Moon LROC WAC GLD100 ColorShade 79S79N 118m

Primary Authors

USGS Astrogeology Science Center

Originators

LROC Team, German Aerospace Center (DLR)

Publisher

USGS Astrogeology Science Center

Abstract

Product Information: This product represents a near-global lunar topography from stereo image data acquired by the Wide-angle Camera (WAC) of the Lunar Reconnaissance Orbiter Camera (LROC) system (Robinson et al., 2010). From polar orbit tracks, the LROC WAC provides image data with a mean ground resolution at nadir of 75 meters per pixel (m) with substantial cross-track stereo overlap. WAC stereo images from the one-year nominal mission and the first months of the science mission phase are combined to produce a near-global digital terrain model (DTM) with a pixel spacing of 100m, the Global Lunar DTM 100m (GLD100). It covers 79S to 79N latitudes, 98.2% of the entire lunar surface. This is a color hillshade of the original WAC GLD100 stereo DTM with resolution of 118 meters per pixel (m). Mission and Instrument Information: The U.S. National Aeronautics and Space Administration (NASA) launched the Lunar Reconnaissance Orbiter (LRO) spacecraft to the Moon in June 2009 (Tooley et al., 2010) carrying a variety of instruments that continue to return high-resolution images of the lunar surface from its eccentric polar mapping orbit (Petro et al., 2019). The LRO is a robotic spacecraft designed to acquire data to prepare for and support future human exploration of the Moon. The Lunar Reconnaissance Orbiter Camera (LROC) is a system of three cameras mounted on the LRO that capture high resolution black and white images and moderate resolution multi-spectral images of the lunar surface (ASU, 2019). The LROC consists of two narrow-angle cameras (NACs) that provide 0.5 meter-scale panchromatic images over a 5 km swath , a wide-angle camera (WAC) to provide images at a scale of 100 meters/pixel in seven color bands over a 60 km swath, and a Sequence and Compressor System (SCS) supporting data acquisition for both cameras. The LROC data sets are produced by the LROC Team at the Tempe campus of Arizona State University (PDS IMG, 2018). References: Arizona State University (ASU) (2019). About Lunar Reconnaissance Orbiter. https://www.lroc.sese.asu.edu Petro, N. E., Keller, J. W., Cohen, B. A., & McClanahan, T. P. (2019). Ten years of the Lunar Reconnaissance Orbiter: Advancing lunar science and context for future lunar exploration. Paper presented at the 50th Lunar and Planetary Science Conference, Lunar and Planetary Institute, Houston, TX. https://www.hou.usra.edu/meetings/lpsc2019/pdf/2780.pdf Planetary Data Systems (PDS) Cartography and Imaging Sciences (IMG) (2018). Lunar Reconnaissance Orbiter. https://pds-imaging.jpl.nasa.gov/portal/lro_mission.html Robinson, M. S., Brylow, S. M., Humm, D., Lawrence, S. J., Thomas, P. C., Denevi, B. W., Bowman-Cisneros, E., et al. (2010). Lunar Reconnaissance Orbiter Camera (LROC) instrument overview. Space Science Review, 150, 81–124. https://doi.org/10.1007/s11214-010-9634-2 Scholten, F. J., Oberst, J., Matz, K.-D., Roatsch, T., Wählisch, M., Speyerer, E. J., Robinson, M. S. (2012). GLD100: The near-global lunar 100 m raster DTM from LROC WAC stereo image data. Journal of Geophysical Research, 117(E12). https://doi.org/10.1029/2011JE003926 Tooley, C. R., Houghton, M. B., Saylor Jr., S. S., Peddie, C., Everett, D. F., Baker, C. L., & Safdie, K. N. (2010). Lunar Reconnaissance Orbiter mission and spacecraft design. Space Science Review, 150, 23–62. https://doi.org/10.1007/s11214-009-9624-4

Purpose

For outreach and graphical purposes.

Contact and Distribution

Format

Remote-sensing Data, Shaded-Relief Map, Topographic Map

Access Constraints

None

Access Scope

PDS

Use Constraints

Public domain

Edition

1

Supplemental Information

http://wms.lroc.asu.edu/lroc/view_rdr/WAC_GLOBAL, https://www.hou.usra.edu/meetings/lpsc2015/pdf/1473.pdf, https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2013JE004580, http://lroc.sese.asu.edu/about, https://www.lpi.usra.edu/meetings/lpsc2011/pdf/2046.pdf

Native Data Set Environment

ISIS v3

Astrogeology Theme

Image Processing, Topography

Mission Names

Lunar Reconnaissance Orbiter

Instrument Names

LROC

Online Package Link

https://astrogeology.usgs.gov/search/map/moon_lroc_wac_gld100_colorshade_79s79n_118m

External File Size

11GB

Online File Link

https://planetarymaps.usgs.gov/mosaic/Lunar_LROC_WAC_GLD100_ClrShade_79s79n_118m_v1_1.tif

Contact Address

2255 N. Gemini Drive

Contact City

Flagstaff

Contact State

AZ

Contact Postal Code

86001

Contact Email

astroweb@usgs.gov

Currentness Reference

Publication date

Progress

In Work

Update Frequency

As needed

Logical Consistency

The original WAC Digital Terrain Model (DTM) was constructed from WAC stereo images. This new map is called the Global Lunar DTM 100 m topographic model, or "GLD100", and covers 98.2% of the lunar surface. Using digital photogrammetric techniques the GLD100 was computed from 69, 000 WAC stereo models. Since the stereo correlation box is bigger than 100 meters, surface details at the 100-meter scale are not fully resolved. However, each 100-meter square has an average of 26 stereo points within it (for a planet-wide total of 100 billion points), which helps to sharpen the elevation estimate. The resolution, in a formal sense, is probably close to 300 meters, and the accuracy of the elevations is estimated to be about 10 to 20 meters (Scholten et al JGR in press). The WAC topography was produced by LROC team members at the German Aerospace Center (DLR).

Completeness Report

The GLD100 thus covers from 79° S latitude to 79° N latitude. Due to persistent shadows near the poles it is not possible to create a complete WAC stereo map at the very highest latitudes.

Process Description

Using the GLD100 topography, a color relief was created using Global Mapper and exported to a GeoTiff. This was brought back into ISIS for use in Map-a-Planet 2. Pixels do not contain any of the original explicit elevation information. The colorized shaded-relief represents approximate elevations based on the original topographic data. Elevations values are mapped based on the defined red, green, and blue look-up-table shown next. Elevation_m Red Green Blue
-9000.0 56 2 123
-8000.0 0 0 89
-7000.0 0 94 187
-5000.0 60 157 255
0.0 215 255 255
2000.0 255 255 255
4000.0 192 192 192
6000.0 128 128 128
7000.0 83 83 83
8000.0 51 51 51
10000.0 52 31 31

Source Title

GLD100 WAC Global DTM

Source Online Linkage

{http://pds-geosciences.wustl.edu/lro/lro-l-lola-2-edr-v1/lrolol_0xxx/data/lola_edr/,https://pds-imaging.jpl.nasa.gov/volumes/lro.html,http://pds-geosciences.wustl.edu/missions/lro/lola.htm,https://pds-imaging.jpl.nasa.gov/portal/lro_mission.htm,http://wms.lroc.asu.edu/lroc/view_rdr/WAC_GLD100}

PDS Status

PDS 3 Like

Attribute Accuracy Report

Best Effort

Horizontal Positional Accuracy Report

Accurate to Control Net

Vertical Positional Accuracy Report

Accurate to Control Net

Geospatial Information

Target

Moon

System

Earth

Minimum Latitude

-79

Maximum Latitude

79

Minimum Longitude

-180

Maximum Longitude

180

Direct Spatial Reference Method

Raster

Object Type

Grid Cell

Raster Row Count (lines)

40448

Raster Column Count (samples)

92160

Bit Type (8, 16, 32)

8

Quad Name

Radius A

1737400

Radius C

1737400

Bands

3

Pixel Resolution (meters/pixel)

118.45058759

Scale (pixels/degree)

256

Map Projection Name

Equirectangular

Latitude Type

Planetocentric

Longitude Direction

Positive East

Longitude Domain

-180 to 180