Arnd, Did you mean I can display image right inside polygon? I attached the screenshot here that shows my polygons.
Each of these polygons represents the four corners of sensed images from devices of aircrafts. Thanks. JK -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Monday, August 29, 2011 1:21 PM To: JK Chen Cc: [email protected] Subject: AW: [OpenLayers-Users] how to change the size of OpenLayers.Layer.Image Hi, new OpenLayers.Bounds(-118.354,32.834, -118.383, 32.819) should be new OpenLayers.Bounds(left, bottom, right, top) but -118.354 > -118.383 32.834 > 32.819 try new OpenLayers.Bounds(-118.383, 32.819, -118.354,32.834) Openlayers can't display rotated images as Layer.Image. If you want to display rotated images, you can use as workaround a vector layer with point feature and externalGraphic. Good Luck Arnd -----Ursprüngliche Nachricht----- Von: JK Chen [mailto:[email protected]] Gesendet: Montag, 29. August 2011 18:16 An: [email protected]; [email protected] Betreff: RE: [OpenLayers-Users] how to change the size of OpenLayers.Layer.Image Well, it is not working for me. My image is not up-right rectangle. Mine are skewed rectangles. 1. The BBOX for OpenLayers.Image does not have a way to specify that, Please, OL folks can you confirm that? 2. If I put in the two values of bottom left and top right, my image will not load. 3. If I specify (-180, -90, 180, 90) for BBox, my image will load. But as you know, it is not correct. In terms of aspect ratio. Here is my image, it's four corners, and my OL code. My image is NITF military image, I have converted to JPEG listed in this email. Thanks. -- ol code -- map = new OpenLayers.Map('map_element', {}); var image_layer = new OpenLayers.Layer.Image( 'Wallpaper', 'http://localhost:8080/198/lynx2003050817522799.ntf.jpg', //'http://localhost:8080/187/31AUG939Z0000002ZX000013ZZ0000004DB89A19.ntf.jp g', //'http://earthtrends.wri.org/images/maps/4_m_citylights_lg.gif', //new OpenLayers.Bounds(-180,-90,180,90), // this will display the image, but of course it's not right in aspect ratio new OpenLayers.Bounds(-118.354,32.834, -118.383, 32.819), // these values are "correct", but the image will NOT load new OpenLayers.Size(0,0), {numZoomLevels:10, maxResolution:.625} ); --- the four corners Corner Coordinates: Upper Left (-118.3786921, 32.8152343) (118d22'43.29"W, 32d48'54.84"N) Lower Left (-118.3537928, 32.8343191) (118d21'13.65"W, 32d50'3.55"N) Upper Right (-118.3825927, 32.8188274) (118d22'57.33"W, 32d49'7.78"N) Lower Right (-118.3576934, 32.8379122) (118d21'27.70"W, 32d50'16.48"N) Center (-118.3681927, 32.8265733) (118d22'5.49"W, 32d49'35.66"N) --- my image (nitf) display in OpenEV -- my image file (jpeg) JK -----Original Message----- From: JK Chen Sent: Monday, August 29, 2011 8:00 AM To: '[email protected]' Cc: [email protected] Subject: RE: [OpenLayers-Users] how to change the size of OpenLayers.Layer.Image Very good. Thanks. BTW, the example says the size value has no effect. Perfect for me. Regards. -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Thursday, August 25, 2011 12:38 PM To: JK Chen Cc: [email protected] Subject: AW: [OpenLayers-Users] how to change the size of OpenLayers.Layer.Image Hi, You have to know the width and height in map units and the insert point for your image. Say x0,y0 und w,h im map units, then imgLayer.extent=new OpenLayers.Bounds(x0,y0,x0+w,y0+h); Here you can see, how it works: http://gis.ibbeck.de/OLClient/examples/ArcGIS93Rest.html Regards, Arnd -----Ursprüngliche Nachricht----- Von: JK Chen [mailto:[email protected]] Gesendet: Donnerstag, 25. August 2011 16:23 An: [email protected] Cc: [email protected] Betreff: RE: [OpenLayers-Users] how to change the size of OpenLayers.Layer.Image Suppose my image is w and h, how I code? Into extent? Why? -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Wednesday, August 24, 2011 6:20 PM To: JK Chen Cc: [email protected] Subject: AW: [OpenLayers-Users] how to change the size of OpenLayers.Layer.Image Hi, Try to set a new extent for the layer: imgLayer.extent=new OpenLayers.Bounds(-70,-10,70,10); This is perhaps needed to refresh the layer imgLayer.setVisibility(false); imgLayer.setVisibility(true); Arnd -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von jk Gesendet: Mittwoch, 24. August 2011 21:27 An: [email protected] Betreff: [OpenLayers-Users] how to change the size of OpenLayers.Layer.Image Hi, I am trying to use OL to view military images, jpeg, of various dimensions. I need to maintain the orginal aspect. Now, how to specify the size values when creating a new Layer.Image? Is it possible to change those values after image loads? How? Thanks. JK -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/how-to-change-the-size-of-OpenLayers- Layer-Image-tp6721664p6721664.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
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