Topography

Reference :

http://www.openstreetmap.org/copyright

https://www.mapbox.com/about/maps/

Magnetics

EMAG2: Earth Magnetic Anomaly Grid (2-arc-minute resolution)

EMAG2: Earth Magnetic Anomaly Grid (2-arc-minute resolution)

Reference :

https://www.ngdc.noaa.gov/geomag/emag2.html

http://www.ga.gov.au/data-pubs/data-compilations/geophysics

https://mrdata.usgs.gov/magnetic/

https://www.researchgate.net/publication/260106767_Total_Magnetic_Field_intensity_map_of_the_Republic_of_South_Africa

Faulting

Reference :

http://diss.rm.ingv.it/diss/index.php/help/57-databases-of-active-and-seismogenic-faults-in-the-world

Gravity

Global Gravity Field Model plus (GGMplus)

Global Gravity Field Model plus (GGMplus)

Reference :

http://geodesy.curtin.edu.au/research/resolution/

Lithology

Reference :

http://onlinelibrary.wiley.com/doi/10.1029/2012GC004370/full

Geology Code Descriptors :

ev    Evaporites
ig    Ice and Glaciers
mt    Metamorphics
nd    No Data
pa    Acid plutonic rocks
pb    Basic plutonic rocks
pi    Intermediate plutonic rocks
py    Pyroclastics
sc    Carbonate sedimentary rocks
sm    Mixed sedimentary rocks
ss    Siliciclastic sedimentary rocks
su    Unconsolidated sediments
va    Acid volcanic rocks
vb    Basic volcanic rocks
vi    Intermediate volcanic rocks
wb    Water Bodies
pr    Precambrian rocks
Cl    Complex lithology
     
Second Level: yy    
ad    Alluvial deposits
am    Mafic metamorphics mentioned
ds    Dune sands
gr    Greenstone mentioned
la    Laterites
lo    Loess
mx    Mixed grain size
or    Organic sediment
pu    (Pure) carbonate
py    Pyroclastics mentioned
sh    Fine grained
ss    Coarse grained
     
Third Level: zz    
bs    Black shale mentioned
ch    Chert mentioned
cl    Fossil plant organic material mentioned
ev    Subordinate evaporites mentioned
fe    Reduced-Iron minerals mentioned
gl    Glacial influence mentioned
mt    Metamorphic influence mentioned
ph    Phosphorous-rich minerals mentioned
pr    Subordinate plutonics mentioned
pt    Pyrite mentioned
sr    Subordinate sedimentary rocks mentioned
su    Subordinate unconsolidated sediments mentioned
vr    Subordinate volcanics mentioned
we    Intensive weathering

Water Sheds

HydroSHEDS (Hydrological data and maps based on SHuttle Elevation Derivatives at
multiple Scales)

Reference :

http://www.hydrosheds.org/