Am 04.07.2009 um 08:04 schrieb Christian Gawron:
A very good hint. The understanding of all discussions on the matter is that the current OSM licence does not allow mixing with CIAT data nor with ASTER data. So you cannot publish those maps. Could you elaborate on this? I would understand that e.g. the license of the ASTER data forbids publishing of derived work (although I haven't checked this). But is there really a point in the OSM license which forbids creating derived works (maps) which as an "add-on" contain features created from proprietary data sources?
Yes it is. See the section "I created a layer on top of an OSM map. What do I have to put under your license?" from http://wiki.openstreetmap.org/wiki/Common_licence_interpretations : -- You have to determine whether what you have created is a Collective Work or a Derivative work, under the terms of the OSM licence. • If what you create is based on OSM data (for example if you create a new layer by looking at the OSM data and refering to locations on it) then it is likely you have created a derivative work. • If you generate a merged work with OSM data and other data (such as a printed map or pdf map) where the non-OSM data can no longer be considered to be separate and independent from the OSM data, is is likely you have created a derivative work. • If you overlay OSM data with your own data created from other sources (for example you going out there with a GPS receiver) and the layers are kept separate and independent, and the OSM layer is unchanged, then you may have created a collective work. If you have created a derivative work, the work as a whole must be subject to the OSM licence. If you have created a collective work, then only the OSM component of the work must be subject to the OSM licence. -- So especially with your solution to integrate the contour lines into the map this is IMHO a derivative work, so that all components of it must be subject to the OSM license. Regards Thilo