7 from lxml import html,etree
8 from optparse import OptionParser
10 from pprint import pprint
12 from pyrungps.pygpx import GPX
14 from pyproj import Transformer
17 # spherical mercator (most common target map projection of osm data imported with osm2pgsql)
18 #merc = mapnik.Projection('+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs +over')
20 # long/lat in degrees, aka ESPG:4326 and "WGS 84"
21 #longlat = mapnik.Projection('+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs')
22 # can also be constructed as:
23 #longlat = mapnik.Projection('+init=epsg:4326')
25 # ensure minimum mapnik version
26 if not hasattr(mapnik,'mapnik_version') and not mapnik.mapnik_version() >= 600:
27 raise SystemExit('This script requires Mapnik >=0.6.0)')
30 def render_map(mapfile,map_uri,gpx_file,imgx,imgy):
32 with open(gpx_file,'r') as f:
35 xml = etree.fromstring(data)
39 bbox = gpx.bound_box()
41 cx=(bbox[0][1]+bbox[1][1])/2
42 cy=(bbox[0][0]+bbox[1][0])/2
44 w=(bbox[1][1]-bbox[0][1])*1.2
45 h=(bbox[1][0]-bbox[0][0])*1.2
47 bounds = (cx-w/2,cy-h/2,cx+w/2,cy+h/2)
50 m = mapnik.Map(imgx,imgy)
51 mapnik.load_map(m,mapfile)
53 m.background = mapnik.Color('rgb(255,255,255)')
55 # ensure the target map projection is mercator
56 #m.srs = merc.params()
58 bbox = mapnik.Box2d(*bounds)
67 print(minlat,maxlat,minlon,maxlon)
69 transformer = Transformer.from_crs("EPSG:4326", "EPSG:3857", always_xy=True)
70 minP=transformer.transform(minlon,minlat)
71 maxP=transformer.transform(maxlon,maxlat)
73 merc_bbox = mapnik.Box2d(minP[0],minP[1],maxP[0],maxP[1])
74 m.zoom_to_box(merc_bbox)
76 style = mapnik.Style()
79 line_symbolizer = mapnik.LineSymbolizer()
81 line_symbolizer.stroke = mapnik.Color('rgb(0,0,127)')
82 line_symbolizer.stroke_width = 4.0
83 line_symbolizer.stroke_opacity = 0.5
85 rule.symbols.append(line_symbolizer)
87 style.rules.append(rule)
88 m.append_style('GPS_tracking_points', style)
90 layer = mapnik.Layer('GPS_tracking_points')
91 layer.datasource = mapnik.Ogr(file=gpx_file, layer='tracks')
92 layer.styles.append('GPS_tracking_points')
93 m.layers.append(layer)
95 im = mapnik.Image(imgx,imgy)
97 im.save(map_uri,'png')
98 sys.stdout.write('output image to %s!\n' % map_uri)
101 def render_all(db,mapfile,imgx,imgy):
104 from os.path import dirname
106 conn = sqlite3.connect(db)
107 conn.text_factory = str
109 updcur = conn.cursor()
111 cur.execute ("select id,filename from tracks where preview_name is null")
119 preview_name = dirname(filename) + '/' + str(id) + '.png'
121 print(id,filename,preview_name)
124 render_map(mapfile,preview_name.encode('utf8'),filename,imgx,imgy)
125 updcur.execute("update tracks set preview_name=? where id=?", (preview_name,id))
133 parser = OptionParser()
134 parser.add_option("-m", "--map", dest="mapfile",
135 help="use map file", metavar="MAP")
136 parser.add_option("-o", "--output", dest="outfile",
137 help="output image to file", metavar="OUT")
138 parser.add_option("-g", "--gpx", dest="gpxfile",
139 help="track to render", metavar="GPX")
140 parser.add_option("-x", "--x-size", dest="x",
141 help="image width", metavar="X")
142 parser.add_option("-y", "--y-size", dest="y",
143 help="image height", metavar="Y")
144 parser.add_option("-d", "--db", dest="db",
145 help="render all not process files in database", metavar="DB")
146 (options, args) = parser.parse_args()
149 mapfile = options.mapfile
151 mapfile = "/etc/mapnik-osm-carto-data/veloroad-imposm.xml"
154 map_uri = options.outfile
156 map_uri = "image.png"
159 imgx = int(options.x)
163 imgy = int(options.y)
168 render_all(options.db,mapfile,imgx,imgy)
171 gpx_file = options.gpxfile
172 render_map(mapfile,map_uri,gpx_file,imgx,imgy)
174 print("No input file")
175 raise IOError("No input file")
177 if __name__ == "__main__":