Add a Line



Add a line

Follow the steps below to add a new linear feature:


Click Add new in the left panel and select Draw a Line. from the drop-down menu, then choose the type of the feature you'd like to draw.


You can use the same steps to add many types of features such as Flyover/Underpass,River, Railways, Trails / Paths, and more. 
Select Road from the drop-down menu. 
To begin drawing the road, click and place the nodes in exact alignment with thesatellite imagery. Choosing Satellite View with Labels while drawing is important for accurate alignment. 
If no satellite imagery is available, you can use your own KML data to map an area. Please see the Using Overlays article for information on how to use your own maps and images to draw the feature.




Press Enter to finish. Click Esc to cancel the drawing. You can also use the Save orCancel options on the left panel. 
After you've finished the drawing, you might be prompted to specify whether your road is new or an extension of an existing road. Select Create a new road if your feature is new, then click Next to proceed. 
If the road you’ve drawn is an extension, select from the following options: 
Extend the road: By choosing Extend the road, a road will be created with the same name (if specified) and attributes as the previous section. Learn more in the extending linear features article. 
Create a new road: Choose Create a new road if you want to create a road with default attributes and a different name. Any changes made to this road will not affect the previous segment.


A form will appear in the left panel. Fill in the details and click Save. 
Your edit might require review by other mappers. For more details, refer to the review FAQs. Once approved, your feature will go live on Google Maps. 


Best Practices: 
Alignment: The alignment of the road should be accurate with the satellite imagery. Roads should not pass through buildings, overlap other roads, or follow the same path as a river or railway. 
Overshoot/Undershoot: The road addition should not have any overshoot or undershoot and should properly intersect with the connecting road as per the satellite imagery. 
Connectivity: When drawing loops or roundabouts, it's necessary to draw the feature in two steps since a new segment can't intersect with itself. 
Single Stretch: Roads should be drawn as individual segments stopping at intersections as roads may have different names. 
Duplicates: Refrain from adding the road where the road already exists. 
Inappropriate Information: The road name and description should not contain personal information. 
Existence of the feature: Linear features should be visible in satellite imagery. When creating new features that are not visible in satellite imagery, please provide information about the existence of the feature in the 'About this feature' section. 
If two buildings are connected by an elevated pedestrian walkway, the feature should not be added as a linear feature. It can be included as part of a building shape instead. 
Make sure that the Road you have added does not overlap with any other Road. 
Street View Support : The linear feature you have added should also support the street view wherever available. 
Airstrips or runways shouldn't be added as lines; you can add these features asshapes instead. 
When adding lines, it's best to draw a continuous line between intersections. Drawing multiple short segments makes the line overly complicated, particularly for future edits. 
Gated emergency access roads should not be added to the map at this time because they could cause confusion for users while routing. This includes locked auxiliary gates that cannot be used by residents or guests of apartment complexes. 
High Occupancy Vehicle (HOV) or carpool lanes should only be drawn as separate lines if they have physically separate geometry from the main highway. 
An HOV lane should not be drawn as a separate segment if it: 
Does not have physically separate geometry. 
Is separated from the main highway by only a painted median or physical divider. 




Alignment


Click along the path where you'd like to draw the feature to create the line as a set of nodes. The line between any two adjacent nodes is always straight. Smaller nodes are formed automatically after you've finished drawing and can be moved to fine-tune the alignment.
Lines


By placing the nodes carefully, you can draw lines of any geometry. The geometry of the road is defined only by big nodes. Clicking a small node converts it into a big node.


This screenshot shows how nodes can be placed close together to accurately draw a curvy road:




To delete a node, right-click it and select Delete this point.





To finish, click Enter. Click Esc to cancel the drawing. You can also use the Save andCancel options on the left panel.
Best Practices 
Draw at the maximum (nearest) zoom level to ensure the most accurate alignment. 
Roundabouts won't connect if you draw them in a single segment. To mark them, draw at least two segments. 
Make sure to correct the alignment of the roads connecting to the intersection if they are disturbed while moving the intersection. 
It is always recommended to put a comment about the feature's existence, in case the feature is not supported by the satellite imagery or the Street View. 


Be sure to draw the road in exact alignment with the satellite imagery. Without this step, the road will appear out of sync on Google Maps.

Overshoot/undershoot


Whenever two or more roads connect in Map Maker, an intersection is formed. These intersections are automatically created when a road segment intersects with another one.
How to connect a new road to an existing road


New roads should always be connected to at least one other road. Once you've selected the category for the new road, follow the steps below to begin drawing the road: 
Left-click to begin drawing the road, ensuring that the start/end marker is close to the road you're trying to connect to. 
Finish the drawing by double-clicking or clicking Enter. 
Note that moving the road endpoint will not connect the roads; please see below for information about how to correct overshoot or undershoot. 


If the roads intersect as intended, both will be highlighted. This screenshot shows a correctly connected road:


Overshoot :


An Overshoot occurs when the drawn segment extends beyond the actual junction visible on satellite imagery.
Correcting an Overshoot :


Overshoots can be fixed by deleting the extra segment


Undershoot :


An Undershoot occurs when the drawn road segment stops before connecting to the junction as visible in the satellite imagery.


Correcting an Undershoot : 
If the gap is wide enough, draw a new road in between the undershoot road and the junction. 
If the gap is quite narrow, move the end point of the undershoot road backwards to make the gap wide enough and then draw a new road in between. 




Floating lines


When you draw a new linear feature that connects to another linear feature that's still awaiting review, you create a floating feature.




Here, segment AB is a road pending review. CD is a new road that connects to the pending road. In this case, CD becomes the floating feature and AB becomes the dependent edit.


Mapping floating features


You can only submit the name (and priority) of a floating feature while mapping. All other details are picked automatically from the connecting segments once they have been approved.


The feature that's pending review (in other words, the dependent edit) might not necessarily be the one directly connecting to your newly drawn feature (the floating feature). It may be anywhere in the connecting linear network.