ogrinfo -summary -al countries_point_lonlat_sorted.shp
INFO: Open of `countries_point_lonlat_sorted.shp'
using driver `ESRI Shapefile' successful.
Layer name: countries_point_lonlat_sorted
Geometry: Point
Feature Count: 198
Extent: (-175.185000, -42.634000) - (179.219000, 64.764000)
Layer SRS WKT:
(unknown)
name: String (254.0)
iso2: String (254.0)
iso3: String (254.0)
un: Real (16.6)
fips: String (254.0)
lon: Real (16.6)
lat: Real (16.6)
area: Real (16.6)
pop2005: Real (16.6)
nor: String (254.0)
swe: String (254.0)
dan: String (254.0)
fin: String (254.0)
ice: String (254.0)
Bjørn
2010/1/16 Rahkonen Jukka <[email protected]>:
> Hi,
>
> Perhaps something odd with coordinates or extents. What does "ogrinfo
> -summary -al" report about the shapefiles?
>
> -Jukka Rahkonen-
>
> Bjørn Sandvik wrote:
>
>> Hi Warren and Artem
>
>> Thanks for your effort. Same result after adding "+over" to SRS. I'm
> using Mapnik 0.6.1 from the win32 binaries. I'll move to 0.7.0
> binaries when its released.
>
>> Thanks,
>> Bjørn
>
>
>> 2010/1/16 Warren Vick <[email protected]>:
>>> I'm using FME to reproject, but otherwise same set-up. Here's my 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 +nadgri...@null +no_defs +over
>>
>> I recall something important about the "+over" but confess I've forgotten
>> what it does. Perhaps worth a try!
>>
>> Regards,
>> Warren
>>
>> -----Original Message-----
>> From: Bjørn Sandvik [mailto:[email protected]]
>> Sent: 16 January 2010 12:18 PM
>> To: [email protected]; Warren Vick
>> Subject: Re: [Mapnik-users] Problem with spherical mercator at one zoom level
>>
>> Hi,
>>
>> I'm facing the same problem after converting the shapefile to
>> spherical mercator with ogr2ogr:
>> ogr2ogr -t_srs EPSG:900913 -s_srs EPSG:4326
>> countries_point_lonlat_sorted_merc.shp
>> countries_point_lonlat_sorted.shp
>>
>> Projection used in mapnik xml:
>> <Layer name="Country Labels" 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
>> +nadgri...@null">
>>
>> I've also tried different shapefiles. Same result. I'm using TileCache
>> to pre-generate the tiles.
>>
>> Bjørn
>>
>>
>> 2010/1/16 Warren Vick <[email protected]>:
>>> Hello Bjørn,
>>>
>>> I had similar issues when first working with Mapnik. The only solution I
>>> found was to convert all my data to spherical Mercator, rather than try to
>>> work with a mix. No problems since.
>>>
>>> Regards,
>>> Warren
>>>
>>> -----Original Message-----
>>> From: [email protected]
>>> [mailto:[email protected]] On Behalf Of Bjørn Sandvik
>>> Sent: 15 January 2010 9:42 PM
>>> To: [email protected]
>>> Subject: [Mapnik-users] Problem with spherical mercator at one zoom level
>>>
>>> Hi,
>>>
>>> I'm experiencing a strange error with Mapnik rendering labels from a point
>>> shapefile. For zoom level 1 only labels on the southern hemisphere (the two
>>> bottom tiles) are rendered - see the image attachment. The other zoom
>>> levels are rendered correctly. It works when using standard
>>> latitude/longitide projection (EPSG:4326), but not "spherical mercator".
>>>
>>> tilecache.cfg
>>>
>>> [country_labels2]
>>> type=Mapnik
>>> mapfile=C:\EarthAtlas\maps\merc_country_labels2.xml
>>> spherical_mercator=true
>>> metaTile=true
>>> metaBuffer=50
>>> metaSize=2,2
>>>
>>> merc_country_labels2.xml
>>>
>>> <?xml version="1.0" encoding="utf-8"?>
>>> <!DOCTYPE Map>
>>> <Map 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 +nadgri...@null">
>>> <Style name="country_labels">
>>> <Rule>
>>> <TextSymbolizer name="nor" face_name="DejaVu Sans Book" size="8"
>>> wrap_width="50" fill="black" halo_fill="white" halo_radius="1" dy="0"
>>> dx="0" vertical_alignment="middle" allow_overlap="false"/>
>>> </Rule>
>>> </Style>
>>> <Layer name="Cities" srs="+proj=latlong +datum=WGS84">
>>> <StyleName>country_labels</StyleName>
>>> <Datasource>
>>> <Parameter name="encoding">latin1</Parameter>
>>> <Parameter name="type">shape</Parameter>
>>> <Parameter
>>> name="file">originals/countries_point_lonlat_sorted/countries_point_lonlat_sorted</Parameter>
>>> </Datasource>
>>> </Layer>
>>> </Map>
>>>
>>> I've also tried to reproject the shapefile before rendering the tiles
>>> - but the error was still there.
>>>
>>> Anyone else who have experienced this problem?
>>>
>>> Cheers,
>>> Bjørn
>>>
>>> http://blog.thematicmapping.org
>>>
>>
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