# City history animations## Copyright and copyleftCopyright (C) 2021Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum GFZThis program is free software: you can redistribute it and/or modify itunder the terms of the GNU Affero General Public License as published bythe Free Software Foundation, either version 3 of the License, or (atyour option) any later version.This program is distributed in the hope that it will be useful, butWITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU AfferoGeneral Public License for more details.You should have received a copy of the GNU Affero General Public Licensealong with this program. If not, see http://www.gnu.org/licenses/.Also add information on how to contact you by electronic and paper mail.If your software can interact with users remotely through a computernetwork, you should also make sure that it provides a way for users toget its source. For example, if your program is a web application, itsinterface could display a "Source" link that leads users to an archiveof the code. There are many ways you could offer source, and differentsolutions will be better for different programs; see section 13 for thespecific requirements.See the LICENSE for the full license text.