Figure 1 on my Origins of Agriculture page was made by:
/usr/bin/xplanet -geometry 640x480 -shade 100 -starfreq 0 -latitude +0
-longitude +150 -projection mercador -markerfile agorigins_markers
-output agricultural_origins.gif
where the marker file content was:
# xplanet markers which show the centers of possible agricultural
# development.
# Labels
# x y
10 10 "Accepted Origins of Agriculture" image=none color=green position=pixel
31 10 "Possible Origins of Agriculture" image=none color=yellow position=pixel
# Locations
#Lat Long
40 -90 "Eastern US" align=above color=green symbolsize=20 # Eastern US
18 -98 "MesoAmerica" align=left color=green symbolsize=20 # Mesoamerica
-10 -75 "Andes" align=below color=green symbolsize=20 # Andes
-5 -60 "Amazonia" align=above color=yellow symbolsize=20 # Amazonia
-7 142 "New Guinea" align=below color=yellow symbolsize=20 # New Guinea
15 105 "Southeast Asia" align=right color=yellow symbolsize=20 # Southeast Asia
35 115 "Northern China" align=right color=green symbolsize=20 # Northern China
27 117 "Southern China" align=right color=green symbolsize=20 # Southern China
8 40 "Ethiopia" align=right color=yellow symbolsize=20 # Ethiopia
35 42 "Fertile Crescent" align=above color=green symbolsize=20 # Fertile Crescent
18 5 "Sahel" align=above color=yellow symbolsize=20 # Sahel
10 2 "Western Africa" align=below color=yellow symbolsize=20 # Western Africa
Figure 2 on the same page was made by:
/usr/bin/xplanet -geometry 640x480 -shade 100 -starfreq 0 -latitude +0
-longitude +150 -projection mercador -markerfile agdiffusion_markers
-greatarcfile agdiffusion_arcs -output agricultural_diffusion.gif
where the marker file was a small modification of the one above to change the label and colors and the file defining the great circle arcs was:
# xplanet great circle arcs which link areas of possible agricultural
# origin by estimated date (Diffusion theory).
# Great circles
#Lat Long Lat Long
35 42 31 120 color=red # Fertile Crescent to China
35 42 15 105 color=red # Fertile Crescent to Southeast Asia
35 42 18 5 color=red # Fertile Crescent to Southeast Sahel
35 42 8 40 color=red # Fertile Crescent to Ethiopia
15 105 -7 142 color=red # Southeast Asia to New Guinea
-7 142 18 -98 color=red # New Guinea to MesoAmerica
18 -98 40 -90 color=red # MesoAmerica to Eastern US
18 -98 -10 -75 color=red # MesoAmerica to Andes
18 -98 -5 -60 color=red # MesoAmerica to Amazonia