Points of interest and multiple geo-biomes per plot

README.org

@@ -222,7 +222,7 @@ We generate a number of plots for the planet based on it's surface area. We roug
 Each plot is a square of 100 kilometres across, and has a number of procedurally generated attributes.
 
 *** Geo-biomes
-Minerology and surface feature generation are both driven by the planetary geology, which abstracted to "geo-biomes". Each plot on a planet pulls a random geo-biome from the list of possible biomes given the environment. Biomes are weighted based on how probably their generation is given the environment.
+Minerology and surface feature generation are both driven by the planetary geology, which abstracted to "geo-biomes". Each plot on a planet pulls a number (between 1 and 4) of random geo-biomes from the list of possible biomes given the environment. Biomes are weighted based on how probably their generation is given the environment. These biomes are arranged on the plot using a cellular noise map.
 When looking at the list of possible geo-biomes, we first consider whether the planet is dead or not. Dead worlds have no volcanism, and no atmosphere. For dead worlds, every geo-biome except for impact and primordial is weighted as 0.2.
 
 **** Impact
@@ -307,67 +307,145 @@ Mode 34 and 27 can generate in Pegmatitic biomes.
 Modes 7-9, 19-20, 27, 35-38 can generate in Magmatic biomes.
 
 *** Surface Biomes
-Each plot has a surface biome randomly chosen from a set derived from the geo-biome. Surface biomes are different for terrestrial, metallic, and ice worlds as opposed to water worlds.
+Each geo-biome in the plot has between 1 and 4 surface biomes selected for it. Non-connected regions of the same geo-biome re-roll their surface biome.
+Surface biomes are different for terrestrial, metallic, and ice worlds as opposed to water worlds.
 
-These biomes also determine the sorts of surface features that can generate within the plot. For water worlds, these are submarine.
+These biomes also determine the sorts of surface features that can generate within the plot. For water worlds, these are submarine. 
 
 **** Terrestrial, Metallic, Ice
 ***** Primordial
 ****** Ancient Highlands
 The planet's original, battered crust. Heavy cratering, rugged landscape.
+
+Points of interest:
+- Small craters
 ****** Impact Basin
 A single vast circular depression from a massive impact, with concentric rings and a flat floor.
+
+Points of interest:
+- Large craters with concentric rings
+- Small craters
 ***** Magmatic
 ****** Shield Volcano
 A broad, gently sloping mountain.
+
+Points of interest:
+- Large, rolling mountains.
 ****** Stratovolcano
 A classic volcano built from alternating layers of lava and ash.
+
+Points of interest:
+- Large volcanoes
+- Dry lava flows
 ****** Volcanic Plateau
 An elevated plain formed by thick layers of lava that flooded from fissures, creating flat top mountains.
+
+Points of interest:
+- Flat top mountains
 ****** Lava Plain
 A flat terrain covered by young lava flows.
+
+Points of interest:
+- Dry lava flows
+- Active lava flows
 ***** Pegmatitic
 ****** Pegmatite DIke Swarm
 A network of mineral veins cutting through old rock, marked by large protruding crystals.
+
+Points of interest:
+- Large, solitary crystals.
 ****** Granitic Core Complex
 The exposed, deep interior of a solidifed magma chamber, showing large crystals.
+
+Points of interest:
+- Crystal field.
 ***** Fumarolic
 ****** Fumarole Field
 A rugged area pockmarked by gas vents and brightly coloured mineral crusts.
+
+Points of interest:
+- Fumaroles
+- Bright dirt patches
 ****** Solfatara
 A type of fumarole field creating extensive sulfar deposits.
+
+Points of interest:
+- Fumaroles
 ***** Hydrothermal
 Temperature is irrelevant for surface biome generation.
 ****** Geyser Basin
 A volatile area of hot springs, geysers, and mineral terraces.
+
+Points of interest:
+- Hot springs
+- Geysers
 ****** Epithermal Vein Field
 A rocky landscape crisscrossed by prominent mineral veins.
+
+Points of interest:
+- Large, protruding ore veins.
+- Large boulders
 ***** Sedimentary
 ****** Alluvial Fan
 A fan-shaped deposit of sediment where a steep stream slows upon entering a flat plain.
+
+Points of interest:
+- Debris field
 ****** Fluvial Channel
 The active or fossilized path of a river system.
+
+Points of interest:
+- Riverbed depression
 ****** Lacustrine Basin
 A dry or wet lakebed with fine layered sediments.
+
+Points of interest:
+- Dry lakebed
 ****** Aeolian Dune Field
 A desert of sand and other grains sculpted by wind into rolling dunes.
+
+Points of interest:
+- Sand dunes
 ***** Metamorphic
 ****** Collisional Mountain Belt
 A linear range of high, folded, and faulted mountains.
+
+Points of interest:
+- Mountains
 ****** Metamorphic Dome
 A large, rounded uplift.
+
+Points of interest:
+- Smooth, rolling hills.
 ***** Supergene
 ****** Gossan Cap
 A hilltop marking the weathered top of a large ore deposit.
+
+Points of interest:
+- Domes of exposed ore.
 ****** Lateritic Plateau
 A tableland capped by a thick, hard layer of iron or aluminium oxides.
+
+Points of interest:
+- Flat topped mountains
 ***** Impact
 ****** Complex Crater
 A large crater with a central peak or peak ring.
+
+Points of interest:
+- Large crate
+- Large peaked crater
 ****** Rayed Crater
 A relatively fresh impact crater with bright, linear streaks of ejecta.
+
+Points of interest:
+- Large crater
+- Impact ray
 ****** Palimpsest
 A fait, ghost-like circular scar where an ancient crater's topography has been erased over time.
+
+Points of interest:
+- Faint crater walls
 **** Water Worlds
 ***** Primordial
 ****** Abyssal Plain