[Geotools-gt2-users] Assistance with ImagePyramidReader
Hi, Could some kind soul give me a nudge with regards to the ImagePyramidReader? I have a pyramid already constructed but I want to be able to retrieve a scaled image, not just the full-size. The brief code I am using is: ImagePyramidReader reader = new ImagePyramidReader(new File(PYRAMID_PATH)); GridCoverage2D grid = (GridCoverage2D)reader.read(null); ImageIO.write(grid.getRenderedImage(), PNG, new File(/home/pyramid-test/pyramid_out.png)); This results in a full-sized rendering of the pyramid. How do I configure it to render something at 50% (for example)? I am guessing that I need to feed GeneralParameterValues to reader.read(...) but after looking through the javadocs and the examples I am just not coming up with the solution. Any assistance would be greatly appreciated, and I would be glad to add the resulting snippet to the examples section of the site. Thanks, Kevin - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
Re: [Geotools-gt2-users] Assistance with ImagePyramidReader
Ciao Ken, please, read below... On Thu, Apr 17, 2008 at 12:45 AM, Kevin Ward [EMAIL PROTECTED] wrote: Hi, Could some kind soul give me a nudge with regards to the ImagePyramidReader? I have a pyramid already constructed but I want to be able to retrieve a scaled image, not just the full-size. The brief code I am using is: ImagePyramidReader reader = new ImagePyramidReader(new File(PYRAMID_PATH)); GridCoverage2D grid = (GridCoverage2D)reader.read(null); ImageIO.write(grid.getRenderedImage(), PNG, new File(/home/pyramid-test/pyramid_out.png)); This results in a full-sized rendering of the pyramid. How do I configure it to render something at 50% (for example)? You need to supply the reader with a gridgeometry that contains the desired spatial region as an envelope and the target dimension of the raster you wnat to obtain. This will force the reader to do crop and subsample. You can check the tests of the ImagePyramidReader class, specifically ImagePyramidReaderTest. A snippet can be found here: http://pastebin.com/m3e506325 Which version of the code have you used to generate the pyramid? Ciao, Simone. I am guessing that I need to feed GeneralParameterValues to reader.read(...) but after looking through the javadocs and the examples I am just not coming up with the solution. Any assistance would be greatly appreciated, and I would be glad to add the resulting snippet to the examples section of the site. Thanks, Kevin - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users -- --- Eng. Simone Giannecchini President /CEO GeoSolutions S.A.S. Via Carignoni 51 55041 Camaiore (LU) Italy phone: +39 0584983027 fax: +39 0584983027 mob: +39 333 8128928 http://www.geo-solutions.it --- - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
Re: [Geotools-gt2-users] Assistance with ImagePyramidReader
Ciao Simone! Thank you very much! That was the nudge that I needed. I used it.geosolutions.utils.imagepyramid.PyramidBuilder from the modules/unsupported/coveragetools in 2.4.1 to generate my pyramid. Kevin On Wed, Apr 16, 2008 at 3:52 PM, Simone Giannecchini [EMAIL PROTECTED] wrote: Ciao Kevin, please, read below... On Thu, Apr 17, 2008 at 12:45 AM, Kevin Ward [EMAIL PROTECTED] wrote: Hi, Could some kind soul give me a nudge with regards to the ImagePyramidReader? I have a pyramid already constructed but I want to be able to retrieve a scaled image, not just the full-size. The brief code I am using is: ImagePyramidReader reader = new ImagePyramidReader(new File(PYRAMID_PATH)); GridCoverage2D grid = (GridCoverage2D)reader.read(null); ImageIO.write(grid.getRenderedImage(), PNG, new File(/home/pyramid-test/pyramid_out.png)); This results in a full-sized rendering of the pyramid. How do I configure it to render something at 50% (for example)? You need to supply the reader with a gridgeometry that contains the desired spatial region as an envelope and the target dimension of the raster you wnat to obtain. This will force the reader to do crop and subsample. You can check the tests of the ImagePyramidReader class, specifically ImagePyramidReaderTest. A snippet can be found here: http://pastebin.com/m3e506325 Which version of the code have you used to generate the pyramid? Ciao, Simone. I am guessing that I need to feed GeneralParameterValues to reader.read(...) but after looking through the javadocs and the examples I am just not coming up with the solution. Any assistance would be greatly appreciated, and I would be glad to add the resulting snippet to the examples section of the site. Thanks, Kevin -- --- Eng. Simone Giannecchini President /CEO GeoSolutions S.A.S. Via Carignoni 51 55041 Camaiore (LU) Italy phone: +39 0584983027 fax: +39 0584983027 mob: +39 333 8128928 http://www.geo-solutions.it --- -- Kevin Ward NASA Earth Observations (NEO) Science Systems and Applications, Inc. [EMAIL PROTECTED] 503-977-2970 (home) Office Hours 7:30am-4pm Pacific Time http://neo.sci.gsfc.nasa.gov/ http://earthobservatory.nasa.gov/ - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
Re: [Geotools-gt2-users] Assistance with ImagePyramidReader
Ciao kevin, please, let me know how it goes since I have some changes for pyramid creation pending on my HD (sorry, only for gt-trunk) hence if you run into any problems Iwould be glad to help you out. Simone. On Thu, Apr 17, 2008 at 1:11 AM, Kevin Ward [EMAIL PROTECTED] wrote: Ciao Simone! Thank you very much! That was the nudge that I needed. I used it.geosolutions.utils.imagepyramid.PyramidBuilder from the modules/unsupported/coveragetools in 2.4.1 to generate my pyramid. Kevin On Wed, Apr 16, 2008 at 3:52 PM, Simone Giannecchini [EMAIL PROTECTED] wrote: Ciao Kevin, please, read below... On Thu, Apr 17, 2008 at 12:45 AM, Kevin Ward [EMAIL PROTECTED] wrote: Hi, Could some kind soul give me a nudge with regards to the ImagePyramidReader? I have a pyramid already constructed but I want to be able to retrieve a scaled image, not just the full-size. The brief code I am using is: ImagePyramidReader reader = new ImagePyramidReader(new File(PYRAMID_PATH)); GridCoverage2D grid = (GridCoverage2D)reader.read(null); ImageIO.write(grid.getRenderedImage(), PNG, new File(/home/pyramid-test/pyramid_out.png)); This results in a full-sized rendering of the pyramid. How do I configure it to render something at 50% (for example)? You need to supply the reader with a gridgeometry that contains the desired spatial region as an envelope and the target dimension of the raster you wnat to obtain. This will force the reader to do crop and subsample. You can check the tests of the ImagePyramidReader class, specifically ImagePyramidReaderTest. A snippet can be found here: http://pastebin.com/m3e506325 Which version of the code have you used to generate the pyramid? Ciao, Simone. I am guessing that I need to feed GeneralParameterValues to reader.read(...) but after looking through the javadocs and the examples I am just not coming up with the solution. Any assistance would be greatly appreciated, and I would be glad to add the resulting snippet to the examples section of the site. Thanks, Kevin -- --- Eng. Simone Giannecchini President /CEO GeoSolutions S.A.S. Via Carignoni 51 55041 Camaiore (LU) Italy phone: +39 0584983027 fax: +39 0584983027 mob: +39 333 8128928 http://www.geo-solutions.it --- -- Kevin Ward NASA Earth Observations (NEO) Science Systems and Applications, Inc. [EMAIL PROTECTED] 503-977-2970 (home) Office Hours 7:30am-4pm Pacific Time http://neo.sci.gsfc.nasa.gov/ http://earthobservatory.nasa.gov/ -- --- Eng. Simone Giannecchini President /CEO GeoSolutions S.A.S. Via Carignoni 51 55041 Camaiore (LU) Italy phone: +39 0584983027 fax: +39 0584983027 mob: +39 333 8128928 http://www.geo-solutions.it --- - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
