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I want to calculate distance from aspect and slope on a raster. Both raster have same resolution. Could someone help on this? I am novice on raster dataset in FME. Thank you in advance.

  • November 28, 2021
  • 3 replies
  • 17 views

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I want to calculate distance from aspect and slope on a raster. Both raster have same resolution. Could someone help on this? I am novice on raster dataset in FME. Thank you in advance.

3 replies

hkingsbury
Celebrity
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  • Celebrity
  • November 28, 2021

I'm struggling to get what you mean by "distance"... Can you explain the problem in a bit more depth?


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  • Author
  • November 29, 2021
hkingsbury wrote:

I'm struggling to get what you mean by "distance"... Can you explain the problem in a bit more depth?

I am try to distance from attached formula.


hkingsbury
Celebrity
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  • Celebrity
  • November 29, 2021
manunav wrote:

I am try to distance from attached formula.

I think I follow with what you're trying to achieve... Are you wanting to get the length of a line overlaid on a 3d surface?

 

If thats the case there is a much easier approach, assuming that you have a DEM of the area (this wouldve been used to derive the slope and aspect)

 

Use your DEM to create a surface, then using the SurfaceDraper, drape the line features over the surface so they have Z values, then use a length calculator with the dimensions set to 3 to calculate your length


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