Artem, thanks for your reply, but I am beginner in Mapnik. Please
explain it in detail
I have configured as following:
installed proj4 as written in manual and setup following commands in Python
>>>from mapnik import Projection
>>>Projection('+init=epsg:900913')
Added this link ... into c:\prog\nad\epsg
«900913» +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 +nadgri...@null +wktext +no_defs «»
Anyway the map rendering is not correct as it must be.
#### wms.py ####
import sys
from mapnik.ogcserver.wsgi import WSGIApp
sys.path.append('c:/ms4w/Apache/htdocs/wms/')
application = WSGIApp('c:/ms4w/Apache/htdocs/wms/ogcserver.conf')
if __name__ == '__main__':
from wsgiref.simple_server import make_server
httpd = make_server('localhost', 8000, application)
print "Listening on port 8000...."
httpd.serve_forever()
#### ogcserver.conf ####
[server]
module= xml_factory
debug=1
[service]
title=MapnikOGC
abstract=The Mapnik OGC Server Sample Configuration
maxheight=2048
maxwidth=2048
# 3031 is an antarctica polar projection
allowedepsgcodes=3031,4326,3395,900913
onlineresource=http://localhost/
fees=
keywordlist=mapnik
accessconstraints=
[contact]
contactperson=
contactorganization=
contactposition=
addresstype=
address=
city=
stateorprovince=
postcode=
country=
contactvoicetelephone=
contactelectronicmailaddress=
#### xml_factory.py ####
from mapnik.ogcserver.WMS import BaseWMSFactory
from mapnik import *
class WMSFactory(BaseWMSFactory):
def __init__(self):
BaseWMSFactory.__init__(self)
self.loadXML('c:/ms4w/Apache/htdocs/wms/population.xml')
self.finalize()
#### index.php ####
<script src="http://localhost/OpenLayers/lib/OpenLayers.js";></script>
<script type="text/javascript">
var map;
function init() {
var options = {
maxResolution: 156543.0339,
units: 'm',
projection: new OpenLayers.Projection("EPSG:900913"),
maxExtent: new OpenLayers.Bounds(-20037508.34,
-20037508.34, 20037508.34, 20037508.34)
};
map = new OpenLayers.Map("map", options);
wms = new OpenLayers.Layer.WMS("Mapnik
WMS","http://localhost:8000?";,
{
layers: '__all__',
format:'image/png',
bgcolor:'0x90B4D5',
//transparent:'TRUE'
},
{
gutter:1,
buffer:0,
ratio:1,
wrapDateLine: true,
isBaselayer:true,
singleTile:true,
transitionEffect:'resize'
}
);
map.addLayers([wms]);
map.fractionalZoom = true;
map.addLayers([wms]);
map.addControl(new OpenLayers.Control.Scale('scale'));
map.addControl(new OpenLayers.Control.Permalink('permalink'));
map.addControl(new OpenLayers.Control.MousePosition());
map.addControl(new OpenLayers.Control.Navigation());
map.addControl(new OpenLayers.Control.PanZoom());
var ls = new OpenLayers.Control.LayerSwitcher()
map.addControl(ls);
ls.maximizeControl();
map.zoomToMaxExtent();
}
</script>
#### population.xml ####
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE Map>
<!-- Sample Mapnik XML template by Dane Springmeyer -->
<Map srs="+proj=latlong +datum=WGS84">
<Style name="population">
<Rule>
<!-- Built from Seven Class sequential YIGnBu from www.colorbrewer.org -->
<!-- Quantile breaks originally from QGIS layer classification -->
<Filter>[POP2005] = 0 </Filter>
<PolygonSymbolizer>
<CssParameter name="fill">#ffffcc</CssParameter>
</PolygonSymbolizer>
<!-- Outlines for Antarctica look good -->
<LineSymbolizer>
<CssParameter name="stroke">black</CssParameter>
<CssParameter name="stroke-width">.1</CssParameter>
</LineSymbolizer>
</Rule>
<Rule>
<Filter>[POP2005] > 0 and [POP2005] < 15000</Filter>
<PolygonSymbolizer>
<CssParameter name="fill">#c7e9b4</CssParameter>
</PolygonSymbolizer>
<!-- Outlines for Antarctica look good -->
<LineSymbolizer>
<CssParameter name="stroke">black</CssParameter>
<CssParameter name="stroke-width">.1</CssParameter>
</LineSymbolizer>
</Rule>
<Rule>
<Filter>[POP2005] >= 15000 and [POP2005] < 255000</Filter>
<PolygonSymbolizer>
<CssParameter name="fill">#7fcdbb</CssParameter>
</PolygonSymbolizer>
</Rule>
<Rule>
<Filter>[POP2005] >= 255000 and [POP2005] < 1300000</Filter>
<PolygonSymbolizer>
<CssParameter name="fill">#1d91c0</CssParameter>
</PolygonSymbolizer>
</Rule>
<Rule>
<Filter>[POP2005] >= 1300000 and [POP2005] < 4320000</Filter>
<PolygonSymbolizer>
<CssParameter name="fill">#41b6c3</CssParameter>
</PolygonSymbolizer>
</Rule>
<Rule>
<Filter>[POP2005] >= 4320000 and [POP2005] < 9450000</Filter>
<PolygonSymbolizer>
<CssParameter name="fill">#225ea8</CssParameter>
</PolygonSymbolizer>
</Rule>
<Rule>
<Filter>[POP2005] >= 9450000 and [POP2005] < 25650000</Filter>
<PolygonSymbolizer>
<CssParameter name="fill">#225ea8</CssParameter>
</PolygonSymbolizer>
</Rule>
<Rule>
<Filter>[POP2005] >= 25650000 and [POP2005] < 1134000000</Filter>
<PolygonSymbolizer>
<CssParameter name="fill">#122F7F</CssParameter>
</PolygonSymbolizer>
</Rule>
<Rule>
<ElseFilter/> <!-- This will catch all other values - in this
case just India and China -->
<!-- A dark red polygon fill and black outline is used here to
highlight these two countries -->
<PolygonSymbolizer>
<CssParameter name="fill">darkred</CssParameter>
</PolygonSymbolizer>
<LineSymbolizer>
<CssParameter name="stroke">black</CssParameter>
<CssParameter name="stroke-width">.7</CssParameter>
</LineSymbolizer>
</Rule>
</Style>
<Style name="countries_label">
<Rule>
<!-- Only label those countries with over 9 Million People -->
<!-- Note: Halo and Fill are reversed to try to make them subtle -->
<Filter>[POP2005] >= 4320000 and [POP2005] < 9450000</Filter>
<TextSymbolizer name="NAME" face_name="DejaVu Sans Bold"
size="7" fill="black" halo_fill= "#DFDBE3" halo_radius="1"
wrap_width="20" spacing="5" allow_overlap="false" avoid_edges="false"
min_distance="10"/>
</Rule>
<Rule>
<!-- Only label those countries with over 9 Million People -->
<!-- Note: Halo and Fill are reversed to try to make them subtle -->
<Filter>[POP2005] >= 9450000 and [POP2005] < 25650000</Filter>
<TextSymbolizer name="NAME" face_name="DejaVu Sans Book"
size="9" fill="black" halo_fill= "#DFDBE3" halo_radius="1"
wrap_width="20" spacing="5" allow_overlap="false" avoid_edges="false"
min_distance="10"/>
</Rule>
<Rule>
<!-- Those with over 25 Million get larger labels -->
<Filter>[POP2005] >= 25650000 and [POP2005] < 1134000000</Filter>
<TextSymbolizer name="NAME" face_name="DejaVu Sans Book"
size="12" fill="white" halo_fill= "#2E2F39" halo_radius="1"
wrap_width="20" spacing="5" allow_overlap="false" avoid_edges="true"
min_distance="10"/>
</Rule>
<Rule>
<!-- Those with over 25 Million get larger labels -->
<!-- Note: allow_overlap is true here to allow India to sneak through -->
<Filter>[POP2005] >= 1134000000</Filter>
<TextSymbolizer name="NAME" face_name="DejaVu Sans Book"
size="15" fill="white" halo_fill= "black" halo_radius="1"
wrap_width="20" spacing="5" allow_overlap="true" avoid_edges="true"
min_distance="10"/>
</Rule>
</Style>
<Layer name="countries" status="on" queryable="true">
<!-- Style order determines layering hierarchy -->
<!-- Labels go on top so they are listed second -->
<StyleName>population</StyleName>
<Datasource>
<Parameter name="type">shape</Parameter>
<Parameter
name="file">c:/ms4w/Apache/htdocs/wms/data/TM_WORLD_BORDERS_SIMPL-0.2</Parameter>
</Datasource>
</Layer>
<Layer name="countries_l" status="on" queryable="true">
<!-- Style order determines layering hierarchy -->
<!-- Labels go on top so they are listed second -->
<StyleName>countries_label</StyleName>
<Datasource>
<Parameter name="type">shape</Parameter>
<Parameter
name="file">c:/ms4w/Apache/htdocs/wms/data/TM_WORLD_BORDERS_SIMPL-0.2</Parameter>
</Datasource>
</Layer>
</Map>
On 1/28/10, Artem Pavlenko <[email protected]> wrote:
> Hi Ozodbek,
>
> You're projecting from Geographical (Lon/Lat) WGS84 coordinate system
> to spherical Mercator (spheroid not an ellipsoid) , right? In this
> process you're getting coordinates which are outside of the valid
> longitude range (-180,180). The workaround depends on your
> requirements. Try using Mercator with WGS84 ellipsoid, or pre-process
> your original dataset to use spheroid and clip all features to the
> extent which will keep proj4 happy e.g
>
> -180,-85,180,85
>
> We're aware of this issue and current behaviour is far from ideal.
> This is something we're hoping to address in upcoming releases.
>
> Regards,
> Artem
>
>
> 2010/1/28 Ozodbek Ulmasov <[email protected]>:
>> Map was shown incorrect when I opened it in browser.
>> To check it please visit this link http://max.uz/mapnik.gif
>> I also noticed disappearing of layers when zooming.
>> The same problem occures with other maps.
>> I really need your help, can you please suggest me how can I solve the
>> problems.
>>
>> Best regards
>> Ozodbek Ulmasov
>> _______________________________________________
>> Mapnik-users mailing list
>> [email protected]
>> https://lists.berlios.de/mailman/listinfo/mapnik-users
>>
>
--
------------------------------------------------------
Ozodbek Ulmasov
Manager
Newmax Technologies LLC
Uzbekistan, Tashkent
Parkentskaya str. 89b, 700007
Tel: (+99897) 3447775
(+99871) 1401515
Fax: (+99871) 1401515
E-mail: [email protected]
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