Description: Tips for creating and manipulating planet textures for Celestia.
are these maps available for us users ?
(and if so,how can I get one ?)
Malenfant wrote:...instead of having the obvious green continents and brown seafloor, try showing what the earth would really look like with no water at all. So there'd be no ice and no vegetation.
Or maybe you could have it with no vegetation but with ice (like Mars), so the ice would cover the whole of the upper latitudes (seafloor included) and high areas.
scaddenp wrote:What is your data source for the sea floor? (I can see it is not ficticious). The
best global bathymetry I know of is
ftp://falcon.grdl.noaa.gov/pub/walter/G ... _blend.bi2
Its a 1minute blend of the Gebco bathymetry (properly registered) with the
smith and sandwell predicted bathymetry grid derived from gravity inversion.
Code: Select all
gzip -cd < gebco_bathy.21601x10801.bin.gz | resc2pow2 21602 1 | nms 6378.140 16384 2.7 > gebco_bathy_nm16k.ppm
scaddenp wrote:t00fri wrote:Certainly, the latest Gebco data represent the best available bathymetry. Back in 2003, I also used the available Gebco data, of course.
Straight Gebco 1min grid has some known problems and is information-poor compared to the Gebco SS blend. The blend fixes the registration problem as well as adding in the detail only visible in SS.