I have a love/hate relationship with Yahoo!’s mapping API. It’s lovely that Yahoo! believes, unlike Google and other mapping providers, that their satellite data is a suitable base layer to use for derivation of vectors. This openness really is good to see — they win big points from me in this regard. (Google, on the other hand, is happy to have you give them data against their satellite imagery, but letting you actually have it back is against the Terms of Service.)
However, the Yahoo! Maps AJAX API has never gotten much love. I think that a preference for flash has always existed in the Yahoo! world; iirc, their original API was Flash.
However, I realized today that this tendancy to leave the AJAX API in the dust has resulted in something that seriously affects me: The Yahoo! maps AJAX API uses a different set of tiles, which has two fewer zoom levels available in it:
|AJAX Maps: most zoomed in
||Flash Maps: Most zoomed in
For the new OpenStreetMap editor I’m working on, this is a *serious* difference: although the information actually available in these tiles isn’t *that* much higher, it allows the user to extract more information by getting in a bit more, and to be more precise in placement of objects when using Yahoo! as a basemap.
What I would really love to see is more providers creating a more friendly way of accessing their tiles. I understand the need for counting of accesses, and the need for copyright notifications. If an API were published, that allowed you to:
- Fetch a copyright notice for a given area, possibly also returning a temporary token to use
- Following that, fetch tiles to fill that area
- Require users to copyright notice in such a way as to make Yahoo! and their providers happy
Now, it’s understandable that this doesn’t happen — having the client out of control of Yahoo! means that they can’t *enforce* that the copyright is displayed prominently, as they are able to (to some extent) with their API. However, I think that this type of API would allow more innovation, and possibly even a *more* prominent placement for Yahoo’s copyrights and notices. For example, in many mapping apps, the bottom inch of the map is not seen much by the users. If there was an API to get text to display, then an application could display the text in a more prominent location, rather than burying it under many markers or other pieces of text that might overlap it.