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Michelle Hu edited this page Jun 19, 2019 · 29 revisions

Topohack 2019

Taking ICESat-2 to the mountains: a workflow using satellite laser altimetry to resolve topography over complex terrain

Background

Objectives

  • Create simplified workflow to extract ICESat-2 ATL06 data
  • Compare elevation profiles from ICESat-2 ATL06 products over complex terrain with existing high-resolution DEM datasets
  • Compare Snow-off DEM over Grand Mesa with winter (October to February) IceSat-2 collects.

Goals and Agenda

Monday

  • Explore OpenAltimetry and utility with multiple locations and time periods (All)

Tuesday

  • Introductions (All)
  • Practice collaborating with git (All)
  • Add and present utility to download validation data staged with Google Drive storage (Friedrich)
  • Create distilled example of data-access tutorial (Michelle)
  • Discuss general objectives (All)

Wednesday

  • Checkin and touch base on objectives for the day/week (All)
  • Organize individual folders into a single folder (All)
  • Merge all open pull requests (All)
  • Make sure everyone is up to date with the latest changes (All)
  • Work with data-access notebooks to download ICESat-2 data using spatial and temporal filters (All)
  • Explore and understand ATL06 variables, flags, and theoretical basis (All)
  • Learn how to subset ATL06 data based on flags using tutorial notebooks (All)
  • Start creating a python library to make it easier to download by spatial and temporal filters (Joe)
  • Work with HDF5 files as xarray datasets and/or geopandas/shapely polygons ( )
  • Compare profile of ATL06 latitude, longitude, h_li to elevations extracted from WADNR lidar DEM over Mt Baker, Washington (Friedrich)
  • Get classified map of Grand Mesa from WorldView imagery, download ATL03 and ATL08 data for comparison (Michelle)

Thursday

  • Evaluate/Compare the topography resolved by ICESat-2 profiles along steep mountains with topographic profiles returned from high-resolution DEMs.
  • Get a sense of snow accumulation (depth) by comparing Snow-off DEM over Grand Mesa with winter (October to February) IceSat-2 collects.

Friday

  • Summarize progress and next steps

Study Sites and Objectives (as converged on Wednesday)

  • Mt. Baker (Friedrich)
  • Grand Mesa (Michelle/HP)
  • ARTIC DEM (Will)
  • HMA (All points within glaciers, plot the distribution) (Vibhor)
  • Data Filtering (Justin/Mariama)
  • US (Comparison with NED) (Amy)
  • Improve profiling code, chip in any geospatial problem in general (Shashank)
  • Clean functions, make everything usable by all (Joe)

Might be nice or useful...

  • Intersect ICESat-2 data with RGI glacier polygons to get a sense of bare ground coverage near glaciers.
  • Generate DEM for GM using ASP and compare with ATL06

Methods/Planned Approach

Tools/Libraries

numpy
scipy
rasterio
pandas
geopandas

Collaborators

Vibhor Agarwal
Michelle Hu
Friedrich Knuth
HP Marshall
Justin Pflug
Mariama Dryak
Will Kochtitzky

Team Lead:

Shashank Bhushan

Data Science Leads:

Joe Meyer
Amy Steicker

References

ATL06 technical references

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