def __init__(self, content):
""" With MapRenderer you can render an aktionskarten map in different
file formats like pdf, svg or png.
Internally it uses mapnik and cairo to archieve this. A valid style
has to be defined through `MAPNIK_OSM_XML`. Normally this a carto
derived `style.xml`. In this file your datasource is specified. This
can be for instance a postgres+postgis database with imported osm
data.
:param content: dict of map content
"""
# Mapnik uses mercator as internal projection. Our data is encoded in
# latlon. Therefor we need a transformer for coordindates from longlat
# to mercator
proj_merc = 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')
proj_longlat = Projection('+proj=longlat +ellps=WGS84 +datum=WGS84 \
+no_defs')
transformer = ProjTransform(proj_longlat, proj_merc)
# our maps should be printable on a DIN A4 page with 150dpi
self._map = Map(1754, 1240)
bbox = transformer.forward(Box2d(*content['bbox']))
self._map.zoom_to_box(bbox)
self._map.buffer_size = 5
start = timer()
# add osm data (background)
load_map(self._map, current_app.config['MAPNIK_OSM_XML'])
mid = timer()
self._add_grid(content['grid'])
self._add_features(content['features'])
self._add_legend(content['name'], content['place'], content['datetime'],
content['attributes'])
end = timer()
print("Map.init - OSM: ", mid - start)
print("Map.init - Map: ", end - mid)
print("Map.init - Total: ", end - start)
# note: requires mapnik SVN r822 or greater.
# Example of reprojecting the extent for the netherlands in epsg:28992 to google mercator and then back to the original netherlands extent.
import sys
try:
from mapnik import ProjTransform, Projection, Envelope
except ImportError, E:
sys.exit('Requires Mapnik SVN r822 or greater:\n%s' % E)
# http://spatialreference.org/ref/epsg/28992/
# http://mapnik.dbsgeo.com/days/2009-01-25
amersfoort_extent = Envelope(13599.999985,306799.999985,277999.999985,619299.999985)
amersfoort_proj = Projection('+init=epsg:28992')
merc_proj = 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 +wktext +no_defs')
transform = ProjTransform(amersfoort_proj,merc_proj)
merc_extent = transform.forward(amersfoort_extent)
if transform.backward(merc_extent).__repr__() == amersfoort_extent.__repr__():
print 'Transformation successful!'
print 'Original Dutch Extent: %s' % amersfoort_extent
print 'Merc Extent: %s' % merc_extent
else:
print 'Reprojection failure...'
def GET(self, tilename, epsg, z, x, y):
global cached_maps
sffx = 'png'
epsg = int(epsg)
z = int(z)
x = int(x)
y = int(y)
if (z < 0 or z > 19):
return ''
cType = {
"png":"image/png"
}
qs = web.input(r='',x='',q='')
isCache = False
if qs.r == '':
isCache = True
output = False
tilep = Tilep()
web.header("Access-Control-Allow-Origin", "*")
atilename = tilename+'_'+str(epsg)
dbfilet = tilep.getDb(atilename)
if dbfilet:
cont = lite.connect(dbfilet)
curt = cont.cursor()
if isCache and dbfilet:
if (qs.q == '') :
sql = "SELECT * from tiles WHERE z = ? AND x = ? AND y = ? AND sffx = ? AND (q is null or q = ?);"
else :
sql = "SELECT * from tiles WHERE z = ? AND x = ? AND y = ? AND sffx = ? AND q = ?;"
curt.execute(sql,[z,x,y,sffx,qs.q])
rows = curt.fetchall()
for row in rows:
output = zlib.decompress(row[7])
if output:
web.header("Content-Type", cType[sffx])
return output
if not output:
box = tilep.getBbox(z=z,x=x,y=y)
geo_extent = Box2d(box[0],box[1],box[2],box[3])
geo_proj = Projection('+init=epsg:4326')
merc_proj = Projection('+init=epsg:'+str(epsg))
transform = ProjTransform(geo_proj,merc_proj)
merc_extent = transform.forward(geo_extent)
mp = False
if isCache and atilename in cached_maps :
if qs.q in cached_maps[atilename]:
mp = cached_maps[atilename][qs.q]
if not mp:
mp = mapnik.Map(256,256,'+init=epsg:'+str(epsg))
s = mapnik.Style()
r = mapnik.Rule()
r.symbols.append(mapnik.RasterSymbolizer())
s.rules.append(r)
mp.append_style('RStyle',s)
adir = os.path.dirname(os.path.realpath(__file__))
coni = lite.connect(adir+'/indeks.db')
curi = coni.cursor()
sql = "SELECT * FROM indeks WHERE name = ? AND epsg = ? AND ((maxx >= ? AND maxy >= ? AND minx <= ? AND miny <= ?) OR (minx <= ? AND miny <= ? AND maxx >= ? AND maxy >= ?))"
if (qs.q != '') :
try:
qray = json.loads(qs.q)
except ValueError:
qray = False
if isinstance(qray, list):
qray[0]= 'filename'
qc = str(tilep.getQuery(qray))
sql = sql+"AND "+qc
curi.execute(sql,[tilename,epsg,str(merc_extent[0]),str(merc_extent[1]),str(merc_extent[2]),str(merc_extent[3]),str(merc_extent[0]),str(merc_extent[1]),str(merc_extent[2]),str(merc_extent[3])])
#ok sql = "SELECT * FROM indeks WHERE name = ? AND epsg = ?;"
#ok curi.execute(sql,[tilename,epsg])
rows = curi.fetchall()
n = 0
for row in rows:
afilename = str(row[1])
ds = mapnik.Gdal(file=afilename)
layer = mapnik.Layer('raster'+str(n),'+init=epsg:'+str(epsg))
layer.datasource = ds
layer.styles.append('RStyle')
mp.layers.append(layer)
n = n+1
#xmlstr = mapnik.save_map_to_string(mp)
#print xmlstr
#mapnik.load_map_from_string(mp,xmlstr)
if atilename not in cached_maps :
cached_maps[atilename] = {}
#cached_maps[atilename][qs.q] = mp
mp.zoom_to_box(merc_extent)
im = Image(mp.width,mp.height)
mapnik.render(mp,im)
output = im.tostring('png')
if dbfilet:
minx = box[0]
miny = box[1]
maxx = box[2]
maxy = box[3]
sql = "INSERT INTO tiles VALUES (?,?,?,?,?,?,?,?,?,?);"
curt.execute(sql,[z,x,y,minx,miny,maxx,maxy,lite.Binary(zlib.compress(output)),sffx,qs.q])
cont.commit()
curt.close()
web.header("Content-Type", cType[sffx])
return output
else:
return ''
def transform(self, from_prj, to_prj):
trans = ProjTransform(from_prj, to_prj)
return trans.forward(self)
def main(argv):
b = "-180,-90,180,90"
i = ""
o = ""
l = "-1"
try:
opts, args = getopt.getopt(argv,"hb:i:o:l:",["bbox","inputXml","output","layerGrid"])
except getopt.GetoptError:
print 'tilep.py -b <bbox> -i <inputXml> -o <output> -l <layerGrid>'
sys.exit(2)
for opt, arg in opts:
if opt == '-h':
print 'tilep.py -b <bbox> -i <inputXml> -o <output> -l <layerGrid>'
sys.exit()
elif opt in ("-b", "--bbox"):
b = arg
elif opt in ("-i", "--inputXml"):
i = arg
elif opt in ("-o", "--output"):
o = arg
elif opt in ("-l", "--layerGrid"):
l = arg
box = []
for s in b.split(",") :
box.append(float(s))
geo_extent = Box2d(box[0],box[1],box[2],box[3])
geo_proj = Projection('+init=epsg:4326')
merc_proj = Projection('+init=epsg:3857')
transform = ProjTransform(geo_proj,merc_proj)
merc_extent = transform.forward(geo_extent)
mp = mapnik.Map(256,256)
#sys.exit(i)
if i.find('http') >= 0:
xmlurl=urllib2.urlopen(i)
xmlstr=xmlurl.read()
#xmlstr = '<Map srs="+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 +wktext +no_defs"><Style name="Style1"><Rule><PolygonSymbolizer fill="#ffbf00" fill-opacity="0.5"/><LineSymbolizer stroke="#ff7b00" stroke-width="1" stroke-opacity="1" stroke-linejoin="bevel"/></Rule></Style><Layer name="Layer1" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs "><StyleName>Style1</StyleName><Datasource><Parameter name="type">postgis</Parameter><Parameter name="host">localhost</Parameter><Parameter name="dbname">webgisPEP</Parameter><Parameter name="username">iyo</Parameter><Parameter name="password">SAlamaH</Parameter><Parameter name="table">(SELECT * FROM sxz51_iyo_data_6) as layer1</Parameter><Parameter name="geometry_field">the_geom</Parameter><Parameter name="srid">EPSG:4326</Parameter><Parameter name="fields">gid,nama_kebun,sk</Parameter></Datasource></Layer></Map>'
mapnik.load_map_from_string(mp,xmlstr)
xmldoc = minidom.parseString(xmlstr)
else:
mapnik.load_map(mp, i)
xmldoc = minidom.parse(i)
mp.zoom_to_box(merc_extent)
printed = 0
if o == 'png':
im = Image(mp.width,mp.height)
mapnik.render(mp,im)
fd, path = tempfile.mkstemp()
os.write(fd,im.tostring('png'))
os.fsync(fd)
print path
elif o == 'json':
printed = 1
else:
image = o+".png"
if not os.path.exists(os.path.dirname(image)):
try:
os.makedirs(os.path.dirname(image))
except:
pass
mapnik.render_to_file(mp, image)
if l == '-1':
print image
#print ((time.time())-(t0))*1000
#sys.exit()
lgrids = []
if l != '-1':
for s in l.split(",") :
lgrids.append(s)
else:
sys.exit()
itemlist = xmldoc.getElementsByTagName('Layer')
fields = []
resolution = 4 #Pixel resolution of output.
printed = 0
for lysl in lgrids :
lys = lysl.split(":")
ly = int(lys[0])
lz = ''
if (len(lys) == 2):
lz = lys[1]
dat = itemlist[ly].getElementsByTagName('Datasource')[0]
par = dat.getElementsByTagName('Parameter')
for s in par :
dv = s.attributes['name'].value
dck = False
if (dv[6:] == '' or lz == ''):
dck = True
elif (dv[6:].isdigit() and lz.isdigit()):
dck = (int(lz) >= int(dv[6:]))
if dv[:6] == 'fields' and dck and fields == [] :
text = s.childNodes[0].nodeValue.encode("utf-8")
#print "fields "+text
fields = text.split(",")
#elif dv[:6] == 'fields':
# ly = ly + 1
if dv == 'resolution':
res = s.childNodes[0].nodeValue.encode("utf-8")
#print "resolution "+res
resolution = int(res)
layer_index = ly #First layer on the map - index in m.layers
key = "__id__" #Field used for the key in mapnik (should probably be unique)
enfix = ""
if ly > 0:
enfix = "_"+str(ly)
d = mapnik.render_grid(mp, layer_index, key, resolution, fields) #returns a dictionary
d = "grid("+json.dumps(d)+")"
if o == 'json' and printed == 0:
print d
printed = 1
elif o == 'png':
printed = 1
else:
print d
f = open(o+enfix+".json",'wb')
f.write(d)
f.close()
def GET(self, tilename, z, x, y, sffx):
z = int(z)
x = int(x)
y = int(y)
if (z < 0 or z > 19):
return ''
cType = {
"png":"image/png",
"json":"text/plain"
}
qs = web.input(r='',x='',q='')
isCache = False
if qs.r == '':
isCache = True
output = False
tilep = Tilep()
web.header("Access-Control-Allow-Origin", "*")
dbfilet = tilep.getDb(tilename)
if dbfilet:
cont = lite.connect(dbfilet)
curt = cont.cursor()
if isCache and dbfilet:
if (qs.q == '') :
sql = "SELECT * from tiles WHERE z = ? AND x = ? AND y = ? AND sffx = ? AND (q is null or q = ?);"
else :
sql = "SELECT * from tiles WHERE z = ? AND x = ? AND y = ? AND sffx = ? AND q = ?;"
curt.execute(sql,[z,x,y,sffx,qs.q])
rows = curt.fetchall()
for row in rows:
output = zlib.decompress(row[7])
if output:
web.header("Content-Type", cType[sffx])
return output
if not output:
isforce = True
if qs.x == '':
isforce = False
xmlstr = tilep.getXml(tilename,isforce,qs.q)
if not xmlstr:
return ''
else:
box = tilep.getBbox(z=z,x=x,y=y)
geo_extent = Box2d(box[0],box[1],box[2],box[3])
geo_proj = Projection('+init=epsg:4326')
merc_proj = Projection('+init=epsg:3857')
transform = ProjTransform(geo_proj,merc_proj)
merc_extent = transform.forward(geo_extent)
mp = mapnik.Map(256,256)
mapnik.load_map_from_string(mp,xmlstr)
mp.zoom_to_box(merc_extent)
if sffx == 'png':
im = Image(mp.width,mp.height)
mapnik.render(mp,im)
output = im.tostring('png')
if dbfilet:
minx = box[0]
miny = box[1]
maxx = box[2]
maxy = box[3]
sql = "INSERT INTO tiles VALUES (?,?,?,?,?,?,?,?,?,?);"
curt.execute(sql,[z,x,y,minx,miny,maxx,maxy,lite.Binary(zlib.compress(output)),sffx,qs.q])
cont.commit()
curt.close()
#if zoomcache >= z :
# mapnik.render_to_file(mp, str(afile))
web.header("Content-Type", cType[sffx])
return output
elif sffx == 'json':
xmldoc = minidom.parseString(xmlstr)
itemlist = xmldoc.getElementsByTagName('Layer')
nlay = len(itemlist)
fields = []
resolution = 4 #Pixel resolution of output.
li = 0
for ly in range(0, nlay):
resolution = 4
dat = itemlist[ly].getElementsByTagName('Datasource')[0]
par = dat.getElementsByTagName('Parameter')
for s in par :
dv = s.attributes['name'].value
dck = False
if (dv[6:] == ''):
dck = True
elif (dv[6:].isdigit()):
dck = (z >= int(dv[6:]))
if dv[:6] == 'fields' and dck and fields == [] :
text = s.childNodes[0].nodeValue.encode("utf-8")
fields = text.split(",")
li = ly
if dv == 'resolution':
res = s.childNodes[0].nodeValue.encode("utf-8")
resolution = int(res)
layer_index = li #First layer on the map - index in m.layers
key = "__id__" #Field used for the key in mapnik (should probably be unique)
enfix = ""
#if ly > 0:
# enfix = "_"+str(ly)
#return str(len(fields))
if len(fields) > 0:
d = mapnik.render_grid(mp, layer_index, key, resolution, fields) #returns a dictionary
output = "grid("+json.dumps(d)+")"
else:
output = ''
if output != '':
if dbfilet:
minx = box[0]
miny = box[1]
maxx = box[2]
maxy = box[3]
sql = "INSERT INTO tiles VALUES (?,?,?,?,?,?,?,?,?,?);"
curt.execute(sql,[z,x,y,minx,miny,maxx,maxy,lite.Binary(zlib.compress(output)),sffx,qs.q])
cont.commit()
curt.close()
#if zoomcache >= z :
# f = open(afile,'wb')
# f.write(output)
# f.close()
web.header("Content-Type", cType[sffx])
return output
else:
return ''
# it to within the web mercator 'square world' if necessary.
#
# Example usage: latlon2merc.py -180 -90 180 90
import sys
from mapnik import Box2d, Coord, Projection, ProjTransform
latlon = Projection('+proj=latlong +datum=WGS84')
merc = 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 +wktext +no_defs'
)
max_4326 = 85.0511287798066
max_3785 = 20037508.3427892
transform = ProjTransform(latlon, merc)
if len(sys.argv) == 3:
ll = transform.forward(Coord(float(sys.argv[1]), float(sys.argv[2])))
if (ll.y > max_3785):
print(' '.join([str(ll.x), str(max_3785)]))
elif (ll.y < -max_3785):
print(' '.join([str(ll.x), str(-max_3785)]))
else:
print(' '.join([str(ll.x), str(ll.y)]))
elif len(sys.argv) == 5:
minx, miny, maxx, maxy = (float(sys.argv[1]), float(sys.argv[2]),
float(sys.argv[3]), float(sys.argv[4]))
if (miny < -max_4326):
# note: requires mapnik SVN r822 or greater.
# Example of reprojecting the extent for the netherlands in epsg:28992 to google mercator and then back to the original netherlands extent.
import sys
try:
from mapnik import ProjTransform, Projection, Envelope
except ImportError, E:
sys.exit('Requires Mapnik SVN r822 or greater:\n%s' % E)
# http://spatialreference.org/ref/epsg/28992/
# http://mapnik.dbsgeo.com/days/2009-01-25
amersfoort_extent = Envelope(13599.999985, 306799.999985, 277999.999985,
619299.999985)
amersfoort_proj = Projection('+init=epsg:28992')
merc_proj = 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 +wktext +no_defs'
)
transform = ProjTransform(amersfoort_proj, merc_proj)
merc_extent = transform.forward(amersfoort_extent)
if transform.backward(merc_extent).__repr__() == amersfoort_extent.__repr__():
print 'Transformation successful!'
print 'Original Dutch Extent: %s' % amersfoort_extent
print 'Merc Extent: %s' % merc_extent
else:
print 'Reprojection failure...'
def transform(self,from_prj,to_prj):
trans = ProjTransform(from_prj,to_prj)
return trans.forward(self)
# Converts a latlon coordinate or bounding box to web mercator, moving/cropping
# it to within the web mercator 'square world' if necessary.
#
# Example usage: latlon2merc.py -180 -90 180 90
import sys
from mapnik import Box2d, Coord, Projection, ProjTransform
latlon = Projection('+proj=latlong +datum=WGS84')
merc = 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 +wktext +no_defs')
max_4326 = 85.0511287798066
max_3785 = 20037508.3427892
transform = ProjTransform(latlon, merc)
if len(sys.argv) == 3:
ll = transform.forward(Coord(float(sys.argv[1]), float(sys.argv[2])))
if (ll.y > max_3785):
print(' '.join([str(ll.x), str(max_3785)]))
elif (ll.y < -max_3785):
print(' '.join([str(ll.x), str(-max_3785)]))
else:
print(' '.join([str(ll.x), str(ll.y)]))
elif len(sys.argv) == 5:
minx, miny, maxx, maxy = (
float(sys.argv[1]),
float(sys.argv[2]),
float(sys.argv[3]),
def main(argv):
b = "-180,-90,180,90"
i = ""
o = ""
l = "0"
try:
opts, args = getopt.getopt(argv,"hb:i:o:l:",["bbox","inputXml","output","layerGrid"])
except getopt.GetoptError:
print 'tilep.py -b <bbox> -i <inputXml> -o <output> -l <layerGrid>'
sys.exit(2)
for opt, arg in opts:
if opt == '-h':
print 'tilep.py -b <bbox> -i <inputXml> -o <output> -l <layerGrid>'
sys.exit()
elif opt in ("-b", "--bbox"):
b = arg
elif opt in ("-i", "--inputXml"):
i = arg
elif opt in ("-o", "--output"):
o = arg
elif opt in ("-l", "--layerGrid"):
l = arg
if not os.path.exists(os.path.dirname(o+".png")):
os.makedirs(os.path.dirname(o+".png"))
box = []
for s in b.split(",") :
box.append(float(s))
geo_extent = Box2d(box[0],box[1],box[2],box[3])
lgrids = []
for s in l.split(",") :
lgrids.append(int(s))
geo_proj = Projection('+init=epsg:4326')
merc_proj = Projection('+init=epsg:3857')
transform = ProjTransform(geo_proj,merc_proj)
merc_extent = transform.forward(geo_extent)
image = o+".png"
mp = mapnik.Map(256,256)
mapnik.load_map(mp, i)
mp.zoom_to_box(merc_extent)
mapnik.render_to_file(mp, image)
print "rendered image to '%s'" % image
xmldoc = minidom.parse(i)
itemlist = xmldoc.getElementsByTagName('Layer')
for ly in lgrids :
dat = itemlist[ly].getElementsByTagName('Datasource')[0]
par = dat.getElementsByTagName('Parameter')
for s in par :
if s.attributes['name'].value == 'fields':
text = s.childNodes[0].nodeValue.encode("utf-8")
fields = text.split(",")
layer_index = ly #First layer on the map - index in m.layers
key = "__id__" #Field used for the key in mapnik (should probably be unique)
resolution = 4 #Pixel resolution of output.
enfix = ""
if ly > 0:
enfix = "_"+ly
d = mapnik.render_grid(mp, layer_index, key, resolution, fields) #returns a dictionary
d = "grid("+json.dumps(d)+")"
f = open(o+enfix+".json",'wb')
f.write(d)
f.close()
