NetCDF数据在ArcMap中的使用

1
分享 2018-12-21

NetCDF又称科学数据集,可以存储温度、湿度、风速、风向等多个维度的文件格式。

下图是NetCDF发布到ArcGIS Server后的展示。


1、在ArcMap中显示NetCDF数据

ArcMap不能直接读取NetCDF数据,需要使用GP工具Make NetCDF Raster Layer(创建NetCDF栅格图层),将NetCDF生成栅格图层。


2、显示特定年份的温度图层

方式一:直接在图层属性中设置。

方式二:使用GP工具Select by Dimention(按维度选择)。


3、按照时间动态展示数据

首先对图层启用时间,然后打开时间滑块。


4、按照年份,导出NetCDF的每幅栅格

1)设置NetCDF图层的波段维度为Year。

2)点击这里下载NetCDF_time_slice_to_Raster.zip,解压后,添加到目录窗口中,然后运行工具。

生成结果是以Band_命名的。我们可以稍微改下代码,以年份命名。打开脚本方法如下:

修改后的脚本如下:
# ---------------------------------------------------------------------------
# export_netCDF_slice.py
# Created on: 2011-06-02 10:18:49.00000
# Description: This scipt will create a TIFF raster from a NetCDF layer, and
# save each band of that TIFF as a seperate TIF raster (for each time slcie in a netcdf file)
# ---------------------------------------------------------------------------

# Import modules
import arcpy, os

#Inputs
Input_NetCDF_layer = arcpy.GetParameterAsText(0)
Output_Folder = arcpy.GetParameterAsText(1)

Input_Name = Input_NetCDF_layer
Output_Raster = Output_Folder + os.sep + "NetCDF_Raster.tif"

#Copy the NetCDF layer as a TIF file.
arcpy.CopyRaster_management(Input_Name, Output_Raster)
arcpy.AddMessage(Output_Raster + " " + "created from NetCDF layer")

#Reading number of band information from saved TIF
bandcount = arcpy.GetRasterProperties_management (Output_Raster, "BANDCOUNT")
resultValue = bandcount.getOutput(0)

count = 1

# Year
yearN = 1875

arcpy.AddMessage("Exporting individual bands from" + Output_Raster)

#Loop through the bands and copy bands as a seperate TIF file.
while count <= int(resultValue):
Input_Raster_Name = Output_Raster + os.sep+ "Band_" + str(count)
Output_Band = Output_Folder + os.sep + str(yearN) +".tif"
arcpy.CopyRaster_management(Input_Raster_Name, Output_Band)
arcpy.AddMessage("Band_" + str(count) +".tif" + " " "exported" + " " + "successfully")
yearN +=5
count +=1


# The following will delete the TIFF file that was created by CopyRaster tool.
arcpy.Delete_management(Output_Raster,"#")

arcpy.AddMessage("Tool Executed Successfully")




参考及扩展阅读
  1. NetCDF介绍
  2. NetCDF教程
  3. 导出NetCDF的每个图层
  4. 关于显示时态数据
  5. ArcGIS科学数据及公开课


文章来源:https://blog.csdn.net/ceibake/article/details/84787465

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