#
# This would print every latitude value:
#
- # gpx = OSM:GPXImporter.new('somefile.gpx')
+ # gpx = OSM::GPXImporter.new('somefile.gpx')
# gpx.points {|p| puts p['latitude']}
require 'time'
require 'rexml/parsers/sax2parser'
require 'rexml/text'
require 'xml/libxml'
+ require 'digest/md5'
require 'RMagick'
class Mercator
@clat = lat
@clon = lon
@degrees_per_pixel = degrees_per_pixel
+ @degrees_per_pixel = 0.0000000001 if @degrees_per_pixel < 0.0000000001
@width = width
@height = height
- @dlon = width / 2 * degrees_per_pixel
- @dlat = height / 2 * degrees_per_pixel * cos(@clat * PI / 180)
+ @dlon = width / 2 * @degrees_per_pixel
+ @dlat = height / 2 * @degrees_per_pixel * cos(@clat * PI / 180)
@tx = xsheet(@clon - @dlon)
@ty = ysheet(@clat - @dlat)
attr_reader :tracksegs
def initialize(filename)
+ @filename = filename
+ end
+
+ def points
@possible_points = 0
@actual_points = 0
@tracksegs = 0
- @points = []
-
- file = File.new(filename)
- parser = REXML::Parsers::SAX2Parser.new( file )
lat = -1
lon = -1
gotele = false
gotdate = false
+ parser = REXML::Parsers::SAX2Parser.new(File.new(@filename))
+
parser.listen( :start_element, %w{ trkpt }) do |uri,localname,qname,attributes|
lat = attributes['lat'].to_f
lon = attributes['lon'].to_f
parser.listen( :characters, %w{ time } ) do |text|
if text && text != ''
- date = DateTime.parse(text)
- gotdate = true
+ begin
+ date = DateTime.parse(text)
+ gotdate = true
+ rescue
+ end
end
end
ele = '0' unless gotele
if lat < 90 && lat > -90 && lon > -180 && lon < 180
@actual_points += 1
- @points.push(Hash['latitude' => lat,'longitude' => lon,'timestamp' => date,'altitude' => ele,'segment' => @tracksegs])
+ 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 points
- @points.each { |p| yield p }
+ parser.parse
end
def get_picture(min_lat, min_lon, max_lat, max_lon, num_points)
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}"
+ #puts "getting icon for bbox #{min_lat},#{min_lon} - #{max_lat},#{max_lon}"
width = 50
height = 50
rat= Math.cos( ((max_lat + min_lat)/2.0) / 180.0 * 3.141592)
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
image = XML::Node.new 'image'
@channel << image
url = XML::Node.new 'url'
- url << 'http://www.openstreetmap.org/feeds/mag_map-rss2.0.png'
+ url << 'http://www.openstreetmap.org/images/mag_map-rss2.0.png'
image << url
title = XML::Node.new 'title'
title << "OpenStreetMap"
image << link
end
- def add(latitude=0, longitude=0, title_text='dummy title', url='http://www.example.com/', description_text='dummy description', timestamp=DateTime.now)
+ 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'
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
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 * 1000000).round
+ minlon = (minlon * 1000000).round
+ maxlat = (maxlat * 1000000).round
+ maxlon = (maxlon * 1000000).round
+
+ return "#{tilesql} AND #{prefix}latitude BETWEEN #{minlat} AND #{maxlat} AND #{prefix}longitude BETWEEN #{minlon} AND #{maxlon}"
+ end
end
projects / rails.git / blobdiff