/
islh_geom.py
158 lines (122 loc) · 4.25 KB
/
islh_geom.py
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from qgis.core import QgsVectorLayer, QgsFeature, QgsField, QgsGeometry
from PyQt5.QtCore import QVariant
def createLayer(data, lname='default', extra_attrs=[]):
feature = data[0]
geomtag = {
'PSK':'PSK_OBRAZ'
, 'BZL':'BZL_OBRAZ'
, 'JP':'JP_OBRAZ'
, 'OP':'OP_OBRAZ'
, 'KLO':'LIN_OBRAZ'
, 'KTO':'TXT_OBRAZ'
, 'KBO':'BOD_OBRAZ'
, 'KPO':'PLO_OBRAZ'
}[feature.tag]
geomtype = {
'L':'Linestring'
, 'P':'Polygon'
, 'B':'Point'
, 'MB':'MultiPoint'
, 'ML':'Multilinestring'
, 'MP':'MultiPolygon'
}[list(feature.find(geomtag))[0].tag]
layer = QgsVectorLayer(geomtype + '?crs=EPSG:5514', lname, 'memory')
attnames = feature.keys()
attnames = attnames + extra_attrs
pr = layer.dataProvider()
pr.addAttributes(
[QgsField(a, QVariant.String) for a in attnames])
layer.updateFields()
#populateLayer(layer, data)
return(layer)
def populateLayer(layer, data, extra_attrs={}, pbar = None):
""":param extra_attrs: dict s extra atributama"""
#jeste sem prijde progresbarr a extra attrs v dict
if pbar is not None:
featureCount = len(data)
pbar.setRange(0, featureCount)
progres = iter(range(0, featureCount + 1))
pbar.setValue(next(progres))
feature_list = []
pr = layer.dataProvider()
attnames = [f.name() for f in layer.fields()\
if f.name() not in extra_attrs.keys()]
geomtag = {
'PSK':'PSK_OBRAZ'
, 'BZL':'BZL_OBRAZ'
, 'JP':'JP_OBRAZ'
, 'OP':'OP_OBRAZ'
, 'KLO':'LIN_OBRAZ'
, 'KTO':'TXT_OBRAZ'
, 'KBO':'BOD_OBRAZ'
, 'KPO':'PLO_OBRAZ'
}[data[0].tag]
for item in data:
feature = QgsFeature()
feature.setGeometry(islhToQgs(item.find(geomtag)))
feature.setAttributes(
[item.get(a) for a in attnames] +\
[extra_attrs[a] for a in\
[x.name() for x in layer.fields()] \
if a in extra_attrs.keys()]
)
feature_list.append(feature)
if pbar is not None: pbar.setValue(next(progres))
pr.addFeatures(feature_list)
#def islhToOgr(islh_obraz):
# return(
# ogr.CreateGeometryFromWkt(
# islhToWkt(lin_obraz)
# )
# )
def islhToQgs(islh_obraz):
return(
QgsGeometry.fromWkt(
islhToWkt(islh_obraz)
)
)
##pridat dalsi typy
def islhToWkt(islh_obraz):
obraz = list(islh_obraz)[0]
if obraz.tag == 'B':
return(
'POINT (' + islh_point(obraz) + ')'
)
elif obraz.tag == 'ML':
return(
'MULTILINESTRING ' + islh_multiline(obraz)
)
elif obraz.tag == 'L':
return(
'LINESTRING ' + islh_line(obraz)
)
elif obraz.tag == 'MP':
return(
'MULTIPOLYGON ' + islh_multipolygon(obraz)
)
elif obraz.tag == 'P':
return(
'POLYGON ' + islh_polygon(obraz)
)
elif obraz.tag == 'MB':
return(
'MULTIPOINT ' + islh_multipoint(obraz)
)
def islh_multiline(ml):
return('(' + ','.join([
islh_line(l) for l in list(ml)]) + ')')
def islh_line(l):
return('(' + ','.join([
islh_point(p) for p in list(l)]) + ')' )
def islh_point(p):
(y, x) = [ -1 * float(i) for i in p.get('S').split('$')]
return( ' '.join((str(x), str(y))))
def islh_multipoint(mb):
return('(' + ','.join([
'(' + islh_point(p) + ')' for p in list(mb)]) + ')')
def islh_multipolygon(mp):
return( '(' + ','.join([
islh_polygon(p) for p in list(mp)]) + ')')
def islh_polygon(p):
return( '(' + ','.join([
islh_line(r) for r in list(p)]) + ')')