<div class="gmail_quote">On Tue, Mar 3, 2009 at 2:13 PM, OJ W <span dir="ltr"><<a href="mailto:ojwlists@googlemail.com">ojwlists@googlemail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
except that the ODbL does represent a fundamental change in licensing<br>
of map images - previously they were sharealike, but with ODbL it will<br>
only require attribution?</blockquote><div><br>That is hos the license is understood by most people, yes. Some questions on the final wording are still outstanding, as you have probably seen.<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
This could potentially alienate anyone who wonders why they are doing<br>
surveying for free so that cartographers can sell all-rights-reserved<br>
map images based on their data.<br>
</blockquote></div><br>It could, potentially, even if I agree with Richard. I think it is important to explain why this change is to the better in the majority of the cases.<br><br>It is no longer possible to make massive amendments to the OSM data set, make a mp of this and not share the data. Previously, you had to share the map image, including design elements like pictograms, but to get the updated map data into the database again, someone would have to to georectification of the map and trace the changes.<br>
<br>With the ODbL, the image of the map does not have to be free, but the data have to be shared. This means that the design elements are proprietary, but the data are easily available.<br><br>This also opens up uses where you can combine data sources with different licenses. One example could be digital elevation models combined with data from OSM, to make a good hiking map.<br>
<br>Two examples:<br><br>I want to make a map of Copenhagen, with some good beer pubs. I am a lousy artist, and would like to grab some pictograms from <a href="http://istockphoto.com">istockphoto.com</a> to make a good looking map. This is not possible today, and the map will lack good pictograms. I will also be adding some extra pubs and other information which is not in the database today. If anyone want to add this extra information to the database, so they will be available for other users, they will have to do this manually and the project gains very little.<br>
<br>Cloudmade and Geofabrik have some nice looking stylesheets that I would like to base the above map on. Even if the map tiles are available to me, they are little of no use to me. I will need to customize some things, like rendering of pubs and restaurants, and cannot use the tiles directly. The share alike properties of these images is not worth very much to me.<br>
<br><br>I think the bottom line here, is that the _data_ are very much more valuable than any image made with them.<br><br> - Gustav<br><br><br>