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Water Taxiways

J

Joe W

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unitedstates
I think I may have found a bug. I was trying to make a Seaplane Base with some taxiways and when I put the taxiways in they raised the water about 15 meters. I could find no way to bring them back down other than deleting the taxiways.
I hope I haven't duplicated a post again
Thanks
Joe W.
 
was the airport at the same altitude as the water? it sounds like fsx was adjusting the water elevation to meet the taxiway and airport elevation.
 
All items in the file was at the same elevation,25 meters. All starts, runways, parks, etc.
I removed the taxiways and all was back to normal. This is a small airport in Florida that is all GA. I changed no elevations from the original.
Joe W.
 
Joe W said:
All items in the file was at the same elevation,25 meters. All starts, runways, parks, etc.
I removed the taxiways and all was back to normal. This is a small airport in Florida that is all GA. I changed no elevations from the original.
Joe W.
Click to expand...

Does the airport have both water runways and ground runways? Did you water taxiways cover both water and ground?

Is the water at 25 meters there, or at 0 meters?

Not sure what causes this, just asking some questions that might point us in the right direction.

-Russell
 
Everything is at 25 meters. This is an inland lake and all is on the water, no land.
The elevation with the taxiways is 15 meters higher than it is normally without them.
I wanted to make it compatible at a later date for AI Seaplanes. I still have the parks and runways, just no taxiways or paths..
Joe W.
 
Is this an exsiting airport or one that you are building yourself?

If it is an exsiting airport then what is the Default ARP elevation in the APXnnnnn.bgl file?

Taxiways always seek the root elevation altitude and not what you can change in a XML regardless of who's Utility you use for airport design.
 
It would be a lot easier to tell you what the problem is if we knew what the airport code was that you are working on.

If it is a new airport that you are designing then you need to measure the elevation of the lake water with TcalX and then set that elevation in your new ARP heading.
 
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The airport in question is 9FL3 Lake Josephine in Florida. It's about 7 miles south of Sebring and in reality has 2 aircraft.
AirNav has it as:
Lat/Long 27.3969444/-81.4266667
Elevation: 25.9 meters
Zip is: 33875
Rwys are: 12W/30W
Dimensions: 4600x 500 ft./ 1402x152 meters
Joe W.
 
The default altitude of 9FL3 is 25.91 metres. If you have set your altitude to 25 metres, there will be a conflict, but not 15 metres.

(I'm assuming this is in FSX)

George
 
The specifications above are from AirNav not from FSX and I said so.
FSX/ FSX Planer has the default at 25.908 meters.
Why am I getting the third degree on this? All I said was that when I add the taxiways I get an increase of 15 meters plus or minus, I did measure it because I didn't think it would be this much of a problem. I'm trying to point out that there is a problem with the taxiways. I have set no elevations at this airport.
If this is gonna be all this much of a problem, ...... just forget it.
Joe W.
 
The original intention of this thread was to bring up the fact that Taxiways were causing a problem. I'm no stranger to scenery design and I think I can tell when it's my fault.
The only change I made to this airport was to edit the original and add taxiways and parks (At a dock), I later removed the taxiways because of this problem.
I'm sorry I lost my temper. There is a lot going on here and it's made me a bit touchy.
Joe W.
 
The problem is FSX and not FSXP

FSX has the airport elevation in the APX.bgl set at 85.0 ft. (alt="25.908M"). This is what you are reading but that is not what the elevation of the actual water is.

The actual water is set at 69 feet and 11.0142 inches (21.3109607696533M) which is a difference of 15 ft.

There are many airports in the database of FSX that do not match between the actual ground/water elevation vs the ARP elevation.

When we encounter this problem MS/ACES gave us a simple fix and that is to preload a new ARP set at 21.3109607696533M. Now any taxiway that you add will not raise by 15 ft. but will seek the water elevation as seen at your airport.

If you do not know how to make a preload ARP we will be more then happy to help.
 
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Joe

Copy the following code to notepad and save as a txt file giving it a name such as 9FL3_ARP.txt

<?xml version="1.0" encoding="ISO-8859-1"?>
<FSData version="9.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="bglcomp.xsd">

<Airport ident="9FL3"
lat="27.3969442024827"
lon="-81.4266666769981"
alt="21.3109607696533M"
country="United States"
state="Florida"
city="Sebring"
name="Lake Josephine"
magvar="4"
trafficScalar="1.0"
airportTestRadius="3000.0F" >

</Airport>
</FSData>

Drag the txt file over the correct BGLComp compiler based on which update you are using for FSX (FSX, SP1, SP2)

This will create a 9FL3_ARP.bgl.

Now copy the bgl into the FSX\Scenery\World\scenery folder.

You will now preload a new airport elevation for 9FL3 with all the correct information in the "Go To" menu and taxiways will seek the water elevation of your scenery and not the old ARP elevation.
 
How can I tell what the water or ground is supposed to be? I have another airport that I'm having problem with but it is on solid ground. the Taxiways and runways are somewhat buried under the airport background. I made an arp file for that too and set it at what I thought it should be and it turned out great now. No more buried taxiways and runways.
Thanks
Joe W.
 
Joe

There is a small Utility here on the forums by rhumbaflappy called TcalcX that reads the true ground/water elevation based on where your airplane in sitting.

The elevation that TcalcX reads should agree with what FSX has in the airport header but as you have found out with 9FL3 that is not always true.

TcalcX is for FSX. There is also one for FS9 I believe on AVSIM called Tcalc

Download the zip for FSX at the bottom of the following link

http://www.fsdeveloper.com/forum/showthread.php?t=4273
 
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