urn:nasa:pds:mess_mla_calibrated:data_gdr:hdem_64 1.0 1.10.1.0 Product_Observational 2018-07-24 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_64 display_settings_to_array Sample Left to Right Line Top to Bottom gdr_hdem_64 cartography_parameters_to_image_object 0.0 360.0 90.0 -18.0 Equirectangular 0 180.0 0.0 Coordinate Pair 665.243 665.243 64.0 64.0 -7663266.7385 3831467.0585 planetocentric mercury 2439400.0 2439400.0 2439400.0 Positive East hdem_64.img 2016-12-10T00:00:00Z 318504960 This data product is a cylindrically projected shape map (radius) of the northern hemisphere of Mercury at a resolution of 0.665243 km/pix by 0.665243 km/pix, based on altimetry data acquired through the Mercury Orbit Year 5 Mapping Phase by the MLA instrument. MLA altimetry data are the source for this data set. Ground tracks were interpolated using the Generic Mapping Tools program 'surface'. The map is in the form of a binary table with one row for each 0.015625 degrees of latitude, pixel registered. Map values are relative to a radius of 2439.4 km. This label describes an IMG file. This raster image is composed of a set of pixels that represent finite areas, and not discrete points. The center of the upper left pixel is defined as line and sample (1,1). The [LINE,SAMPLE]_PROJECTION_OFFSET elements are the pixel offset from line and sample (1.0,1.0) to the map projection origin (defined by the CENTER_LATITUDE and CENTER_LONGITUDE elements). These offset values are positive when the map projection origin is to the right or below the center of the upper left pixel. /* 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 */ gdr topographic height gdr_hdem_64 0 2 Last Index Fastest SignedLSB2 meter 0.5 2439400 Line 6912 1 Sample 23040 2 -32768 9459 -11605 hdem_64.lbl 0 PDS3 Original PDS3 label Carriage-Return Line-Feed