Hi,
Elizabeth Dodd wrote:
(And, if my memory
serves, you get slapped on the wrist for trying to download too much.)
based on a formula which is related to the number of square kilometres
involved, and which has no relation to the amount of data involved.
It is presented as a restriction from the API, whether or not that is
true.
The API restricts downloads to an area of 0.25 degrees squared (i.e. you
can download an area 0.5 degrees high by 0.5 degrees wide, or 0.1
degrees high by 2.5 degrees high). Note that degrees != square
kilometres; the nearer you are to the Equator, the more square
kilometres you are allowed to download. JOSM informs you of this
restriction in the download box, but allows you to try your luck
nonetheless (it just tells you that your query is likely to be
rejected). In addition, the API will reject requests for an area that
contains more than 50,000 nodes, even if it is smaller than 0.25 degrees
squared; sadly, JOSM has no chance of informing the user beforehand that
they might hit this limit.
In places where I have been and tend to go I can get the slap on the
wrist described above when in fact there is nil data at all to
download :(
Then I guess you have to map more ;)
No, seriously, it would be great if someone found a way to modify the
API (more precisely, the cgimap program) so that it accepts requests for
larger bounding boxes in sparsely mapped areas. It is probably not easy
to do this in a performant manner though, as by the time you have found
out that the area that was requested contains a million nodes, you have
already spent a lot of time slowing down the database - maybe one would
have to have a special mapping density index for various regions of the
planet.
Bye
Frederik
--
Frederik Ramm ## eMail frede...@remote.org ## N49°00'09" E008°23'33"
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