NASA Mars Relief

_images/nasa-logo-web-rgb.png
_images/GMT_mars_relief.jpg

Usage

You access the global MOLA relief grid by specifying the special name

@mars_relief[_rru[_reg]]

This grid contains observed relief measured via altimetry. The following codes for the optional rru and reg are supported (dimensions are listed for pixel-registered grids; gridline-registered grids increment dimensions by one):

NASA Mars (MOLA) Relief. An asterisk denotes tiled datasets.

Code

Dimensions

Reg

Size

Description

01d

360 x 180

g,p

109 KB

1 arc degree Mars relief (MOLA @ 168 km)

30m

720 x 360

g,p

373 KB

30 arc minute Mars relief (MOLA @ 84 km)

20m

1080 x 540

g,p

781 KB

20 arc minute Mars relief (MOLA @ 56 km)

15m

1440 x 720

g,p

1.3 MB

15 arc minute Mars relief (MOLA @ 42 km)

10m

2160 x 1080

g,p

2.8 MB

10 arc minute Mars relief (MOLA @ 28 km)

06m

3600 x 1800

g,p

7.5 MB

6 arc minute Mars relief (MOLA @ 17 km)

05m*

4320 x 2160

g,p

11 MB

5 arc minute Mars relief (MOLA @ 16 km)

04m*

5400 x 2700

g,p

16 MB

4 arc minute Mars relief (MOLA @ 11 km)

03m*

7200 x 3600

g,p

28 MB

3 arc minute Mars relief (MOLA @ 8.4 km)

02m*

10800 x 5400

g,p

61 MB

2 arc minute Mars relief (MOLA @ 5.6 km)

01m*

21600 x 10800

g,p

228 MB

1 arc minute Mars relief (MOLA @ 2.8 km)

30s*

43200 x 21600

g,p

822 MB

30 arc second Mars relief (MOLA @ 1.4 km)

15s*

86400 x 43200

g,p

2.7 GB

15 arc second Mars relief (MOLA @ 0.7 km)

12s*

106694 x 53347

p

3.1 GB

12.14… arc second Mars relief (MOLA original)

See GMT remote dataset usage for when resolution codes are optional or required. All of these data will, when downloaded, be placed in your ~/.gmt/server directory, with the mars_relief files being placed in an mars/mars_relief sub-directory. If you do not specify a CPT then the default CPT for this dataset (the GMT master @mars_relief CPT) will be used.

Technical Information

As you see, the 01m and lower resolutions are all derivatives of USGS’ 12.1468873601 arc-second Mars_HRSC_MOLA_BlendDEM_Global_200mp_v2.tif (Neumann_et_al., 2003). We have downsampled it via Cartesian Gaussian filtering to prevent aliasing while preserving the latitude-dependent resolution in the original 12.1468873601 arc sec grid. The full (6 sigma) filter-widths are indicated in parenthesis. Almost all grids are available in both gridline- and pixel-registered formats except the original pixel-registered grid at 12.1468873601 arc-seconds resolution (here called @mars_relief_12s). Data resolution is 0.5 meter.

Data References

  1. MOLA: [https://doi.org/10.1029/2000JE001426/abstract].