Method for Crater Detection From Martian Digital Topography.
Sample:
After looking through the codebook for the Mars Crater, I am particularly interested in Crater diameter, depth, and its distribution dependence.
Impact craters are arguably the primary exogenic planetary process contributing to the surface evolution of solid bodies in the solar system.
Craters appear across the entire surface of Mars, and they are vital to understanding its crustal properties as well as surface ages and modification events. They allow inferences into the ancient climate and hydro-logic history, and they add a key data point for the understanding of impact physics
While Crater diameter, depth, and its distribution dependence is a good starting point, one needs to determine what it is about crater diameter, depth & distribution dependence that’s interesting.
So basically, I am interested in the exploring the depth & diameter of the craters on the Martian surface & its association with the number of layers a crater has.
Data Collection procedure:
Method for Crater Detection From Martian Digital Topography Data Using Gradient Value/Orientation, Morphometry, Vote Analysis, Slip Tuning, and Calibration. So basically the the data involving mars crater is an observational data collected in the process.
The variable which could basically reflect the crater distribution in Martian surface is –
CRATER_ID – crater ID for internal use, based upon the region of the planet (1/16ths), the “pass” under which the crate was identified, and the order in which it was identified
LATITUDE_CIRCLE_IMAGE – latitude from the derived center of a nonlinear least-squares circle fit to the vertices selected to manually identify the crater rim (units are decimal degrees North)
LONGITUDE_CIRCLE_IMAGE – longitude from the derived center of a nonlinear least-squares circle fit to the vertices selected to manually identify the crater rim (units are decimal degrees East)
DIAM_CIRCLE_IMAGE – diameter from a nonlinear least squares circle fit to the vertices selected to manually identify the crater rim (units are km)
DEPTH_RIMFLOOR_TOPOG – average elevation of each of the manually determined N points along (or inside) the crater rim (units are km.
Depth Rim -‐ Points are selected as relative topographic highs under the assumption they are the least eroded so most original points along the rim
Depth Floor – Points were chosen as the lowest elevation that did not include visible embedded craters
NUMBER_LAYERS – the maximum number of cohesive layers in any azimuthal direction that could be reliably identified and how is it associated with the NUMBER_LAYERS