downloadosmtiles Man page

DOWNLOADOSMTILES(1p) User Contributed Perl Documentation DOWNLOADOSMTILES(1p)

NAME

downloadosmtiles.pl – Download map tiles from OpenStreetMap

SYNOPSIS

downloadosmtiles.pl –lat=49.5611:49.6282 –lon=10.951:11.0574 –zoom=13:14
downloadosmtiles.pl –link=’http://www.openstreetmap.org/?lat=-23.5872&lon=-46.6508&zoom=12&layers=B000FTF’
downloadosmtiles.pl –loadtilelist=filename

DESCRIPTION

This script downloads all map tiles from an OpenStreetMap tile server
for some geographic region in a range of zoom levels. The PNG images
of the tiles are stored in a directory tree that mirrors the paths from
the server.

A bounding box of geographic coordinates and a range of zoom levels
must be selected by command line options.

COMMAND LINE

OPTIONS

Command line options may be abbreviated as long as they remain
unambiguous.

At least either “–latitude”, “–longitude”, and “–zoom” or “–link”
must be specified.

“–latitude=latmin[:latmax]”
Selects the latitude of the bounding box of coordinates to download.
May be one single real value or two real values separated by a colon in
the range “-85.0511..85.0511”. If given only one value, just the tile
(or row of tiles) at this latitude will be downloaded.

Default: none

“–longitude=lonmin[:lonmax]”
Selects the longitude of the bounding box of coordinates to download.
May be one single real value or two real values separated by a colon in
the range “-180.0..180.0”. If given only one value, just the tile (or
column of tiles) at this longitude will be downloaded.

Default: none

“–zoom=zoommin[:zoommax]”
Selects the range of zoom levels to download the map tiles for. May be
one single integer value or two integer values separated by a colon.
OpenStreetMap supports zoom levels in the range 0..18. (This depends
on the base URL and is not enforced by this script.)

Note that the number of tiles to download grows by a factor of up to
four with each zoom level.

Default: none

“–link=url”
An URL selecting “–latitude”, “–longitude”, and “–zoom” in one
argument. The idea is to select the current view of OSM’s slippy map
by its permalink.

The argument to “–link” must be an URL containing the HTTP options
“?lat=s&lon=s&zoom=s”. (Actually, the base URL will be ignored.) The
script chooses a box around the latitude and longitude options. The
size of the box depends on the zoom option.

If combined with “–latitude”, “–longitude”, or “–zoom”, these
explicitly specified values override the implicitly specified values
from “–link”.

Default: none

“–baseurl=url”
The base URL of the server to download the tiles from.

Default: (This is the base URL for the
Mapnik tiles.)

“–destdir=dir”
The directory where the tiles will be stored. The PNG files will be
stored as “dir/zoom/x/y.png”.

Default: The current working directory.

“–quiet”
Do not write any diagnostic messages. Only fatal errors will be
reported.

“–dumptilelist=filename”
Do not download any tiles at all, but write a list of tiles as selected
by other command line options to the file named “filename”. See “TILE
LISTS” below.

“–loadtilelist=filename”
Read a list of tiles to download from the file “filename”. See “TILE
LISTS” below.

EXAMPLE
Select the region of interest in OSM’s slippy map and follow the
permalink in the lower left of the window. Lets assume this permalink
to be
.
Then

downloadosmtiles.pl –link=’http://www.openstreetmap.org/?lat=49.5782&lon=11.0076&zoom=12&layers=B000FTF’ –zoom=5:18

will download all tiles from zoom level 5 to 18 for this region.

TILE LISTS
A list of tiles may be stored to and retrieved from external files
using the “–dumptilelist” and “–loadtilelist” command line options.
A set of tiles may be selected using the command line options
“–latitude”, “–longitude”, “–zoom”, and “–link” and written to a
file specified with “–dumptilelist”. This list may be read at a later
date using the “–loadtilelist” option.

This may be useful to postpone the download of the tiles, to edit the
list of tiles, or to use some external tool to generate this list.

The tile lists are read and written in YAML format. Please note that
this is an experimental feature in the current version. The file
format is not considered stable yet. There is no guarantee that a list
of tiles generated by one version of this script may be read in by a
future version.

ENVIRONMENT
http_proxy
ftp_proxy
xxx_proxy
no_proxy
These environment variables can be set to enable communication
through a proxy server. This is implemented by LWP::UserAgent.

BUGS

· Ranges in the command line options must always be increasing.
While this is considered a feature for “–latitude” and “–zoom”,
it means that it is impossible for a range in the “–longitude”
argument to cross the 180 degree line. A command line option like
“–longitude=179.5:-179.5” will not work as one should expect.

· The bounding box selected by the “–link” command line option does
not always correspond to the current view in the slippy map. The
problem is that the permalink from the slippy map only contains one
position and not the bounds of the current view. The actual view
of the slippy map depends on many factors, including the size of
the browser window. Thus, there is not much that can be done about
this issue.

SEE ALSO

AUTHOR

Rolf Krahl

COPYRIGHT AND LICENCE
Copyright (C) 2008-2010 by Rolf Krahl

This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself, either Perl version 5.8.8 or, at
your option, any later version of Perl 5 you may have available.

perl v5.20.1 2014-10-25 DOWNLOADOSMTILES(1p)

Ils en parlent aussi