ABOUT Wind Atlas (2008-07-12)

[Old Forum Archivist]

Hello,

I would like to prepare Wind Atlas for one licalisation. I have already prepared a vector map and Observed wind climate (made by other person), so I'm following these steps:

1. file --> New workspace,

2. a right mouse's button and insert new --> wind atlas,

and there is a problem here: "calculation constraint; there is no observed wind climate associate with the wind atlas", and "the met. station should be located in a map, but it is not", hmm...

I know what to do next, but I'm not sure how to get rid off that problem.

Thank U in advance for Your help.


--------

I would suggest that you run through the step-by-step exercise in the Quick start tutorial section of the help file. It's really very quick. Otherwise, you could open the sample Waspdale workspace and see how the hierarchy is arranged in order to calculate a wind atlas.

--------

I was repeating the step-by-step example of the tutorial.and I found a cramped detail in the waspdale airport obstacle group map.I noticed that the 8th obstacle's bearings of the 2 corners are 304.9276 and 305,and the depth is 147,which are totally different from the 6th and the 7th.

I want to know whether the data input in this way will influence the result of the wind assessment or not.Thank you!

--------

Helo Xiaolan Lee,



I don't recognise the numbers you reported there. I expect that there is a problem. I'll email you directly to ask more about this.



Here is the correct list of values for Airport.obs



Obstacle ID angle 1 [°] radius 1 [m] angle 2 [°] radius 2 [m] height [m] depth [m] porosity

1 11 134 26 120 6 30 0,00

2 26 120 43 110 6 60 0,00

3 112 500 146 74 5 16 0,40

4 200 -0 -48 76 4 26 0,00

5 215 154 237 144 6 46 0,00

6 278 116 352 150 6 6 0,70

7 295 150 345 196 6 6 0,70

8 305 196 341 250 6 6 0,70



Duncan.

--------


But I downloaded the demo this morning.

I have replied your letter several minutes ago,and I attached the requisite files also.

Good luck.

--------


There is an anomaly in the airport.obs data set, where the first visible face of the eighth obstacle is actually the very short one at the end of the line, rather than the long one which seems to be facing the origin of the group. So the strange numbers you see are a correct way of expressing the same information.



When the obstacle is translated to cartesian coordinates for the shelter model, the same obstacle is represented, and the results are the same.