Notebooks for working with Greenland Ice Mapping Project (GIMP) data archived at NSIDC
These notebooks can run locally on a users own machine or cloud resource, but users can also run them remotely free of charge as a binder app. Advantages to binder are:
- The notebook runs in a well-test, pre-configured environment,
- No need to setup on your own machine.
There are some limitations to binder:
- The binder instances are limited to 2GB of memory, which can easily be exceeded if too large a region is or too many products are selected.
- The binder instance will time out after an ten minutes of inactivity, and all work will be lost. Keeping the notebook in the foreground while it runs should avoid a timeout.
To run the notebooks, click on the launchbinder button at the top of this file.
This notebook creates a cookie file and .netrc file with authentication information that GDAL based programs (e.g., other Notebooks in this repo and QGIS) can download /vsicurl links to allow remote access of data archive at NSDIC. The notebook contains full setup instructions. Users should view the notebook on github before trying to run.
The directions for setup are contained in the notebook, so its a good idea to read the github rendered notebook before proceeding.
This notebook has a search tool to search for GIMP products at NSIDC. Following the search, the result can automically be incorporated in a new QGIS project that accesses the data remotely. It can also group and save the data as QGIS Layer Definition Files, which allow subsets of the data to easily be imported into an existing QGIS project.
This notebook allows users to download subsets of GIMP image (NSIDC-0723) and velocity (NSIDC-481, 0725, 0727, 0731) data. For the Sentinel based velocity mosaics (0725, 0727, 0731), the user can select a box on a map and select which components to be downloaded (vv, vx, vy, ex, ey, dT) and saved to a netCDF file. Once the download is complete, users can explore the data by interactively selecting points that are plotted as time series. In the case of the TSX products (NSDIC-0481), given their small size, the full product "box" is downloaded. Because of the sparse nature of these boxes, only the the products associated with a single box can be downloaded at a time.
These notebooks rely on http network transfers, which can be flaky. So for some crashes, you need not be crazy to repeat the same procedure over and over and expect a different result (at least not for the first few tries).