1 Topic by philzmz (edited by philzmz 2021-06-07 07:48:59)

  • Registered: 2017-12-08
  • Posts: 179

Topic: Convert ASC to RAW to get better elevation values ?

As you know, I am trying to get a better precision for the terrain elevations in RWT.
I found a link to download (for free) elevations to 1m precision (or 5 or 25...) which is much better than what I get with RWT elevation providers.

https://geoservices.ign.fr/documentatio … e-alti-5-m

The values are in .ASC file (ASCII) which consists in a grid of values.

My concern is now to find a way to use these values with RWT. Maybe the easiest way to me would be (if this is possible) to generate a raw file using these values and replace the original RAW generated by RWT with this one ?

Maybe there is better way ? Any ideas are welcome !

I posted one of the asc files with a 5m resolution on this link if you want to have a look.
https://we.tl/t-v0021B8gXb

Best regards.

Phil

  • Registered: 2015-06-23
  • Posts: 3,778

Re: Convert ASC to RAW to get better elevation values ?

Hello.

This can be done in this way:
https://forum.infinity-code.com/viewtopic.php?id=1538

Kind Regards,
Infinity Code Team.

Boost your productivity a lot and immediately using Ultimate Editor Enhancer. Trial and non-commerce versions available.
  • Registered: 2017-12-08
  • Posts: 179

Re: Convert ASC to RAW to get better elevation values ?

Thanks,

I put the script as requested and now I have a new RWT item in the menu, and elevations are intercepted.

As far as I can understand the script (as already said, C# is not my cup of tea...) when isIntercepted = true, I have to get the elevation data by myself adding the appropriate code in the C# script?

So for instance, if my terrain is 1x1km and if I have 1 elevation point each 25 meters, I need to have a file with 40x40 = 1600 heights that will be "included" in the terrain, right?

Is there somewhere a tutorial ? Or an example using a text file with heights ?

Is there no way to build a RAW elevation file from a raster, and the replace the original RAW file ?

Best regards, Phil

  • Registered: 2015-06-23
  • Posts: 3,778

Re: Convert ASC to RAW to get better elevation values ?

Yes, I know you, and I know that you probably won't be able to do it yourself.
In a different situation, I would just send you a script for your data.
This is not a difficult and not very long task (2-4 hours).
But, unfortunately, until the beginning of July I have no free time at all.
If you can wait until July, I'll make this script for you.

Kind Regards,
Infinity Code Team.

Boost your productivity a lot and immediately using Ultimate Editor Enhancer. Trial and non-commerce versions available.