get_mapzen_elev

<p>A valid Mapzen API key.  Although not required by the API, the
rate limits are low without a key.  The <code>elevatr</code> package
requires a key.  To get a key, visit 
<a href="https://mapzen.com/developers">https://mapzen.com/developers</a>. Defaults to 
<code>Sys.getenv("mapzen_key")</code>.</p>

api_key

internal

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
Mapzen Elevation Service <https://mapzen.com/documentation/elevation/elevation-service/>,
Mapzen Terrain Service <https://mapzen.com/documentation/terrain-tiles/>,
Amazon Web Services Terrain Tiles <https://aws.amazon.com/public-datasets/terrain/> and the USGS
Elevation Point Query Service <http://ned.usgs.gov/epqs/>.

Jeffrey W Hollister

elevatr

Access Elevation Data from Various APIs

Jeffrey Hollister

Tarak Shah 

get_mapzen_elev function

<p>A valid Mapzen API key.  Although not required by the API, the
rate limits are low without a key.  The <code>elevatr</code> package
requires a key.  To get a key, visit 
<a href='https://mapzen.com/developers'>https://mapzen.com/developers</a>. Defaults to 
<code>Sys.getenv("mapzen_key")</code>.</p>

get_mapzen_elev: Get point elevations from Mapzen

Description

Usage

Arguments