# stars v0.0

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## Scalable, Spatiotemporal Tidy Arrays for R

Support for Scalable, Spatiotemporal Arrays in R, using GDAL bindings.

# stars: spatiotemporal tidy arrays for R

Spatiotemporal data often comes in the form of dense arrays, with space and time being array dimensions. Examples include

• socio-economic or demographic data,
• environmental variables monitored at fixed stations,
• time series of satellite images with multiple spectral bands,
• spatial simulations, and
• climate model results.

Currently, R does not have infrastructure to handle and analyse such arrays easily. Package raster is probably still the most powerful package for handling this kind of data in memory and on disk, but does not address non-raster time series, rasters time series with multiple attributes, rasters with mixed type attributes, or spatially distributed sets of satellite images.

This project will not only deal with these cases, but also extend the "in memory or on disk" model to that where the data are held remotely in cloud storage, which is a more feasible option e.g. for satellite data collected Today. We will implement pipe-based workflows that are developed and tested on samples before they are evaluated for complete datasets, and discuss the challenges of visualiasation and storage in such workflows.

## Proposal

### Acknowledgment

This project is being realized with financial support from the

## Functions in stars

 Name Description st_xy2sfc replace x y raster dimensions with simple feature geometry list (points or polygons) stars_extSoftVersion Provide the external dependencies versions of the libraries linked to stars st_read_crs read coordinate reference system from GDAL data set st_stars read raster/array dataset from file or connection reexports Objects exported from other packages st_dimensions get dimensions from stars object gdal_utils Native interface to gdal utils get_get_metadata get metadata of a raster layer gdal_crs read coordinate reference system from GDAL data set st_as_stars convert objects into a stars object as Coerce stars object into a Raster raster or brick dplyr dplyr verbs for stars objects st_transform.stars transform features, or warp/resample grids in stars objects to a new coordinate reference system st_transform transform features, or warp/resample grids in stars objects to a new coordinate reference system plot.stars plot stars object, with subplots for each level of first non-spatial dimension No Results!