PROJECT NAME
  Dataset for "Stratigraphic Evidence for Early Martian Explosive Volcanism in Arabia Terra"


TECHNICAL CONTACT INFORMATION
  NAME	JACOB RICHARDSON
  INSTITUTION	UNIVERSITY OF MARYLAND
  EMAIL	JACOBGEO@UMD.EDU

AUTHORS
  Jacob Richardson
  Patrick Whelley
  Alexandra Matiella Novak

DATE CREATED
  January 11, 2021

SITE-SPECIFIC INFORMATION
  SITE A DEM/DRG RASTERS
    MRO CTX SOURCE IMAGES
      G21_026323_2056_XN_25N019W
      G22_026811_2052_XN_25N019W
    Extents:
       Min. Lat.: 24d 4'46.24"N
       Min. Lon.: 19d45'27.37"W
       Max. Lat.: 26d34'55.97"N
       Max. Lon.: 19d 0'25.65"W
    Central Longitude: 19d22'56.60"W
    DEM/DRG Spatial Resolution: 5.9 m/px

  SITE B DEM/DRG RASTERS
    MRO CTX SOURCE IMAGES
      G04_019598_2038_XN_23N018W
      J04_046314_2036_XN_23N018W
    Extents:
       Min. Lat.: 22d12'47.69"N
       Min. Lon.: 19d14'14.95"W
       Max. Lat.: 24d54'26.52"N
       Max. Lon.: 18d28'27.58"W
    Central Longitude: 18d51'19.39"W
    DEM/DRG Spatial Resolution: 5.5 m/px

  SITE C DEM/DRG RASTERS
    MRO CTX SOURCE IMAGES
      B02_010301_2200_XN_40N003W
      J03_045865_2199_XN_39N003W
    Extents:
       Min. Lat.: 39d 4' 9.66"N
       Min. Lon.:  3d29' 5.50"W
       Max. Lat.: 40d20'37.43"N
       Max. Lon.:  2d38'20.63"W
    Central Longitude:  3d 3'42.60"W
    DEM/DRG Spatial Resolution: 6.4 m/px

  SITE D DEM/DRG RASTERS
    MRO CTX SOURCE IMAGES
      G23_027258_2161_XN_36N345W
      P22_009773_2164_XN_36N345W
    Extents:
       Min. Lat.: 13d58' 6.97"E
       Min. Lon.: 13d58'30.48"E
       Max. Lat.: 36d33'57.73"N
       Max. Lon.: 14d44'20.79"E
    Central Longitude: 14d21'12.89"E
    DEM/DRG Spatial Resolution: 5.6 m/px

  SITE E DEM/DRG RASTERS
    MRO CTX SOURCE IMAGES
      F20_043660_2024_XI_22N287W
      P15_007055_2019_XN_21N287W
    Extents:
       Min. Lat.: 20d16'46.40"N
       Min. Lon.: 72d18' 0.59"E
       Max. Lat.: 23d18'19.69"N
       Max. Lon.: 73d 4'49.97"E
    Central Longitude: 72d41'23.23"E
    DEM/DRG Spatial Resolution: 5.4 m/px

  SITE F DEM/DRG RASTERS
    MRO CTX SOURCE IMAGES
      D02_028179_2089_XI_28N286W
      G21_026557_2089_XN_28N286W
    Extents:
       Min. Lat.: 27d 3'12.60"N
       Min. Lon.: 72d45'10.37"E
       Max. Lat.: 30d15' 5.62"N
       Max. Lon.: 73d42'54.70"E
    Central Longitude: 73d14' 2.14"E
    DEM/DRG Spatial Resolution: 5.5 m/px

  SITE G DEM/DRG RASTERS
    MRO CTX SOURCE IMAGES
      D04_028957_2063_XN_26N284W
      J05_046772_2064_XN_26N284W
    Extents:
       Min. Lat.: 23d32'58.90"N
       Min. Lon.: 75d 5'50.56"E
       Max. Lat.: 28d45'56.42"N
       Max. Lon.: 76d18'21.11"E
    Central Longitude: 75d42' 4.74"E
    DEM/DRG Spatial Resolution: 5.5 m/px

REFERENCES
For analysis performed with these Digital Elevation Models (DEMs), see the following publications.

DEM creation was funded by the Mars Data Analysis Program Grant Number: 80NSSC19K0044

P.L. Whelley, M.A. Matiella Novak, J.A. Richardson, J.E. Bleacher, K. Mach, and R.N. Smith. Stratigraphic Evidence for Early Martian Explosive Volcanism in Arabia Terra. In Preparation. doi: tk

P.L. Whelley, M.A. Matiella Novak, J.A. Richardson, and J.E. Bleacher. Arabia Terra Layered Deposit Stratigraphy and Distribution: Evidence for Early Martian Explosive Volcanism?. 50th Lunar and Planetary Science Conference, 2019. The Woodlands, TX, p. Abstract 1085. https://www.hou.usra.edu/meetings/lpsc2019/pdf/1085.pdf

PROCESSING NOTES
- Ames Stereo Pipeline v 2.6.0 was used to extract an elevation model and an orthoimage in GeoTIFF format.
- Processing steps used USGS ISIS Version 3.4.12.6662
- CTX DEMs were aligned to the martian aeroid with Mars Orbiter Laser Altimeter Precision Experiment Data Records within the spatial footprint of the CTX DEM.
- Rasters are in Sinusoidal Projection with a Central Longitude corresponding to the individual raster's center.

KNOWN ARTIFACTS
  These are known artifacts present in most stereophotogrammetric elevation models. Artifacts present in this DEM might include Faceted areas in regions where original photographs were low contrast or dark and noise resulting from not-optimal camera look angles. These data are archived with no guarantee that they will have sufficient accuracy for every possible investigation.

PRODUCT NAMING CONVENTION
  The naming convention for DEMs is: CTX_DEM_xxxxxx_yyAzzzB.tif where
        - CTX_DEM = indicating it's a CTX DEM product
        - xxxxxx = words specifying the sitename (a-g; up to 6 characters)
        - yyy = center latitude	to the nearest degree
        - A = N for northern hemisphere, S for southern hemisphere
        - zzzz = center longitude to the nearest degree.
        - B = E for east of meridian, W for west of meridian
  Example: 	CTX_DEM_SITE-Y_28N120E.tif is a CTX DEM of Site Y located at latitude=28N,
                 longitude=120E.

ORTHO-RECTIFIED IMAGE PRODUCTS
  For each CTX DEM, we also produce ortho-rectified images (Digital Raster Graphics; DRG) with Ames Stereo Pipeline. The naming convention for these products is CTX_DEM_xxxxxx_yyAzzzB_DRG.tif, following details above.

COPYRIGHT
  As the development of these data was funded by the United States Government, this dataset is in the public domain within the United States. Additionally, we waive copyright and related rights in this work worldwide through the CC0 1.0 Universal Public Domain Dedication.