|Global coverage up to 60N is provided by Shuttle Radar Topography Mission, version 2, data from NASA. It was created in 2000 and has a resolution of 90m.|
|For the USA a higher resolution version of SRTM2 is available. It was created in 2000 and has a resolution of 30m.|
|Global coverage up to 60N is provided by ALOS global digital surface model © JAXA. It was created in 2014 and has a resolution of 30m. |
|High altitude regions such as Greenland, Northern Norway and the Svalbard islands have been created at 90m resolution from mapping by Jonathan de Ferranti||http://viewfinderpanoramas.org/|
|High resolution tiles mapped by plane and drone have resolutions ranging from 1-8m and are added for select areas. Currently UK, New York, Los Angeles, San Francisco, San Diego|
NZ 8m DTM
|Sourced from LINZ. CC-BY 3.0.||http://www.linz.govt.nz/data/licensing-and-using-data/attributing-elevation-or-aerial-imagery-data|
This service uses a variety of digital terrain models (DTM) and digital surface models (DSM) to provide global coverage up to 60N and accuracy of up to 1 metre. If you want to add your own LIDAR see here.