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</o:shapelayout></xml><![endif]--></head><body lang=IT link=blue vlink=purple><div class=WordSection1><div><div><div><p><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hello everybody,<br></span><span lang=EN-US style='color:#1F497D'>I have discovered a blocking problem with projectionObj. I have some layers in WGS84 that want to reproject in Sferical Mercatore (google maps) on the fly, then send back a PNG image to the client.<br>Here is my code:<o:p></o:p></span></p><p><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:blue'>protected</span> <span style='color:blue'>virtual</span> <span style='color:blue'>void</span> DrawAMap(<span style='color:#2B91AF'>HttpContext</span> context)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:blue'>bool</span> exists;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:blue'>string</span> filename = <span style='color:#2B91AF'>RequestParser</span>.GetParamAsString(context.Request, <span style='color:#A31515'>"map"</span>, <span style='color:blue'>out</span> exists);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:#2B91AF'>mapObj</span> map = <span style='color:blue'>new</span> <span style='color:#2B91AF'>mapObj</span>(filename);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> map.width = <span style='color:#2B91AF'>RequestParser</span>.GetParamAsInteger(context.Request, <span style='color:#A31515'>"width"</span>, <span style='color:blue'>out</span> exists);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> map.height = <span style='color:#2B91AF'>RequestParser</span>.GetParamAsInteger(context.Request, <span style='color:#A31515'>"height"</span>, <span style='color:blue'>out</span> exists);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:#2B91AF'>rectObj</span> bbox = <span style='color:#2B91AF'>RequestParser</span>.GetParamAsExtent(context.Request, <span style='color:#A31515'>"bbox"</span>, <span style='color:blue'>out</span> exists);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> map.setProjection(<span style='color:#A31515'>"+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 +nadgrids=@null +wktext +no_defs"</span>);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:#2B91AF'>projectionObj</span> projMercatore = <span style='color:blue'>null</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:#2B91AF'>projectionObj</span> projWGS84 = <span style='color:blue'>null</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:blue'>if</span> (projMercatore == <span style='color:blue'>null</span>)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> projMercatore = <span style='color:blue'>new</span> <span style='color:#2B91AF'>projectionObj</span>(MERCATORE_PROJ4);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:blue'>if</span> (projWGS84 == <span style='color:blue'>null</span>)<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> {<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> projWGS84 = <span style='color:blue'>new</span> <span style='color:#2B91AF'>projectionObj</span>(WGS84_PROJ4);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> }<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:gray'>///</span><span style='color:green'>HERE first time OK, second or third time hangs!!!</span><o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> bbox.project(projWGS84, projMercatore);<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> map.extent = bbox;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:#2B91AF'>imageObj</span> image = map.draw();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> <span style='color:#2B91AF'>MemoryStream</span> memstrm = <span style='color:blue'>new</span> <span style='color:#2B91AF'>MemoryStream</span>(image.getBytes());<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> context.Response.StatusCode = 200;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> context.Response.ContentType = <span style='color:#A31515'>"image/png"</span>;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> memstrm.Position = 0;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> context.Response.BinaryWrite(memstrm.ToArray());<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> context.Response.Flush();<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span lang=EN-US style='font-size:9.5pt;font-family:Consolas'> }<o:p></o:p></span></p><p><span lang=EN-US style='color:#1F497D'>Environtment: MapScript C# + VS2010 + ASP.NET 3.5 + IIS7.0 + MapServer 6.0.1 + Windows 7 Pro.<o:p></o:p></span></p><p><span lang=EN-US style='color:#1F497D'>Problem is that the rectObj.project() instruction hangs the second or third time it is hit. No error is visible on the eventviewer, I just have to reset IIS. If I avoid reprojecting, this code works just fine. Same code worked using mapscript_csharp.dll from a Delphi program, so I suppose that the problem should be in the C# SWIG interface. Am I missing something?<o:p></o:p></span></p><p><span lang=EN-US style='color:#1F497D'>Thanks<o:p></o:p></span></p><p><span lang=EN-US style='color:#1F497D'>Fabrizio<o:p></o:p></span></p><p><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p></div></div></div></div></body></html>