Creating New Terrain using XYZ Coordinates

[Tooben]

Hi Im new to Hec Ras and using it for habitat modelling in my thesis.
I need to create a Terrain out of XYZ points (originally .txt) therefore I displayed them as XY data converted the points into a raster and then into .flt. Ras mapper then imports the flt. file but doesn’t display a continuous terrain when zooming in. I then tried to create a terrain out of several .flt files with different cell sizes which improved the terrain but still im not satisfied with the result.

As far as I see it the problem is that I have not equidistant points in the first place ..

Hopefully someone has an idea I would appreciate any advice.

[Toby]

You most likely need to interpolate between your points before going to raster.

Try creating a TIN first then a raster. In Arc this is easy to do, create a shapefile from your xyz data, build a TIN or Terrain Geodatabase, and then convert the TIN or Terrain to raster.

You can also go open source with cloud compare. http://www.danielgm.net/cc/

One of many ways to do it in CC.
http://www.danielgm.net/cc/forum/viewtopic.php?t=1514

[sudanpokharel]

The easiest way to create a rater from x, y is to use arcgis. It is easier and it will interpolate the points too. Create the TIN file from csv.file and then convert that to TIN . Then use arcgis tool to convert TIN file to raster . you can find this procedure in you tube / try searching creating DEM from google earth co-ordinates .

Thanks

[Author]

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