{
	"key": "vt-moon-topography-nasa",
	"name": "32K Moon topography NASA (SVS, DEM LRO:LOLA)",
	"type": "virtualtex-pack",
	"version": 1,
	"mingsversion": 30400,
	"size": 48323624,
	"nobjects": 1,
	"description": "32K Moon topography virtual texture (NASA Scientific Visualization Studio, dataset: DEM LRO:LOLA). he displacement map (also known as a height map or elevation map) was taken directly from the latest (as of spring 2019) gridded data products of the Lunar Orbiter Laser Altimeter instrument team. LOLA data is archived on the Geosciences Node of the Planetary Data System. A small subset of the LOLA data stored there, the global cylindrical projections at 4, 16, and 64 pixels per degree, has been reformatted here as uncompressed TIFF files, in vertical units of either floating-point kilometers or 16-bit unsigned integer half-meters.\nThe reference surface for all LRO data is a sphere of radius 1737.4 km. LOLA's gridded elevation data is published as signed 16-bit integers in units of half-meters relative to this radius. For the floating-point TIFFs, the source data was divided by 2000. For the unsigned 16-bit TIFFs, the source data was offset by +20,000 (10 km) so that all of the values are positive. This latter format is provided for software that doesn't work well with either floating-point or signed integer files. Credits: Ernie Wright (USRA), Noah Petro (NASA/GSFC).",
	"releasenotes": "- First version.",
	"link": "https://svs.gsfc.nasa.gov/4720",
	"check": "$data/vt-moon-topography-nasa/dataset.json",
	"files": [
		"$data/vt-moon-topography-nasa"
	],
	"data": [
		{
			"loader": "gaiasky.data.JsonLoader",
			"files": [
				"$data/vt-moon-topography-nasa/vt-moon-topography-nasa.json"
			]
		}
	]
}