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Updated Tutorial 2 -- 'Hello world' using an XML stylesheet (markdown)

springmeyer 2012-01-09 09:57:49 -08:00
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GettingStartedInXML.md

@ -10,9 +10,7 @@ Make sure you have mapnik (and the python bindings) installed and you've success
This tutorial covers using an XML stylesheet to rendering output that exactly matches the map output from the pure python example in [Getting Started Python Tutorial](GettingStartedInPython). This tutorial covers using an XML stylesheet to rendering output that exactly matches the map output from the pure python example in [Getting Started Python Tutorial](GettingStartedInPython).
## Step 1 ## Step 1: rendering script
### Hello World XML
First you will need a python script that sets the basic map parameters and points to the XML stylesheet. Copy the code below and save to a file called `world_map.py`. First you will need a python script that sets the basic map parameters and points to the XML stylesheet. Copy the code below and save to a file called `world_map.py`.
@ -28,6 +26,8 @@ mapnik.render_to_file(m, image)
print "rendered image to '%s'" % image print "rendered image to '%s'" % image
``` ```
## Step 2: data
Now, we need some data to render, let's use a shapefile of world border polygons from http://naturalearthdata.com. Download the data from this wiki's local cache [here](data/110m-admin-0-countries.zip) or directly from the [Natural Earth Data site](http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/110m/cultural/110m-admin-0-countries.zip). Unzip the archive in the same directory as the `world_map.py`. Once unzipped, you should see four files like: Now, we need some data to render, let's use a shapefile of world border polygons from http://naturalearthdata.com. Download the data from this wiki's local cache [here](data/110m-admin-0-countries.zip) or directly from the [Natural Earth Data site](http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/110m/cultural/110m-admin-0-countries.zip). Unzip the archive in the same directory as the `world_map.py`. Once unzipped, you should see four files like:
ne_110m_admin_0_countries.shp ne_110m_admin_0_countries.shp
@ -40,7 +40,9 @@ To download and unzip on the command line with the do:
wget https://github.com/mapnik/mapnik/wiki/data/110m-admin-0-countries.zip wget https://github.com/mapnik/mapnik/wiki/data/110m-admin-0-countries.zip
unzip 110m-admin-0-countries.zip # creates ne_110m_admin_0_countries.shp unzip 110m-admin-0-countries.zip # creates ne_110m_admin_0_countries.shp
Next, create the `world_style.xml` file referenced in the `world_map.py` script. Copy this XML and save to a file called `world_style.xml`, also in the same directory as `world_map.py` script. ## Step 3: style
Finally, create the `world_style.xml` file referenced in the `world_map.py` script. Copy this XML and save to a file called `world_style.xml`, also in the same directory as `world_map.py` script.
```xml ```xml
<Map background-color="steelblue" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"> <Map background-color="steelblue" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs">
@ -63,6 +65,8 @@ Next, create the `world_style.xml` file referenced in the `world_map.py` script.
</Map> </Map>
``` ```
## Step 4: test
Now run the python script: Now run the python script:
python world_map.py python world_map.py