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		<title>bloco de notas</title>
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		<title>Manifiesto: En defensa de los derechos fundamentales en Internet</title>
		<link>http://eloiribeiro.wordpress.com/2009/12/03/manifiesto-en-defensa-de-los-derechos-fundamentales-en-internet/</link>
		<comments>http://eloiribeiro.wordpress.com/2009/12/03/manifiesto-en-defensa-de-los-derechos-fundamentales-en-internet/#comments</comments>
		<pubDate>Thu, 03 Dec 2009 11:30:25 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[espanha]]></category>
		<category><![CDATA[informatica]]></category>
		<category><![CDATA[politica]]></category>

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		<description><![CDATA[Ante la inclusión en el Anteproyecto de Ley de Economía sostenible de modificaciones legislativas que afectan al libre ejercicio de las libertades de expresión, información y el derecho de acceso a la cultura a través de Internet, los periodistas, bloggers, usuarios, profesionales y creadores de internet manifestamos nuestra firme oposición al proyecto, y declaramos que…
1.- [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=eloiribeiro.wordpress.com&blog=7354167&post=358&subd=eloiribeiro&ref=&feed=1" />]]></description>
			<content:encoded><![CDATA[<div class='snap_preview'><br /><p>Ante la inclusión en el Anteproyecto de Ley de Economía sostenible de modificaciones legislativas que afectan al libre ejercicio de las libertades de expresión, información y el derecho de acceso a la cultura a través de Internet, los periodistas, bloggers, usuarios, profesionales y creadores de internet manifestamos nuestra firme oposición al proyecto, y declaramos que…</p>
<p>1.- Los derechos de autor no pueden situarse por encima de los derechos fundamentales de los ciudadanos, como el derecho a la privacidad, a la seguridad, a la presunción de inocencia, a la tutela judicial efectiva y a la libertad de expresión.</p>
<p>2.- La suspensión de derechos fundamentales es y debe seguir siendo competencia exclusiva del poder judicial. Ni un cierre sin sentencia. Este anteproyecto, en contra de lo establecido en el artículo 20.5 de la Constitución, pone en manos de un órgano no judicial -un organismo dependiente del ministerio de Cultura-, la potestad de impedir a los ciudadanos españoles el acceso a cualquier página web.</p>
<p>3.- La nueva legislación creará inseguridad jurídica en todo el sector tecnológico español, perjudicando uno de los pocos campos de desarrollo y futuro de nuestra economía, entorpeciendo la creación de empresas, introduciendo trabas a la libre competencia y ralentizando su proyección internacional.</p>
<p>4.- La nueva legislación propuesta amenaza a los nuevos creadores y entorpece la creación cultural. Con Internet y los sucesivos avances tecnológicos se ha democratizado extraordinariamente la creación y emisión de contenidos de todo tipo, que ya no provienen prevalentemente de las industrias culturales tradicionales, sino de multitud de fuentes diferentes.</p>
<p>5.- Los autores, como todos los trabajadores, tienen derecho a vivir de su trabajo con nuevas ideas creativas, modelos de negocio y actividades asociadas a sus creaciones. Intentar sostener con cambios legislativos a una industria obsoleta que no sabe adaptarse a este nuevo entorno no es ni justo ni realista. Si su modelo de negocio se basaba en el control de las copias de las obras y en Internet no es posible sin vulnerar derechos fundamentales, deberían buscar otro modelo.</p>
<p>6.- Consideramos que las industrias culturales necesitan para sobrevivir alternativas modernas, eficaces, creíbles y asequibles y que se adecuen a los nuevos usos sociales, en lugar de limitaciones tan desproporcionadas como ineficaces para el fin que dicen perseguir.</p>
<p>7.- Internet debe funcionar de forma libre y sin interferencias políticas auspiciadas por sectores que pretenden perpetuar obsoletos modelos de negocio e imposibilitar que el saber humano siga siendo libre.</p>
<p>8.- Exigimos que el Gobierno garantice por ley la neutralidad de la Red en España, ante cualquier presión que pueda producirse, como marco para el desarrollo de una economía sostenible y realista de cara al futuro.</p>
<p>9.- Proponemos una verdadera reforma del derecho de propiedad intelectual orientada a su fin: devolver a la sociedad el conocimiento, promover el dominio público y limitar los abusos de las entidades gestoras.</p>
<p>10.- En democracia las leyes y sus modificaciones deben aprobarse tras el oportuno debate público y habiendo consultado previamente a todas las partes implicadas. No es de recibo que se realicen cambios legislativos que afectan a derechos fundamentales en una ley no orgánica y que versa sobre otra materia.</p>
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		<title>Juntar varios ficheiros</title>
		<link>http://eloiribeiro.wordpress.com/2009/11/27/juntar-varios-ficheiros/</link>
		<comments>http://eloiribeiro.wordpress.com/2009/11/27/juntar-varios-ficheiros/#comments</comments>
		<pubDate>Fri, 27 Nov 2009 09:31:13 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[linux]]></category>
		<category><![CDATA[ubuntu]]></category>

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		<description><![CDATA[
cat ficheiro1.txt ficheiro2.txt ficheiro3.txt &#62; tudo.txt

       <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=eloiribeiro.wordpress.com&blog=7354167&post=355&subd=eloiribeiro&ref=&feed=1" />]]></description>
			<content:encoded><![CDATA[<div class='snap_preview'><br /><pre class="brush: bash;">
cat ficheiro1.txt ficheiro2.txt ficheiro3.txt &gt; tudo.txt
</pre>
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		<title>Valência em 3D</title>
		<link>http://eloiribeiro.wordpress.com/2009/11/18/valencia-em-3d/</link>
		<comments>http://eloiribeiro.wordpress.com/2009/11/18/valencia-em-3d/#comments</comments>
		<pubDate>Wed, 18 Nov 2009 08:27:29 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[google earth]]></category>
		<category><![CDATA[viajar]]></category>

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		<description><![CDATA[Desde o passado dia 13 é possível ver a cidade de Valência, onde vivo, em 3D no Google Earth. Para isso, confirmar que o tema/capa &#8220;Edificios 3D&#8221; está activado (lado inferior esquerdo). Isto não descarta uma visita à cidade! Fonte.

       <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=eloiribeiro.wordpress.com&blog=7354167&post=347&subd=eloiribeiro&ref=&feed=1" />]]></description>
			<content:encoded><![CDATA[<div class='snap_preview'><br /><p>Desde o passado dia 13 é possível ver a cidade de Valência, onde vivo, em 3D no <a href="http://earth.google.com/intl/pt-PT/">Google Earth</a>. Para isso, confirmar que o tema/capa &#8220;Edificios 3D&#8221; está activado (lado inferior esquerdo). Isto não descarta uma visita à cidade! <a href="http://google-latlong.blogspot.com/2009/11/explore-valencia-in-3d.html">Fonte</a>.<br />
<span style="text-align:center; display: block;"><a href="http://eloiribeiro.wordpress.com/2009/11/18/valencia-em-3d/"><img src="http://img.youtube.com/vi/EBgmjmQjp1k/2.jpg" alt="" /></a></span></p>
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			<media:title type="html">Eloi</media:title>
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		<title>This is the Internet by the IT crowd</title>
		<link>http://eloiribeiro.wordpress.com/2009/10/18/this-is-the-internet-by-the-it-crowd/</link>
		<comments>http://eloiribeiro.wordpress.com/2009/10/18/this-is-the-internet-by-the-it-crowd/#comments</comments>
		<pubDate>Sun, 18 Oct 2009 14:45:36 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[humor]]></category>
		<category><![CDATA[informatica]]></category>
		<category><![CDATA[video]]></category>

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		<description><![CDATA[
The IT crowd é uma serie hilariante sobre um departamento de informática composto por dois geeks (Roy e Moss) e a chefe (Jen) que de informática nada sabe. No total são 18 episódios de 25 minutos de duração. Nesta passagem Roy e Moss tentam sabotar o discurso de empregado do mês de Jen, convencendo-a que [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=eloiribeiro.wordpress.com&blog=7354167&post=338&subd=eloiribeiro&ref=&feed=1" />]]></description>
			<content:encoded><![CDATA[<div class='snap_preview'><br /><p><span style="text-align:center; display: block;"><a href="http://eloiribeiro.wordpress.com/2009/10/18/this-is-the-internet-by-the-it-crowd/"><img src="http://img.youtube.com/vi/iRmxXp62O8g/2.jpg" alt="" /></a></span></p>
<p><a href="http://pt.wikipedia.org/wiki/The_IT_Crowd">The IT crowd</a> é uma serie hilariante sobre um departamento de informática composto por dois <em>geeks</em> (Roy e Moss) e a chefe (Jen) que de informática nada sabe. No total são 18 episódios de 25 minutos de duração. Nesta passagem Roy e Moss tentam sabotar o discurso de empregado do mês de Jen, convencendo-a que a Internet se encontra dentro de essa caixa negra.</p>
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			<media:title type="html">Eloi</media:title>
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		<title>De ferias por Estónia, Letónia e Lituânia</title>
		<link>http://eloiribeiro.wordpress.com/2009/08/31/de-ferias-por-estonia-letonia-e-lituania/</link>
		<comments>http://eloiribeiro.wordpress.com/2009/08/31/de-ferias-por-estonia-letonia-e-lituania/#comments</comments>
		<pubDate>Mon, 31 Aug 2009 08:19:50 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[fotos]]></category>
		<category><![CDATA[viajar]]></category>

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		<description><![CDATA[View Larger Map
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			<content:encoded><![CDATA[<div class='snap_preview'><br /><p><iframe width="600" height="600" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="http://maps.google.com/maps/ms?ie=UTF8&amp;hl=pt-PT&amp;msa=0&amp;msid=105283411304016465739.000471ce521b2009926fc&amp;ll=57.0,24.0&amp;spn=4.654139,2.189349&amp;output=embed"></iframe><br /><small><a href="http://maps.google.com/maps/ms?ie=UTF8&amp;hl=pt-PT&amp;msa=0&amp;msid=105283411304016465739.000471ce521b2009926fc&amp;ll=57.0,24.0&amp;spn=4.654139,2.189349&amp;source=embed" style="color:#0000FF;text-align:left">View Larger Map</a></small></p>
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		<title>Coverter imagens 0º 360º a -180 180º com GDAL</title>
		<link>http://eloiribeiro.wordpress.com/2009/07/08/coverter-imagens-0%c2%ba-360%c2%ba-a-180-180%c2%ba-com-gdal/</link>
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		<pubDate>Wed, 08 Jul 2009 11:52:51 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[gdal]]></category>
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		<description><![CDATA[Um dia de estes estava a procurar dados para um trabalho que temos entre-mãos e deparei-me com umas imagens, as que necessitava, com os dados de 0º a 360º.  Assim à primeira parece que está tudo bem e com lógica, o problema está em que por aqui gostamos de pôr a Europa no centro [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=eloiribeiro.wordpress.com&blog=7354167&post=262&subd=eloiribeiro&ref=&feed=1" />]]></description>
			<content:encoded><![CDATA[<div class='snap_preview'><br /><p>Um dia de estes estava a procurar dados para um trabalho que temos entre-mãos e deparei-me com umas imagens, as que necessitava, com os dados de 0º a 360º.  Assim à primeira parece que está tudo bem e com lógica, o problema está em que por aqui gostamos de pôr a Europa no centro do mapa com os dados de -180º a 180º. Então seria necessário cortar a imagem pelo meio e a segunda metade mover-la para o lado esquerdo da primeira metade e voltar a juntar as duas partes. Parecia complicado, mas depois de googlear um pouco dei com a solução e deixo-vos aqui por se alguma vez vos passa o mesmo.</p>
<p style="text-align:center;"><a><img src="http://lh3.ggpht.com/_B9uNfpvjwAI/SjxCi7frUTI/AAAAAAAAGOA/YQxai-KXjL4/s400/Screenshot1b.png" /></a></p>
<p>Supondo que <a href="www.gdal.org/">GDAL</a>  está instalado vamos usar <em><a href="http://www.gdal.org/gdalinfo.html">gdalinfo</a></em> para conhecer o numero de colunas que a imagem tem.</p>
<pre class="brush: bash;">
gdalinfo imagem.tif
(...)
Size is 144, 73
(...)
</pre>
<p>Agora já sabemos que a imagem tem 144 colunas por 73 filas.   Com <em><a href="http://www.gdal.org/gdal_translate.html">gdal_translate</a></em>  cortamos e georeferênciamos a parte direita (este) e repetimos o processo para a parte esquerda (oeste) da imagem.  Com o parâmetro <em>-srcwin</em> indicamos por onde cortamos imagem (coluna 72=144/2) e com o parâmetro  <em>-a_ullr</em> a posição que queremos. No final juntamos as duas imagens com <em><a href="http://www.gdal.org/gdal_merge.html">gdal_merge.py</a></em>.</p>
<pre class="brush: bash;">
gdal_translate -srcwin 0 0 72 73 -a_ullr 0 90 180 -90 imagem.tif imagem_este.tif
gdal_translate -srcwin 72 0 72 73 -a_ullr -180 90 0 -90 imagem.tif imagem_oeste.tif
gdal_merge.py -o imagem_corrigida.tif imagem_oeste.tif imagem_este.tif
</pre>
<p>Este é o resultado.</p>
<p style="text-align:center;"><a><img src="http://lh5.ggpht.com/_B9uNfpvjwAI/SjwlXbtjJiI/AAAAAAAAGN4/MToJsJceHks/s400/Screenshot2b.png" /></a></p>
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		<title>Aprende Socrates</title>
		<link>http://eloiribeiro.wordpress.com/2009/06/29/aprende-socrates/</link>
		<comments>http://eloiribeiro.wordpress.com/2009/06/29/aprende-socrates/#comments</comments>
		<pubDate>Mon, 29 Jun 2009 18:41:16 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[informatica]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[politica]]></category>
		<category><![CDATA[software livre]]></category>
		<category><![CDATA[video]]></category>

		<guid isPermaLink="false">http://eloiribeiro.wordpress.com/?p=257</guid>
		<description><![CDATA[
       <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=eloiribeiro.wordpress.com&blog=7354167&post=257&subd=eloiribeiro&ref=&feed=1" />]]></description>
			<content:encoded><![CDATA[<div class='snap_preview'><br /><p><span style="text-align:center; display: block;"><a href="http://eloiribeiro.wordpress.com/2009/06/29/aprende-socrates/"><img src="http://img.youtube.com/vi/lFRNKytkyCs/2.jpg" alt="" /></a></span></p>
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		<title>Ubuntugis-unstable</title>
		<link>http://eloiribeiro.wordpress.com/2009/06/29/ubuntugis-unstable/</link>
		<comments>http://eloiribeiro.wordpress.com/2009/06/29/ubuntugis-unstable/#comments</comments>
		<pubDate>Mon, 29 Jun 2009 17:43:39 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[sig]]></category>
		<category><![CDATA[software livre]]></category>
		<category><![CDATA[ubuntu]]></category>

		<guid isPermaLink="false">http://eloiribeiro.wordpress.com/?p=245</guid>
		<description><![CDATA[Se és um desses temerários que gosta de ter sempre o último do software desapreciando a estabilidade. Pois então, recomendo adicionar ás tuas fontes de aplicações o repositório de Ubuntugis-unstable.
sources.list:
deb http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu jaunty main
deb-src http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu jaunty main
e a chave aqui.
Bem, não me considero nem temerário, nem desapreço pela estabilidade do software, prova disso é tentar usar [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=eloiribeiro.wordpress.com&blog=7354167&post=245&subd=eloiribeiro&ref=&feed=1" />]]></description>
			<content:encoded><![CDATA[<div class='snap_preview'><br /><p>Se és um desses temerários que gosta de ter sempre o último do <em>software</em> desapreciando a estabilidade. Pois então, recomendo adicionar ás tuas fontes de aplicações o repositório de <a href="https://launchpad.net/~ubuntugis/+archive/ubuntugis-unstable">Ubuntugis-unstable</a>.</p>
<p>sources.list:</p>
<p>deb http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu jaunty main</p>
<p>deb-src http://ppa.launchpad.net/ubuntugis/ubuntugis-unstable/ubuntu jaunty main</p>
<p>e a chave <a href="http://keyserver.ubuntu.com:11371/pks/lookup?op=get&amp;search=0x089EBE08314DF160">aqui</a>.</p>
<p>Bem, não me considero nem temerário, nem desapreço pela estabilidade do <em>software</em>, prova disso é tentar usar sempre que possível apenas software livre <img src='http://s.wordpress.com/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> . Obviamente era um exagero. No meu caso adicionei estes repositórios pela necessidade de converter dados no formato <a href="http://en.wikipedia.org/wiki/GRIB">GRIB</a> a <a href="http://pt.wikipedia.org/wiki/GeoTIFF">GeoTiff</a> com a nova versão de <a href="http://www.gdal.org/">GDAL</a> (v1.6), e por agora não registei nenhum sintoma de instabilidade.</p>
<p>Além da nova versão de <a href="http://www.gdal.org/">GDAL</a>, vem com <a href="http://grass.itc.it/">GRASS</a> 6.4, <a href="http://www.qgis.org/">QGIS</a> 1.1 e <a href="https://launchpad.net/~ubuntugis/+archive/ubuntugis-unstable">mais</a>&#8230;</p>
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		<title>Análise espacial com PostGIS IV</title>
		<link>http://eloiribeiro.wordpress.com/2009/06/23/analise-espacial-com-postgis-iv/</link>
		<comments>http://eloiribeiro.wordpress.com/2009/06/23/analise-espacial-com-postgis-iv/#comments</comments>
		<pubDate>Tue, 23 Jun 2009 17:02:59 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[postgis]]></category>
		<category><![CDATA[postgresql]]></category>
		<category><![CDATA[sig]]></category>

		<guid isPermaLink="false">http://eloiribeiro.wordpress.com/?p=234</guid>
		<description><![CDATA[Por vezes temos tabelas com informação passível de ser georeferenciada, inclusivo com campos com as coordenadas, mas que carecem de geometria. Para criar um tema de pontos a partir das coordenadas da tabela (event layer) usamos a função MakePoint(x, y) de PostGIS. Da seguinte maneira.

-- apenas no caso da tabela ainda não possuir um campo [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=eloiribeiro.wordpress.com&blog=7354167&post=234&subd=eloiribeiro&ref=&feed=1" />]]></description>
			<content:encoded><![CDATA[<div class='snap_preview'><br /><p>Por vezes temos tabelas com informação passível de ser georeferenciada, inclusivo com campos com as coordenadas, mas que carecem de geometria. Para criar um tema de pontos a partir das coordenadas da tabela (<em>event layer</em>) usamos a função MakePoint(x, y) de PostGIS. Da seguinte maneira.</p>
<pre class="brush: sql;">
-- apenas no caso da tabela ainda não possuir um campo com chave primaria
ALTER TABLE nome_da_tabela ADD COLUMN gid serial primary key;

-- adicionamos o tema à tabela geometry_columns
-- 23030 é o codigo EPSG correspondente ao sistema de coordenadas  ED50 30N
SELECT AddGeometryColumn( '', 'nome_da_tabela', 'geom', 23030, 'POINT', 2);

-- criamos a geometria no campo geom da tabela
UPDATE nome_da_tabela SET geom = setsrid(MakePoint(x, y), 23030);
</pre>
<p>Agora já podemos usar a tabela inicial como um tema numa aplicação SIG como <a href="http://www.gvsig.gva.es">gvSIG</a> ou <a href="http://www.qgis.org">QGIS</a>.</p>
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		<title>Dias Julianos com Python</title>
		<link>http://eloiribeiro.wordpress.com/2009/06/18/dias-julianos-com-python/</link>
		<comments>http://eloiribeiro.wordpress.com/2009/06/18/dias-julianos-com-python/#comments</comments>
		<pubDate>Thu, 18 Jun 2009 10:45:06 +0000</pubDate>
		<dc:creator>Eloi</dc:creator>
				<category><![CDATA[python]]></category>

		<guid isPermaLink="false">http://eloiribeiro.wordpress.com/?p=212</guid>
		<description><![CDATA[Algumas vezes necessitamos trabalhar com a dias julianos em vez de datas do calendário gregoriano. Aqui deixo como o calcular com python.

import time
print time.strftime(&#34;%j&#34;)

Devolve quantos dias passaram desde o inicio do ano, hoje, 2009-06-18: 169 dias.
Ou assim:

import time
import datetime
data= datetime.date(2009, 06, 18)
print data.strftime(&#34;%j&#34;)

       <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=eloiribeiro.wordpress.com&blog=7354167&post=212&subd=eloiribeiro&ref=&feed=1" />]]></description>
			<content:encoded><![CDATA[<div class='snap_preview'><br /><p>Algumas vezes necessitamos trabalhar com a <a href="http://pt.wikipedia.org/wiki/Calend%C3%A1rio_juliano">dias julianos</a> em vez de datas do <a href="http://pt.wikipedia.org/wiki/Calend%C3%A1rio_gregoriano">calendário gregoriano</a>. Aqui deixo como o calcular com python.</p>
<pre class="brush: python;">
import time
print time.strftime(&quot;%j&quot;)
</pre>
<p>Devolve quantos dias passaram desde o inicio do ano, hoje, 2009-06-18: 169 dias.</p>
<p>Ou assim:</p>
<pre class="brush: python;">
import time
import datetime
data= datetime.date(2009, 06, 18)
print data.strftime(&quot;%j&quot;)
</pre>
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