Numbering, clustering and cluster styling.
Show start marker on top of store markers?
Keeps the visitor’s own position drawn above the location markers, so it stays easy to spot in a dense area.
Enable marker clusters?
Merges markers that sit close together into a single numbered cluster that splits apart as the visitor zooms in. Recommended for any map with a large number of markers — both for legibility and because drawing hundreds of individual markers is slow.
Note that clustering changes how the hover effect in User Experience behaves.
Default style
The standard cluster look: a circle whose size steps up with the number of markers inside it.
Interpolation style
Colours each cluster on a gradient between two colours you pick, according to how many markers it holds. Denser clusters read as hotter. Useful when the distribution of your locations is the story.
Low density color
The colour used for the sparsest clusters. Interpolation style only.
High density color
The colour used for the densest clusters. Interpolation style only.
Label color
The colour of the count drawn inside a cluster. Check it against both of your density colours — a label that reads cleanly on the low-density colour can disappear on the high-density one.
Cluster marker shape
The shape a cluster is drawn as; Default (circles) plus the shapes available for the active map service.
Exclude the start marker from the marker cluster?
Keeps the visitor’s own position out of any cluster, so it always shows as a single marker. Without this, the start marker can vanish into a cluster and leave the visitor with no sense of where they are.
Max zoom level
Once this zoom level is reached or passed, every marker leaves its cluster and is drawn individually.
Leave it empty and Google Maps defaults to 16. OpenStreetMap adjusts it automatically based on how many markers there are.
Cluster size
The grid size of a cluster, in pixels — how close markers must be before they are grouped. A larger number produces fewer clusters and makes the algorithm run faster.
Leave it empty and it defaults to 80 for OpenStreetMap and 60 for Google Maps.
Related
- User Experience — the hover effect, which clustering affects
- Map — auto zoom, bounded by the same kind of ceiling