop. If the tool fails to convert one of the Rasters, it will come into this block
# and add warnings to the messages, then proceed to attempt to convert the next input Raster.
msgWarning = msgFail + "%s" % input
msgStr = ConversionUtils.gp.GetMessages(2)
ConversionUtils.gp.AddWarning(ConversionUtils.ExceptionMessages(msgWarning, msgStr, ErrorDesc))

ConversionUtils.gp.SetProgressorPosition()

time.sleep(0.5)

追问

兄台，你说的是raster to geodatabase，我想做的是geodatebase 到raster，怎么做呢？

追答

这个是把raster（如tif、grid、img）转为jpg等格式的数据
不明白你什么意思，是把矢量的转为grid，然后在转jpg？

追问

搞好了，非常谢谢你！再想问一下，存储在geodatebase中的栅格数据，我在写脚本的时候，应该怎样定义geodatebase中栅格数据集的路径呢？因为本身geodatebase中的文件我们是看不出哪个是自己想要的栅格数据集。这个问题其实就是问 ，程序中，我们如何访问geodatebase中的数据文件！望不吝赐教。。。。

追答

你这是file geodatabase的格式，如何用python访问这不是一两句话能说清楚 ，最好自己看看帮助和python示例代码，在arcscirpts.esri.com站点上有个“Demo Python script that does everything”，你可以下载看看，里面很多基本功能的示例代码