hi,
I saw the app approximate by defect and not to near integer the second of degree.
This results in errors of 31 meters of airspaces.
For example Alzate Brianza Acro

`official ENR5-2-2 data by enav.it are:

Alzate Brianza Acro AD
AH 4000FT AMSL
AL 2000FT AMSL
45:46:54 N 009:08:55 E
45:46:36 N 009:10:06 E
45:45:46 N 009:09:32 E
45:46:06 N 009:08:26 E
45:46:54 N 009:08:55 E

OpenAirSpace raw .aip XML data are:

45.7816666667 9.1486111111 #45° 46' 54“ 9° 8' 55
45.7766666667 9.1683333333 #45° 46' 36“ 9° 10' 6
45.7627777778 9.1588888889 #45° 45' 46“ 9° 9' 32
45.7683333333 9.1405555556 #45° 46' 6“ 9° 8' 26
45.7816666667 9.1486111111 #45° 46' 54“ 9° 8' 55
that are exactly equivalent to ENR enav.it official values

but airspace-converter results:

AC R
AN Alzate Brianza(Acro)
AH 4000F MSL
AL 2000F MSL
DP 45:46:54 N 009:08:54 E
DP 45:46:36 N 009:10:05 E
DP 45:45:46 N 009:09:32 E
DP 45:46:05 N 009:08:26 E
DP 45:46:54 N 009:08:54 E
`
As you can see, there are some one unit of degree's seconds difference, about 31 meters.

The formula to calculate the degree's seconds require ROUND(x,0) and not INT(x) function.
INT() is OK for degree and degree's prime

Valerio

files:
includes/airspace.php includes/geolocation.php
must be renamed to:
includes/Airspace.php includes/GeoLocation.php
to let run the script on all platforms

Several airspace files contain airspaces that are either defined as a simple line (two points) or an invalid polygon with three points where the last point is the same as the first one. The airspace converter should only accept valid geometries and generated airspace polygons that have at least have 4 vertexes.
If an invalid geometry is detected, notify the user and ignore the geometry so the user can take action.

Hi,
I have downloaded the current airspace and wanted to convert it for qGIS

$ php aip2openair.php aip_in/openaip_airspace_germany_de.aip
Processing openaip_airspace_germany_de.aip..
No airspace definitions found in file. If file contains airspace definitions, this may also be a problem with wrong text encoding. Please save as UTF-8 and try again.
LOAD FAILED
Finished

I read the RAEADME.md but did not debug so far. My current OS is Windows7 with cygwin php 7.3.7 (with not all modules) installed. The input file was downloaded today.