README.md

In markusdumke/altituder: Query Altitude (Elevation) Data From APIs

altituder

An R package to get altitude (elevation) data from several APIs.

Installation

You can install the development version of altituder from Github via:

# install.packages("devtools")
devtools::install_github("markusdumke/altituder")

get_altitude

Currently there is only one function get_altitude, which queries altitude data for given locations.

library(altituder)
get_altitude(.longitude = 11, .latitude = 48)
#> [1] 647

# Input is a data.frame
get_altitude(.Data = data.frame(longitude = 10:12, latitude = 48:50))
#> [1] 650 528 777

Which API can be specified via the .src argument. Currently supported are:

• geonames: Uses the geonames webservice. The number of free requests is limited, for a higher rate, register and pass your username to this function. Check usage terms at [http://www.geonames.org/export/web-services.html].
• google: Uses the Google Elevation API. You need to pass your API key. Costs can apply. Check usage terms at [https://developers.google.com/maps/documentation/elevation/usage-and-billing].
• openelevation: Uses free Open-Elevation API. See [https://github.com/Jorl17/open-elevation].
• racemap: Uses free Racemap API. Based on mapzen terrain data. See [https://github.com/racemap/elevation-service].

# Set API key via environment variable
# Warning: Costs may apply!
get_altitude(.longitude = 11, .latitude = 48, 
             .src = "google", .google.api.key = Sys.getenv("GOOGLE_API_KEY"))
#> [1] 648

markusdumke/altituder documentation built on May 31, 2019, 1:51 a.m.