Venus_15x

thingiverse

A digital map for the planet Venus. A fifteen-fold exaggeration of elevations is used in this format, as requested by a planetarium in Argentina. This file is donated for free and designed for an eighteen-inch diameter sphere. The outer layer represents Venus itself, while the inner layer serves to create a thin shell that can be produced by a 3D printer. With both files combined, the resulting globe will be one-eighth of an inch thick. Please note that there may be some errors in the file that you can correct. Data sets were formatted using a sinusoidal projection. To obtain the data for Venus, visit this website: https://pds-geosciences.wustl.edu/mgn/mgn-v-gxdr-v1/mg_3002/gtdr/sinus/ The Perl software listed below takes the sinusoidal data and re-allocates it into a rectangular array of elevations: for ($row=0; $row<$row_max; $row++ ) { for ($column=0; $column<$col_max; $column++ ) { $lat = -1 * ( $row + 0.5 - $SPECLINE ) / $d; $lon = ($column + 0.5 - $PROJSAMP)/(cos($lat)*$d) + $PROJ_LON_RADIAN; $lat_deg = $lat*180/$pi; $lon_deg = $lon*180/$pi; $lat_integer = int((90-$lat_deg)*$resolution); $lon_integer = int(($lon_deg + 180)*$resolution); if(($lat_integer<=$vrow_max)&&( $lon_integer <=$vcol_max)&& ($lat_integer>=0)&&( $lon_integer>=0)) { # repair pixels that have no data ( 0 == no data) by using adjacent values