Packages

srtm

0.5.0
0.8.0 0.7.0 0.6.0 0.5.2 0.5.1 0.5.0 0.4.0 0.3.0 0.2.0 0.1.2 0.1.1 0.1.0

A small library that provides a simple interface to query locations on the earth for elevation data from the NASA Shuttle Radar Topography Mission (SRTM)

HexDocs

Current section

Files

Jump to
Readme
12 Versions
4 Dependencies
Dependants
Files
Activity
srtm lib source cache.ex
Raw

lib/source/cache.ex 

defmodule SRTM.Source.Cache do

  use SRTM.Source

  @moduledoc false



  alias SRTM.Client



  @impl true

  def fetch(%Client{cache_path: cache_path}, {lat, lng}) do

    hgt_path = Path.join([cache_path, name(lat, lng) <> ".hgt"])



    if File.exists?(hgt_path) do

      {:ok, hgt_path}

    else

      {:error, :not_loaded}

    end

  end

end