Hi Guys,
After finally getting he postgis plugin compiled, I'm now stuck at
displaying the data.
I am using the osm.xml file as a reference.
In osm.xml:
<Layer name="tunnels" status="on" srs="+proj=merc +a=6378137 +b=6378137
+lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m [EMAIL PROTECTED]
+no_defs +over">
<Datasource>
... DB login credentials ...
<Parameter name="estimate_extent">false</Parameter>
<Parameter name="table">(select * from planet_osm_line where waterway
IS NOT NULL or landuse='reservoir' or landuse='water' or "natural"='lake'
or "natural"='water' order by z_order) as water</Parameter>
<Parameter
name="extent">-20037508,-19929239,20037508,19929239</Parameter>
</Datasource>
</Layer>
In my xml:
<Layer name="Roads" status="on" srs="+proj=longlat">
<StyleName>roads</StyleName>
<Datasource>
... db login credentials ..
<Parameter name="table">
(SELECT name, type,geometry FROM features WHERE features.type =
"road") as roads
</Parameter>
<Parameter name="estimate_extent">true</Parameter>
</Datasource>
</Layer>
There are two things I'm not totally clear on.
1) What field does Mapnik use for geometry?
My geometry field is Postgis' standard geometry type. It may be point, line
or polygon depending on feature type.
2) I've set the SRID to 4326 (WGS84) in the DB. How do I know what SRS to
use?
When I view it in Mapnik Viewer, it doesn't show the layer and there are no
error messages.
Thanks for helping.
Xin
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