Maps and Navigation Attributions

1. OSM - Licence/Attribution Guidelines - OpenStreetMap Foundation
   
2. Maps - Mapsforge license
3. Navigation - Valhalla license
4. Elevation Data - Attribution for elevation data
   This has the following:

* ArcticDEM terrain data DEM(s) were created from DigitalGlobe, Inc., imagery and
 funded under National Science Foundation awards 1043681, 1559691, and 1542736; 
* Australia terrain data © Commonwealth of Australia (Geoscience Australia) 2017; 
* Austria terrain data © offene Daten Österreichs – Digitales Geländemodell (DGM) 
 Österreich; 
* Canada terrain data contains information licensed under the Open Government
 Licence – Canada; 
* Europe terrain data produced using Copernicus data and information funded by the
 European Union - EU-DEM layers; 
* Global ETOPO1 terrain data U.S. National Oceanic and Atmospheric Administration 
* Mexico terrain data source: INEGI, Continental relief, 2016; 
* New Zealand terrain data Copyright 2011 Crown copyright (c) Land Information
 New Zealand and the New Zealand Government (All rights reserved); 
* Norway terrain data © Kartverket; 
* United Kingdom terrain data © Environment Agency copyright and/or database
 right 2015. All rights reserved; 
* United States 3DEP (formerly NED) and global GMTED2010 and SRTM terrain data
 courtesy of the U.S. Geological Survey.

attribution.md

Attribution: Attribution is required for many terrain tile data providers. Example language is provided below, but you are responsible for researching each project to follow their license terms. More details are available on the Data Sources page at Mapzen rights for Mapzen's hosted service.
Required attribution:

* ArcticDEM terrain data DEM(s) were created from DigitalGlobe, Inc., imagery and
  funded under National Science Foundation awards 1043681, 1559691, and 1542736; 
* Australia terrain data © Commonwealth of Australia (Geoscience Australia) 2017; 
* Austria terrain data © offene Daten Österreichs – Digitales Geländemodell (DGM)  
  Österreich;

1. Original elevation Data and OSM Attribution requirements - Valhalla Docs
2. Github - valhalla/valhalla: Open Source Routing Engine for OpenStreetMap
3. Europe Elevation data - Sonny's LiDAR Digital Terrain Models of Europe