Different steps need to be followed depending on the existence or not in O-City World platform of the city where the natural or cultural heritage that promotes the multimedia is set.

After having decided which multimedia are appropriate in terms of content and quality to be uploaded to O-City World platform, the teacher has to:

1. Check if the heritage that promotes the multimedia is registered in O-City World platform (it should because there is a proposed activity for this). If not, propose the heritage.
2. Register as a creator user. This user will be able to upload multimedia items and evaluate the work of his own students.
3. Upload the item using the Content menu. The teacher has to specify the name of the authors of the item.
4. Once the item has been uploaded, a validator (from the municipality) will review it and publish in the platform if it is of adequate quality.

In this case, some steps need to be done before being able to upload the multimedia:

1. Search for a University or a cultural/educational organization at regional level and ask them to collaborate with O-City project. This organization will be able to create cities in the O-City World platform and to assign people responsible for the content of these cities in the platform (validators)
2. The University or regional organization has to send a letter of invitation to the mayor of the city to request his/her permission to incorporate the city to the platform. A template for the letter of invitation is included in Annex III. As this can be a long process, especially in big cities, you can continue with step 3.
3. Register as a creator user. This user will be able to upload multimedia items and evaluate the work of his own students.
4. Upload the item using the Content menu. The teacher has to specify the name of the authors of the item.

Once the item has been uploaded, a validator will review it and publish it in the platform if it is of adequate quality.

This is the letter that O-City.org needs for a city to appear on the map of the world of cities.  Although in this model it is the leading university of the project that requests the mayor of the city to include it in O-City, in most cases it will be a regional university, close to the city, that sends the letter of invitation. If so, please substitute the name of the university with the appropriate one.

It is possible to start operating in O-City without the signed letter, but it is advisable to have it, since all the heritage items that appear on the map will be managed by the city council.