The search along a tour found nothing. It asked the places index for all
kinds of a stretch at once, above the 100 rows and 200 characters of terms
the index takes, so the index refused and every stretch went to the public
Overpass mirrors, which do not answer from this server. Now the index is
asked in small circles strung along the line, one request per kind and
circle within its limits, and an empty circle counts as an answer, so a
city walk lists its sights, museums, parks, cafes, restaurants and markets
in well under a second. The kinds the index does not know (viewpoints,
huts, drinking water, toilets and the like) are asked of Overpass along the
whole line at the same time, one query per stretch of up to 50 km, three at
a time, each with a short deadline of its own; a line past 400 km is
searched along its start and says so. When the index answers no circle at
all, its kinds go to Overpass beside the others instead of after them. A
kind no source could be searched for is named in a calm notice above the
list instead of reporting nothing found, and the reason is written to the
log. Unnamed taps, toilets, shelters, picnic spots, viewpoints, summits,
slipways and repair stands stay in the list and on the map under the name
of their kind; an unnamed garden, cafe or memorial is left out. The places
nearest the line are kept when there are more than sixty, listed from the
start, with the opening hours the source has.
A walk's parks are parks and gardens only, and its museums are museums
and galleries only, no longer the beaches, summits, theatres and cinemas of
the map's explore buttons; a water park the index files under parks is not
one of them. The index also answers markets and summits. The explore
buttons keep their single request, and a search of several kinds that
would exceed the index limits is asked one kind at a time instead of being
refused. The MCP tool search_tour_pois and its wiki row describe the walk
kinds and the new unavailable list, and the OVERPASS_TIMEOUT_MS row says
the search along a tour keeps its own shorter deadline.
Maurice
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