urn:nasa:pds:mess_mla_calibrated:data_gdr:hdem_45n_1000m 1.0 1.10.1.0 Product_Observational 2018-07-23 1.0 PDS4 migrated product. 2008-01-14T00:00:00Z 2015-04-30T00:00:00Z MESSENGER Mission urn:nasa:pds:context:investigation:mission.messenger data_to_investigation MESSENGER Spacecraft urn:nasa:pds:context:instrument_host:spacecraft.mess is_instrument_host Mercury Laser Altimeter Instrument urn:nasa:pds:context:instrument:mla.mess is_instrument Mercury Planet urn:nasa:pds:context:target:planet.mercury data_to_target mlasciencegdr gdr_hdem_polar_1000m display_settings_to_array Sample Left to Right Line Top to Bottom gdr_hdem_polar_1000m cartography_parameters_to_image_object -180.0 180.0 90.0 45.0 Polar Stereographic 180 90 Coordinate Pair 1000 1000 42.586 42.586 -2047500.0 2047500.0 planetocentric mercury 2439400 2439400 2439400 Positive East hdem_45n_1000m.img 2016-04-11T00:00:00Z 33554432 This data product is a shape map (radius) of Mercury at a resolution of 1000m/pix by 1000m/pix, true at the pole in polar stereographic (spherical) projection, based on altimetry data acquired by the MLA instrument. The MLA Laser data through Mercury Orbit Year 5 are the source for this gridded product. The ground tracks are interpolated using the Generic Mapping Tools programs 'mapproject', 'blockmedian' and 'surface'. The map is in the form of a binary table. Map values are relative to a radius of 2439.4 km. This label describes an IMG file in the form of a binary resampling with pixel registration. /* NOTE: */ /* Conversion from Digital Number to HEIGHT, i.e. elevation in meters, is: */ /* HEIGHT = (DN * SCALING_FACTOR). */ /* The conversion from Digital Number to PLANETARY_RADIUS in meters is: */ /* PLANETARY_RADIUS = (DN * SCALING_FACTOR) + OFFSET */ /* where OFFSET is the radius of a reference sphere. */ /* The planetopotential TOPOGRAPHY is PLANETARY_RADIUS - GEOID_RADIUS, */ /* where GEOID_RADIUS is derived from a gravitational equipotential model. */ /* By convention, the average GEOID_RADIUS at the equator is OFFSET. */ gdr topographic height gdr_hdem_polar_1000m 0 2 Last Index Fastest SignedLSB2 meter 0.5 2439400 Line 4096 1 Sample 4096 2 -32768 7952 -11188 hdem_45n_1000m.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed