Antarctic Ice Velocity Data

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VELMAP: Contributions Sought

So you've got some ice velocity data and you're wondering whether or how to contribute it to the community? Here are some considerations and guidelines related to contributing to VELMAP:

  1. Please contact us at
    After that, here is a general checklist of some things that we'll eventually need:

  2. Citation of Published Article
    We would like to be able to cite a publication about the data, no matter how obscure the journal.

  3. Description of Measurement Techniques
    Each dataset should have a detailed description of how the measurements were made. This descriptive text can usually be created from existing text from your publications. Alternatively, you could send us a rough draft with all the information in it, and we'll neaten it up for the web site.

  4. Error Sources
    The dominant sources of error should be identified. Possible examples include: uncertainty in survey pole tilt when top-of-pole measurement is made; GPS measurement uncertainties; uncertainty in determining peak in cross-correlation surface when comparing multitemporal satellite imagery.

  5. Error Estimates
    Estimates of uncertainty for each primary measurement should be given. If a set of measurements has one uncertainty that applies to all measurements in the set, then that can be stated in the descriptive text. Most velocities are computed from multitemporal position measurements; the time between measurements (and its uncertainty, if applicable) is also desired.

  6. Releasability
    A couple of investigators have sent us data with the request that we not make them public for a specified time. We can accept data from you and hold it in confidence, if you tell us how long this "proprietary period" will be in effect.

Other Considerations

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$Date: 2000-12-05 14:39:29-07 $