Python Rule.filter示例

示例#1

文件： render_cairo_svg_france.py 项目： ThomasG77/presentation_ipython_par_exemple

m = Map(300, 300, proj4)

m.background = Color('steelblue')

t = TextSymbolizer(Expression('[CODE_DEPT]'), 'DejaVu Sans Book', 8,
                   Color('black'))

f = Expression(
    "[CODE_DEPT]<>'75' and [CODE_DEPT]<>'92' and [CODE_DEPT]<>'93' and [CODE_DEPT]<>'94'"
)
t.allow_overlap = 1
t.label_placement = label_placement.POINT_PLACEMENT
s1 = Style()
r1 = Rule()
r1.symbols.append(t)
r1.filter = f
s1.rules.append(r1)
m.append_style('Text', s1)

s = Style()
r = Rule()
r.symbols.append(PolygonSymbolizer(Color('#f2eff9')))
r.symbols.append(LineSymbolizer(Color('rgb(50%,50%,50%)'), 0.1))
s.rules.append(r)
m.append_style('My Style', s)

lyr = Layer('france', proj4)
import os

shp = Shapefile(base='.', file='departement')

示例#2

文件： render_cairo_svg_france.py 项目： AFPy/python-nantes

from mapnik import Style, Rule, Color, Filter, LineSymbolizer, PolygonSymbolizer, TextSymbolizer, label_placement, Shapefile, SQLite, Layer, Map, render, Shapefile, Expression, save_map

map_output = 'france'
m = Map(300, 300, proj4)

m.background = Color('steelblue')

t = TextSymbolizer(Expression('[CODE_DEPT]'), 'DejaVu Sans Book', 8, Color('black'))

f = Expression("[CODE_DEPT]<>'75' and [CODE_DEPT]<>'92' and [CODE_DEPT]<>'93' and [CODE_DEPT]<>'94'")
t.allow_overlap = 1
t.label_placement = label_placement.POINT_PLACEMENT
s1 = Style()
r1 = Rule()
r1.symbols.append(t)
r1.filter = f
s1.rules.append(r1)
m.append_style('Text', s1)

s = Style()
r = Rule()
r.symbols.append(PolygonSymbolizer(Color('#f2eff9')))
r.symbols.append(LineSymbolizer(Color('rgb(50%,50%,50%)'), 0.1))
s.rules.append(r)
m.append_style('My Style', s)

lyr = Layer('france', proj4)
import os

shp = Shapefile(base='.',file='departement') 

示例#3

文件： render_cairo_svg_france_theme.py 项目： ThomasG77/mapnik2raphael

def basic_chloropleth_class(s, def_filter, color = Color(255, 0, 0)):
    r = Rule()
    r.filter = Expression(def_filter)
    r.symbols.append(PolygonSymbolizer(color))
    s.rules.append(r)
    return s