WEng 3 Release Notes

This document describes the new features and other changes made.

Version 3.01.0118  - Release E2

  • The DLL Rvea0126.dll - not necessary for WAsP Engineering 3.1 - has been removed from this installer.
    The Rvea0126.dll-version contained in previous WAsP Engineering installers had the negative side-effect of causing an error in WACA2 when creating an OEWC.

    After replacing a WAsP Engineering installation "Release E" with "Release E2" it may be necessary to delete the  Rvea0126.dll from the "...\Program files (x86)\WAsP\Bin" folder to re-establish WACA2 functionality - the proper version of Rvea0126.dll will automatically be installed next time you run a WAsP application needing it. 


Release E (version 3.01.0118)

  • Fixes a water roughness bug
  • Restores the ability to make displays in Google Earth
  • Includes the latest projection transformer component, thereby fixing a problem to read the Geo Projection database under Asian Windows versions.


Release D (version 3.01.0092)

  • A problem with bad abscissa labels in OEWC-POT plots has been fixed.


Release C (version 3.01.0086)

  • A problem regarding use of vector-maps has been fixed
  • The warnings regarding POT extreme wind estimation have been updated.
  • The on-line help has been updated
  • Some minor bugs have been fixed.

Release A (version

WAsP Engineering 3.1 brings new features:

  • Peak-over-threshold extreme wind climates, providing a mechanism to estimate 50 year wind speed maxima from a short time series of measurements.
    This feature is restricted to terrain that is not too complex. Specifically this means that the directional variation of speed-up should not be larger than a certain limit. See the help file for details.
  • Updates to the help file.
  • New report script for site flow inclination.
  • Streamlined, more reliable vector to grid map conversion, offering only the ‘Vulcan’ method

WAsP Engineering 3.1 fixes problems:

  • Terrain inclination rose script no longer requires a wind to be selected.
  • Turbulence intensity rose script works more reliably.
  • Project site changes more reliably reflected in spatial view refreshes.
  • WAT calculation launcher works with various versions of WASP more reliably.
  • Turbulence simulator now launches even if no vector map is included in the project.


WAsP Engineering 3.0

Release G:

  • Fixes a bug which prevented some long EWC calculations from completing in some maps.
  • Restores the look-up table options to proper functionality users who have installed WAsP 11.

Release F:

  • Problem loading WEng2 projects solved

Release E:

  • WAsP 11 compatibility for WAT calculations
  • Better WindPro compatibility on some systems
  • Grid configurations not discarded too easily in the “GridMaker” program
  • More correct vector map overlay drawing
Release D:



  • A back-prediction error of observed winds or extreme wind climates is corrected. The significance of this error increased with height above the ground and for projects with large areas of very different surface roughness, e.g. coastal sites with nearby forest or urban areas. The worst error we have observed was 6.7%, but it is typically much lower. The problem related to the choice of average surface roughness for the LINCOM flow model when calculating generalized wind by observed ones. Note that winds and extreme wind climates calculated by previous WEng3 release versions are now marked with warning signs in the object hierarchy. We recommend to recalculate these winds and extreme-wind climates in existing projects and also the REWC files exported to disc
  • The flow model no longer attempts to write a file called ‘fort.50’ to disc. This makes it possible to calculate winds by simultaneous WEng sessions.
  • The performance and correctness of the grid drawing part is improved.
  • The new-project dialog now defaults to map data in grid format instead of vector format.
  • There is now a link to the WAsP grid maker in the main menu.
  • You can now swap ends of a transect with a single button click

Release C:

  • Release C has an improved solution of the licencing problem. Updating to this release may require re-registration of the WAsP Engineering 3 licence-key file received from DTU-Wind Energy (former Risoe-DTU) .

Release B:

  • Release B solves a licencing problem which appeared recently - maybe in connection with moving the licence server location, we don't know for sure. Updating to release B may require re-registration of the WAsP Engineering 3 licence-key file received from DTU-Wind Energy (former Risoe-DTU) .

Release A:

  • The extreme wind climate treatment revised, but still based on the “Annual Maximum” method. The new revised treatment ensures correct back-predictions and enables obstacles to be included in the analysis of observed extreme wind climates. A new climate representation avoids discretisation in the wind directions data by including both speed and direction in the samples.
  • Improved modelling of site-specific extreme wind based on the new extreme wind climate representation but transformed to the individual sites, resulting in an estimated omnidirectional extreme wind for a return time of e.g. 50 years (50-year wind).
  • Revised extreme wind reporting.
  • Obstacle shelter fully implemented – affecting observed, regional (generalized) and predicted winds.
  • Grid-based calculation of wind fetch over water.
  • All calculated winds and climates saved in the project file.
  • Grid (or raster) format elevation and roughness maps to generate projects; in addition to traditional WAsP vector maps.
  • A vector-grid map conversion utility tool is provided, allowing different methods of gridding to be used.
  • Maps of terrain slope.
  • Spatial data automatically displayed in Google Earth as in WAsP 10.
  • Winds hierarchy re-organised to resemble the WAsP approach more closely. The 'generalised' wind conditions calculated from an observed or geostrophic wind are now explicitly shown and explained.
  • Large domains and long climate calculations no longer limited by the risk of exhausting system memory.
  • WAT more smoothly integrated. Scripts are no longer used to calculate the input data for WAT. (Note that this requires a licensed installation of WAsP 10)
  • New scripts selection window making it easier to understand the available scripts and their selection requirements.
  • Dongle-less licensing system.