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##Lines=group | ||
##lines=vector | ||
##distance=number 1 | ||
##startpoint=number 0 | ||
##endpoint=number 0 | ||
##output=output vector | ||
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from qgis.core import * | ||
from PyQt4.QtCore import * | ||
from processing.core.VectorWriter import VectorWriter | ||
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def create_points(feat): | ||
geom = feat.geometry() | ||
length = geom.length() | ||
currentdistance = 0 | ||
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if endpoint > 0: | ||
length = endpoint | ||
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out = QgsFeature() | ||
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while startpoint + currentdistance <= length: | ||
point = geom.interpolate(startpoint + currentdistance) | ||
currentdistance = currentdistance + distance | ||
out.setGeometry(point) | ||
attrs = feat.attributes() | ||
attrs.append(currentdistance) | ||
out.setAttributes(attrs) | ||
writer.addFeature(out) | ||
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layer = processing.getObject(lines) | ||
fields = layer.dataProvider().fields() | ||
fields.append(QgsField('Distance', QVariant.Double)) | ||
writer = VectorWriter(output, None, fields, QGis.WKBPoint, | ||
layer.crs()) | ||
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feats = processing.features(layer) | ||
nFeat = len(feats) | ||
for i, feat in enumerate(feats): | ||
progress.setPercentage(int(100 * i / nFeat)) | ||
create_points(feat) | ||
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del writer | ||
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##Vector geometry tools=group | ||
##Polygons=vector | ||
##Max_area=number 100000 | ||
##Results=output vector | ||
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from qgis.core import * | ||
from PyQt4.QtCore import * | ||
from processing.core.VectorWriter import VectorWriter | ||
from shapely.geometry import Polygon, MultiPolygon | ||
from shapely.wkb import loads | ||
from shapely.wkt import dumps | ||
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polyLayer = processing.getObject(Polygons) | ||
polyPrder = polyLayer.dataProvider() | ||
n = polyLayer.featureCount() | ||
l = 0 | ||
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writer = VectorWriter(Results, None, polyPrder.fields(), | ||
QGis.WKBMultiPolygon, polyPrder.crs()) | ||
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resgeom = QgsGeometry() | ||
resfeat = QgsFeature() | ||
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for feat in processing.features(polyLayer): | ||
progress.setPercentage(int(100*l/n)) | ||
l+=1 | ||
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g = loads(feat.geometry().asWkb()) | ||
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if g.geom_type == 'MultiPolygon': | ||
resg = [Polygon(p.exterior, | ||
[r for r in p.interiors if Polygon(r).area > Max_area]) for p in g] | ||
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else: | ||
resg = [Polygon(g.exterior, | ||
[r for r in g.interiors if Polygon(r).area > Max_area])] | ||
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resgeom = QgsGeometry().fromWkt(dumps(MultiPolygon(resg))) | ||
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resfeat.setAttributes(feat.attributes()) | ||
resfeat.setGeometry(resgeom) | ||
writer.addFeature(resfeat) | ||
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del writer |
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{"ALG_CREATOR": "Chourmo - v1", "ALG_DESC": "Delete all holes (or \"rings\") in polygons or multipolygons over an area limit", "ALG_HELP_CREATOR": "Chourmo - v1", "Area": "Maximum area for holes in result"} |
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##Vector table tools=group | ||
##Input=vector | ||
##Fields=string | ||
##Output=output table | ||
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from qgis.core import * | ||
from PyQt4.QtCore import * | ||
from processing.core.TableWriter import TableWriter | ||
from collections import defaultdict | ||
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layer = processing.getObject(input) | ||
inputFields = layer.pendingFields() | ||
fieldIdxs = [] | ||
fields = fields.split(',') | ||
for f in fields: | ||
idx = inputFields.indexFromName(f) | ||
if idx == -1: | ||
raise GeoAlgorithmExecutionException('Field not found:' + f) | ||
fieldIdxs.append(idx) | ||
writer = TableWriter(output, None, fields + ['FREQ']) | ||
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counts = {} | ||
feats = processing.features(layer) | ||
nFeats = len(feats) | ||
counts = defaultdict(int) | ||
for i, feat in enumerate(feats): | ||
progress.setPercentage(int(100 * i / nFeats)) | ||
attrs = feat.attributes() | ||
clazz = tuple([attrs[idx] for idx in fieldIdxs]) | ||
print clazz | ||
counts[clazz] += 1 | ||
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for c in counts: | ||
writer.addRecord(list(c) + [counts[c]]) | ||
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##Vector geometry tools=group | ||
##Polygons=vector polygon | ||
##To_keep=number 1 | ||
##Results=output vector | ||
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from qgis.core import * | ||
from PyQt4.QtCore import * | ||
from processing.core.VectorWriter import VectorWriter | ||
from operator import itemgetter | ||
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To_keep = int(To_keep) | ||
if To_keep < 1: | ||
progress.setInfo("'To keep' value has been modified to be at least 1.") | ||
To_keep = 1 | ||
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polyLayer = processing.getObject(Polygons) | ||
polyPrder = polyLayer.dataProvider() | ||
count = polyLayer.featureCount() | ||
writer = VectorWriter(Results, None, polyPrder.fields(), | ||
QGis.WKBMultiPolygon, polyPrder.crs()) | ||
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for n, feat in enumerate(processing.features(polyLayer)): | ||
progress.setPercentage(int(100*n/count)) | ||
geom = feat.geometry() | ||
if geom.isMultipart(): | ||
featres = feat | ||
geoms = geom.asGeometryCollection() | ||
geomarea = [(i, geoms[i].area()) for i in range(len(geoms))] | ||
geomarea.sort(key=itemgetter(1)) | ||
if To_keep == 1: | ||
featres.setGeometry(geoms[geomrea[-1][0]]) | ||
else if To_keep > len(geoms): | ||
featres.setGeometry(geom) | ||
else: | ||
featres.setGeometry(geom) | ||
geomres = [geoms[i].asPolygon() for i,a in geomarea[-1 * To_keep]] | ||
featres.setGeometry(QgsGeometry.fromMultiPolygon(geomres)) | ||
writer.addFeature(featres) | ||
else: | ||
writer.addFeature(feat) | ||
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del writer |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1 @@ | ||
{"ALG_CREATOR": "Chourmo - v1", "To_keep": "Number of parts to keep, must be larger than 0", "ALG_DESC": "Keep n biggest sub polygon in a multipolygon, without exploding it...", "ALG_HELP_CREATOR": "Chourmo - v1", "Polygons": "Input layer"} |
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Original file line number | Diff line number | Diff line change |
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##Vector table tools=group | ||
##input=vector | ||
##class_field=field input | ||
##value_field=field input | ||
##output=output vector | ||
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from qgis.core import * | ||
from PyQt4.QtCore import * | ||
from processing.core.VectorWriter import VectorWriter | ||
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layer = processing.getObject(input) | ||
provider = layer.dataProvider() | ||
fields = provider.fields() | ||
fields.append(QgsField('UNIQ_COUNT', QVariant.Int)) | ||
writer = VectorWriter(output, None, fields, provider.geometryType(), | ||
layer.crs()) | ||
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class_field_index = layer.fieldNameIndex(class_field) | ||
value_field_index = layer.fieldNameIndex(value_field) | ||
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outFeat = QgsFeature() | ||
classes = {} | ||
feats = processing.features(layer) | ||
nFeat = len(feats) | ||
for n, inFeat in enumerate(feats): | ||
progress.setPercentage(int(100 * n / nFeat)) | ||
attrs = inFeat.attributes() | ||
clazz = attrs[class_field_index] | ||
value = attrs[value_field_index] | ||
if clazz not in classes: | ||
classes[clazz] = [] | ||
if value not in classes[clazz]: | ||
classes[clazz].append(value) | ||
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feats = processing.features(layer) | ||
for n, inFeat in enumerate(feats): | ||
progress.setPercentage(int(100 * n / nFeat)) | ||
inGeom = inFeat.geometry() | ||
outFeat.setGeometry(inGeom) | ||
attrs = inFeat.attributes() | ||
clazz = attrs[class_field_index] | ||
attrs.append(len(classes[clazz])) | ||
outFeat.setAttributes(attrs) | ||
writer.addFeature(outFeat) | ||
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del writer |