Thank you pascal you were exactly correct.
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If you don't delete the file next time the program will append a new polygon to the existing ones. The file is then processed by the BLN2SHP to generate the shapefiles. This program from Jim will generate the shape files for:
For example to move an airport it's necessary to generate two bln one for exclude and one for flatten. For José Maia's LPPM
To produce the shapefile
BLN2SHP.exe LPPM_EX.bln EX
BLN2SHP.exe LPVL_FL.bln FL
then use the shp2vec with -ADDTOCELLS In this case the output is 0502.bgl since it is in Portugal
I did the new poly with Ground2k4, placed the grass poly at layer 7. This is for the exclude
I then did an LWM mask, and made it a flatten at the altitude I want.
I discovered, however, that the flat isn't entirely flat, there's a 0.1, 0.2 feet diference within the airport. Maybe the round earth problem.
It seems the tool you are using to generate the Shapefiles might only produce one flavor of polygon at a time. Be aware that by using the GUIDs provided below one polygon can have multiple attributes. A person could modify the DBF portion of the shapefile. Perhaps forwarding this information to the tool author might allow them to natively support.
5a7f944c-3d79-4e0c-82f5-04844e5dc653 Flatten + MaskClassMap
46bfb3bd-ce68-418e-8112-feba17428ace Flatten + MaskClassMap + ExcludeAG
18580a63-fc8f-4a02-a622-8a1e073e627b Flatten + ExcludeAG
594e70c8-06a5-4e3f-be6e-4dbf50b49d11 MaskClassMap + ExcludeAG
I have the source for the program and it uses the "Flatten + MaskClassMap + ExcludeAG" GUID. I also have only a single polygon per file.
I'm afraid there are further problems. The FSX default and coastlines are not particularly accurate. At Cardiff, Wales, I have created a more sensible flatten but the default extends beyond the coastline and is not overridden by mine. The only solution I can see is to inhibit 0501 base.
Ahh, thanks for that Doug. Presumably the polygon height doesn't affect the exclusion so I can just enclose the default AB at height zero?
Hi guys and gals (are there any?),
I don't know if eveybody knows this, if not great, if the do sorry for double-posting.
The only way I managed to flatten the FSX ground was using an LWM flatten in Ground2k. I don't know about SBuild as I do not have it.
Also the only way I managed to exclude the autogen was creating a new VTP2 Poly.
I don't know if it's the only way, if not please post other ways to do this task as I'm sure interested in learning all ins and outs of the FSX engine.