int nexusZ = AstralNexusLot.chunkZ;
int chunkX = platmap.originX + nexusX;
int chunkZ = platmap.originZ + nexusZ;
// is this natural or buildable?
platmap.setLot(nexusX, nexusZ, new AstralNexusLot(platmap, chunkX, chunkZ, NexusSegment.NORTHWEST));
platmap.setLot(nexusX + 1, nexusZ, new AstralNexusLot(platmap, chunkX + 1, chunkZ, NexusSegment.NORTHEAST));
platmap.setLot(nexusX, nexusZ + 1, new AstralNexusLot(platmap, chunkX, chunkZ + 1, NexusSegment.SOUTHWEST));
platmap.setLot(nexusX + 1, nexusZ + 1, new AstralNexusLot(platmap, chunkX + 1, chunkZ + 1, NexusSegment.SOUTHEAST));
}