def test_textsymbolizer_init():
ts = mapnik2.TextSymbolizer(mapnik2.Expression('[Field_Name]'), 'Font Name', 8, mapnik2.Color('black'))
eq_(str(ts.name), str(mapnik2.Expression('[Field_Name]')))
eq_(ts.face_name, 'Font Name')
eq_(ts.text_size, 8)
eq_(ts.fill, mapnik2.Color('black'))
eq_(ts.label_placement, mapnik2.label_placement.POINT_PLACEMENT)
def test_shieldsymbolizer_init():
s = mapnik2.ShieldSymbolizer(
mapnik2.Expression('[Field Name]'), 'DejaVu Sans Bold', 6,
mapnik2.Color('#000000'),
mapnik2.PathExpression('../data/images/dummy.png'))
eq_(s.anchor, (
0.0,
0.5,
))
eq_(s.displacement, (0.0, 0.0))
eq_(s.allow_overlap, False)
eq_(s.avoid_edges, False)
eq_(s.character_spacing, 0)
eq_(str(s.name), str(mapnik2.Expression('[Field Name]')))
eq_(s.face_name, 'DejaVu Sans Bold')
eq_(s.allow_overlap, False)
eq_(s.fill, mapnik2.Color('#000000'))
eq_(s.force_odd_labels, False)
eq_(s.halo_fill, mapnik2.Color('rgb(255,255,255)'))
eq_(s.halo_radius, 0)
eq_(s.label_placement, mapnik2.label_placement.POINT_PLACEMENT)
eq_(s.minimum_distance, 0.0)
eq_(s.text_ratio, 0)
eq_(s.text_size, 6)
eq_(s.wrap_width, 0)
eq_(s.vertical_alignment, mapnik2.vertical_alignment.MIDDLE)
eq_(s.label_spacing, 0)
eq_(s.label_position_tolerance, 0)
# 22.5 * M_PI/180.0 initialized by default
assert_almost_equal(s.max_char_angle_delta, 0.39269908169872414)
eq_(s.wrap_character, ' ')
eq_(s.text_transform, mapnik2.text_transform.NONE)
eq_(s.line_spacing, 0)
eq_(s.character_spacing, 0)
# r1341
eq_(s.wrap_before, False)
eq_(s.horizontal_alignment, mapnik2.horizontal_alignment.MIDDLE)
eq_(s.justify_alignment, mapnik2.justify_alignment.MIDDLE)
eq_(s.opacity, 1.0)
# r2300
eq_(s.minimum_padding, 0.0)
# was mixed with s.opacity
eq_(s.text_opacity, 1.0)
eq_(s.shield_displacement, (0.0, 0.0))
# TODO - the pattern in bindings seems to be to get/set
# strings for PathExpressions... should we pass objects?
eq_(s.filename, '../data/images/dummy.png')
eq_(s.transform, 'matrix(1, 0, 0, 1, 0, 0)')
raise Todo(
"FontSet pickling support needed: http://trac.mapnik2.org/ticket/348")
eq_(s.fontset, '')
def test_renders_with_agg():
sym = mapnik2.GlyphSymbolizer("DejaVu Sans Condensed",
mapnik2.Expression("'í'"))
sym.allow_overlap = True
sym.angle = mapnik2.Expression(
"[azimuth]+90") #+90 so the top of the glyph points upwards
sym.size = mapnik2.Expression("[value]")
sym.color = mapnik2.Expression("'#ff0000'")
_map = create_map_and_append_symbolyzer(sym)
im = mapnik2.Image(_map.width, _map.height)
mapnik2.render(_map, im)
save_data('agg_glyph_symbolizer.png', im.tostring('png'))
assert contains_word('\xff\x00\x00\xff', im.tostring())
def test_textsymbolizer_pickle():
ts = mapnik2.TextSymbolizer(mapnik2.Expression('[Field_Name]'),
'Font Name', 8, mapnik2.Color('black'))
eq_(str(ts.name), str(mapnik2.Expression('[Field_Name]')))
eq_(ts.face_name, 'Font Name')
eq_(ts.text_size, 8)
eq_(ts.fill, mapnik2.Color('black'))
raise Todo("text_symbolizer pickling currently disabled")
ts2 = pickle.loads(pickle.dumps(ts, pickle.HIGHEST_PROTOCOL))
eq_(ts.name, ts2.name)
eq_(ts.face_name, ts2.face_name)
eq_(ts.allow_overlap, ts2.allow_overlap)
eq_(ts.displacement, ts2.displacement)
eq_(ts.anchor, ts2.anchor)
eq_(ts.fill, ts2.fill)
eq_(ts.force_odd_labels, ts2.force_odd_labels)
eq_(ts.halo_fill, ts2.halo_fill)
eq_(ts.halo_radius, ts2.halo_radius)
eq_(ts.label_placement, ts2.label_placement)
eq_(ts.minimum_distance, ts2.minimum_distance)
eq_(ts.text_ratio, ts2.text_ratio)
eq_(ts.text_size, ts2.text_size)
eq_(ts.wrap_width, ts2.wrap_width)
eq_(ts.vertical_alignment, ts2.vertical_alignment)
eq_(ts.label_spacing, ts2.label_spacing)
eq_(ts.label_position_tolerance, ts2.label_position_tolerance)
# 22.5 * M_PI/180.0 initialized by default
assert_almost_equal(s.max_char_angle_delta, 0.39269908169872414)
eq_(ts.wrap_character, ts2.wrap_character)
eq_(ts.text_transform, ts2.text_transform)
eq_(ts.line_spacing, ts2.line_spacing)
eq_(ts.character_spacing, ts2.character_spacing)
# r1341
eq_(ts.wrap_before, ts2.wrap_before)
eq_(ts.horizontal_alignment, ts2.horizontal_alignment)
eq_(ts.justify_alignment, ts2.justify_alignment)
eq_(ts.opacity, ts2.opacity)
# r2300
eq_(s.minimum_padding, 0.0)
raise Todo(
"FontSet pickling support needed: http://trac.mapnik2.org/ticket/348")
eq_(ts.fontset, ts2.fontset)
def ogc_TextSymbolizer_to_mapnik(text):
name = text.Label.find("{%s}PropertyName" % rule.nsmap['ogc'])
if not name and hasattr(text, 'Label'):
name = shlex.split(str(text.Label))[0]
#face_name = '[%s]' % text.Font
face_name = 'DejaVu Sans Book'
size = 10
for css in text.Font.CssParameter:
if css.get('name') == 'font-family':
face_name = css.text
elif css.get('name') == 'font-size':
size = int(float(css.text))
color = mapnik.Color('black')
for css in text.Fill.CssParameter:
if css.get('name') == 'fill':
color = mapnik.Color(css.text)
m_text = mapnik.TextSymbolizer(mapnik.Expression('[%s]' % name),
str(face_name), int(size), color)
if hasattr(text, 'LabelPlacement'):
if hasattr(text.LabelPlacement, 'LinePlacement'):
m_text.label_placement = mapnik.label_placement.LINE_PLACEMENT
if hasattr(text, 'Halo'):
h = text.Halo
if hasattr(h, 'Radius'):
m_text.halo_radius = float(h.Radius)
if hasattr(h, 'Fill'):
for css in h.Fill.CssParameter:
if css.get('name') == 'fill':
m_text.halo_fill = mapnik.Color(css.text)
yield m_text
def create_grid_map(width,height):
places_ds = mapnik2.PointDatasource()
places_ds.add_point(143.10,-38.60,'Name','South East')
places_ds.add_point(142.48,-38.60,'Name','South West')
places_ds.add_point(142.48,-38.38,'Name','North West')
places_ds.add_point(143.10,-38.38,'Name','North East')
s = mapnik2.Style()
r = mapnik2.Rule()
#symb = mapnik2.PointSymbolizer()
symb = mapnik2.MarkersSymbolizer()
symb.allow_overlap = True
r.symbols.append(symb)
label = mapnik2.TextSymbolizer(mapnik2.Expression('[Name]'),
'DejaVu Sans Book',
10,
mapnik2.Color('black')
)
label.allow_overlap = True
label.displacement = (0,-10)
#r.symbols.append(label)
s.rules.append(r)
lyr = mapnik2.Layer('Places')
lyr.datasource = places_ds
lyr.styles.append('places_labels')
m = mapnik2.Map(width,height)
m.append_style('places_labels',s)
m.layers.append(lyr)
return m
def test_render_grid():
places_ds = mapnik2.PointDatasource()
places_ds.add_point(143.10, -38.60, 'Name', 'South East')
places_ds.add_point(142.48, -38.60, 'Name', 'South West')
places_ds.add_point(142.48, -38.38, 'Name', 'North West')
places_ds.add_point(143.10, -38.38, 'Name', 'North East')
s = mapnik2.Style()
r = mapnik2.Rule()
#symb = mapnik2.PointSymbolizer()
symb = mapnik2.MarkersSymbolizer()
symb.allow_overlap = True
r.symbols.append(symb)
label = mapnik2.TextSymbolizer(mapnik2.Expression('[Name]'),
'DejaVu Sans Book', 10,
mapnik2.Color('black'))
label.allow_overlap = True
label.displacement = (0, -10)
#r.symbols.append(label)
s.rules.append(r)
lyr = mapnik2.Layer('Places')
lyr.datasource = places_ds
lyr.styles.append('places_labels')
m = mapnik2.Map(256, 256)
m.append_style('places_labels', s)
m.layers.append(lyr)
ul_lonlat = mapnik2.Coord(142.30, -38.20)
lr_lonlat = mapnik2.Coord(143.40, -38.80)
m.zoom_to_box(mapnik2.Box2d(ul_lonlat, lr_lonlat))
grid = mapnik2.render_grid(m, 0, key='Name', resolution=4, fields=['Name'])
eq_(grid, grid_correct)
eq_(resolve(grid, 0, 0), None)
# check every pixel of the nw symbol
expected = {"Name": "North West"}
# top row
eq_(resolve(grid, 23, 9), expected)
eq_(resolve(grid, 23, 10), expected)
eq_(resolve(grid, 23, 11), expected)
# core
eq_(resolve(grid, 24, 8), expected)
eq_(resolve(grid, 24, 9), expected)
eq_(resolve(grid, 24, 10), expected)
eq_(resolve(grid, 24, 11), expected)
eq_(resolve(grid, 24, 12), expected)
eq_(resolve(grid, 25, 8), expected)
eq_(resolve(grid, 25, 9), expected)
eq_(resolve(grid, 25, 10), expected)
eq_(resolve(grid, 25, 11), expected)
eq_(resolve(grid, 25, 12), expected)
# bottom row
eq_(resolve(grid, 26, 9), expected)
eq_(resolve(grid, 26, 10), expected)
eq_(resolve(grid, 26, 11), expected)
def test_renders_with_cairo():
if not mapnik2.has_pycairo():
return
sym = mapnik2.GlyphSymbolizer("DejaVu Sans Condensed",
mapnik2.Expression("'í'"))
sym.allow_overlap = True
sym.angle = mapnik2.Expression(
"[azimuth]+90") #+90 so the top of the glyph points upwards
sym.size = mapnik2.Expression("[value]")
sym.color = mapnik2.Expression("'#ff0000'")
_map = create_map_and_append_symbolyzer(sym)
from cStringIO import StringIO
import cairo
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 256, 256)
mapnik2.render(_map, surface)
im = mapnik2.Image.from_cairo(surface)
save_data('cairo_glyph_symbolizer.png', im.tostring('png'))
assert contains_word('\xff\x00\x00\xff', im.tostring())
def to_mapnik(self):
sym = mapnik.ShieldSymbolizer(
mapnik.Expression(self.name), self.face_name, self.size,
mapnik.Color(str(self.color)) if self.color else None, self.file,
self.type, self.width, self.height)
sym.character_spacing = self.character_spacing or sym.character_spacing
sym.line_spacing = self.line_spacing or sym.line_spacing
sym.spacing = self.spacing or sym.line_spacing
sym.minimum_distance = self.min_distance or sym.minimum_distance
return sym
def to_mapnik(self):
sym = mapnik.TextSymbolizer(mapnik.Expression(self.name),
self.face_name, self.size,
mapnik.Color(str(self.color)))
sym.wrap_width = self.wrap_width or sym.wrap_width
sym.label_spacing = self.spacing or sym.label_spacing
sym.label_position_tolerance = self.label_position_tolerance or sym.label_position_tolerance
sym.max_char_angle_delta = self.max_char_angle_delta or sym.max_char_angle_delta
sym.halo_fill = mapnik.Color(str(
self.halo_color)) if self.halo_color else sym.halo_fill
sym.halo_radius = self.halo_radius or sym.halo_radius
sym.character_spacing = self.character_spacing or sym.character_spacing
sym.line_spacing = self.line_spacing or sym.line_spacing
sym.avoid_edges = self.avoid_edges.value if self.avoid_edges else sym.avoid_edges
sym.minimum_distance = self.min_distance or sym.minimum_distance
sym.allow_overlap = self.allow_overlap.value if self.allow_overlap else sym.allow_overlap
sym.text_transform = self.text_transform if self.text_transform else sym.text_transform
sym.displacement(self.dx or 0, self.dy or 0)
return sym
def ogc_filter_to_mapnik(ogc_filter):
if hasattr(ogc_filter,'PropertyIsGreaterThan'):
prop = ogc_filter.PropertyIsGreaterThan
operator = '>'
#cql = "[%s] > %s" % (prop.PropertyName,prop.Literal)
elif hasattr(ogc_filter,'PropertyIsLessThan'):
prop = ogc_filter.PropertyIsLessThan
operator = '<'
elif hasattr(ogc_filter,'PropertyIsEqualTo'):
prop = ogc_filter.PropertyIsEqualTo
operator = '='
elif hasattr(ogc_filter,'PropertyIsNotEqualTo'):
prop = ogc_filter.PropertyIsNotEqualTo
operator = '!='
if is_number(prop.Literal.text):
cql = "[%s] %s %s" % (prop.PropertyName,operator,prop.Literal)
else:
cql = "[%s] %s '%s'" % (prop.PropertyName,operator,prop.Literal.text)
if mapnik.mapnik_version() >= 800:
return mapnik.Expression(str(cql))
else:
return mapnik.Filter(str(cql))
def create_map_and_append_symbolyzer(sym):
srs = '+init=epsg:32630'
lyr = mapnik2.Layer('arrows')
lyr.datasource = mapnik2.Shapefile(file='../data/shp/arrows.shp', )
lyr.srs = srs
_map = mapnik2.Map(256, 256, srs)
style = mapnik2.Style()
rule = mapnik2.Rule()
rule.symbols.append(sym)
# put a test symbolizer to see what is the azimuth being read
ts = mapnik2.TextSymbolizer(mapnik2.Expression('[azimuth]'),
"DejaVu Sans Book", 10, mapnik2.Color("black"))
ts.allow_overlap = True
rule.symbols.append(ts)
style.rules.append(rule)
_map.append_style('foo', style)
lyr.styles.append('foo')
_map.layers.append(lyr)
_map.zoom_to_box(mapnik2.Box2d(0, 0, 8, 8))
return _map
def test_unicode_regex_match():
f = mapnik2.Feature(0)
f["name"] = 'Québec'
expr = mapnik2.Expression("[name].match('Québec')")
eq_(expr.evaluate(f), '1') # 1 == True
def test_unicode_regex_replace():
f = mapnik2.Feature(0)
f["name"] = 'Québec'
expr = mapnik2.Expression("[name].replace('(\B)|( )','$1 ')")
eq_(expr.evaluate(f), 'Q u é b e c')
def main(root,**options):
m = mapnik.Map(1,1)
idx = 0
layers = []
if hasattr(root,'NamedLayer'):
layers.extend(root.NamedLayer)
if hasattr(root,'UserLayer'):
layers.extend(root.UserLayer)
for layer in layers:
lyr = mapnik.Layer(str(getattr(layer,'Name',None) or 'Layer'))
datasource = options.get('datasource')
if datasource and datasource.endswith('shp'):
shp_dir = os.path.abspath(datasource).split('.shp')[0]
name = datasource.split('.shp')[0]
lyr.datasource = mapnik.Shapefile(file=shp_dir)
if options.get('srid'):
lyr.srs = '+init=epsg:%s' % options.get('srid')
m.srs = lyr.srs
else:
srs = proj4_from_osr(shp_dir)
if srs:
lyr.srs = srs
for user_style in layer.UserStyle:
for feature_style in user_style.FeatureTypeStyle:
m_sty = mapnik.Style()
# TODO = Styles should have title,abstract, etc...
sty_name = getattr(feature_style,'Name',None)
if not sty_name:
sty_name = '%s %s' % (lyr.name,str(idx))
sty_name = str(sty_name)
for rule in feature_style.Rule:
#print rule.get_childen()
m_rule = mapnik.Rule(str(getattr(rule,'Name','')))
ogc_filter = rule.find("{%s}Filter" % rule.nsmap['ogc'])
if ogc_filter is not None:
# TODO - support ogc:And and oc:Or
m_rule.filter = ogc_filter_to_mapnik(ogc_filter)
else:
if hasattr(rule,'ElseFilter'):
m_rule.set_else(True)
if hasattr(rule,'MaxScaleDenominator'):
m_rule.max_scale = float(rule.MaxScaleDenominator)
if hasattr(rule,'MinScaleDenominator'):
m_rule.min_scale = float(rule.MinScaleDenominator)
if hasattr(rule,'LineSymbolizer'):
stroke = rule.LineSymbolizer.Stroke
m_stroke = stroke_to_mapnik(stroke)
m_rule.symbols.append(mapnik.LineSymbolizer(m_stroke))
if hasattr(rule,'PolygonSymbolizer'):
m_poly = mapnik.PolygonSymbolizer()
if hasattr(rule.PolygonSymbolizer,'Fill'):
fill = rule.PolygonSymbolizer.Fill
for css in fill.CssParameter:
if css.get('name') == 'fill':
m_poly.fill = mapnik.Color(css.text)
elif css.get('name') == 'fill-opacity':
m_poly.opacity = float(css.text)
else:
raise Exception('unhanded: ' + css.get('name'))
if hasattr(rule.PolygonSymbolizer,'Stroke'):
stroke = rule.PolygonSymbolizer.Stroke
m_stroke = stroke_to_mapnik(stroke)
m_rule.symbols.append(mapnik.LineSymbolizer(m_stroke))
m_rule.symbols.append(m_poly)
if hasattr(rule,'PointSymbolizer'):
#fill = rule.PolygonSymbolizer.Fill
#m_point = point_to_mapnik(point)
# TODO
m_rule.symbols.append(mapnik.PointSymbolizer())
if hasattr(rule,'TextSymbolizer'):
text = rule.TextSymbolizer
name = text.Label.find("{%s}PropertyName" % rule.nsmap['ogc'])
if not name and hasattr(text,'Label'):
name = shlex.split(str(text.Label))[0]
face_name = '[%s]' % text.Font
face_name = 'DejaVu Sans Book'
size = 10
for css in text.Font.CssParameter:
if css.get('name') == 'font-family':
face_name = css.text
elif css.get('name') == 'font-size':
size = int(float(css.text))
color = mapnik.Color('black')
for css in text.Fill.CssParameter:
if css.get('name') == 'fill':
color = mapnik.Color(css.text)
m_text = mapnik.TextSymbolizer(mapnik.Expression('['+str(name)+']'),str(face_name),int(size),color)
if hasattr(text,'LabelPlacement'):
if hasattr(text.LabelPlacement,'LinePlacement'):
m_text.label_placement = mapnik.label_placement.LINE_PLACEMENT
if hasattr(text,'Halo'):
h = text.Halo
if hasattr(h,'Radius'):
m_text.halo_radius = float(h.Radius)
if hasattr(h,'Fill'):
for css in h.Fill.CssParameter:
if css.get('name') == 'fill':
m_text.halo_fill = mapnik.Color(css.text)
m_rule.symbols.append(m_text)
m_sty.rules.append(m_rule)
lyr.styles.append(sty_name)
m.append_style(sty_name,m_sty)
idx+= 1
m.layers.append(lyr)
if FIX_HEX:
(handle, path) = tempfile.mkstemp(suffix='.xml', prefix='geotools2mapnik-')
os.close(handle)
open(path,'w').write(mapnik.save_map_to_string(m))
tree = objectify.parse(path)
fix_colors(tree)
print etree.tostring(tree)#,pretty_print=True)
else:
print mapnik.save_map_to_string(m)
def mapnik_rendering(f_pct,f_vct,f_render):
import mapnik2 as mapnik
ref_pct = GR.geo_raster.open(f_pct)
proj = ref_pct.projection
tr = ref_pct.geo_transform
width = ref_pct.width
height = ref_pct.height
size_p = tr[1]
minx = tr[0]
maxy = tr[3]
miny = tr[3] - height * size_p
maxx = tr[0] + width * size_p
bbox = (minx, miny, maxx, maxy)
#---- init
_map = mapnik.Map(width,height)
_map.background = mapnik.Color('black')
#----==== raster
style_gdal = mapnik.Style() # style object to hold rules
rule_gdal = mapnik.Rule() # rule object to hold symbolizers
symbol_gdal = mapnik.RasterSymbolizer()
#symbol_gdal.opacity = 0.5
#$symbol_gdal.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_INHERIT, mapnik.Color(255,255,255))
c = mapnik.RasterColorizer( mapnik.COLORIZER_LINEAR , mapnik.Color(0,0,0) )
c.epsilon = 0.001
c.add_stop(0)
c.add_stop(900, mapnik.COLORIZER_LINEAR, mapnik.Color("#F3DDB4"))
c.add_stop(1300, mapnik.COLORIZER_LINEAR, mapnik.Color("cyan"))
c.add_stop(2000, mapnik.COLORIZER_LINEAR, mapnik.Color("white"))
#c.get_color(2000)
#c.stops[1].color
#'''
symbol_gdal.colorizer = c
rule_gdal.symbols.append(symbol_gdal)
style_gdal.rules.append(rule_gdal)
_map.append_style("Raster Style", style_gdal)
mlyr_gdal = mapnik.Layer('TM_images')
mlyr_gdal.datasource = mapnik.Gdal(file=f_pct,band=1,bbox=bbox)
#mlyr_gdal.srs = '+proj=utm +zone=46 +ellps=WGS84 +units=m +no_defs '
mlyr_gdal.styles.append('Raster Style')
_map.layers.append(mlyr_gdal)
#'''
#----==== shape
style_vct = mapnik.Style() # style object to hold rules
rule_vct = mapnik.Rule() # rule object to hold symbolizers
#==== ==== add labels
symbol_text = mapnik.TextSymbolizer(mapnik.Expression('[Code_uniq]'), 'DejaVu Sans Book', 20, mapnik.Color('black'))
symbol_text.halo_fill = mapnik.Color('white')
symbol_text.halo_radius = 1
symbol_text.avoid_edges = True
#symbol_text.allow_overlap = False
symbol_text.vertical_alignment = mapnik.vertical_alignment.TOP
symbol_text.label_placement = mapnik.label_placement.POINT_PLACEMENT #LINE_PLACEMENT # is default
rule_vct.symbols.append(symbol_text)
#==== ==== 1.add polygon
symbol_vct = mapnik.PolygonSymbolizer(mapnik.Color('#059BFF'))
symbol_vct.opacity = 1#0.6
rule_vct.symbols.append(symbol_vct) # add the symbolizer to the rule object
#==== ==== 2.add outlines
line_symbolizer = mapnik.LineSymbolizer(mapnik.Color('black'),0.3)
rule_vct.symbols.append(line_symbolizer) # add the symbolizer to the rule object
style_vct.rules.append(rule_vct) # now add the rule to the style and we're done
_map.append_style('vector',style_vct) # Styles are given names only as they are applied to the map
ds_shp = mapnik.Shapefile(file=f_vct)
mlyr_shp = mapnik.Layer('lakes')
mlyr_shp.datasource = ds_shp
mlyr_shp.styles.append('vector')
_map.layers.append(mlyr_shp)
#'''
_map.zoom_all()
# Write the data to a png image called world.png the current directory
mapnik.render_to_file(_map,f_render, 'png')
print f_render
def ogc_filter_to_mapnik(ogc_filter):
cql = _ogc_filter_to_expression(ogc_filter.getchildren()[0])
if mapnik.mapnik_version() >= 800:
return mapnik.Expression(str(cql))
else:
return mapnik.Filter(str(cql))
# center of the image
label_x = xmin + ((xmax - xmin) / 2)
# bottom of the image
label_y = ymin + ((ymax - ymin) / 30)
# create PointDatasource
pds = mapnik2.PointDatasource()
# place scale at the bottom-center of the map
pds.add_point(label_x, label_y, 'Name', "Scale: 1:" + str(m.scale_denominator()))
# create label symbolizers
if mapnik2.mapnik_version() >= 800:
text = mapnik2.TextSymbolizer(mapnik2.Expression('[Name]'),'DejaVu Sans Bold',12,mapnik2.Color('black'))
else:
text = mapnik2.TextSymbolizer('Name','DejaVu Sans Bold',12,mapnik2.Color('black'))
s3 = mapnik2.Style()
r3 = mapnik2.Rule()
r3.symbols.append(text)
s3.rules.append(r3)
lyr3 = mapnik2.Layer('Memory Datasource')
lyr3.datasource = pds
lyr3.styles.append('Style')
m.layers.append(lyr3)
m.append_style('Style',s3)
###
# center of the image
label_x = xmin + ((xmax - xmin) / 2)
# bottom of the image
label_y = ymin + ((ymax - ymin) / 30)
# create PointDatasource
pds = mapnik2.PointDatasource()
# place scale at the bottom-center of the map
pds.add_point(label_x, label_y, 'Name',
"Scale: 1:" + str(m.scale_denominator()))
# create label symbolizers
if mapnik2.mapnik_version() >= 800:
text = mapnik2.TextSymbolizer(mapnik2.Expression('[Name]'),
'DejaVu Sans Bold', 12,
mapnik2.Color('black'))
else:
text = mapnik2.TextSymbolizer('Name', 'DejaVu Sans Bold', 12,
mapnik2.Color('black'))
s3 = mapnik2.Style()
r3 = mapnik2.Rule()
r3.symbols.append(text)
s3.rules.append(r3)
lyr3 = mapnik2.Layer('Memory Datasource')
lyr3.datasource = pds
lyr3.styles.append('Style')
m.layers.append(lyr3)
# will be drawn entirely "above" the previous one. Performance wise using
# multiple styles in one layer is the same has having multiple layers.
# The paradigm is useful mostly as a convenience.
provpoly_style = mapnik2.Style()
# A Style needs one or more rules. A rule will normally consist of a filter
# for feature selection, and one or more symbolizers.
provpoly_rule_on = mapnik2.Rule()
# A Expression() allows the selection of features to which the symbology will
# be applied. More on Mapnik expressions can be found in Tutorial #2.
# A given feature can only match one filter per rule per style.
provpoly_rule_on.filter = mapnik2.Expression("[NAME_EN] = 'Ontario'")
# Here a symbolizer is defined. Available are:
# - LineSymbolizer(Color(),<width>)
# - LineSymbolizer(Stroke())
# - PolygonSymbolizer(Color())
# - PointSymbolizer(<file>,<type>,<width>,<height>)
# Some of them can accept a Color() instance, which can be created with:
# - Color(<red>, <green>, <blue>)
# - Color(<red>, <green>, <blue>, <alpha>)
# - Color(<string>) where <string> will be something like '#00FF00'
# or '#0f0' or 'green'
provpoly_rule_on.symbols.append(
mapnik2.PolygonSymbolizer(mapnik2.Color(250, 190, 183)))
