Several web services are available that provide access to elevation data. This package provides access to several of those services and returns elevation data either as a SpatialPointsDataFrame from point elevation services or as a raster object from raster elevation services. Currently, the package supports access to the Amazon Web Services Terrain Tiles < https://aws.amazon.com/public-datasets/terrain/> and the USGS Elevation Point Query Service < http://ned.usgs.gov/epqs/>.
elevatr package currently provides access to elevation data from AWS Open Data Terrain Tiles for raster digital elevation models. For point elevation data,the USGS Elevation Point Query Service) may be used or the point elevations may be derived from the AWS Tiles. Additional elevation data sources may be added.
Currently this package includes just two primary functions to access elevation web services:
get_elev_point(): Get point elevations using the USGS Elevation Point Query Service (for the US Only) or using the AWS Terrian Tiles (global). This will accept a data frame of x (long) and y (lat), a SpatialPoints/SpatialPointsDataFame, or a Simple Features object as input. A SpatialPointsDataFrame or Simple Features object is returned, depending on the class of the input locations.
get_elev_raster(): Get elevation data as a raster (e.g. a Digital Elevation Model) from the AWS Open Data Terrain Tiles. Other sources may be added later. This will accept a data frame of of x (long) and y (lat) or any
rasterobject as input and will return a
rasterobject of the elevation tiles that cover the bounding box of the input spatial data.
Version 0.2.0 of this package is currently available from CRAN and may be installed by:
The development version (this repo) may installed with
Mapzen terrain tiles (which supply the AWS source) contain 3DEP, SRTM, and GMTED2010 content courtesy of the U.S. Geological Survey and ETOPO1 content courtesy of U.S. National Oceanic and Atmospheric Administration.
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