+
+ def get_picture(min_lat, min_lon, max_lat, max_lon, num_points)
+ frames = 10
+ width = 250
+ height = 250
+ rat= Math.cos( ((max_lat + min_lat)/2.0) / 180.0 * 3.141592)
+ proj = OSM::Mercator.new((min_lat + max_lat) / 2, (max_lon + min_lon) / 2, (max_lat - min_lat) / width / rat, width, height)
+
+ images = []
+
+ frames.times do
+ gc = Magick::Draw.new
+ gc.stroke_linejoin('miter')
+ gc.stroke('#FFFFFF')
+ gc.fill('#FFFFFF')
+ gc.rectangle(0,0,width,height)
+ gc.stroke_width(1)
+ images << gc
+ 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'])
+ frames.times do |n|
+ images[n].stroke_width(1)
+ images[n].stroke('#BBBBBB')
+ images[n].fill('#BBBBBB')
+ images[n].line(px, py, oldpx, oldpy ) unless first
+ end
+ images[mm].stroke_width(3)
+ images[mm].stroke('#000000')
+ images[mm].fill('#000000')
+ images[mm].line(px, py, oldpx, oldpy ) unless first
+
+ m +=1
+ if m > num_points.to_f / frames.to_f * (mm+1)
+ mm += 1
+ end
+ first = false
+ oldpy = py
+ oldpx = px
+ end
+
+ il = Magick::ImageList.new
+
+ frames.times do |n|
+ canvas = Magick::Image.new(width, height) {
+ self.background_color = 'white'
+ }
+ begin
+ images[n].draw(canvas)
+ rescue ArgumentError
+ end
+ canvas.format = 'GIF'
+ il << canvas
+ end
+
+ il.delay = 50
+ il.format = 'GIF'
+ return il.to_blob
+ end
+
+ def get_icon(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)
+ proj = OSM::Mercator.new((min_lat + max_lat) / 2, (max_lon + min_lon) / 2, (max_lat - min_lat) / width / rat, width, height)
+
+ images = []
+
+ gc = Magick::Draw.new
+ gc.stroke_linejoin('miter')
+
+ oldpx = 0.0
+ oldpy = 0.0
+
+ first = true
+
+ gc.stroke_width(1)
+ gc.stroke('#000000')
+ gc.fill('#000000')
+
+ points do |p|
+ px = proj.x(p['longitude'])
+ py = proj.y(p['latitude'])
+ gc.line(px, py, oldpx, oldpy ) unless first
+ first = false
+ oldpy = py
+ oldpx = px
+ end
+
+ canvas = Magick::Image.new(width, height) {
+ self.background_color = 'white'
+ }
+ begin
+ gc.draw(canvas)
+ rescue ArgumentError
+ end
+ canvas.format = 'GIF'
+ return canvas.to_blob
+ end
+