Dane, thanks for feedback. After setting tilecache aside and going through
the getting started guide at
http://trac.mapnik.org/wiki/XMLGettingStartedstep by step, I was was
able to produce a great population map with colors,
text, etc. For my PC, I had to tweak the shapefile names from
"TM_WORLD_BORDERS_SIMPL_0.3" to "TM_WORLD_BORDERS_SIMPL-0_3" (note missing
'.', and "-" instead of "_") to make it work with the example XML, but it
works!
Back to my original issue, here's some troublesome sample XML (simplified,
and for all zoom levels I think but still having the same issue):
<Map bgcolor="#00264c" srs="+proj=latlong +datum=WGS84">
<Style name="point style 7">
<Rule>
<Filter>[zoom] >= 0</Filter>
<PointSymbolizer file="./images/sys10-3px.png" height="3"
type="png" width="3" />
</Rule>
</Style>
<Layer name="layer 8" srs="+proj=latlong +datum=WGS84" status="on">
<StyleName>point style 7</StyleName>
<Datasource>
<Parameter name="type">shape</Parameter>
<Parameter name="file">./solarSystemsLayer</Parameter>
</Datasource>
</Layer>
</Map>
As is, I get a blank blue image. If I remove the following line, I get my
dots on an image:
<Filter>[zoom] >= 0</Filter>
This is when viewing through tilecache. Is there an argument I can pass in a
python script to test out zoom levels? Does zoom level specific data need to
be in the shapefile itself (guessing no)? Am I using wrongly formatted code?
Chris
On Mon, Mar 22, 2010 at 7:15 PM, Dane Springmeyer <[email protected]>wrote:
> Chris. Thoughts below inline.
>
> --- \o/ ---
> Sent from my phone
>
>
> On Mar 22, 2010, at 7:08 AM, Christopher Stevens <[email protected]>
> wrote:
>
> Howdy,
>> I have mapnik set up in Windows XP, and have had great success creating
>> and delivering tiles using tilecache...until I add filters.
>>
>
> For what kind of datasource and what do your filters look like? It's
> always good to paste some XML so we can do something more than guess.
>
>
> Lines in my XML containing filters are ignored with no visible errors that
>> I see.
>>
>
> Just means they are not matching. Note that shapefile field names are case
> sensitive.
>
>
>
>> With the world population mapnik example, this is the same case. I see
>> all-red filled countries, with no labels.
>>
>
> Didn't you have this working at some point? Have you made any changes to
> it? Are you sure you are using the right shapefile? It is the one from
> thematiccmapping blog that actually has the right attributes to work with
> that demo.
>
>
> Initial searching suggests I may be missing some libraries (I don't have
>> libcurl installed yet for Python 2.5). Could I trouble someone to confirm
>> this, and could I be missing additional libraries/packages?
>>
>
> Highly unlikely you are missing anything. Just check you shapefile and xml
> syntax.
>
> Thanks much in advance.
>>
>> Chris
>> _______________________________________________
>> Mapnik-users mailing list
>> [email protected]
>> https://lists.berlios.de/mailman/listinfo/mapnik-users
>>
>
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