/
gama_interface.py
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/
gama_interface.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
.. module:: gama_interface
:platform: Linux, Windows
:synopsis: interface modul to GNU Gama
.. moduleauthor::Zoltan Siki <siki@agt.bme.hu>
"""
# surveying calculation modules
import config
from base_classes import *
from surveying_util import *
from PyQt4.QtCore import QDir, QFile, QFileInfo, QIODevice, QTemporaryFile, \
QProcess, QSettings
from PyQt4.QtXml import QDomDocument, QXmlSimpleReader, QXmlInputSource
class GamaInterface(object):
""" Interface class to GNU Gama
"""
def __init__(self, dimension=2, probability=0.95, stdev_angle=3, stdev_dist=3, stdev_dist1=3):
""" Initialize a new GamaInterface instance.
:param dimension: dimension of network (int), 1/2/3
:param probability: porbability for statistical tests (float)
:param stdev_angle: standard deviation for directions in cc (float)
:param stdev_dist: base standard deviation for distances mm (float)
:param stdev_dist1: standard deviation for distances mm/km (float)
"""
self.dimension = dimension
self.probability = probability
self.stdev_angle = stdev_angle
self.stdev_dist = stdev_dist
self.stdev_dist1 = stdev_dist1
self.points = []
self.observations = []
gama_path = QSettings().value("SurveyingCalculation/gama_path",config.gama_path)
if QFileInfo(gama_path).exists():
gama_prog = gama_path
else:
# get operating system dependent file name of gama_local
plugin_dir = QDir().cleanPath( QFileInfo(__file__).absolutePath() )
gama_prog = QDir(plugin_dir).absoluteFilePath("gama-local")
if not QFileInfo(gama_prog).exists():
if QFileInfo(gama_prog+".exe").exists():
gama_prog += '.exe'
elif QFileInfo(gama_prog+"64.exe").exists():
gama_prog += '64.exe'
else:
gama_prog = None
self.gama_prog = gama_prog
def add_point(self, point, state='ADJ'):
""" Add point to adjustment
:param point: point to ad network (Point)
:param state: FIX or ADJ (str)
"""
for p, s in self.points:
# avoid duplicated points
if p.id == point.id:
return
self.points.append([point, state])
def add_observation(self, obs):
""" Add observation to adjustment
:param obs: observation to add (PolarObservation)
"""
self.observations.append(obs)
def remove_last_observation(self, st=False):
""" remove last observation or station data
:param st: False remove single observation, True remove station (Bool)
"""
if len(self.observations):
if st:
o = self.observations.pop()
while len(self.observations) and o.station is None:
o = self.observations.pop()
else:
self.observations.pop()
def adjust(self):
""" Export data to GNU Gama xml, adjust the network and read result
:returns: result list of adjusment from GNU Gama
"""
# fix = 0 free network
fix = 0
adj = 0
for p, s in self.points:
if s == 'FIX':
fix += 1
else:
adj += 1
if adj == 0 or len(self.observations) == 0:
# no unknowns or observations
return None
doc = QDomDocument()
doc.appendChild(doc.createComment('Gama XML created by Land Surveying plugin for QGIS'))
gama_local = doc.createElement('gama-local')
gama_local.setAttribute('version', '2.0')
doc.appendChild(gama_local)
network = doc.createElement('network')
network.setAttribute('axes-xy', 'ne')
network.setAttribute('angles', 'left-handed')
gama_local.appendChild(network)
description = doc.createElement('description')
if self.dimension == 1:
description.appendChild(doc.createTextNode('GNU Gama 1D network'))
elif self.dimension == 2:
description.appendChild(doc.createTextNode('GNU Gama 2D network'))
elif self.dimension == 3:
description.appendChild(doc.createTextNode('GNU Gama 3D network'))
network.appendChild(description)
parameters = doc.createElement('parameters')
parameters.setAttribute('sigma-apr', '1')
parameters.setAttribute('conf-pr', str(self.probability))
parameters.setAttribute('tol-abs', '1000')
parameters.setAttribute('sigma-act', 'aposteriori')
parameters.setAttribute('update-constrained-coordinates', 'yes')
network.appendChild(parameters)
points_observations = doc.createElement('points-observations')
points_observations.setAttribute('distance-stdev', str(self.stdev_dist) + ' ' + str(self.stdev_dist1))
points_observations.setAttribute('direction-stdev', str(self.stdev_angle))
points_observations.setAttribute('angle-stdev', str(math.sqrt(self.stdev_angle * 2)))
points_observations.setAttribute('zenith-angle-stdev', str(self.stdev_angle))
network.appendChild(points_observations)
for p, s in self.points:
if self.dimension == 1:
tmp = doc.createElement('point')
tmp.setAttribute('id', p.id)
if p.z is not None:
tmp.setAttribute('z', str(p.z))
if s == 'FIX':
tmp.setAttribute('fix', 'z')
else:
if fix == 0:
tmp.setAttribute('adj', 'Z')
else:
tmp.setAttribute('adj', 'z')
points_observations.appendChild(tmp)
elif self.dimension == 2:
tmp = doc.createElement('point')
tmp.setAttribute('id', p.id)
if p.e is not None and p.n is not None:
tmp.setAttribute('y', str(p.e))
tmp.setAttribute('x', str(p.n))
if s == 'FIX':
tmp.setAttribute('fix', 'xy')
else:
if fix == 0:
# free network
tmp.setAttribute('adj', 'XY')
else:
tmp.setAttribute('adj', 'xy')
points_observations.appendChild(tmp)
elif self.dimension == 3:
tmp = doc.createElement('point')
tmp.setAttribute('id', p.id)
if p.e is not None and p.n is not None:
tmp.setAttribute('y', str(p.e))
tmp.setAttribute('x', str(p.n))
if p.z is not None:
tmp.setAttribute('z', str(p.z))
if s == 'FIX':
tmp.setAttribute('fix', 'xyz')
else:
if fix == 0:
tmp.setAttribute('adj', 'XYZ')
else:
tmp.setAttribute('adj', 'xyz')
points_observations.appendChild(tmp)
for o in self.observations:
if o.station == 'station':
# station record
sta = doc.createElement('obs')
sta.setAttribute('from', o.point_id)
if o.th is None:
ih = 0
else:
ih = o.th
points_observations.appendChild(sta)
else:
# observation
if self.dimension == 2:
# horizontal network
if o.hz is not None:
tmp = doc.createElement('direction')
tmp.setAttribute('to', o.point_id)
tmp.setAttribute('val', str(o.hz.get_angle('GON')))
sta.appendChild(tmp)
if o.d is not None:
# horizontal distance
hd = o.horiz_dist()
if hd is not None:
tmp = doc.createElement('distance')
tmp.setAttribute('to', o.point_id)
tmp.setAttribute('val', str(hd))
sta.appendChild(tmp)
elif self.dimension == 1:
# elevations only
pass
elif self.dimension == 3:
# 3d
if o.th is None:
th = o.th
else:
th = 0
if o.hz is not None:
tmp = doc.createElement('direction')
tmp.setAttribute('to', o.point_id)
tmp.setAttribute('val', str(o.hz.get_angle('GON')))
sta.appendChild(tmp)
if o.d is not None:
if o.d.mode == 'SD':
tmp = doc.createElement('s-distance')
tmp.setAttribute('val', str(o.d.d))
tmp.setAttribute('from_dh', str(ih))
tmp.setAttribute('to_dh', str(th))
else:
tmp = doc.createElement('distance')
tmp.setAttribute('val', str(o.d.d))
tmp.setAttribute('to', o.point_id)
sta.appendChild(tmp)
if o.v is not None:
tmp = doc.createElement('z-angle')
tmp.setAttribute('to', o.point_id)
tmp.setAttribute('val', str(o.v.get_angle('GON')))
tmp.setAttribute('from_dh', str(ih))
tmp.setAttribute('to_dh', str(th))
sta.appendChild(tmp)
else:
# unknown dimension
return None
#print doc.toprettyxml(indent=" ")
# generate temp file name
tmpf = QTemporaryFile( QDir.temp().absoluteFilePath('w') )
tmpf.open(QIODevice.WriteOnly)
tmpf.close()
tmp_name = tmpf.fileName()
f = QFile(tmp_name + '.xml')
if f.open(QIODevice.WriteOnly):
f.write(doc.toByteArray())
f.close()
# run gama-local
if self.gama_prog is None:
return None
# status = call([str(self.gama_prog), str(tmp_name) + '.xml', '--text',
# str(tmp_name) + '.txt', '--xml', str(tmp_name) + 'out.xml'])
status = QProcess.execute(self.gama_prog, [ tmp_name+'.xml', '--text',
tmp_name+'.txt', '--xml', tmp_name+'out.xml'])
if status != 0:
return None
xmlParser = QXmlSimpleReader()
xmlFile = QFile(tmp_name + 'out.xml')
xmlInputSource = QXmlInputSource(xmlFile)
doc.setContent(xmlInputSource,xmlParser)
f_txt = QFile(tmp_name + '.txt')
f_txt.open(QIODevice.ReadOnly)
res = f_txt.readAll().data()
f_txt.close()
# store coordinates
adj_nodes = doc.elementsByTagName('adjusted')
if adj_nodes.count() < 1:
return res
adj_node = adj_nodes.at(0)
for i in range(len(adj_node.childNodes())):
pp = adj_node.childNodes().at(i)
if pp.nodeName() == 'point':
for ii in range(len(pp.childNodes())):
ppp = pp.childNodes().at(ii)
if ppp.nodeName() == 'id':
p = Point(ppp.firstChild().nodeValue())
elif ppp.nodeName() == 'Y' or ppp.nodeName() == 'y':
p.e = float(ppp.firstChild().nodeValue())
elif ppp.nodeName() == 'X' or ppp.nodeName() == 'x':
p.n = float(ppp.firstChild().nodeValue())
elif ppp.nodeName() == 'Z' or ppp.nodeName() == 'z':
p.z = float(ppp.firstChild().nodeValue())
ScPoint(p).store_coord(self.dimension)
# remove input xml and output xml
tmpf.remove()
f_txt.remove()
f.remove()
xmlFile.remove()
return res
if __name__ == "__main__":
"""
unit test
"""
gi = GamaInterface()
gi.add_point(Point('1', 0, 0))
gi.add_point(Point('2', 211.70, 0))
gi.add_point(Point('3', 257.95, 375.64))
gi.add_point(Point('4', 78.1562, 395.49))
gi.add_point(Point('5', -60.35, 387.99))
gi.add_observation(PolarObservation('1', 'station'))
gi.add_observation(PolarObservation('2', None, Angle('42-56-02', 'DMS'),
Angle('87-35-39', 'DMS'), Distance(211.886, 'SD')))
gi.add_observation(PolarObservation('3', None, Angle('347-24-35', 'DMS'),
Angle('88-54-24', 'DMS'), Distance(455.774, 'SD')))
gi.add_observation(PolarObservation('4', None, Angle('324-06-32', 'DMS'),
Angle('90-00-36', 'DMS'), Distance(403.150, 'SD')))
gi.add_observation(PolarObservation('5', None, Angle('304-05-19', 'DMS'),
Angle('89-58-23', 'DMS'), Distance(392.665, 'SD')))
gi.add_observation(PolarObservation('2', 'station'))
gi.add_observation(PolarObservation('1', None, Angle('304-20-43', 'DMS'),
Angle('92-27-19', 'DMS'), Distance(211.894, 'SD')))
gi.add_observation(PolarObservation('5', None, Angle('359-18-19', 'DMS'),
Angle('91-03-52', 'DMS'), Distance(473.977, 'SD')))
gi.add_observation(PolarObservation('4', None, Angle('15-41-16', 'DMS'),
Angle('91-14-36', 'DMS'), Distance(417.565, 'SD')))
gi.add_observation(PolarObservation('3', None, Angle('41-22-11', 'DMS'),
Angle('90-02-29', 'DMS'), Distance(378.506, 'SD')))
gi.add_observation(PolarObservation('5', 'station'))
gi.add_observation(PolarObservation('4', None, Angle('324-16-52', 'DMS'),
Angle('90-06-46', 'DMS'), Distance(138.703, 'SD')))
gi.add_observation(PolarObservation('3', None, Angle('329-36-15', 'DMS'),
Angle('88-27-29', 'DMS'), Distance(318.672, 'SD')))
gi.add_observation(PolarObservation('2', None, Angle('22-20-43', 'DMS'),
Angle('88-55-56', 'DMS'), Distance(473.959, 'SD')))
gi.add_observation(PolarObservation('1', None, Angle('48-32-26', 'DMS'),
Angle('90-01-16', 'DMS'), Distance(392.662, 'SD')))
gi.add_observation(PolarObservation('4', 'station'))
gi.add_observation(PolarObservation('2', None, Angle('346-38-25', 'DMS'),
Angle('88-45-44', 'DMS'), Distance(417.543, 'SD')))
gi.add_observation(PolarObservation('1', None, Angle('16-28-34', 'DMS'),
Angle('89-59-40', 'DMS'), Distance(403.146, 'SD')))
gi.add_observation(PolarObservation('5', None, Angle('92-11-53', 'DMS'),
Angle('89-57-38', 'DMS'), Distance(138.704, 'SD')))
gi.add_observation(PolarObservation('3', 'station'))
gi.add_observation(PolarObservation('5', None, Angle('59-45-52', 'DMS'),
Angle('91-33-41', 'DMS'), Distance(318.673, 'SD')))
gi.add_observation(PolarObservation('1', None, Angle('2-01-09', 'DMS'),
Angle('91-05-51', 'DMS'), Distance(455.772, 'SD')))
gi.add_observation(PolarObservation('2', None, Angle('334-33-23', 'DMS'),
Angle('89-57-40', 'DMS'), Distance(378.487, 'SD')))
gi.adjust()