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

[Elvis Dowson]

Hi Mike,
                   I'm just not sure about one thing. If the x, y  
values are to hold pixel co-ordinates, what will it's value range be  
for a [1201] [1201] array? Will in be x min =0  x max = 1201 y min = 0  
y max = 1201 ?

The elevation data is stored in meters, and it's a signed integer, so  
it's value can range from -32767 to 32767.

So, will the correct set of parameters for my SetDataExtents be 0 1201  
0 1201 -32767 32767 ?

Best regards,

Elvis Dowson


On Oct 13, 2008, at 5:32 PM, Michael Jackson wrote:

> http://www.vtk.org/doc/release/5.2/html/a00665.html#b853fba8decf9550e4678fa4f4ca9ad0
>
> Page 405 in the 4th edition of the "Visualization Toolkit" explains  
> what the data extents are.
>
> Basically they are the min/max (in x,y,z) of your data. For example  
> if your data was 100x 50 x10 but the actual minimum value was 1000,  
> 1000, 1000 (x, y, z) then your data extents would be 1000, 1101,  
> 1000, 1051, 1000, 1011 (Xmin, Xmax, Ymin, Ymax, Zmin, Zmax).
>
>