Hello I made an obstacle file using shptoobs tool. For some reason the tool wouldnt work for adding trees, no matter how carefully i follow the instructions. Therefore, I add the building obstacle file and add the trees manually. The output from this is strange though, with a negative elevation and thus error output of 9999.0 in the key output columns. It seems to work OK with my file without trees though. I do not have a topological layer because I also spent many hours tearing my hair out trying to get that to work with no success, but my terrain is all flat anyway.
Any idea why the output gives negative elevation?
Also, a bug with the tool - it cant seem to decide whether it prefers , or . for decimal point and keeps telling me to change them all, and also I cannot change the albedo value, it just reverts to 0.3 when i click anywhere else.
ok, one after the other: What did you do exactly? And what was the result? What version are you on? What input Layers did you use? What fields did you select??
Hi there Im using version 3.1 I am studying Bolzano (Italien) which I have entered correct data for . I am using an obstacle file which I created for buildings only in shptoobs tool and then added trees manually using Rayman and saved as a new obstacle file. I selected all the right fields, consulting the manual frequently.
My weather data file has Date, Time, Altitude, Air Temp, Rel humidity, Wind velocity and Global radiation. here is a sample of a few lines.
What I can see from the output you posted is that you're getting a bad sun position. Does this happen if you use the edited obstacle file, the original obstacle file, or also without any obstacle file?
In case this only happens if the edited obstacle file is used, could you please post the obstacle file's content (it's a plain text file) here in the forum so I can check?
Please also check your location settings. Is there any strange characters in the location? Maybe consider also posting the location here.
Please also open another thread to work on your issues with the shp to obs plugin describing your input, what fields you selected (what type?) and what did / did not work.
Hello So I tried it using a location without trees for simplicity. I tried it twice with and without obstacle file . Without the obstacle file it seems to work and gives me very high Tmrt. With the obstacle file I get the negative elevation and error numbers again. I cant post the entire obstacle file because it is ove 800 lines long. The shptoobs tool made it as many many polygons - maybe i should just create a building obstacle file myself. Here are the first few lines of the file:
What do you mean by strange characters in the location? I just entered Bolzano as a new city and input the lat long and altitude and timezone. However I have noticed that other locations in the drop down list all have 0 altitude. Should I put 0 altitude also for Bolzano?
the first lines of the .obs do look good to me, considering you are using RayMan Pro. If you are using RayMan 1.2, please delete the last two columns (albedo and emission coefficient, that appear to be unused in your case anyway).
In general, RayMan is limited to a model domain of 400m². Every obstacle exceeding -200 to +200 will be truncated. Maybe you could first select the buildings you really need and create an .obs file out of those (please open a new thread for issues with the obs converter plugin arising from that)?
You could also check if the obstacles are displayed correctly in the editor (Input --> Obstacles). If they are fine there, there is nothing wrong with the obstacles file and the issue is caused by something else.
The height is the elevation of the location in (full!) meters. Some of the generic locations are lacking height information leading to a height of 0, but this is not what you want. However, please make sure your height does not contain any decimals. Could you post the new line in the locations.lst here in the forum so I can take a look at it?
By high Tmrt I mean Tmrt of 50 - 60 degrees celcius for the peak part of the day when the air temperature was around 30 degrees. The Tmrt that I recorded on this day with a globe thermometer was only around 40 degrees on average for this location. Is it common for rayman to overestimate the Tmrt?
no, but I suspect the high Tmrt is the result of your input setting for global radiation, which appears to be rather high (like 900 W/m² according to your first post).
RayMan (astronomically) calculates a max. of approximately 720 W/m² for that date and location?
Hello After a break on other work I have come back to Rayman and sorry to say im still having the same problems. It worked very briefly but without any obstacle file. And one of my locations has a lot of trees which I need to model. As soon as I introduced an obstacle file, the output fails every time, even when i try again without obstacle file after a total software restart. Im using 3.1 beta. It seems there is a problem with elevation and azimuth.
I couldnt attach file. Below is the text as seen with a text editor. Its a very simple one. The problem seems to arise from the sun location calculation, which sticks at one value when I add the obstacle file.
Thank you for your obstacle file. According to your input files, RayMan has a bug to read your global radiation from the input file.
If I define the input file directly after the start up of RayMan and also the obstacle file, I'm able to calculate the thermal indizes once. If I press the "New" Button a second time, RayMan is failing to read the global radiation from the file.
The result of your input is attached in the bolzano.txt file.
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I have decided to calculate my own Mean radiant temperature from my globe thermometer measurements and use that instead of global radiation. This method also avoids problems I was having with the obstacle file because I dont need them anymore.
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15.02.2019 16:43
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bolzano.txt