dem files for Antarctic maps and data analysis

We use BedMachine Antarctica v2, 1km resolution [https://nsidc.org/data/nsidc-0756/versions/2](https://nsidc.org/data/nsidc-0756/versions/2) (to be updated one day to v3, see below) to: * estimate the surface elevation of observation when not available: [BedMachineAntarctica_v02.nc](./data/dem/BedMachineAntarctica_v02.nc) * generate lower resolution maps of Antarctica for plots: e.g. at 10km, [ANT10km_BedMachineAntarctica_v02.nc](./data/dem/ANT10km_BedMachineAntarctica_v02.nc)You can load this data in the [./data/dem](./data/dem) from the> [!IMPORTANT]> Do not forget to cite the following articles when using this script>> #### Data Citation and Acknowledgment> As a condition of using these data, you must cite the use of this data set. Such a practice gives credit to data set producers and advances principles of transparency and reproducibility.>> * Morlighem, M. (2020). MEaSUREs BedMachine Antarctica. (NSIDC-0756, Version 2). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/E1QL9HFQ7A8M. [describe subset used if applicable]. Date Accessed 11-13-2024.>> When using this data product in a publication, please include the following citations in addition to the data product citation provided above:>> * Morlighem, M., Rignot, E., Binder, T., Blankenship, D. D., Drews, R., Eagles, G., Eisen, O., Ferraccioli, F., Forsberg, R., Fretwell, P., Goel, V., Greenbaum, J. S., Gudmundsson, H., Guo, J., Helm, V., Hofstede, C., Howat, I., Humbert, A., Jokat, W., Karlsson, N. B., Lee, W., Matsuoka, K., Millan, R., Mouginot, J., Paden, J., Pattyn, F., Roberts, J. L., Rosier, S., Ruppel, A., Seroussi, H., Smith, E. C., Steinhage, D., Sun, B., van den Broeke, M. R., van Ommen, T., van Wessem, M. & Young, D. A.. 2020. Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet. Nature Geoscience. 13. DOI: 10.1038/s41561-019-0510-8.>> To promote open science principles and reproducibility, we encourage you to make your data citation specific to the subset used in your research. Common examples of information include spatial and temporal range and file types if relevant.You can load your favorite dem for Antarctica in [./data/dem](./data/dem):* The dem should be in the Spatial Reference System "Antarctic Polar Stereographic EPSG:3031"* E.g. the last version of BedMachine Antarctica: https://nsidc.org/data/nsidc-0756/