get_opentopo

This function uses the Open Topography SRTM Version 3 files.

internal

Several web services are available that provide access to elevation
data. This package provides access to many of those services and
returns elevation data either as an 'sf' simple features object
from point elevation services or as a 'raster' object from raster
elevation services. In future versions, 'elevatr' will drop
support for 'raster' and will instead return 'terra' objects.
Currently, the package supports access to the Amazon Web Services
Terrain Tiles <https://registry.opendata.aws/terrain-tiles/>,
the Open Topography Global Datasets
API <https://opentopography.org/developers/>, and the USGS
Elevation Point Query Service <https://apps.nationalmap.gov/epqs/>.

Jeffrey W Hollister

elevatr

Access Elevation Data from Various APIs

Jeffrey Hollister

Tarak Shah

Jakub Nowosad

Alec L. Robitaille

Marcus W. Beck

Mike Johnson

get_opentopo function

<dl><dt>locations</dt>
<dd>Either a <code>data.frame</code> of x (long) and y (lat), an 
<code>sp</code>, an <code>sf</code>, or <code>raster</code> object as input.</dd>
<dt>prj</dt>
<dd>A valid input to <code>st_crs</code> If a <code>sf</code> 
object or a <code>terra</code> object is provided as the <code>locations</code>, 
the prj is optional and will be taken from <code>locations</code>. This 
argument is required for a <code>data.frame</code> of locations.</dd>
<dt>expand</dt>
<dd>A numeric value of a distance, in map units, used to expand the
bounding box that is used to fetch the SRTM data.</dd>
<dt>...</dt>
<dd>Extra configuration parameters to be passed to httr::GET. Common 
usage is to adjust timeout. This is done as 
<code>config=timeout(x)</code> where <code>x</code> is a numeric value in 
seconds. Multiple configuration functions may be passed as a 
vector.</dd></dl>

Arguments

Get a digital elevation model from the Open Topography SRTM Version 3 — get_opentopo

<dl>

<dt>locations</dt>
<dd>Either a <code>data.frame</code> of x (long) and y (lat), an 
<code>sp</code>, an <code>sf</code>, or <code>raster</code> object as input.</dd>


<dt>prj</dt>
<dd>A valid input to <code>st_crs</code> If a <code>sf</code> 
object or a <code>terra</code> object is provided as the <code>locations</code>, 
the prj is optional and will be taken from <code>locations</code>. This 
argument is required for a <code>data.frame</code> of locations.</dd>


<dt>expand</dt>
<dd>A numeric value of a distance, in map units, used to expand the
bounding box that is used to fetch the SRTM data.</dd>


<dt>...</dt>
<dd>Extra configuration parameters to be passed to httr::GET. Common 
usage is to adjust timeout. This is done as 
<code>config=timeout(x)</code> where <code>x</code> is a numeric value in 
seconds. Multiple configuration functions may be passed as a 
vector.</dd>

</dl>

get_opentopo: Get a digital elevation model from the Open Topography SRTM Version 3

Description

Usage

Arguments