[gdal-dev] Reading NetCDF using VB.NET

[Siebe Bosch]

Following your third link, I had already found the section that reads:


        GDAL and MapServer build SDK packages (provides to compile
        MapServer and GDAL by yourself):

I assumed that this meant that I had to compile the DLL myself. Hence my 
previous mail.

Considering your last mail however I tried to look up a pre-built DLL 
inside the SDK, and I found this one:
c:\GDALVS\release-1600\bin\gdal\csharp\gdal_csharp.dll

Is this the correct one?

I can add it to VS2008, however VS warns me that "the system cannot find 
the reference specified".





On 14-06-12 20:51, Etienne Tourigny wrote:
> If you read the GDAL download page [1] you will find this:
>
> "The latest FWtools version for Windows, 2.4.7, dates back to a
> pre-1.6 GDAL version. In order to benefit from the latest and
> greatest, you can refer to the other binary builds mentionned above."
>
> If you want to support netcdf files, you should probably be using a
> more recent gdal, at least 1.9
>
> That means you should probably not use FWTools, and use the SDK from
> Tamas Szekeres [3] - which according to [2] supports vb.net (C#)
>
> [1] http://trac.osgeo.org/gdal/wiki/DownloadingGdalBinaries
> [2] http://trac.osgeo.org/gdal/wiki/GdalOgrInCsharp
> [3] http://vbkto.dyndns.org/sdk/
>
> cheers
> Etienne
>
> On Thu, Jun 14, 2012 at 2:08 PM, Siebe Bosch<siebe at hydroconsult.nl>  wrote:
>> Hello all,
>>
>> I'm trying to build a command line application in VB.NET that extracts parts
>> from a NetCDF file.
>> For this I'm using the C# API as supplied with FWTools version 2.4.7. It's
>> supposed to support VB.NET as well; am I right?
>>
>> However, the application already crashes at the line Call GDAL.Registerall()
>> Here's the code:
>>
>> Imports System
>> Imports OSGeo.GDAL
>> Imports OSGeo.OGR
>>
>> Module MeteoBase
>>
>>   'Copyright Siebe Bosch Hydroconsult, 2012
>>   'Lulofsstraat 55, unit 47 Den Haag, The Netherlands
>>   'this program creates subsets from precipitation data in NetCDF-files
>>   'as requested by the user. The program is designed to be called from
>>   'a PHP-script.
>>
>>   Dim FileName As String
>>   Dim ds As Dataset
>>
>>   Sub Main()
>>     Dim DebugMode As Boolean
>>
>>     Console.WriteLine("This program extracts data from a NetCDF file")
>>     Console.WriteLine("Path to the NetCDF file (*.cn)")
>>     DebugMode = True
>>
>>     'start reading the command line arguments
>>     If DebugMode Then
>>       FileName = "c:\GDAL\PM\1990\EVAP_PM_19901231.nc"
>>     Else
>>       If My.Application.CommandLineArgs.Count = 0 Then
>>         Console.WriteLine("Enter the path to the NetCDF-file:")
>>         FileName = Console.ReadLine()
>>       ElseIf My.Application.CommandLineArgs.Count<>  1 Then
>>         Console.WriteLine("Error: incorrect number of arguments presented")
>>       Else
>>         FileName = My.Application.CommandLineArgs(0)
>>       End If
>>     End If
>>
>>     Try
>>       'start reading the NetCDF File
>>       Call Gdal.AllRegister()
>>       ds = Gdal.Open(FileName, Access.GA_ReadOnly)
>>       If ds Is Nothing Then
>>         Console.WriteLine("Cannot open NetCDF file: "&  FileName)
>>         Throw New Exception
>>       Else
>>         Console.WriteLine("Raster dataset parameters:")
>>         Console.WriteLine("  Projection: " + ds.GetProjectionRef())
>>         Console.WriteLine("  RasterCount: " + ds.RasterCount)
>>         Console.WriteLine("  RasterSize (" + ds.RasterXSize + "," +
>> ds.RasterYSize + ")")
>>       End If
>>     Catch ex As Exception
>>       Console.WriteLine("Error in sub Main of Meteobase")
>>     End Try
>>
>>   End Sub
>>
>> End Module
>>
>> _______________________________________________
>> gdal-dev mailing list
>> gdal-dev at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/gdal-dev


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The Netherlands

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