[Portugal] duvidas sobre openlayers
Hugo
hfpmartins gmail.com
Terça-Feira, 13 de Dezembro de 2011 - 13:11:56 EST
Olá Pedro,
Quem espera sempre alcança... neste caso Quem bate com a cabeça mais tarde
ou mais cedo resolve...
A entrada pode ser um pouco dolorosa mas não desistas, pois, o OpenLayers é
de facto uma biblioteca espectacular que te permitirá desenvolveres coisas
fantásticas à tua medida... E o conhecimento vai ficando. Isso é o mais
importante.
Boa sorte e um abc,
Hugo
2011/12/13 Pedro Costa <pedrocostaarma at sapo.pt>
> Resolvido finalmente...Tive de mudar nessa parte e acertar com a ordem.
>
>
>
> PS:Só é pena ter demorado tanto para uma coisa tão simples lol!
>
>
>
>
> On 13-12-2011 15:34, Hugo wrote:
>
> Se calhar o teu problema são as coordenadas que estás a passar para o
> OpenaLayers.Bounds.
> Confirma que tens as coordenadas certas (por exemplo através do QGis ou do
> PostGIS)
>
> Abc,
> Hugo
>
> 2011/12/13 Pedro Costa <pedrocostaarma at sapo.pt>
>
>>
>>
>> Bem agora começa a fazer sentido, tenho de mudar nesta parte:
>>
>> // set default position
>> map.zoomToExtent(new OpenLayers.Bounds(5062994.9488977,
>> -932033.61453498,
>> -916746.20888068,
>>
>> 5071594.1145783));
>>
>>
>> Aqui já muda para uma área 'com alguma coisa'...
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On 13-12-2011 15:20, Pedro Costa wrote:
>>
>>
>> HUgo nesta parte do código:
>>
>> // set default position
>> map.zoomToExtent(new OpenLayers.Bounds(880000,
>> 6840000,
>> 915000,
>> 6860000));
>>
>> Também tenho de inserir os valores respectivos certo?
>>
>>
>>
>>
>>
>>
>>
>>
>> On 13-12-2011 15:01, Hugo wrote:
>>
>> Olá Pedro,
>>
>> tens que fazer um map.setCenter();
>>
>> Abc,
>> Hugo
>>
>> 2011/12/13 Pedro Costa <pedrocostaarma at sapo.pt>
>>
>>> Não entendo porque inseri os bounds da area que pretendo e ele abre com
>>> uma area completamente diferente...
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On 13-12-2011 12:57, Hugo wrote:
>>>
>>> Aqui vai.
>>> um abc,
>>>
>>> Hugo
>>>
>>>
>>> map.events.register('zoomend', map, function(){
>>> var mapProj = map.getProjection();
>>> var mapZoom = map.getZoom();
>>> var mapRes = map.getResolutionForZoom(mapZoom);
>>> if (mapProj == 'EPSG:900913' && mapRes > 306){
>>> map.zoomToScale(866688.0326989387, true);
>>> }
>>> });
>>>
>>> 2011/12/13 Pedro Costa <pedrocostaarma at sapo.pt>
>>>
>>>> Conheces algum exemplo do evento zoomend para eu tentar guiar-me?
>>>>
>>>> Obrigado
>>>>
>>>> Em 13-12-2011 12:45, Hugo escreveu:
>>>>
>>>> Experimenta adicionar o seguinte às opções do teu mapa:
>>>>
>>>> restrictedExtent: new OpenLayers.Bounds(.....);
>>>>
>>>>
>>>> De qualquer maneira, qd usas layers comerciais (google, yahoo, etc),
>>>> tens que definir tb nas layers algumas restrições nomeadamente as
>>>> resoluções máximas, etc...
>>>>
>>>> Ou seja, o facto de definires o restricted extent não vai impedir de
>>>> veres o mundo inteiro. Então podes fazer como te disse, ou ainda, podes
>>>> adicionar um evento ao map on zoomend e detectas qual a resolução e se for
>>>> maior que aquela que tu queres permitir entao fazes um zoom ao mapa...
>>>> desta forma consegues eliminar a visualização do mundo inteiro.
>>>>
>>>> Abc,
>>>>
>>>> Hugo
>>>>
>>>> 2011/12/13 Pedro Costa <pedrocostaarma at sapo.pt>
>>>>
>>>>> Obrigado Hugo.
>>>>> Eu estou a tentar que o exemplo do link abra na área que pretendo mas
>>>>> está dificil.
>>>>>
>>>>> http://www.pgrouting.org/docs/ol-workshop/ch05.html
>>>>>
>>>>> Por exemplo, abri o exemplo original fiz zoom na área que pretendo e
>>>>> com o firebug fiz map.getExtent(). Assim obtive os valores da bounding box
>>>>> que queria penso eu:
>>>>>
>>>>> bottom
>>>>> 5066053.4452291
>>>>> left
>>>>> -929102.37877511
>>>>> right
>>>>> -921458.67594797
>>>>> top
>>>>> 5070353.0280693
>>>>>
>>>>> A seguir inseri na variavel options coloquei estes valores mas mesmo
>>>>> assim não, abre na área que queria.
>>>>>
>>>>> Alguém tem ideia porquê?
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On 13-12-2011 12:16, Pedro Costa wrote:
>>>>>
>>>>> Pessoal podem ajudar-me no seguinte:
>>>>> Tenho esta parte do código:
>>>>>
>>>>>
>>>>> var options = {
>>>>>
>>>>> projection: new OpenLayers.Projection("EPSG:900913"),
>>>>>
>>>>> units: "m",
>>>>>
>>>>> numZoomLevels: 22,
>>>>>
>>>>> maxResolution: 156543.0339,
>>>>>
>>>>> maxExtent: new OpenLayers.Bounds(-20037508, -20037508,
>>>>>
>>>>> 20037508, 20037508.34)
>>>>>
>>>>> };
>>>>>
>>>>>
>>>>> retirado de: http://www.pgrouting.org/docs/ol-workshop/ch05.html
>>>>>
>>>>>
>>>>> Significa que o mapa vai estar na projecção 900913. Neste exempo eu
>>>>> quero mudar a area a ser apresentada por isso tenho de mudar o maxExtend
>>>>> certo?
>>>>> A questão é se eu no geoserver definir o srs como 900913 e calcular,
>>>>> tenho os valores da bounding box,e é so substituir ou estou errado?
>>>>>
>>>>> Pelo que percebi:
>>>>>
>>>>> -20037508
>>>>> (left = min X)
>>>>>
>>>>> -20037508
>>>>> (bottom = min y)
>>>>> 20037508
>>>>>
>>>>> (right = max X)
>>>>> 20037508.34
>>>>>
>>>>> (top = max y)
>>>>>
>>>>>
>>>>> Estou correcto?
>>>>>
>>>>> obrigado
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On 13-12-2011 11:11, Jorge de Jesus wrote:
>>>>>
>>>>>
>>>>> Oi
>>>>>
>>>>> Pelo que vejo:
>>>>>
>>>>> 1) Nao tens a proxy instalada para poderes contactar
>>>>> http://localhost:8080
>>>>>
>>>>>
>>>>> http://trac.osgeo.org/openlayers/wiki/FrequentlyAskedQuestions#HowdoIsetupaProxyHost
>>>>>
>>>>> Ate teres a proxy instalada o browser nao vai pedir nada ao servidor...
>>>>>
>>>>> 2) Tens duas vezes projection:
>>>>> projection: 'map.getProjectionObject()',
>>>>> reproject: 'True',
>>>>> projection: new OpenLayers.Projection('4326'),
>>>>>
>>>>> Geralmente JS usa o ultimo valor definido, portanto estas a usar
>>>>> projeccao 4325
>>>>>
>>>>> 3) O uso correct the OpenLayers.Projection e' com EPSG
>>>>>
>>>>> OpenLayers.Projection("EPSG:4326")
>>>>>
>>>>> All the best
>>>>>
>>>>> Jorge
>>>>>
>>>>>
>>>>> On 13/12/11 10:50, Pedro Costa wrote:
>>>>>
>>>>> Acho que o problema é mesmo os wms que não são reprojectados:
>>>>> Reparem neste exemplo que fiz:
>>>>>
>>>>>
>>>>> http://pastebin.com/6i9TEWsH
>>>>>
>>>>>
>>>>>
>>>>> Simplesmente não aparece o wms
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On 12-12-2011 09:38, Jorge de Jesus wrote:
>>>>>
>>>>>
>>>>> Bons dias
>>>>>
>>>>>
>>>>> Bem, se tens acerteza que o wms funciona sem problemas sem o layer
>>>>> proprietario, o mais provavel e' que o WMS nao supporta EPSG:900913 ou gera
>>>>> um erro quando fazes o pedido.
>>>>>
>>>>> No firebug, ve os pedidos feitos pela pagina (Seccao Net) e ve o
>>>>> pedido feito ao servidor e a resposta data.
>>>>>
>>>>> Por exemplo tenho um sistema que faz o seguinte pedido:
>>>>>
>>>>>
>>>>> http://localhost/rasdaman/wms.py?LAYERS=rasdamanImage&FORMAT=image%2Fpng&TIME=2011-06-20&STRATEGIES=%5Bobject%20Object%5D&TRANSPARENT=TRUE&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A900913&BBOX=-6300637.7833253,4684889.401321,6076045.8348875,10359574.380423&WIDTH=1265&HEIGHT=580
>>>>>
>>>>> Experimenta a fazer um pedido ao teu WMS usando SRS=EPSG%3A900913
>>>>>
>>>>> Jorge
>>>>>
>>>>>
>>>>> On 10/12/11 15:25, Pedro Costa wrote:
>>>>>
>>>>> Jorge,
>>>>>
>>>>> Sim lembro-me.Esclarece-me só a seguinte dúvida, o que é que o browser
>>>>> não está a conseguir ir buscar na tua opinião mais precisamente? É que ele
>>>>> vai buscar o layer proprietário, os wms é que não. Mas noutros exercicios
>>>>> que efectuei sem o layer proprietario ele ia buscar tudo.
>>>>>
>>>>>
>>>>> Obrigado
>>>>> bom fim de semana
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On 10-12-2011 09:26, Jorge Mendes de Jesus wrote:
>>>>>
>>>>> Oi
>>>>>
>>>>> Parece tudo em ordem, mas tens um ligeiro problema :)
>>>>>
>>>>> Lembras-te da explicacao relativa a cross-domain, ou seja podes acecer
>>>>> a outros URLs partir de Javascript ?! Pois quando tens um url com uma porta
>>>>> diferente tens a mesma situacao, ou seja:
>>>>>
>>>>> http://localhost:8080
>>>>>
>>>>> è um URL differente e tens de usar uma proxy para buscar os
>>>>> resultados. Eu sempre pensei que mesmo com uma porta difererente nao
>>>>> haveria problemas mas à alguns meses algume teve o mesmo problema e foi
>>>>> tudo explicado no mailing list, acho que podes procurar no google pelos
>>>>> emails mais antigos.
>>>>>
>>>>> Alem disso, tens o WMS a funcionar a 100%? Experimentaste a fazer uma
>>>>> pedido com EPSG:900913 ??
>>>>>
>>>>> Jorge
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: portugal-bounces at lists.osgeo.org on behalf of Pedro Costa
>>>>> Sent: Fri 09/12/2011 13:47
>>>>> To: portugal at lists.osgeo.org
>>>>> Subject: Re: [Portugal] duvidas sobre openlayers
>>>>>
>>>>> On 09-12-2011 09:22, Jorge de Jesus wrote:
>>>>> > No meu caso nao defino a projeccao da camada WMS e o OpenLayers usa a
>>>>> > projeccao da baseLayer da google para tudo, o meu WMS tem suporte
>>>>> > nativo para 900913. Acho que devia ter tido mais atencao ao codigo e
>>>>> > seria mais correcto adicionar a informacao da projeccao
>>>>> >
>>>>> > projection: map.getProjectionObject()
>>>>>
>>>>>
>>>>>
>>>>> Tentei assim:
>>>>>
>>>>> http://pastebin.com/WLkRVbxu
>>>>>
>>>>>
>>>>> Mas continuo sem sucesso, só é visivel o layer proprietário. Nem sequer
>>>>> aparece o "+" do layer switcher, não percebo o porquê...
>>>>>
>>>>> Alguma sugestão?
>>>>>
>>>>> Obrigado
>>>>>
>>>>>
>>>>> PS: O firebug tb não detecta nenhum erro.
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>>>>
>>>>
>>>> --
>>>> Hugo Martins
>>>> LabNT - ISEGI UNL
>>>> Campus de Campolide
>>>> 1070-312 Lisboa
>>>> N 38°43'56.84", W 9°9'35.74"
>>>>
>>>>
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>>>
>>>
>>> --
>>> Hugo Martins
>>> LabNT - ISEGI UNL
>>> Campus de Campolide
>>> 1070-312 Lisboa
>>> N 38°43'56.84", W 9°9'35.74"
>>>
>>>
>>> _______________________________________________
>>> Portugal mailing listPortugal at lists.osgeo.orghttp://lists.osgeo.org/mailman/listinfo/portugal
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>>
>>
>> --
>> Hugo Martins
>> LabNT - ISEGI UNL
>> Campus de Campolide
>> 1070-312 Lisboa
>> N 38°43'56.84", W 9°9'35.74"
>>
>>
>> _______________________________________________
>> Portugal mailing listPortugal at lists.osgeo.orghttp://lists.osgeo.org/mailman/listinfo/portugal
>>
>>
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>> Portugal mailing list
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>
>
> --
> Hugo Martins
> LabNT - ISEGI UNL
> Campus de Campolide
> 1070-312 Lisboa
> N 38°43'56.84", W 9°9'35.74"
>
>
> _______________________________________________
> Portugal mailing listPortugal at lists.osgeo.orghttp://lists.osgeo.org/mailman/listinfo/portugal
>
>
>
> _______________________________________________
> Portugal mailing list
> Portugal at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/portugal
>
>
--
Hugo Martins
LabNT - ISEGI UNL
Campus de Campolide
1070-312 Lisboa
N 38°43'56.84", W 9°9'35.74"
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