mapnik渲染raster tiff栅格图

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原创最新推荐文章于 2026-06-15 10:08:36 发布 2.6k 阅读 AI 写同款· GEO 优化 ›

Mapnik简介与安装 Mapnik is an open source toolkit for developing mapping applications. At the core is a C++ shared library providing algorithms and patterns for spatial data access and visualization. Mapnik is basically a collection of geographic objects like maps, layers 阅读详情

之前的文章写了怎么渲染shp格式的矢量地图，这里记录下怎么渲染栅格图tiff格式。

0.环境配置参考

1.mapnik的demo运行
2.python支持下的mapnik安装
3.几个shape格式、tiff格式地图免费下载网站
4.vc调用python接口操作mapnik
5.python操作多个图层的mapnik

1.需要的文件

1.shp格式1:50m全球海岸线
2.1:50m全球栅格图
注意
文件下载后解压缩的文件名为数字开头，并且有下划线，这些在python里做文件路径的时候跟在\后，容易形成转义字符，这里为了方便，改成Coastline.shp Coastline.tiff

2.python代码

import mapnik
#----------create map---------------------
m = mapnik.Map(10800,5400);

m.background = mapnik.Color('white');
#----------create layer 1-----------------
SHP_layer = mapnik.Layer('SHP');
#----------create layer 1 datasource------
SHP_layer.datasource = mapnik.Shapefile(file='C:\coastline\coastline.shp');
#----------get layer 1 style & rule------
SHP_style = mapnik.Style();
SHP_rule = mapnik.Rule();
#----------set layer 1 Polygon & Line color------
SHP_rule.symbols.append(mapnik.PolygonSymbolizer(mapnik.Color('#FFF5EE')));
SHP_rule.symbols.append(mapnik.LineSymbolizer(mapnik.Color('rgb(50%,50%,50%)'),0.1));
#----------set layer 1 style & rule------
SHP_style.rules.append(SHP_rule);
#----------append layer 1 style----------
m.append_style('SHP Style',SHP_style);
SHP_layer.styles.append('SHP Style');
#----------append layer1 to map----------
m.layers.append(SHP_layer);




#----------create layer 2-----------------
RASTER_layer = mapnik.Layer('RASTER');
#----------create layer 2 datasource------
RASTER_layer.datasource = mapnik.Gdal(file='C:\coastline\coastline.tif',band = 1);
RASTER_style = mapnik.Style();
RASTER_rule = mapnik.Rule();
RASTERsym = mapnik.RasterSymbolizer();
RASTERsym.colorizer = mapnik.RasterColorizer(mapnik.COLORIZER_DISCRETE  ,mapnik.Color("transparent"))

for value, color in [
                ( 20, "#7FFFD4"),           
                ( 30, "#76EEC6"),           
                ( 40, "#66CDAA"),
                ( 50, "#458B74"),               
                ( 60, "#DAA520"),           
                ( 70, "#EEDD82"),           
                ( 80, "#7FFFD4"),
                ( 90, "#76EEC6"),
                ( 100, "#66CDAA"),
                ( 110, "#458B74"),            
                ( 200, "transparent"),
        ]:
            RASTERsym.colorizer.add_stop(value, mapnik.Color(color))
RASTER_rule.symbols.append(RASTERsym);
RASTER_style.rules.append(RASTER_rule);
#----------append layer 1 style----------
m.append_style('RASTER Style',RASTER_style);
RASTER_layer.styles.append('RASTER Style');

#----------append layer 2 to map----------
m.layers.append(RASTER_layer);


m.zoom_all();

mapnik.render_to_file(m,"SHPandRASTER.png", 'png');