Hey Michael, "I'm assuming that your WMS is serving an image in response to a GetMap > request and so by "render the image to a map" you mean create a new > output image showing your raster data in the required projection, > possibly also with other layers displayed. Is that correct ?"
This is exactly what I am trying to do but with only one layer. Do I have to use an other layer , if my input image needs to be reprojected? But thanks for the advice with the Directlayer. I will try it. Timon 2012/6/19 Michael Bedward <[email protected]>: > Hi Timon, > > I'm suspect I don't understand your question properly because of my > ignorance of WMS so I'm copying this reply to Andrea and Jody (core > GeoTools and GeoServer developers) in the hope that they can give you > more assistance. > >> I will try to provide the information about my task, which is to >> implement an extension to Geoserver. >> We have our data saved as a blob in a postgre database and i shall >> implement a Web Map Service. >> To be OGC conform i have to implement the methods GetMap and GetCapabilities. >> >> That is my task. >> When there is a getMap-Request, i read the data from the database and >> create a BufferedImage with a >> ColorMap, which is also saved in the database. >> My Problem occur when i try to render the BufferedImage to a map. > > I'm assuming that your WMS is serving an image in response to a GetMap > request and so by "render the image to a map" you mean create a new > output image showing your raster data in the required projection, > possibly also with other layers displayed. Is that correct ? > > If your input image does not need to be reprojected, you can render it > by using a DirectLayer. This is a Layer class with an abstract draw > method which you implement in a sub-class to display whatever you > want... > > http://docs.geotools.org/latest/javadocs/org/geotools/map/DirectLayer.html > > You could draw your buffered image into the Graphics2D instance which > is passed as an arg to the draw method. > > The general approach is then much as in my original reply: create a > MapContent, add required layers including your DirectLayer sub-class > to draw the image, and associated the MapContent with a > StreamingRenderer. > > I hope that helps more. If not, perhaps Andrea and Jody can pick up > the story - they know infinitely more than me :) > > Michael ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ GeoTools-GT2-Users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
