USGS - science for a changing world

geoknife - Introduction

Lesson Summary

This lesson will explore how to find and download large gridded datasets via the R package geoknife. The package was created to allow easy access to data stored in the Geo Data Portal (GDP), or any gridded dataset available through the OPeNDAP protocol DAP2. geoknife refers to the gridded dataset as the fabric, the spatial feature of interest as the stencil, and the subset algorithm parameters as the knife (see below).

figure illustrating definitions of fabric, stencil, and knife

Lesson Objectives

Explore and query large gridded datasets for efficient and reproducible large-scale analyses.

By the end of this lesson, the learner will be able to:

  1. Explain the differences between remote and local processing.
  2. Differentiate the three main concepts of this package: fabric, stencil, and knife.
  3. Use this package to retrieve pre-processed data from the Geo Data Portal (GDP) via geoknife.

Lesson Resources

Lindsay R. Carr