Ok, I hope to have understand. But there is another question. So then, starting from the whole map (that rapresent the entire globe), when I make zooming, each intermediate map is a new photo (satellitar or aerial) or is the same map at higher resolution?
In other words, are there different maps that were created at different height, and the zooming from a level to another level, represent the passage from a map to another different map? I make this question because I don't think that from one map (that represent entire world), is possible zooming until to view the city details. Thanks! Enrico On Jan 8, 7:13 pm, Barry Hunter <[email protected]> wrote: > Google Maps is a mosaics of many different resolutions. > > Each zoom level is pieced together from the best imagry available for > each location. Different imagery is chosen for different levels in > cases where a larger more consistent photograph can be used instead of > joining lots of smaller but high resolution imagery (because different > images often have slightly different colouring - taken at a different > time of day etc). > > I believe Google uses a 15m per pixel base resolution - that is has > globally, but then uses higher resolution imagery on a more selective > basis, down to about 50cm-25cm per pixel. But higher res is even used > in places. Such high res imagery usually comes from planes rather than > satellites. > > Google Earth on the other hand joins all photos to make one really > high resolution image, that is just continuously zoomable until run > out of resolution in a given area. (which is why the joins between > different images are more visible) > > Hope that helps! > > 2010/1/8 enrico <[email protected]>: > > > > > Hi everyone! > > > For a project, I'm interested to know how is management the maps in > > Google Maps. In particular, when making aerial photographs, are made > > at different resolution level? Or is there an only resolution level? > > Finally, at which resolution level are made the aerial photographs? > > > Excuse my English! > > Enrico > > > -- > > You received this message because you are subscribed to the Google Groups > > "Google Maps API" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group > > athttp://groups.google.com/group/google-maps-api?hl=en. > > -- > Barry > > -www.nearby.org.uk-www.geograph.org.uk-
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