462 lines
12 KiB
Ruby
462 lines
12 KiB
Ruby
# The OSM module provides support functions for OSM.
|
|
module OSM
|
|
|
|
require 'time'
|
|
require 'rexml/parsers/sax2parser'
|
|
require 'rexml/text'
|
|
require 'xml/libxml'
|
|
require 'digest/md5'
|
|
require 'RMagick'
|
|
|
|
# The base class for API Errors.
|
|
class APIError < RuntimeError
|
|
def render_opts { :text => "", :status => :internal_server_error } end
|
|
end
|
|
|
|
# Raised when an API object is not found.
|
|
class APINotFoundError < APIError
|
|
end
|
|
|
|
# Raised when a precondition to an API action fails sanity check.
|
|
class APIPreconditionFailedError < APIError
|
|
def render_opts { :text => "", :status => :precondition_failed } end
|
|
end
|
|
|
|
# Raised when to delete an already-deleted object.
|
|
class APIAlreadyDeletedError < APIError
|
|
def render_opts { :text => "", :status => :gone } end
|
|
end
|
|
|
|
# Raised when the provided version is not equal to the latest in the db.
|
|
class APIVersionMismatchError < APIError
|
|
def initialize(provided, latest)
|
|
@provided, @latest = provided, latest
|
|
end
|
|
|
|
attr_reader :provided, :latest
|
|
|
|
def render_opts
|
|
{ :text => "Version mismatch: Provided " + ex.provided.to_s +
|
|
", server had: " + ex.latest.to_s, :status => :bad_request }
|
|
end
|
|
end
|
|
|
|
# Helper methods for going to/from mercator and lat/lng.
|
|
class Mercator
|
|
include Math
|
|
|
|
#init me with your bounding box and the size of your image
|
|
def initialize(min_lat, min_lon, max_lat, max_lon, width, height)
|
|
xsize = xsheet(max_lon) - xsheet(min_lon)
|
|
ysize = ysheet(max_lat) - ysheet(min_lat)
|
|
xscale = xsize / width
|
|
yscale = ysize / height
|
|
scale = [xscale, yscale].max
|
|
|
|
xpad = width * scale - xsize
|
|
ypad = height * scale - ysize
|
|
|
|
@width = width
|
|
@height = height
|
|
|
|
@tx = xsheet(min_lon) - xpad / 2
|
|
@ty = ysheet(min_lat) - ypad / 2
|
|
|
|
@bx = xsheet(max_lon) + xpad / 2
|
|
@by = ysheet(max_lat) + ypad / 2
|
|
end
|
|
|
|
#the following two functions will give you the x/y on the entire sheet
|
|
|
|
def ysheet(lat)
|
|
log(tan(PI / 4 + (lat * PI / 180 / 2))) / (PI / 180)
|
|
end
|
|
|
|
def xsheet(lon)
|
|
lon
|
|
end
|
|
|
|
#and these two will give you the right points on your image. all the constants can be reduced to speed things up. FIXME
|
|
|
|
def y(lat)
|
|
return @height - ((ysheet(lat) - @ty) / (@by - @ty) * @height)
|
|
end
|
|
|
|
def x(lon)
|
|
return ((xsheet(lon) - @tx) / (@bx - @tx) * @width)
|
|
end
|
|
end
|
|
|
|
|
|
# This piece of magic reads a GPX with SAX and spits out
|
|
# lat/lng and stuff
|
|
#
|
|
# This would print every latitude value:
|
|
#
|
|
# gpx = OSM::GPXImporter.new('somefile.gpx')
|
|
# gpx.points {|p| puts p['latitude']}
|
|
class GPXImporter
|
|
# FIXME swap REXML for libXML
|
|
attr_reader :possible_points
|
|
attr_reader :actual_points
|
|
attr_reader :tracksegs
|
|
|
|
def initialize(file)
|
|
@file = file
|
|
end
|
|
|
|
def points
|
|
@possible_points = 0
|
|
@actual_points = 0
|
|
@tracksegs = 0
|
|
|
|
lat = -1
|
|
lon = -1
|
|
ele = -1
|
|
date = DateTime.now();
|
|
gotlatlon = false
|
|
gotele = false
|
|
gotdate = false
|
|
|
|
@file.rewind
|
|
|
|
parser = REXML::Parsers::SAX2Parser.new(@file)
|
|
|
|
parser.listen( :start_element, %w{ trkpt }) do |uri,localname,qname,attributes|
|
|
lat = attributes['lat'].to_f
|
|
lon = attributes['lon'].to_f
|
|
gotlatlon = true
|
|
gotele = false
|
|
gotdate = false
|
|
@possible_points += 1
|
|
end
|
|
|
|
parser.listen( :characters, %w{ ele } ) do |text|
|
|
ele = text
|
|
gotele = true
|
|
end
|
|
|
|
parser.listen( :characters, %w{ time } ) do |text|
|
|
if text && text != ''
|
|
begin
|
|
date = DateTime.parse(text)
|
|
gotdate = true
|
|
rescue
|
|
end
|
|
end
|
|
end
|
|
|
|
parser.listen( :end_element, %w{ trkseg } ) do |uri, localname, qname|
|
|
@tracksegs += 1
|
|
end
|
|
|
|
parser.listen( :end_element, %w{ trkpt } ) do |uri,localname,qname|
|
|
if gotlatlon && gotdate
|
|
ele = '0' unless gotele
|
|
if lat < 90 && lat > -90 && lon > -180 && lon < 180
|
|
@actual_points += 1
|
|
yield Hash['latitude' => lat, 'longitude' => lon, 'timestamp' => date, 'altitude' => ele, 'segment' => @tracksegs]
|
|
end
|
|
end
|
|
gotlatlon = false
|
|
gotele = false
|
|
gotdate = false
|
|
end
|
|
|
|
parser.parse
|
|
end
|
|
|
|
def get_picture(min_lat, min_lon, max_lat, max_lon, num_points)
|
|
#puts "getting picfor bbox #{min_lat},#{min_lon} - #{max_lat},#{max_lon}"
|
|
frames = 10
|
|
width = 250
|
|
height = 250
|
|
proj = OSM::Mercator.new(min_lat, min_lon, max_lat, max_lon, width, height)
|
|
|
|
linegc = Magick::Draw.new
|
|
linegc.stroke_linejoin('miter')
|
|
linegc.stroke_width(1)
|
|
linegc.stroke('#BBBBBB')
|
|
linegc.fill('#BBBBBB')
|
|
|
|
highlightgc = Magick::Draw.new
|
|
highlightgc.stroke_linejoin('miter')
|
|
highlightgc.stroke_width(3)
|
|
highlightgc.stroke('#000000')
|
|
highlightgc.fill('#000000')
|
|
|
|
images = []
|
|
|
|
frames.times do
|
|
image = Magick::Image.new(width, height) do |image|
|
|
image.background_color = 'white'
|
|
image.format = 'GIF'
|
|
end
|
|
|
|
images << image
|
|
end
|
|
|
|
oldpx = 0.0
|
|
oldpy = 0.0
|
|
|
|
first = true
|
|
|
|
m = 0
|
|
mm = 0
|
|
points do |p|
|
|
px = proj.x(p['longitude'])
|
|
py = proj.y(p['latitude'])
|
|
|
|
if m > 0
|
|
frames.times do |n|
|
|
if n == mm
|
|
gc = highlightgc.dup
|
|
else
|
|
gc = linegc.dup
|
|
end
|
|
|
|
gc.line(px, py, oldpx, oldpy)
|
|
|
|
gc.draw(images[n])
|
|
end
|
|
end
|
|
|
|
m += 1
|
|
if m > num_points.to_f / frames.to_f * (mm+1)
|
|
mm += 1
|
|
end
|
|
|
|
oldpy = py
|
|
oldpx = px
|
|
end
|
|
|
|
il = Magick::ImageList.new
|
|
|
|
images.each do |f|
|
|
il << f
|
|
end
|
|
|
|
il.delay = 50
|
|
il.format = 'GIF'
|
|
|
|
return il.to_blob
|
|
end
|
|
|
|
def get_icon(min_lat, min_lon, max_lat, max_lon)
|
|
#puts "getting icon for bbox #{min_lat},#{min_lon} - #{max_lat},#{max_lon}"
|
|
width = 50
|
|
height = 50
|
|
proj = OSM::Mercator.new(min_lat, min_lon, max_lat, max_lon, width, height)
|
|
|
|
gc = Magick::Draw.new
|
|
gc.stroke_linejoin('miter')
|
|
gc.stroke_width(1)
|
|
gc.stroke('#000000')
|
|
gc.fill('#000000')
|
|
|
|
image = Magick::Image.new(width, height) do |image|
|
|
image.background_color = 'white'
|
|
image.format = 'GIF'
|
|
end
|
|
|
|
oldpx = 0.0
|
|
oldpy = 0.0
|
|
|
|
first = true
|
|
|
|
points do |p|
|
|
px = proj.x(p['longitude'])
|
|
py = proj.y(p['latitude'])
|
|
|
|
gc.dup.line(px, py, oldpx, oldpy).draw(image) unless first
|
|
|
|
first = false
|
|
oldpy = py
|
|
oldpx = px
|
|
end
|
|
|
|
return image.to_blob
|
|
end
|
|
|
|
end
|
|
|
|
class GreatCircle
|
|
include Math
|
|
|
|
# initialise with a base position
|
|
def initialize(lat, lon)
|
|
@lat = lat * PI / 180
|
|
@lon = lon * PI / 180
|
|
end
|
|
|
|
# get the distance from the base position to a given position
|
|
def distance(lat, lon)
|
|
lat = lat * PI / 180
|
|
lon = lon * PI / 180
|
|
return 6372.795 * 2 * asin(sqrt(sin((lat - @lat) / 2) ** 2 + cos(@lat) * cos(lat) * sin((lon - @lon)/2) ** 2))
|
|
end
|
|
|
|
# get the worst case bounds for a given radius from the base position
|
|
def bounds(radius)
|
|
latradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2) ** 2))
|
|
lonradius = 2 * asin(sqrt(sin(radius / 6372.795 / 2) ** 2 / cos(@lat) ** 2))
|
|
minlat = (@lat - latradius) * 180 / PI
|
|
maxlat = (@lat + latradius) * 180 / PI
|
|
minlon = (@lon - lonradius) * 180 / PI
|
|
maxlon = (@lon + lonradius) * 180 / PI
|
|
return { :minlat => minlat, :maxlat => maxlat, :minlon => minlon, :maxlon => maxlon }
|
|
end
|
|
end
|
|
|
|
class GeoRSS
|
|
def initialize(feed_title='OpenStreetMap GPS Traces', feed_description='OpenStreetMap GPS Traces', feed_url='http://www.openstreetmap.org/traces/')
|
|
@doc = XML::Document.new
|
|
@doc.encoding = 'UTF-8'
|
|
|
|
rss = XML::Node.new 'rss'
|
|
@doc.root = rss
|
|
rss['version'] = "2.0"
|
|
rss['xmlns:geo'] = "http://www.w3.org/2003/01/geo/wgs84_pos#"
|
|
@channel = XML::Node.new 'channel'
|
|
rss << @channel
|
|
title = XML::Node.new 'title'
|
|
title << feed_title
|
|
@channel << title
|
|
description_el = XML::Node.new 'description'
|
|
@channel << description_el
|
|
|
|
description_el << feed_description
|
|
link = XML::Node.new 'link'
|
|
link << feed_url
|
|
@channel << link
|
|
image = XML::Node.new 'image'
|
|
@channel << image
|
|
url = XML::Node.new 'url'
|
|
url << 'http://www.openstreetmap.org/images/mag_map-rss2.0.png'
|
|
image << url
|
|
title = XML::Node.new 'title'
|
|
title << "OpenStreetMap"
|
|
image << title
|
|
width = XML::Node.new 'width'
|
|
width << '100'
|
|
image << width
|
|
height = XML::Node.new 'height'
|
|
height << '100'
|
|
image << height
|
|
link = XML::Node.new 'link'
|
|
link << feed_url
|
|
image << link
|
|
end
|
|
|
|
def add(latitude=0, longitude=0, title_text='dummy title', author_text='anonymous', url='http://www.example.com/', description_text='dummy description', timestamp=DateTime.now)
|
|
item = XML::Node.new 'item'
|
|
|
|
title = XML::Node.new 'title'
|
|
item << title
|
|
title << title_text
|
|
link = XML::Node.new 'link'
|
|
link << url
|
|
item << link
|
|
|
|
guid = XML::Node.new 'guid'
|
|
guid << url
|
|
item << guid
|
|
|
|
description = XML::Node.new 'description'
|
|
description << description_text
|
|
item << description
|
|
|
|
author = XML::Node.new 'author'
|
|
author << author_text
|
|
item << author
|
|
|
|
pubDate = XML::Node.new 'pubDate'
|
|
pubDate << timestamp.to_s(:rfc822)
|
|
item << pubDate
|
|
|
|
if latitude
|
|
lat_el = XML::Node.new 'geo:lat'
|
|
lat_el << latitude.to_s
|
|
item << lat_el
|
|
end
|
|
|
|
if longitude
|
|
lon_el = XML::Node.new 'geo:long'
|
|
lon_el << longitude.to_s
|
|
item << lon_el
|
|
end
|
|
|
|
@channel << item
|
|
end
|
|
|
|
def to_s
|
|
return @doc.to_s
|
|
end
|
|
end
|
|
|
|
class API
|
|
def get_xml_doc
|
|
doc = XML::Document.new
|
|
doc.encoding = 'UTF-8'
|
|
root = XML::Node.new 'osm'
|
|
root['version'] = API_VERSION
|
|
root['generator'] = 'OpenStreetMap server'
|
|
doc.root = root
|
|
return doc
|
|
end
|
|
end
|
|
|
|
def self.IPLocation(ip_address)
|
|
Timeout::timeout(4) do
|
|
Net::HTTP.start('api.hostip.info') do |http|
|
|
country = http.get("/country.php?ip=#{ip_address}").body
|
|
country = "GB" if country == "UK"
|
|
Net::HTTP.start('ws.geonames.org') do |http|
|
|
xml = REXML::Document.new(http.get("/countryInfo?country=#{country}").body)
|
|
xml.elements.each("geonames/country") do |ele|
|
|
minlon = ele.get_text("bBoxWest").to_s
|
|
minlat = ele.get_text("bBoxSouth").to_s
|
|
maxlon = ele.get_text("bBoxEast").to_s
|
|
maxlat = ele.get_text("bBoxNorth").to_s
|
|
return { :minlon => minlon, :minlat => minlat, :maxlon => maxlon, :maxlat => maxlat }
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
return nil
|
|
rescue Exception
|
|
return nil
|
|
end
|
|
|
|
# Construct a random token of a given length
|
|
def self.make_token(length = 30)
|
|
chars = 'abcdefghijklmnopqrtuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
|
|
token = ''
|
|
|
|
length.times do
|
|
token += chars[(rand * chars.length).to_i].chr
|
|
end
|
|
|
|
return token
|
|
end
|
|
|
|
# Return an encrypted version of a password
|
|
def self.encrypt_password(password, salt)
|
|
return Digest::MD5.hexdigest(password) if salt.nil?
|
|
return Digest::MD5.hexdigest(salt + password)
|
|
end
|
|
|
|
# Return an SQL fragment to select a given area of the globe
|
|
def self.sql_for_area(minlat, minlon, maxlat, maxlon, prefix = nil)
|
|
tilesql = QuadTile.sql_for_area(minlat, minlon, maxlat, maxlon, prefix)
|
|
minlat = (minlat * 10000000).round
|
|
minlon = (minlon * 10000000).round
|
|
maxlat = (maxlat * 10000000).round
|
|
maxlon = (maxlon * 10000000).round
|
|
|
|
return "#{tilesql} AND #{prefix}latitude BETWEEN #{minlat} AND #{maxlat} AND #{prefix}longitude BETWEEN #{minlon} AND #{maxlon}"
|
|
end
|
|
|
|
|
|
end
|