Polygon Featureを登録

作者:

参考サイト

最初にQgsGeometryを作成

points = []

point1=QgsPoint()
point1.setX(-31446.8)
point1.setY(-51366.4)
points.append(point1)

point2=QgsPoint()
point2.setX(-31446.8)
point2.setY(-50366.4)
points.append(point2)

point3=QgsPoint()
point3.setX(-30446.8)
point3.setY(-50366.4)
points.append(point3)

point4=QgsPoint()
point4.setX(-31446.8)
point4.setY(-51366.4)
points.append(point4)

line = QgsLineString()
line.setPoints(points)
poly = QgsPolygon()
poly.setExteriorRing(line)
geom = QgsGeometry(poly)

QgsGeometryをWKTから作成する時は

geom = QgsGeometry.fromWkt('Polygon ((-31446.7999999999992724 -51366.40000000000145519, -31446.7999999999992724 -50366.40000000000145519, -30446.7999999999992724 -50366.40000000000145519, -31446.7999999999992724 -51366.40000000000145519))')

Featureを作成

features = []
feature = QgsFeature(l.fields())
feature.setAttribute(0, 'HELLO100')
feature.setAttribute(1, 2)
feature.setGeometry(geom)
features.append(feature)
iface.activeLayer().dataProvider().addFeatures(features)
iface.activeLayer().triggerRepaint()

2019/01/15 修正
iface.activeLayer().addFeatures([feature])
を
iface.activeLayer().dataProvider().addFeatures(features)
に修正