This data is covered by a Creative Commons License (https://creativecommons.org/licenses/by/4.0/) Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), and the following conditions:

1. To cite the data and the Bedmap3 publication in any publication as follows:

DATA:

Pritchard, H., Fretwell, P., Fremand, A., Bodart, J., Kirkham, J., Aitken, A., Bamber, J., Bell, R., Bianchi, C., Bingham, R., Blankenship, D., Casassa, G., Catania, G., Christianson, K., Conway, H., Corr, H., Cui, X., Damaske, D., Damn, V., ... Zirizzotti, A. (2024). BEDMAP3 - Ice thickness, bed and surface elevation for Antarctica - gridding products (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/2d0e4791-8e20-46a3-80e4-f5f6716025d2

PAPER:

Pritchard, H.D., Fretwell, P.T., Fremand, A.C. et al. Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica. Sci Data 12, 414 (2025). https://doi.org/10.1038/s41597-025-04672-y

2. The user recognizes the limitations of data. Use of the data is at the users'' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data.

This data is covered by a Creative Commons License (https://creativecommons.org/licenses/by/4.0/) Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), and the following conditions:

1. To cite the data and the Bedmap3 publication in any publication as follows:

DATA:

Pritchard, H., Fretwell, P., Fremand, A., Bodart, J., Kirkham, J., Aitken, A., Bamber, J., Bell, R., Bianchi, C., Bingham, R., Blankenship, D., Casassa, G., Catania, G., Christianson, K., Conway, H., Corr, H., Cui, X., Damaske, D., Damn, V., ... Zirizzotti, A. (2024). BEDMAP3 - Ice thickness, bed and surface elevation for Antarctica - gridding products (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/2d0e4791-8e20-46a3-80e4-f5f6716025d2

PAPER:

Pritchard, H.D., Fretwell, P.T., Fremand, A.C. et al. Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica. Sci Data 12, 414 (2025). https://doi.org/10.1038/s41597-025-04672-y

2. The user recognizes the limitations of data. Use of the data is at the users'' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data.

All the grids have a cell size of 500m in the WGS 1984 Antarctic Polar Stereographic projection (EPSG:3031). Some specific quality control checks and corrections (e.g. negative height relative to sea level for ''sea'' cells while ''non-sea'' cells have positive values) have been undertaken and are extensively described in the associated paper (Pritchard et al.).

The uncertainty grids have been calculated through error budgets based upon a combination of published uncertainties and our own tests of accuracy and precision. The input datasets inherently have uncertainties with differing statistical distributions, and not all are well known. Furthermore, most Bedmap3 cells have values that are interpolated between sparse observations, and the uncertainties in this process are also difficult to quantify. Our uncertainties are therefore a best estimate based on the available evidence, given to approximately the 1-sigma level.