<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Pessoal podiam ajudar nas seguintes dúvidas sobre openlayers?<br>
<br>
<br>
Como fixar o zoom com base numa unica layer de modo a que não seja
possivel mover o mapa para além desse mesmo layer?Mesmo que exista
outros com áreas superiores.<br>
<br>
<br>
Adicionando layer como wms/png é possível depois editar (como
vectores) e adicionar eventos com base em mouse events?<br>
<br>
<br>
Devido a ter muitas camadas parte do layer switcher fica oculto como
posso resolver este problema sem ter de aumentar ao tamanho da
pagina?é possivel fixar-lo no canto superior esquerdo?(mais para
cima) e colocar o tamanho das letras mais pequeno?<br>
<br>
<br>
Como posso ajustar automaticamente o tamanho da janela do openlayers
ao tamanho da pagina?<br>
<br>
<br>
<br>
Obrigado<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 02-12-2011 17:21, Jorge de Jesus wrote:
<blockquote cite="mid:4ED90934.7040002@pml.ac.uk" type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Oi<br>
<br>
Normalmente uso o Google Earth, a unica chatice eh que tens de ter
o WMS com suporte para o sistema EPSG:900913 (Spherical Mercator),
ou entao tens de usar OpenLayer.Layer.TMS que funciona como uma
proxy para o WMS<br>
<br>
Se queres um exemplo ve este site:<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://rsg.pml.ac.uk/wps/example/index.html">http://rsg.pml.ac.uk/wps/example/index.html</a><br>
<br>
Da uma vista de olhos ao codigo que podes descarregar num
ficheiro comprimido<br>
<br>
Bom fim de semana, eu vou beber umas pints<br>
<br>
Jorge<br>
<br>
<br>
On 02/12/11 17:15, Pedro Costa wrote:
<blockquote cite="mid:4ED907AA.1070806@sapo.pt" type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Pois não tem muita lógica, estou só a testar a ver se aprendo
alguma coisa :-).<br>
<br>
Qual camada é que costumas usar como base layer? Tenho de
encontrar uma simples...<br>
<br>
Obrigado, vou seguir as dicas<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 02-12-2011 15:31, Jorge de Jesus wrote:
<blockquote cite="mid:4ED8EF56.6060009@pml.ac.uk" type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<br>
Oi<br>
<br>
Um conselho, tenta usar o pastbin (<a moz-do-not-send="true"
class="moz-txt-link-freetext" href="http://pastebin.com/">http://pastebin.com/</a>)
assim mandas so um link em vez de uma catrafada de javascript<br>
<br>
O que se passa em e' que ao selectionares a camada OSM ela
fica sobreposta a camada wms_ruas e deixas de ver, o que e'
logico :)<br>
<br>
Talvez a solucao seja adicional as propriedades da camada OSM
algum valor de transparencia ('opacity': 0.5)<br>
<br>
Mas uma pergunta, pelo que vejo tens uma baseLayer que bem de
um WMS + uma camada com Ruas, nao consiguo percebe a utilidade
da OSM.<br>
<br>
Nao basta usar a OSM como baseLayer + WMS_ruas ?<br>
<br>
Normalmente o uso mais comum do OpenLayers e' teres uma image
raster e depois em cima varias camadas vectoriais, ja que nas
camadas vectoriais e' mais facil de modificar as
transparencias de cada objecto<br>
<br>
Alguem tem mais ideas, sugestoes ?<br>
Jorge<br>
<br>
On 02/12/11 15:20, Pedro Costa wrote:
<blockquote cite="mid:4ED8ECB2.9070800@sapo.pt" type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Tentei assim:<br>
<br>
<br>
<?xml version="1.0" encoding="UTF-8"?><br>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"DTD/xhtml1-strict.dtd"><br>
<html xmlns=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://www.w3.org/1999/xhtml">"http://www.w3.org/1999/xhtml"</a>><br>
<head><br>
<title>O meu primeiro mapa</title><br>
<meta http-equiv="Content-Type"
content="text/html; charset=UTF-8" /><br>
<script src=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://openlayers.org/api/OpenLayers.js">"http://openlayers.org/api/OpenLayers.js"</a>></script><br>
<script type="text/javascript"><br>
var map;<br>
function init() {<br>
<br>
var bounds = new OpenLayers.Bounds(<br>
-15699, 188532, -13689, 190828);<br>
<br>
var options = {<br>
controls: [ new
OpenLayers.Control.Navigation(),<br>
new
OpenLayers.Control.PanZoom(),<br>
new
OpenLayers.Control.LayerSwitcher()],<br>
maxExtent: bounds,<br>
maxResolution: 9.61328125,<br>
projection: "EPSG:27492",<br>
units: 'm'<br>
<br>
};<br>
<br>
map = new OpenLayers.Map('map', options);<br>
var wms_ruas = new OpenLayers.Layer.WMS(<br>
"ruas",<br>
<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://localhost:8080/geoserver/wms">"http://localhost:8080/geoserver/wms"</a>,<br>
{'layers': 'Vizela:ruas', 'format':'image/png',<br>
'transparent':'true',strategies:[new
OpenLayers.Strategy.Fixed()]},<br>
{'opacity': 1.0, 'isBaseLayer': false,
'visibility': true}<br>
);<br>
<br>
<br>
<br>
var wms_base = new OpenLayers.Layer.WMS(<br>
"base",<br>
<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://localhost:8080/geoserver/wms">"http://localhost:8080/geoserver/wms"</a>,<br>
{'layers': 'Vizela:base', 'format':'image/png',<br>
'transparent':'true',strategies:[new
OpenLayers.Strategy.Fixed()]},<br>
{'opacity': 1.0, 'isBaseLayer': true,
'visibility': true}<br>
);<br>
<br>
var osm_layer = new OpenLayers.Layer.OSM(<br>
'OpenStreetMap Layer'<br>
);<br>
<br>
<br>
map.addLayers([wms_base,osm_layer,wms_ruas]);<br>
if(!map.getCenter()) {<br>
map.zoomToMaxExtent();<br>
}<br>
}<br>
</script><br>
</head><br>
<body onload='init();'><br>
<h1>Mapa mundo</h1><br>
<div id='map' style='width: 500px; height:
500px;'><br>
</div><br>
</body><br>
</html><br>
<br>
<br>
<br>
<br>
<br>
E funciona no entanto quando seleciono a camada OSM deixo de
conseguir ver as ruas...Existe alguma propriedade para mudar
isto?Tenho de colocar o layer osm transparente?<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 02-12-2011 14:33, Jorge de Jesus wrote:
<blockquote cite="mid:4ED8E1C6.2020103@pml.ac.uk"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Vou responder a este email e ao outro que mandaste<br>
<br>
Nunca trabalhei com OSM, acho que e' uma classe que e'
herdada de OpenLayers.Layer.XYZ portanto tera as mesmos
options.<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://wiki.openstreetmap.org/wiki/OpenLayers_Simple_Example">http://wiki.openstreetmap.org/wiki/OpenLayers_Simple_Example</a><br>
<br>
Podes meter a layer onde quiseres sem grandes problemas,
ate podes chegar a este ponto:<br>
<br>
map.addLayer(new OpenLayers.Layer.OSM());<br>
<br>
Eu nao sei o que estas a tentar fazer mas penso que queras
que OSM seja a baseLayer ? Talvez isto funcione ?<br>
<br>
map.addLayer(new
OpenLayers.Layer.OSM(options={'isBaseLayer':true}));<br>
<br>
Quanto ao erro:<br>
<br>
<br>
<div role="listitem" class="errorTitle focusRow subLogRow
"><span class="errorDuplication "></span><span
aria-expanded="false" class="errorMessage ">layer.div
is undefined</span></div>
<span class=" "></span>
<div role="listitem" class="errorSourceBox
errorSource-show focusRow subLogRow "><a
moz-do-not-send="true"
title="layer.div.className="olLayerDiv";layer.div.style.overflow="";this.setLayerZIndex(layer,this.layers.length);if(layer.isFixed){this.viewPortDiv.appendChild(layer.div);}else{this.layerContainerDiv.appendChild(layer.div);}"
class="errorSource a11yFocus ">layer.div.className="olLayerDiv";layer...ContainerDiv.appendChild(layer.div);}<br>
<br>
o problema esta aqui:<br>
<br>
map.<b>addLayer</b>([wms_ruas, wms_base]);<br>
<br>
addLayer --> Adiciona 1 layer e a funcao aceita um
Layer Object <br>
<br>
No teu caso estas a mandar uma lista de layers <br>
<br>
Tens de usar o metodo addLayers que aceita uma array
com layer<br>
<br>
</a><a moz-do-not-send="true"
title="layer.div.className="olLayerDiv";layer.div.style.overflow="";this.setLayerZIndex(layer,this.layers.length);if(layer.isFixed){this.viewPortDiv.appendChild(layer.div);}else{this.layerContainerDiv.appendChild(layer.div);}"
class="errorSource a11yFocus ">map.<b>addLayers</b>([wms_ruas,
wms_base]);</a><a moz-do-not-send="true"
title="layer.div.className="olLayerDiv";layer.div.style.overflow="";this.setLayerZIndex(layer,this.layers.length);if(layer.isFixed){this.viewPortDiv.appendChild(layer.div);}else{this.layerContainerDiv.appendChild(layer.div);}"
class="errorSource a11yFocus "><br>
</a></div>
<br>
Agora tudo ao molho (e fe' em Deus) !!!<br>
<br>
<a moz-do-not-send="true"
title="layer.div.className="olLayerDiv";layer.div.style.overflow="";this.setLayerZIndex(layer,this.layers.length);if(layer.isFixed){this.viewPortDiv.appendChild(layer.div);}else{this.layerContainerDiv.appendChild(layer.div);}"
class="errorSource a11yFocus ">map.<b>addLayers</b>([wms_ruas,
wms_base,new OpenLayers.Layer.OSM() ]);</a><br>
<br>
<br>
E tudo por agora mais duvida ?! ^_^ <br>
<br>
Eu normalmente estou no free.node.irc no canal #pywps<br>
<br>
Jorge<br>
<br>
<br>
On 02/12/11 12:51, Pedro Costa wrote:
<blockquote cite="mid:4ED8C9B7.6030302@sapo.pt"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Jorge ajuda-me também no seguinte sff, estou a tentar
agora adicionar um layer osm no código em baixo:<br>
<br>
<br>
<?xml version="1.0" encoding="UTF-8"?><br>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0
Strict//EN" "DTD/xhtml1-strict.dtd"><br>
<html xmlns=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://www.w3.org/1999/xhtml">"http://www.w3.org/1999/xhtml"</a>><br>
<head><br>
<title>O meu primeiro mapa</title><br>
<meta http-equiv="Content-Type"
content="text/html; charset=UTF-8" /><br>
<script src=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://openlayers.org/api/OpenLayers.js">"http://openlayers.org/api/OpenLayers.js"</a>></script><br>
<script type="text/javascript"><br>
var map;<br>
function init() {<br>
<br>
var bounds = new OpenLayers.Bounds(<br>
-15699, 188532, -13689, 190828);<br>
<br>
var options = {<br>
controls: [ new
OpenLayers.Control.Navigation(),<br>
new
OpenLayers.Control.PanZoom(),<br>
new
OpenLayers.Control.LayerSwitcher()],<br>
maxExtent: bounds,<br>
maxResolution: 9.61328125,<br>
projection: "EPSG:27492",<br>
units: 'm'<br>
<br>
};<br>
<br>
map = new OpenLayers.Map('map',
options);<br>
var wms_ruas = new OpenLayers.Layer.WMS(<br>
"ruas",<br>
<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://localhost:8080/geoserver/wms">"http://localhost:8080/geoserver/wms"</a>,<br>
{'layers': 'Vizela:ruas',
'format':'image/png',<br>
'transparent':'true',strategies:[new
OpenLayers.Strategy.Fixed()]},<br>
{'opacity': 1.0, 'isBaseLayer': true,
'visibility': true}<br>
);<br>
<br>
map.addLayer(wms_ruas);<br>
if(!map.getCenter()) {<br>
map.zoomToMaxExtent();<br>
}<br>
}<br>
</script><br>
</head><br>
<body onload='init();'><br>
<h1>Mapa mundo</h1><br>
<div id='map' style='width: 500px; height:
500px;'><br>
</div><br>
</body><br>
</html><br>
<br>
<br>
<br>
<br>
<br>
Mas sinceramente não sei bem onde o inserir, já tentei
em vários locais e não funciona.POdes ajudar?<br>
Estava a tentar adicionando o seguinte:<br>
<br>
<pre class="de1">var osm_layer = new OpenLayers.Layer.OSM(
'OpenStreetMap Layer'
);
Abraço
</pre>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 02-12-2011 12:37, Jorge de Jesus wrote:
<blockquote cite="mid:4ED8C67A.3020206@pml.ac.uk"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Ok parece que o assunto esta resolvido<br>
<br>
On 02/12/11 11:42, Pedro Costa wrote:
<blockquote cite="mid:4ED8B99C.8040707@sapo.pt"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Consegui resolver...Tinha de mudar postgis para o
nome da store que tinha e já funciona:-)<br>
<br>
Obrigado pessoal<br>
Vou continuar o estudo <br>
<br>
ABraço<br>
<br>
<br>
<br>
-------- Original Message --------
<table class="moz-email-headers-table" border="0"
cellpadding="0" cellspacing="0">
<tbody>
<tr>
<th align="RIGHT" nowrap="nowrap"
valign="BASELINE">Subject: </th>
<td>Re: [Portugal] duvidas sobre openlayers</td>
</tr>
<tr>
<th align="RIGHT" nowrap="nowrap"
valign="BASELINE">Date: </th>
<td>Fri, 02 Dec 2011 11:26:55 +0000</td>
</tr>
<tr>
<th align="RIGHT" nowrap="nowrap"
valign="BASELINE">From: </th>
<td>Pedro Costa <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:pedrocostaarma@sapo.pt"><pedrocostaarma@sapo.pt></a></td>
</tr>
<tr>
<th align="RIGHT" nowrap="nowrap"
valign="BASELINE">To: </th>
<td>Jorge de Jesus <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:jmdj@pml.ac.uk"><jmdj@pml.ac.uk></a></td>
</tr>
</tbody>
</table>
<br>
<br>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<br>
Obrigado Jorge. Já eliminei os erros no entanto o
openlayers não está a carregar o layer ruas, a
página abre mas sem eu conseguir ver o layer.<br>
<br>
Tentei wms_ruas.getExtent() no firebug e obtenho o
seguinte erro: <span role="presentation"
class="objectBox objectBox-errorMessage
hasBreakSwitch "><span class="errorMessage ">ReferenceError:
wms_ruas is not defined.<br>
Penso que não está a conseguir ir buscar o layer
ao geoserver, alguma segestão do que poderá ser?<br>
<br>
<br>
Obrigado pelas repostas de todos<br>
</span></span><br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 02-12-2011 09:32, Jorge de Jesus wrote:
<blockquote cite="mid:4ED89B45.1080407@pml.ac.uk"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
On 02/12/11 00:37, Pedro Costa wrote:
<blockquote cite="mid:4ED81DC3.9090109@sapo.pt"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Pessoal podem ajudar-me também nas seguintes
dúvidas:<br>
<br>
<br>
Eu tenho o html que segue em baixo, quando o
abro, o firebug indica um erro assim:<br>
<br>
<div role="listitem" class="errorTitle focusRow
subLogRow "><span class="errorMessage ">OpenLayers
is not defined</span></div>
<span class=" "></span>
<div role="listitem" class="errorSourceBox
errorSource-show focusRow subLogRow "><a
moz-do-not-send="true" title="var bounds =
new OpenLayers.Bounds(" class="errorSource
a11yFocus "> var bounds = new
OpenLayers.Bounds(<br>
<br>
<br>
</a></div>
</blockquote>
"OpenLayers is not defined" acho que este e' o
error que tens, parece que a pagina nao carregou o
OpenLayers.js. Ve no tab "Net">js do firefox
se ele carregou o OpenLayers, experimenta usar a
versao online: <br>
<br>
<br>
<script type="text/javascript" src=<a
moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://openlayers.org/dev/OpenLayers.js">"http://openlayers.org/dev/OpenLayers.js"</a>></script><br>
<br>
<br>
Eu experimentei: var bounds = new
OpenLayers.Bounds(-23941, 208039,-21480, 210148);<br>
<br>
E esta tudo OK<br>
<br>
Quanto aos bounds, experimenta meter os bounds
iguais aos descritos no WMS (faz um pedido
getCapabilites), depois de teres adicionado o a
layer wms_ruas, podes usar wms_ruas.getExtent():<br>
<br>
map.zoomToExtent(wms_ruas.getExtent());<br>
<br>
So uma chamada de atencao o object wms_ruas so
esta totalmante operacional depois de adicionado
ao mapa e depois de feito o pedido ao servico pelo
openlayers, ate teres o objecto totalmente criado
certas variaveis e metodos dao error.<br>
<br>
Jorge<br>
<br>
<blockquote cite="mid:4ED81DC3.9090109@sapo.pt"
type="cite">
<div role="listitem" class="errorSourceBox
errorSource-show focusRow subLogRow "><a
moz-do-not-send="true" title="var bounds =
new OpenLayers.Bounds(" class="errorSource
a11yFocus "> Penso que seja porque os bounds
estão mal definidos. A minha dúvida é o
seguinte, como posso saber os bounds
correctos? E em que src tenho de os
escrever?Igual ao src do layer que quero ir
buscar?Será que funciona se eu executar no
firebug map.zoomToMaxExtent e map.getExtent
no layer preview do geoserver?<br>
<br>
Tentei isso e dá-me os valores: topp right
left e bottom, mas porque ordem os escrevo?<br>
<br>
<br>
Podem tirar-me estas dúvidas?<br>
<br>
Obrigado<br>
</a></div>
<br>
<br>
<br>
<?xml version="1.0" encoding="UTF-8"?><br>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0
Strict//EN" "DTD/xhtml1-strict.dtd"><br>
<html xmlns=<a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="http://www.w3.org/1999/xhtml">"http://www.w3.org/1999/xhtml"</a>><br>
<head><br>
<title>O meu primeiro
mapa</title><br>
<meta http-equiv="Content-Type"
content="text/html; charset=UTF-8" /><br>
<script
src="/openlayers/lib/OpenLayers.js"
type="text/javascript"></script><br>
<script type="text/javascript"><br>
var map;<br>
function init() {<br>
<br>
var bounds = new
OpenLayers.Bounds(<br>
-23941, 208039,<br>
-21480, 210148<br>
);<br>
<br>
var options = {<br>
controls: [ new
OpenLayers.Control.Navigation(),<br>
new
OpenLayers.Control.PanZoom(),<br>
new
OpenLayers.Control.LayerSwitcher()],<br>
maxExtent: bounds,<br>
maxResolution: 9.61328125,<br>
projection: "EPSG:27492",<br>
units: 'm'<br>
<br>
};<br>
<br>
map = new OpenLayers.Map('map',
options);<br>
var wms = new
OpenLayers.Layer.WMS(<br>
'OpenLayers WMS',<br>
'<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://localhost:8080/geoserver/wms">http://localhost:8080/geoserver/wms</a>',
{<br>
layers: 'topp:ruas'<br>
}, {} );<br>
map.addLayer(wms);<br>
if(!map.getCenter()) {<br>
map.zoomToMaxExtent();<br>
}<br>
}<br>
</script><br>
</head><br>
<body onload='init();'><br>
<h1>Mapa mundo</h1><br>
<div id='map' style='width: 500px;
height: 500px;'><br>
</div><br>
</body><br>
</html><br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 01-12-2011 13:22, Jorge de Jesus wrote:
<blockquote
cite="mid:4ED77F7F.8030107@pml.ac.uk"
type="cite">
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
<title></title>
Algumas respostas peco desculpas pelo email
meio algarviado<br>
<br>
<br>
On 01/12/11 12:41, Pedro Costa wrote:
<blockquote
cite="mid:4ED77615.6010209@sapo.pt"
type="cite">
<meta content="text/html;
charset=ISO-8859-1"
http-equiv="Content-Type">
Pessoal será que podiam ajudar-me com as
seguintes dúvidas do openlayeres, as dúvidas
são relativas ao exemplo disponivel aqui:<br>
<br>
<a moz-do-not-send="true"
href="http://geobox.geospot.pt/pt/index.php/Edi%C3%A7%C3%A3o_com_OpenLayers">http://geobox.geospot.pt/pt/index.php/Edi%C3%A7%C3%A3o_com_OpenLayers</a><br>
<br>
<br>
<b>1) O que sgnificam estas diferentes
partes do código:</b><br>
<pre class="de1"><span class="sc2"><<span class="kw2">link</span> <span class="kw3">rel</span><span class="sy0">=</span><span class="st0">"stylesheet"</span> <span class="kw3">href</span><span class="sy0">=</span><span class="st0">"/openlayers/theme/default/style.css"</span> <span class="kw3">type</span><span class="sy0">=</span><span class="st0">"text/css"</span> <span class="sy0">/</span>></span></pre>
<pre class="de1"><span class="sc2">
</span></pre>
</blockquote>
Isto e' un link pro CSS (cascade style sheet)
que define como varios elementos vao ser
rendizados (rendered), ou seja cores, tipos de
letras icons, e onde os menus (exemplo:
LayerSwitcher) vao aparecer etc. Da uma vista
de olhos ao ficheiro e experimenta a fazer
alteracoes :) .Se nao sabes trabalhar com CSS
da uma vista de olhos a: <a
moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://www.w3schools.com/css/">http://www.w3schools.com/css/</a><br>
<blockquote
cite="mid:4ED77615.6010209@sapo.pt"
type="cite">
<pre class="de1"><span class="sc2"></span><span class="sc2"><pre class="de1">OpenLayers.ProxyHost = "/cgi-bin/proxy.cgi?url=";
</pre></span></pre>
</blockquote>
Aiiiiiii a santa bendita proxy !!! Da uma
vista de olhos aqui: <a
moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://trac.osgeo.org/openlayers/wiki/FrequentlyAskedQuestions#ProxyHost">http://trac.osgeo.org/openlayers/wiki/FrequentlyAskedQuestions#ProxyHost</a>
<br>
<br>
Basicamente em Javascript tu nao podes chamar
um URL que nao esteja no mesmo dominio, por
exemplo se o teu site esta em <a
moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://localhost">http://localhost</a>
mas o WFS esta em <a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://WFSsite.pt">http://WFSsite.pt</a>
o codigo de javascipript nao pode aceder a <a
moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://WFSsite.pt">http://WFSsite.pt</a>,
esta situacao eh conhecida por "cross domain"
da uma vista de olhos na internet<br>
<br>
Actualmente os browsers mais recentes podem
contactar outros dominios se o servidor no
outro dominio suportar a norma CORS: <a
moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://www.leggetter.co.uk/2010/03/12/making-cross-domain-javascript-requests-using-xmlhttprequest-or-xdomainrequest.html">http://www.leggetter.co.uk/2010/03/12/making-cross-domain-javascript-requests-using-xmlhttprequest-or-xdomainrequest.html</a><br>
<br>
Basicamente, a melhor estrategia eh de
instalar a proxy no teu servidor e deixar que
o openlayers trate do assunto.<br>
<br>
Normalmente, o firebug manda-te um erro quando
tens cross-domain (normalmente o browser nao
diz nada e nao faz nada quando tens
cross-domain)<br>
<blockquote
cite="mid:4ED77615.6010209@sapo.pt"
type="cite">
<pre class="de1"><span class="sc2"><pre class="de1"><b>2) Porquê é que aqui a classe map é nula?</b>
</pre></span></pre>
</blockquote>
<br>
var map=null; Bem uns gostam cozido outros
gosta de assado :0 eh so um estilo de
programacao, se usares var map; vai dar ao
mesmo. Uma chamada de atencao, o var map=null;
esta fora da funcao init(), quer dizer que eh
uma variable global, que pode ser acedida por
qualquer funcao. Normalmente um erro comum e'
meter "var map" dentro do init()<br>
<br>
Pessoalmente meto o map e as layers sempre
fora da funcao de inicializacao, ja que
variaveis globais parecem logo no firebug.<br>
<br>
<br>
<blockquote
cite="mid:4ED77615.6010209@sapo.pt"
type="cite">
<pre class="de1"><span class="sc2"><pre class="de1"><span class="sc2"><pre class="de1"><pre class="de1">var map = null;
<b>3) NO exemplo em questão que segue em baixo, temos de por o schema para o layer do geoserver em questão, trata-se de
um url? Como posso descobrir url para o layer que pretendo? Tentei trocar o nome deste exemplo (participante)
por um layer que tenho e colar no browser mas não abre nada...
POdem dar-me uma dicas?
</b></pre></pre></span></pre></span></pre>
</blockquote>
<br>
Eu raramente trabalho com WFS e estive a ver
no codigo do openlayers (Protocol/WFS/v1.js)
temos a seguinte definicao da propriedade
schema:<br>
<br>
/**<br>
* Property: schema<br>
* {String} Optional schema location that
will be included in the<br>
* schemaLocation attribute value.
Note that the feature type schema<br>
* is required for a strict XML
validator (on transactions with an<br>
* insert for example), but is *not*
required by the WFS specification<br>
* (since the server is supposed to
know about feature type schemas).<br>
*/<br>
schema: null,<br>
<br>
<br>
Basicamente e' um URL que define o schema dos
dados em XML e que pode ser usado para validar
os conteudos, no exemplo passas um
DescribeFeatureType que gera un esquema que
define a estrutura do XML dos teus dados. Em
varios exemplos nunca vi o uso do schema:<br>
<br>
<a moz-do-not-send="true"
class="moz-txt-link-freetext"
href="http://workshops.opengeo.org/stack-intro/openlayers.html">http://workshops.opengeo.org/stack-intro/openlayers.html</a><br>
<br>
Eu uso mais mapserver, ja que nao me dou muito
bem com o JAVA (serei demasiado calhau?) <br>
<br>
<blockquote
cite="mid:4ED77615.6010209@sapo.pt"
type="cite">
<pre class="de1"><span class="sc2"><pre class="de1"><span class="sc2"><pre class="de1"><pre class="de1"><b>
4)Quando devo utilizar a livraria do openlayers no localhost e quando devo utilizar a online?Tanto faz ou quais as vantagens
de um e de outro?
Obrigado
Bom feriado a todos
</b>
</pre></pre></span></pre></span></pre>
</blockquote>
uma livraria no localhost e' mais rapida para
fazer o upload e nao estas dependente de
"terceiros" <br>
<br>
E para concluir: O firebug e' o melhor amigo
do Homem (depois do cao e' claro)<br>
<br>
<br>
Bom feriado, eu vou marfar <br>
<br>
Jorge<br>
<br>
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