The ODbL does not require any particular license for maps produced from ODbL data. Prior to 1 August 2020, map tiles produced by the OpenStreetMap Foundation were licensed under the CC-BY-SA-2.0 license. Maps produced by other people may be subject to other licences.Open Database LicenseODbLhttp://opendatacommons.org/licenses/odbl/1.0/true
Source:
OpenTopoMap using OpenStreetMap data
This work contains information from OpenStreetMap, which is made available under the Open Database License (ODbL)
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.