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mistake in shape file

C

chrieger

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170
Country
germany
Hi,

again I strugle with these new shape files:mad:
I generate atomaticly all grass strip in Baden-Württemberg. Most of them look perfekty, but I have some big mistakes in a few areas. Look at the picture.
I will get this mistake with FSXKML and with Mr. Orthmanns Exe.
Can soembody think what this mistake can be?

Thanks for help
Christoph
 

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Hi Christoph,

I (and probably others too) are not able from the picture to guess what the mistakes are. What do you have at the outset, which data are you using, which procedures, and what do you want to accomplish?

Is it that you get the wrong size of the airstrips, or what?

Peter
 
Hi Christoph,

As Peter already indicates the question is not that clear indeed. I can see that the picture looks a little weird, but maybe you can tell a little more detailed what you want to accomplish?

You should see the shapefiles only as a dataformat. I use them a lot at work as well, but I think the problems you are seeing here have more to do with the compiler used to make the BGL and how it expects the data to the specified.
 
OK, I will, Sorry!

You can see a few sqares in the Picture with only one Landclass Texture.
Here is what I do:

I made one Airfields with two polies:
1. Runway (4 Points)
2. Airfields Underground (more than 4 Points)

I have a database with all glider airstrips and calculate all airstrips in a program an write all polies in XML file. I already did this into a KML file as well. In Google Earth everything looks fine. But after compilation I have these wrong polies in my bgl file.

Maybe there is a translation mistake by creating the shape files?

How should I draw my polies:

clockwise?

or opposite?

I hope this will help a bit more .
Thanks
Christoph
 
Hi Christoph,
How should I draw my polies: clockwise? or opposite?
Click to expand...

Matters only when you draw polys with holes in them.

But I wonder why you are using shapes at all for the actual runways. I would suggest an xml/kml-file for the airport skirting, tagged appropriately (compiled with shp2vec) and then a normal APX-file for the runways. If you do not like the look of the available textures, you can simply make the width very small.

I have included a small example with the source files. This is a private airstrip on a small Danish island, existing in real, but not as a default in FSX. The APX was basically made with good old AFCAD and then manually adapted (not much adaption) and compiled with the new BGL Compiler. Even if you do not see the several parking spots, the AI aircraft do.

Peter
 

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Hi Peter,

the problem is, that we have several not flattened airstrips in GErman you can not realize withe the runway call. You also have to flatten the poly around the runway! But then the airfield looks not good any more. By using the two polies like this, I also have sloped runways:D

I think I solved the problem a bit. It works better by creating polies clockwise!
 
Hi Christoph,

The most important thing is that it works for you. (I still, however, do not not see why clockwise/anti-clockwise should matter in your case).

In the example I provided the main poly also flattens. If you want, you can make it at an angle (assign indiviual altitudes to the vertices). But the APX-system will still not let you make a sloped runway, I think. So if that is what you want, stick with what you have got.

Peter
 
The shapefile specification says:

"Vertices for a single, ringed polygon are, therefore, always in clockwise order."

so I would probably try to stay with that. In my little testing it seems shp2vec is kind of sensitive about that.

scott s.
.
 
scott967 said:
The shapefile specification says:

"Vertices for a single, ringed polygon are, therefore, always in clockwise order."

so I would probably try to stay with that. In my little testing it seems shp2vec is kind of sensitive about that.

scott s.
.
Click to expand...

Shp2Vec should accept either winding order. The winding of holes MUST, however, be opposite of the containing outer ring.

-Doug
 
Thanks for your comments. Sometime you only try by testing...
I hope I found now a way without producing other mistakes.
 
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