[vtkusers] How to import NASA SRTM DEM data into VTK

[Elvis Dowson]

Hi,
            Can VTK import DEM data from any of the following file  
formats? I ask this because the input to vtkDEMReader is an ASCII file  
format. Please help! :-)

VRT 
,GTiff 
,NITF 
,HFA 
,ELAS 
,AAIGrid 
,DTED 
,PNG 
,JPEG 
,MEM 
,GIF 
,XPM 
,BMP 
,PCIDSK 
,PCRaster 
,ILWIS 
,SRTMHGT 
,Leveller 
,Terragen 
,GMT 
,netCDF 
,PNM 
,ENVI 
,EHdr,PAux,MFF,MFF2,BT,IDA,ERS,FIT,RMF,RST,INGR,GSAG,GSBG,USGSDEM,ADRG

Best regards,

Elvis Dowson


On Oct 12, 2008, at 12:56 PM, Elvis Dowson wrote:

> Hi,
>         How can I import NASA SRTM DEM data, stored in a file format  
> called hgt, into VTK-5.3.x?
>
> Apparently the *hgt file format can just be renamed to *.dem, but  
> the contents of the file are stored in a format called GTOPO30 DEM,  
> I think.
>
> When I opened the SainteHelens.dem file supplied with the VTK Data  
> package, I can see that it consists of ascii values and is human- 
> readable.
>
> However, when I look at a NASA SRTM file, it appears to be some sort  
> of binary file format.
>
> Here is an example of a NASA SRTM file ftp://e0srp01u.ecs.nasa.gov/srtm/version2/SRTM3/Australia/S34E150.hgt.zip
>
> vtkDEMReader will not directly work with the NASA SRTM file.
>
> Has someone implemented a reader that will read in the NASA SRTM file?
>
> If someone can help point me in the right direction, I can even  
> spend some time and try to implement a new vtkSRTMReader class.
>
> Best regards,
>
> Elvis Dowson
>
>

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