Dataset for: Bedding scale correlation on Mars in western Arabia Terra

Dataset for: Bedding scale correlation on Mars in western Arabia Terra

A.M. Annex et al.

Data Product Overview

This repository contains all source data for the publication. Below is a description of each general data product type, software that can load the data, and a list of the file names along with the short description of the data product.

HiRISE Digital Elevation Models (DEMs).

HiRISE DEMs produced using the Ames Stereo Pipeline are in geotiff format ending with ‘*X_0_DEM-adj.tif’, the “X” prefix denotes the spatial resolution of the data product in meters. Geotiff files are able to be read by free GIS software like QGIS.

HiRISE map-projected imagery (DRGs).

Map-projected HiRISE images produced using the Ames Stereo Pipeline are in geotiff format ending with ‘*0_Y_DRG-cog.tif’, the “Y” prefix denotes the spatial resolution of the data product in centimeters. Geotiff files are able to be read by free GIS software like QGIS. The DRG files are formatted as COG-geotiffs for enhanced compression and ease of use.

3D Topography files (.ply).

Traingular Mesh versions of the HiRISE/CTX topography data used for 3D figures in “.ply” format. Meshes are greatly geometrically simplified from source files. Topography files can be loaded in a variety of open source tools like ParaView and Meshlab. Textures can be applied using embedded texture coordinates.

3D Geological Model outputs (.vtk)

VTK 3D file format files of model output over the spatial domain of each study site. VTK files can be loaded by ParaView open source software. The “block” files contain the model evaluation over a regular grid over the model extent. The “surfaces” files contain just the bedding surfaces as interpolated from the “block” files using the marching cubes algorithm.

Geological Model geologic maps (geologic_map.tif).

Geologic maps from geological models are standard geotiffs readable by conventional GIS software. The maximum value for each geologic map is the “no-data” value for the map. Geologic maps are calculated at a lower resolution than the topography data for storage efficiency.

Beds Geopackage File (.gpkg).

Geopackage vector data file containing all mapped layers and associated metadata including dip corrected bed thickness as well as WKB encoded 3D linestrings representing the sampled topography data to which the bedding orientations were fit. Geopackage files can be read using GIS software like QGIS and ArcGIS as well as the OGR/GDAL suite. A full description of each column in the file is provided below.

Column
Type
Description

uuid
String
unique identifier

stratum_order
Real
0-indexed bed order

section
Real
section number

layer_id
Real
bed number/index

layer_id_bk
Real
unused backup bed number/index

source_raster
String
dem file path used

raster
String
dem file name

gsd
Real
ground sampling distant for dem

wkn
String
well known name for dem

rtype
String
raster type

minx
Real
minimum x position of trace in dem crs

miny
Real
minimum y position of trace in dem crs

maxx
Real
maximum x position of trace in dem crs

maxy
Real
maximum y position of trace in dem crs

method
String
internal interpolation method

sl
Real
slope in degrees

az
Real
azimuth in degrees

error
Real
maximum error ellipse angle

stdr
Real
standard deviation of the residuals

semr
Real
standard error of the residuals

X
Real
mean x position in CRS

Y
Real
mean y position in CRS

Z
Real
mean z position in CRS

b1
Real
plane coefficient 1

b2
Real
plane coefficient 2

b3
Real
plane coefficient 3

b1_se
Real
standard error plane coefficient 1

b2_se
Real
standard error plane coefficient 2

b3_se
Real
standard error plane coefficient 3

b1_ci_low
Real
plane coefficient 1 95% confidence interval low

b1_ci_high
Real
plane coefficient 1 95% confidence interval high

b2_ci_low
Real
plane coefficient 2 95% confidence interval low

b2_ci_high
Real
plane coefficient 2 95% confidence interval high

b3_ci_low
Real
plane coefficient 3 95% confidence interval low

b3_ci_high
Real
plane coefficient 3 95% confidence interval high

pca_ev_1
Real
pca explained variance ratio pc 1

pca_ev_2
Real
pca explained variance ratio pc 2

pca_ev_3
Real
pca explained variance ratio pc 3

condition_number
Real
condition number for regression

n
Integer64
number of data points used in regression

rls
Integer(Boolean)
unused flag

demeaned_regressions
Integer(Boolean)
centering indicator

meansl
Real
mean section slope

meanaz
Real
mean section azimuth

angular_error
Real
angular error for section

mB_1
Real
mean plane coefficient 1 for section

mB_2
Real
mean plane coefficient 2 for section

mB_3
Real
mean plane coefficient 3 for section

R
Real
mean plane normal orientation vector magnitude

num_valid
Integer64
number of valid planes in section

meanc
Real
mean stratigraphic position

medianc
Real
median stratigraphic position

stdc
Real
standard deviation of stratigraphic index

stec
Real
standard error of stratigraphic index

was_monotonic_increasing_layer_id
Integer(Boolean)
monotonic layer_id after projection to stratigraphic index

was_monotonic_increasing_meanc
Integer(Boolean)
monotonic meanc after projection to stratigraphic index

was_monotonic_increasing_z
Integer(Boolean)
monotonic z increasing after projection to stratigraphic index

meanc_l3sigma_std
Real
lower 3-sigma meanc standard deviation

meanc_u3sigma_std
Real
upper 3-sigma meanc standard deviation

meanc_l2sigma_sem
Real
lower 3-sigma meanc standard error

meanc_u2sigma_sem
Real
upper 3-sigma meanc standard error

thickness
Real
difference in meanc

thickness_fromz
Real
difference in Z value

dip_cor
Real
dip correction

dc_thick
Real
thickness after dip correction

dc_thick_fromz
Real
z thickness after dip correction

dc_thick_dev
Integer(Boolean)
dc_thick <= total mean dc_thick

dc_thick_fromz_dev
Integer(Boolean)
dc_thick <= total mean dc_thick_fromz

thickness_fromz_dev
Integer(Boolean)
dc_thick <= total mean thickness_fromz

dc_thick_dev_bg
Integer(Boolean)
dc_thick <= section mean dc_thick

dc_thick_fromz_dev_bg
Integer(Boolean)
dc_thick <= section mean dc_thick_fromz

thickness_fromz_dev_bg
Integer(Boolean)
dc_thick <= section mean thickness_fromz

slr
Real
slope in radians

azr
Real
azimuth in radians

meanslr
Real
mean slope in radians

meanazr
Real
mean azimuth in radians

angular_error_r
Real
angular error of section in radians

pca_ev_1_ok
Integer(Boolean)
pca_ev_1 < 99.5%

pca_ev_2_3_ratio
Real
pca_ev_2/pca_ev_3

pca_ev_2_3_ratio_ok
Integer(Boolean)
pca_ev_2_3_ratio > 15

xyz_wkb_hex
String
hex encoded wkb geometry for all points used in regression

Geological Model input files (.gpkg).

Four geopackage (.gpkg) files represent the input dataset for the geological models, one per study site as specified in the name of the file. The files contain most  of the columns described above in the Beds geopackage file, with the following additional columns. The final seven columns (azimuth, dip, polarity, formation, X, Y, Z) constituting the actual parameters used by the geological model (GemPy). 

Column
Type
Description

azimuth_mean
String
Mean section dip azimuth 

azimuth_indi
Real
Individual bed azimuth

azimuth
Real
Azimuth of trace used by the geological model

dip
Real
Dip for the trace used by the geological mode

polarity
Real
Polarity of the dip vector normal vector  

formation
String
String representation of layer_id required for GemPy models

X
Real
X position in the CRS of the sampled point on the trace

Y
Real
Y position in the CRS of the sampled point on the trace

Z
Real
Z position in the CRS of the sampled point on the trace

Stratigraphic Column Files (.gpkg).

Stratigraphic columns computed from the Geological Models come in three kinds of Geopackage vector files indicated by the postfixes _sc, rbsc, and rbssc. File names include the wkn site name.

sc (_sc.gpkg).

Geopackage vector data file containing measured bed thicknesses from Geological Model joined with corresponding Beds Geopackage file, subsetted partially. The columns largely overlap with the the list above for the Beds Geopackage but with the following additions

Column
Type
Description

X
Real
X position of thickness measurement

Y
Real
Y position of thickness measurement

Z
Real
Z position of thickness measurement

formation
String
Model required string representation of bed index

bed thickness (m)
Real
difference of bed elevations

azimuths
Real
azimuth as measured from model in degrees

dip_degrees
Real
dip as measured from model in degrees

Dip corrected bed thickness (m)
Real
dip corrected bed thickness in meters

lower_point
Real
lower bed elevation in meters

upper_point
Real
upper bed elevation in meters

_formation
Real
integer number of formation string

layer_iid
Integer64
integer number of layer_id

bascom_baryte_diff_bt
Real
diff. in thickness from geomodel measurements

bascom_baryte_diff_dcbt
Real
diff. in dip cor. thicknesses ’’

rbsc (rbsc.gpkg)

Geopackage vector file containing virtual boreholes with high resolution vertical sampling placed in a regular grid in the spatial extent of the DEM with the following columns.

Column
Type
Description

formation
String
Model required string representation of bed index

pred_z
Real
Z value of bedding plane

layer_id
Integer64
Bed Index from Beds Geopackage file

section
Real
section number

thickness
Real
thickness of the layer predicted by model

geom
Point
contains X,Y,Z of point in dem CRS

rbssc (rbssc.gpkg)

Geopackage vector file containing virtual boreholes with high resolution vertical sampling placed at the centroids for each section within the spatial extent of the DEM with the following columns.

Column
Type
Description

formation
String
Model required string representation of bed index

pred_z
Real
Z value of bedding plane

layer_id
Integer64
Bed Index from Beds Geopackage file

section
Real
section number

thickness
Real
thickness of the layer predicted by model

geom
Point
contains X,Y,Z of point in dem CRS

crescent_shapes.gpkg

Geopackage vector file containing the measurements of the crescent features.

Column
Type
Description

azimuth
Real
Azimuth of the crescent feature in degrees