GB building WAsP roughness maps
josemijauregui
Global Mapper User
Dear developers,
We're considering purchasing GB in my company, and we'd like to know whether it's possible to build WAsP roughness maps from xyz point input information.
It should be a user-friendly semi-automatic procedure (similar to create contour height lines for xyz topography input information) and being able to export it to a WAsP compatible roughness map.
I've tried to see other answers, but didn't find exactly what we're looking for.
We can't really go through each of the polygons, assign double values manually...
If this is possible please let us know how?
If it's not possible please tell us if you're planning to include this option in further developments,
I think this is important for wind energy topics,
Thank you very much,
Best regards,
Jose Miguel Jauregui
We're considering purchasing GB in my company, and we'd like to know whether it's possible to build WAsP roughness maps from xyz point input information.
It should be a user-friendly semi-automatic procedure (similar to create contour height lines for xyz topography input information) and being able to export it to a WAsP compatible roughness map.
I've tried to see other answers, but didn't find exactly what we're looking for.
We can't really go through each of the polygons, assign double values manually...
If this is possible please let us know how?
If it's not possible please tell us if you're planning to include this option in further developments,
I think this is important for wind energy topics,
Thank you very much,
Best regards,
Jose Miguel Jauregui
Comments
-
Jose,
There is not currently a way to automatically generate roughness data from terrain, but this is on our todo list for inclusion in a future release.
Thanks,
Mike
Global Mapper Support
support@globalmapper.com -
Thanks Mike,
I hope there's an early release with this option implemented.
This would be very useful for wind energy and the vaste community associated.
Please keep me posted with news regarding this issue,
Regards
Jose -
Jose,
It's on our high-priority todo list, so assuming it doesn't turn out to be too hard to do it will be in the v13 release.
Thanks,
Mike
Global Mapper Support
support@globalmapper.com -
Dear Mike,
AS we talked some time ago, I've just seen that the new release of GB 13 just came out. Have you managed to include the capability of building WAsP compatible roughness maps from xyz roughness data?
Thank you very much
Best regards
Jose Miguel Jauregui -
Jose,
If you already have XYZ roughness data (and not just terrain) then you can export that to WindSim GWS files after gridding it using the File->Export Elevation Data menu command. We have not yet added the ability to generate new roughness data from just terrain, but are hoping to do that soon.
Thanks,
Mike
Global Mapper Support
support@globalmapper.com -
Thanks Mike,
WindSim is a quite expensive software and most people working in the wind energy market don't use it.
What we would need in the capability to build WAsP roughness maps from xyr data (x coordinate, y coordinate, roughness value); this data is totally independent from elevation data.
So the tool would build the roughness contour lines from this xyr data
Please let me know if you see this coming and your views,
Thank ou very much
Regards
Jose -
Jose,
If you have XY-roughness data, just load it using the File->Open Generic ASCII Data File menu command and grid the data (it will be treated as elevation, then use File->Generate Contours to create roughness contours from the data.
Let me know if I can be of further assistance.
Thanks,
Mike
Global Mapper Support
support@globalmapper.com -
Mike,
It won't work thay way you're saying because roughness contour lines have two values, one outside the contour and another one inside the contour; this is why roughness contours can't be treated as elevation contours and a special tool is required, please let me know of you're planning to include it in a future version,
Thanks
REgards -
We are planning on adding direct support for generating roughness grids from terrain in the near future. You are correct because of how roughness works they aren't really roughness contours, just roughness boundary lines.
Thanks,
Mike
Global Mapper Support
support@globalmapper.com -
If you have a roughness grid you can use the equal-value area creation option from the Control Center to create roughness areas, it is just roughness boundary lines that are tougher to generate.
Thanks,
Mike
Global Mapper Support
support@globalmapper.com
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