Legend facet colours insufficient

[GoogleCodeExporter]

The SP legend facets run out of colour options when number of classes > 30 (see 
attached. All classes after 31 are brown.

Original issue reported on code.google.com by leebel...@gmail.com on 28 Apr 2014 at 1:53

• Merged into: #506

Attachments:

• Capture.jpg

[GoogleCodeExporter]

I think its well documented that people find it hard to discern between more 
than 20 colours (and 10% of males are red-green colour blind).

Whats the suggested fix ?   Reuse of colours ? 

Original comment by moyesyside on 28 Apr 2014 at 3:08

• Changed state: Accepted
• Added labels: Biocache, Priority-Medium
• Removed labels: Priority-High, SpatialPortal

[GoogleCodeExporter]

Re-use of colours would be better than one colour block at the tail. I'm unsure 
what palette is available and what granularity is possible. I thought Adam had 
previously handled this as this 'brown block' is new to me.

Original comment by leebel...@gmail.com on 28 Apr 2014 at 3:13

[GoogleCodeExporter]

Previously the number of facet values was limited in SP - hence you didn't see 
the brown block.

Original comment by moyesyside on 28 Apr 2014 at 3:17

[GoogleCodeExporter]

First handling of this was the grouping each class >30 under 'Others'. 

Not reusing colours means that you have a hope (though rather small) of 
distinguishing the larger classes on the map.

Reusing colours means that you have no hope of distinguishing any class.  
Especially when classes are in the thousands.

There will always be the issue of overlapping points on the map that hide 
classes from being displayed.

The current approach to address the limit of distinguishable colours and 
overlapping points is to highlight selected classes on the map.  

Original comment by adam.col...@gmail.com on 28 Apr 2014 at 3:23

[GoogleCodeExporter]

Original comment by adam.col...@gmail.com on 1 May 2014 at 11:55

• Changed state: Duplicate