Connecting lines with point in QGIS

Question

I have two shapefiles

Blue network
yellow locations

as shown in the below figure.

I want to connect all yellow dots with the blue lines blue as shown in red color in the figure.

Is there a way to connect all the yellow circles (buildings) to blues lines(roads)?

Have your researched enough your issue? By any means it is not a new topic on GIS SE. For instance, I may refer you to these threads: Joining attributes from points to lines QGIS, Joining attributes from nearest point in QGIS?, Moving points onto lines (~neighborhood) etc. — Taras, Jun 23 '20 at 11:15
As well as Finding distance between buildings and nearest road using QGIS? and Nearest distance between point and line layers in QGIS. Probably the last one is what you need, please pay attention to @Joseph's answer. — Taras, Jun 23 '20 at 11:21
@Taras. Yes. I already searched the answers and tried to use NNJoin plugin and also MMQGIS to connect the dots with the nearest road. But it is not working. I am quite new to QGIS and not aware of much options. — Case Msee, Jun 23 '20 at 11:43
Can you add those things (i.s. your efforts and current results) into the question, it would be appreciated. — Taras, Jun 23 '20 at 11:51

BERA · Accepted Answer · 2020-06-23T19:03:43.263

This is not taking any attributes into account (for example road name stored in each address point), just finds closest road using closestSegmentWithContext. Then you can merge (or spatial join etc.) output lines with your roads.

roadlyr = QgsProject.instance().mapLayersByName('TR_ROAD')[0]
addrlyr = QgsProject.instance().mapLayersByName('ADDRESS')[0]
#List all features
adresses = [f for f in addrlyr.getFeatures()]
roads = [f for f in roadlyr.getFeatures()]
#Create empty vector layer
vl = QgsVectorLayer("LineString?crs={}&index=yes".format(roadlyr.crs().authid()), "myLayer", "memory")
provider = vl.dataProvider()
#For each adress find closest road
for adress in adresses:
    closest_road = min([road.geometry().closestSegmentWithContext(adress.geometry().asPoint()) for road in roads], key=lambda x: x[0]) #Find which road is closest to current address. Index 0 is the distance
    gLine = QgsGeometry.fromPolyline([QgsPoint(adress.geometry().asPoint()), QgsPoint(closest_road[1])]) #Index 1 is the PointXY geometry of the closest road location
    f = QgsFeature()
    f.setGeometry(gLine)
    provider.addFeature(f)
QgsProject.instance().addMapLayer(vl)

Connecting lines with point in QGIS

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