#mapnik

[wousma]

PostGIS clustering

[thomasguesnon]

[nikolajsobolevgbc-blog]

italia mapnik 13 zip

Download italia mapnik 13 zip

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[fedorpopovdevnw-blog]

italia mapnik 13 zip

italia mapnik 13 zip

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[dgk-su]

[techfindin]

Mapnik: Surely a Mapping Toolkit to use

Mapnik[http://mapnik.org]

Mapnik is a Free Toolkit for developing mapping applications. It’s written in C++ and there are Python bindings to facilitate fast-paced agile development. It can comfortably be used for both desktop and web development, which was something I wanted from the beginning.

Mapnik is about making beautiful maps. It uses the AGG library and offers world class anti-aliasing rendering with subpixel accuracy for geographic data. It is written from scratch in modern C++ and doesn’t suffer from design decisions made a decade ago. When it comes to handling common software tasks such as memory management, filesystem access, regular expressions, parsing and so on, Mapnik doesn’t re-invent the wheel, but utilizes best of breed industry standard libraries from boost.org

[tulpinspiration-blog-blog]

A little more Mapnik work for the week: Aaron Huslage and Roger Weeks of Tethr asked about a map stylesheet for OSM data that could generate maximally-compressed tiles to fit onto a portable GIS / disaster response system they’re prototyping.

OSM Solar is a response to that requirement, and generates tiles that in many cases are 30%-40% the size of their OSM Mapnik counterparts. The job is mostly accomplished through drastic color reduction to a 4-bit (16 color) palette and aggressive pruning of details: parks are named but not filled, buildings are just barely visible for minimal context, color transitions and road casings are avoided.

[goldalworming-blog]

draw map with mapnik

Drawing map is so lovely if we do in python.

This is the mapnik xml that I generated from QuantumGIS

<?xml version="1.0" ?> <Map bgcolor="rgb(255,255,255)" srs="+proj=utm +zone=48 +south +ellps=WGS84 +datum=WGS84 +units=m +no_defs">     <Style name="Bangunan_style">         <Rule>             <PolygonSymbolizer>                 <CssParameter name="fill">rgb(144,52,45)</CssParameter>                 <CssParameter name="gamma">0.7</CssParameter>             </PolygonSymbolizer>             <LineSymbolizer>                 <CssParameter name="stroke-width">0.96</CssParameter>             </LineSymbolizer>         </Rule>     </Style>     <Style name="Jalan_style">         <Rule>             <LineSymbolizer>                 <CssParameter name="stroke">rgb(255,0,0)</CssParameter>                 <CssParameter name="stroke-width">0.96</CssParameter>                 <CssParameter name="stroke-linejoin">bevel</CssParameter>                 <CssParameter name="stroke-linecap">square</CssParameter>             </LineSymbolizer>         </Rule>     </Style>     <Style name="Sungai_style">         <Rule>             <LineSymbolizer>                 <CssParameter name="stroke">rgb(70,130,180)</CssParameter>                 <CssParameter name="stroke-width">0.96</CssParameter>                 <CssParameter name="stroke-linejoin">bevel</CssParameter>                 <CssParameter name="stroke-linecap">square</CssParameter>             </LineSymbolizer>         </Rule>     </Style>     <Style name="kelurahan_style">         <Rule>             <PolygonSymbolizer>                 <CssParameter name="fill">rgb(157,245,92)</CssParameter>                 <CssParameter name="gamma">0.7</CssParameter>             </PolygonSymbolizer>             <LineSymbolizer>                 <CssParameter name="stroke-width">0.96</CssParameter>             </LineSymbolizer>         </Rule>     </Style>     <Layer name="kelurahan" srs="+proj=utm +zone=48 +south +ellps=WGS84 +datum=WGS84 +units=m +no_defs">         <StyleName>kelurahan_style</StyleName>         <Datasource>             <Parameter name="file">bdg_barat/kelurahan.TAB</Parameter>             <Parameter name="layer">kelurahan</Parameter>             <Parameter name="multiple_geometries">0</Parameter>             <Parameter name="type">ogr</Parameter>         </Datasource>     </Layer>     <Layer name="Sungai" srs="+proj=utm +zone=48 +south +ellps=WGS84 +datum=WGS84 +units=m +no_defs">         <StyleName>Sungai_style</StyleName>         <Datasource>             <Parameter name="file">bdg_barat/Sungai.TAB</Parameter>             <Parameter name="layer">Sungai</Parameter>             <Parameter name="multiple_geometries">0</Parameter>             <Parameter name="type">ogr</Parameter>         </Datasource>     </Layer>     <Layer name="Jalan" srs="+proj=utm +zone=48 +south +ellps=WGS84 +datum=WGS84 +units=m +no_defs">         <StyleName>Jalan_style</StyleName>         <Datasource>             <Parameter name="file">bdg_barat/Jalan.TAB</Parameter>             <Parameter name="layer">Jalan</Parameter>             <Parameter name="multiple_geometries">0</Parameter>             <Parameter name="type">ogr</Parameter>         </Datasource>     </Layer>     <Layer name="Bangunan" srs="+proj=utm +zone=48 +south +ellps=WGS84 +datum=WGS84 +units=m +no_defs">         <StyleName>Bangunan_style</StyleName>         <Datasource>             <Parameter name="file">bdg_barat/Bangunan.TAB</Parameter>             <Parameter name="layer">Bangunan</Parameter>             <Parameter name="multiple_geometries">0</Parameter>             <Parameter name="type">ogr</Parameter>         </Datasource>     </Layer> </Map>

the hardest thing to get the map is find the right coordinate so it could rendered properly so it's better if we generated it from the background layer coordinate. I change

map.zoom_to_box(mapnik.Envelope(778614, 9240464, 790014, 9230968))

to

map.zoom_to_box(layer0.envelope())

now we can get the map automatically without confused with the number

import mapnik map = mapnik.Map(800, 400) mapnik.load_map(map, "bandungbarat.xml") layer0 = map.layers[0] map.zoom_to_box(layer0.envelope())

mapnik.render_to_file(map, "bandungbarat.png")

and this is the result.