Nodes

Center color, text or logo of solarsystem shape.

Basic

Security
Will display the solarsystem's security or average regional security on Region Overview map.

Constellation
Colors nodes after their constellation.

NPC faction
Colors nodes after their NPC faction and shows the NPC faction logo.

Custom marks
Shows the custom node color you set via the custom mark options of the solarsystem menu.

Activity

Hub Trade
Colors and labels nodes after the sum of total isk of buy and sell orders of the hub of that system. The hub is the npc-station within a solarsystem with highest value described. On Region Map it shows the sum of all hubs of that region.
M = Million isk
B = Billion isk
T = Tillion isk

Recent/24h kills
Colors nodes after ship + pod-kills within that solarsystem/region and displays the number.

Recent/24h NPC kills
Colors nodes after npc-kills within that solarsystem/region and displays the number.

Recent/24h jumps
Colors nodes after jumps to that solarsystem/region and displays the number.

Sovereignty

TCU alliance / faction logo
Shows the logo of the territorial claim unit owning alliance or sovereign faction.

IHUB Activity defense modifier
Colors nodes after the infrastrucutre hub owning alliance and displays the ADM index number.

IHUB Sovereign Coalition
Colors nodes after the sovereign coalition and displays the infrastrucutre hub owning alliance logo.

Warning

This data is pulled from http://coalitionsin.space/ and might be outdated due to lack of maintainance of that list.

Cost Indices

Colors nodes after the selected index and displays its index number. Available indices are:
Manufacturing
Invention
Copying
Time Efficiency research
Material Efficiency research

Celestial

Moons
Displays moon count within that system.

Planets
Displays the number of the selected planet-type. The brighter the node color the more planets of that type are within that solarsystem.