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Countour Shapefile to Raster or DEM then overlay point (on Raster/DEM) to return the elevation of that point

  • January 30, 2015
  • 3 replies
  • 85 views
L
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OK I'm looking for the easiest way to accomplish this task.

 

 

I'm provided with a contour shapefile. I need to convert the contour shapefile to a raster or DEM. Then I have centerpoints for 1185 polylines (all 1185 lines have only two vertices, so getting the center has been easy). I want to overlay the centerpoints of all 1185 polylines on the contour raster/dem to extract the elevation at that exact point. I will then add 1100 to all of the values (Example: Elevation 5803 would become Elevation 6903) and write it back to a field in the polyline layer the centerpoints originally came from.

 

 

Can anyone point me in the right direction to accomplish this?

Best answer by takashi

Hi,

 

 

The SurfaceDraper or the SurfaceModeller might help you.

 

Send the contour features (3D lines) to the Points/Lines port; send the points to the DrapeFeatures port. Draped points having elevation as z-coordinate will be output from the DrapedFeatures port.

 

 

Takashi
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3 replies

takashi
Celebrity
  • takashiCelebrity
  • Best Answer
  • January 31, 2015
Hi,

 

 

The SurfaceDraper or the SurfaceModeller might help you.

 

Send the contour features (3D lines) to the Points/Lines port; send the points to the DrapeFeatures port. Draped points having elevation as z-coordinate will be output from the DrapedFeatures port.

 

 

Takashi
Why not inspect features with Visual/Data Preview and Feature/Record Information before writing them into a destination dataset?
gio
Contributor
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  • gioContributor
  • Contributor
  • January 31, 2015
yeah, drape the points on surface cretred with countourlines.

 

SurfaceModeller.

 

Extract z from drapedfeatures.
L
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  • longhornfan
  • Author
  • February 2, 2015
Thank you Takashi and Gio! I will say it every time ... FME Users are without a doubt the most helpful and knowledgeable group of users I've ever come across. 

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