def import
logger.info("GPX Import importing #{name} (#{id}) from #{user.email}")
- gpx = OSM::GPXImporter.new(self.xml_file)
+ gpx = GPX::File.new(self.xml_file)
f_lat = 0
f_lon = 0
gpx.points do |point|
if first
- f_lat = point['latitude']
- f_lon = point['longitude']
+ f_lat = point.latitude
+ f_lon = point.longitude
first = false
end
tp = Tracepoint.new
- tp.lat = point['latitude'].to_f
- tp.lon = point['longitude'].to_f
- tp.altitude = point['altitude'].to_f
- tp.timestamp = point['timestamp']
+ tp.lat = point.latitude
+ tp.lon = point.longitude
+ tp.altitude = point.altitude
+ tp.timestamp = point.timestamp
tp.gpx_id = id
- tp.trackid = point['segment'].to_i
+ tp.trackid = point.segment
tp.save!
end
self.latitude = f_lat
self.longitude = f_lon
- self.large_picture = gpx.get_picture(min_lat, min_lon, max_lat, max_lon, gpx.actual_points)
- self.icon_picture = gpx.get_icon(min_lat, min_lon, max_lat, max_lon)
+ self.large_picture = gpx.picture(min_lat, min_lon, max_lat, max_lon, gpx.actual_points)
+ self.icon_picture = gpx.icon(min_lat, min_lon, max_lat, max_lon)
self.size = gpx.actual_points
self.inserted = true
self.save!
require 'rubygems'
-gem 'libxml-ruby', '>= 0.8.1'
+gem 'libxml-ruby', '>= 0.8.3'
require 'libxml'
LibXML::XML::Parser.register_error_handler do |message|
--- /dev/null
+module GPX
+ class File
+ require "libxml"
+
+ include 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
+
+ @file.rewind
+
+ reader = XML::Reader.io(@file)
+
+ point = nil
+
+ while reader.read > 0
+ if reader.node_type == XML::Reader::TYPE_ELEMENT
+ if reader.name == "trkpt"
+ point = TrkPt.new(@tracksegs, reader["lat"].to_f, reader["lon"].to_f)
+ @possible_points += 1
+ elsif reader.name == "ele" and point
+ point.altitude = reader.read_string.to_f
+ elsif reader.name == "time" and point
+ point.timestamp = DateTime.parse(reader.read_string)
+ end
+ elsif reader.node_type == XML::Reader::TYPE_END_ELEMENT
+ if reader.name == "trkpt" and point and point.valid?
+ point.altitude ||= 0
+ yield point
+ @actual_points += 1
+ elsif reader.name == "trkseg"
+ @tracksegs += 1
+ end
+ end
+ end
+ end
+
+ def picture(min_lat, min_lon, max_lat, max_lon, num_points)
+ 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 icon(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
+
+private
+
+ class TrkPt < Struct.new(:segment, :latitude, :longitude, :altitude, :timestamp)
+ def valid?
+ self.latitude and self.longitude and self.timestamp and
+ self.latitude >= -90 and self.latitude <= 90 and
+ self.longitude >= -180 and self.longitude <= 180
+ end
+ end
+end
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
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