Here's a specific planetary texture source (Bjorn Jonsson from Iceland) with more specific permissions (attribution):
http://www.mmedia.is/~bjj/planetary_maps.html All the planetary maps available on these pages are publicly available. You do not need a special permission to use them but if you do then *please mention their origin in your work*, e.g. "created by Björn Jónsson" (or "Bjorn Jonsson" for all of you 8 bit character set challenged out there ;) or something equivalent. You are also welcome to link to the maps from your own website. However, *please do not place a copy of the maps on your website*. One reason for this is that from time to time I "upgrade" the maps with improved versions and I don't want to have old, obsolete versions of my maps scattered around on the web. Maybe "embedded in a game" is OK. I can certainly ask him. --- Jeff On Thu, Aug 21, 2008 at 2:53 AM, Jeffrey Miller <[EMAIL PROTECTED]>wrote: > The black dots represent unpainted background due to a mismatch between the > (for latitude: for longitude:) iteration over the grain of the original map > with the projected coordinates of the viewport. In other words, no cell on > the original map reprojected right on that pixel. Adding a tilt or twist > seems to make this problem worse. Cheap fixes include post-processing to > smooth away black pixels within the disk, or chopping up the original map > into more identically colored adjacent pixels to give a finer grain and > higher likelihood of painting all the pixels in the disk. > > The right thing to do is probably to code up a reverse projection from > "disk view" space back to "map" space and iterate over pixels within the > disk so that nothing in the disk view remains unpainted. > > --- > > According to the web site note, the maps are individually available for > re-use according to various terms -- probably a "credit given" , but I > haven't written to the site owner yet. Let me do that tomorrow (after I > sleep and collect my wits, before I go out of town again for part 2 of my > vacation week). > > "Most of these maps below are slightly "tweaked" from public domain maps; > some are based on maps/data which should also be credited to the original > authors (even if public domain, they deserve credit), so please contact me > regarding redistribution, commercial use, etc." -- Wm. Robert Johnson. > > So in some cases I could go back to William Robert Johnson's sources, or I > could just see if some kind of credit is appropriate. Does Thousand Parsec > have an official "About" or "Credits" section? > > -- Jeff > > > On Mon, Aug 18, 2008 at 7:04 PM, Tim Ansell <[EMAIL PROTECTED]> wrote: > >> Hey jsmiller, >> >> That looks pretty cool. Where are the black dots coming from? >> >> Do you know what license these files are under? If they are public >> domain it would be good to add them to our repository. >> >> Tim >> >> On Wed, 2008-08-13 at 22:48 -0700, Jeffrey Miller wrote: >> > Follow-up: I found some cylindrical projection planetary maps here: >> > >> > http://www.johnstonsarchive.net/spaceart/cylmaps.html >> > >> > which seem to work well as textures, allowing for some missing data. >> > Attached is an example of a reprojected Jupiter disk. >> >> >> >> _______________________________________________ >> tp-devel mailing list >> [email protected] >> http://www.thousandparsec.net/tp/mailman.php/listinfo/tp-devel >> > >
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