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# Planetary Geologic Mapping: the Vesta Snowman Geospatial Dataset
## Alessandro Frigeri<sup>1</sup>, Katrin Stephan<sup>2</sup>, Roland Wagner<sup>2</sup>
__<sup>1</sup>Istituto di Astrofisica e Planetologia Spaziali (IAPS), Istituto Nazionale di Astrofisica (INAF), Rome, Italy__ \
__<sup>2</sup>German Aerospace Center - DLR, Berlin, Germany__
This package contain the dataset for the geologic mapping of a region of asteroid Vesta named 'The Snowman'.
The dataset includes a QGUS project, and has been tested on __QGIS version 3.34.2__.
GIS data lauers include data from the NASA/Dawn mission to Vesta and Ceres:
* NASA/Dawn/FC: image mosaic basemaps
* NASA/Dawn/FC: topographic basemap
* NASA/Dawn/FC: color map (RBG)
* NASA/Dawn/VIR: spectral indexes for band center and depths for the pyroxene absorption bands
{height=600px}
The snowman is a set of three craters, nicknamed "Snowman" by the NASA/Dawn Framing Camera's team members. TIt is located in the northern hemisphere of Vesta and the two larger craters are about 40 kilometers across.
This dataset includes basemaps and data to do develop a geologic mapping project over the _Snowman_ region of Vesta.
The __coordinate reference system (CRS)__ for this data set is the [IAU_2015:20000041](https://spatialreference.org/ref/iau_2015/200000410/), indicating a [simple cylindrical projection](https://en.wikipedia.org/wiki/Equirectangular_projection) over a sphere with 255 km of radius.
Within the dataset, an exercise on geologic mapping is provided as contacts, linear and punctual features, as well as style file for coding the geologic units. The geologic mapping exercise is based upon the map published in Williams et al., 2014 (see reference below).
This "Vesta Snowman dataset" is licensed under CC-BY-SA-4.0 international license. This license enables reusers to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use. If you remix, adapt, or build upon the material, you must license the modified material under identical terms: BY: credit must be given to the creator. SA: Adaptations must be shared under the same terms.
You can cite this dataset as:
* Frigeri, A., Stephan, K., & Wagner, R. (2024). The Vesta Snowman Geologic Mapping Geospatial Dataset [Data set]. Zenodo. https://doi.org/10.5281/zenodo.10519733
## References
* De Sanctis, M.C., Combe, J.-P., Ammannito, A., Frigeri, A., Longobardo, A., Palomba, E., Tosi, F., Zambon, F., Stephan, K., Raymond, C.A., Russell, C.T., 2015. Eucritic crust remnants and the effect of in-falling hydrous carbonaceous chondrites characterizing the composition of Vesta's Marcia region. ıcarus 259, 91–115. https://doi.org/10.1016/j.icarus.2015.05.014
* Frigeri, A., De Sanctis, M.C., Ammannito, E., Tosi, F., Longobardo, A., Zambon, F., McCord, T., Combe, J.P., Jaumann, R., Raymond, C.A., Russell, C.T., 2015. The spectral parameter maps of Vesta from VIR data. Icarus 259, 10–20. https://doi.org/10.1016/j.icarus.2015.06.027
* Skinner Jr., J.A., Huff, A.E., Black, S.R., Buban, H.C., Fortezzo, C.M., Gaither, T.A., Hare, T.M., Hunter, M.A., 2022. Planetary geologic mapping protocol—2022 (Report No. 11-B13), Techniques and Methods. U. S. Geological Survey, Reston, VA. https://doi.org/10.3133/tm11B13
* Williams, D.A., Denevi, B.W., Mittlefehldt, D.W., Mest, S.C., Schenk, P.M., Yingst, R.A., Buczkowski, D.L., Scully, J.E.C., Garry, W.B., McCord, T.B., Combe, J.-P., Jaumann, R., Pieters, C.M., Nathues, A., Le Corre, L., Hoffmann, M., Reddy, V., Schäfer, M., Roatsch, T., Preusker, F., Marchi, S., Kneissl, T., Schmedemann, N., Neukum, G., Hiesinger, H., De Sanctis, M.C., Ammannito, E., Frigeri, A., Prettyman, T.H., Russell, C.T., Raymond, C.A., 2014. The geology of the Marcia quadrangle of asteroid Vesta: Assessing the effects of large, young craters. Icarus 244, 74-88. https://doi.org/10.1016/j.icarus.2014.01.033