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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# airspace checker
# Copyright (C) 2010 Marc Poulhiès
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import osgeo.ogr
import osgeo.osr
import os
import os.path
import sys
import airspace.parser
import airspace.util
import airspace.track
p = airspace.parser.OAIRParser(sys.argv[1])
print "Parsing..."
p.parse()
print "[OK] %d zones" %len(p.zones)
track = airspace.track.loadSimpleTxt('toto.txt')
print track.GetPointCount()
found_an_intersection = 0
intersected_segs = []
print "Track bbox: ", track.GetEnvelope()
zones_to_check = p.zones.intersection(track.GetEnvelope())
print "Potential crossed zones:", len(zones_to_check)
for zone in zones_to_check:
##for zone in p.zones.list:
poly = zone.finish()
if poly.Intersect(track):
found_an_intersection += 1
print "Intersection with", zone.name
intersected_segs.append((airspace.util.getSubLineStringInZone(track,poly), zone))
if found_an_intersection > 0:
print "Found %d potential intersections." % found_an_intersection
true_positive_inters = {}
false_positive_inters = {}
print intersected_segs
for subtracks,interzone in intersected_segs:
confirmed = False
for subtrack in subtracks:
for pt_idx in xrange(subtrack.GetPointCount()):
lon,lat,alt = subtrack.GetPoint(pt_idx)
ceil_alt = interzone.getCeilAtPoint(lat,lon)
floor_alt = interzone.getFloorAtPoint(lat,lon)
if alt > floor_alt and alt < ceil_alt:
confirmed = True
print "%f/%f@%f in zone '%s' (%f< %f < %f)" % (lat,lon,alt,
interzone.name,
floor_alt, alt, ceil_alt)
if confirmed:
if interzone in true_positive_inters:
true_positive_inters[interzone].append(subtrack)
else:
d = [subtrack]
true_positive_inters[interzone] = d
else:
if interzone in false_positive_inters:
false_positive_inters[interzone].append(subtrack)
else:
d = [subtrack]
false_positive_inters[interzone] = d
print "confirmed inter: %d" % len(true_positive_inters)
print "false positive inter: %d" % len(false_positive_inters)
for zone,tracks in true_positive_inters.items():
print "inter with :", zone.name
else:
print "No intersection found."
##airspace.util.writeGeometriesToShapeFile(intersected_segs, "test.shp")