Hello Christian, Check what version of sphinx you have - older versions (0.6x) have problems with the docs. I'm using 1.07.
Michael On 29 April 2011 14:21, <[email protected]> wrote: > As an tutorial here > http://docs.geotools.org/latest/userguide/index.html ? > > Title: Affine Transform > > But before I start I should be able to build the docs > > mvn clean install produces an error > > > [exec] reST markup error: > [exec] /home/christian/gt-trunk/docs/user/faq.txt:18: (SEVERE/4) > Problems with "include" directive path: > [exec] IOError: [Errno 2] No such file or directory: '/welcome/faq.txt'. > > Some hints ? > > > Quoting Jody Garnett <[email protected]>: > >> Would you like to add this to the documentation? >> >> Formally the referencing documentation asks people to understand >> what an affine transform is; providing this background would be more >> useful. >> >> -- >> Jody Garnett >> >> On Thursday, 28 April 2011 at 11:34 PM, [email protected] wrote: >>> Some times ago I wrote a mail about AffineTransforms, perhaps it >>> helps. It is possible to draw pixels using world coordinates. Please >>> read below >>> ---------------- >>> >>> Some mathematical basics here. >>> An affine transform is a powerful mechanism to transform coordinates. >>> To get the new >>> coordinates x' and y', the following calculation is done. >>> >>> [ x'] [ m00 m01 m02 ] [ x ] [ m00x + m01y + m02 ] >>> [ y'] = [ m10 m11 m12 ] [ y ] = [ m10x + m11y + m12 ] >>> [ 1 ] [ 0 0 1 ] [ 1 ] = [ 0 + 0 + 1 ] >>> >>> A simple example: >>> if you want to shift a point 5 units on the x axis and -7 units at the >>> y axis, the >>> following matrix is needed >>> >>> [ 1 0 5 ] >>> [ 0 1 -7 ] >>> [ 0 0 1 ] >>> >>> Of course, you can say this is easy, x'=x+5 and y'=y-7 would do the same. >>> >>> Another one, lets do some scaling, say factor 3 >>> >>> [ 3 0 0 ] >>> [ 0 3 0 ] >>> [ 0 0 1 ] >>> >>> This is easy too, x'=x*3 and y'=y*3 would the job. >>> >>> The power of affine transforms is that you can combine multiple >>> matrices into a single >>> one, doing a set of individual transformations within one step. There >>> is a java method >>> "concatenate(AffineTransform)" for the AffineTransform class. But be >>> careful, given 3 >>> transformatons A,B,C and you want to combine them in this order, you >>> have to go from >>> right to left. >>> C concatenate B concatenate A will give you the expected result. >>> >>> A mapping from world coordinates to pixel coordinates needs some >>> operations but can be >>> done within one affine transformation. >>> >>> The second powerful feature is that you can create an inverse >>> transform (Method >>> createInverse), which will do the mapping in the other direction out >>> of the box. >>> >>> Believe me, if you are used to use AffineTransform objects, you will >>> use them forever. >>> >>> Hope this helps >>> Cheers >>> Christian >>> ----------- >>> >>> >>> Quoting Francesca Martelli <[email protected]>: >>> >>> > Hi all, >>> > I have a problem with translation from utm coordinates in screen pixel >>> > position. I have already seen the tutorials (world2screen, >>> > data2world...), but examples reported there seem do not work in my case. >>> > >>> > I have a mapContext with shapefiles in a jmappane, and I would like to >>> > paint a point (with position expressed in UTM coordinates) over the map. >>> > >>> > Any help is greatly appreciated. >>> > Francesca >>> > >>> > >>> > -- >>> > Francesca Martelli, Computer Science Ph.D. >>> > Algorithms and Computational Mathematics Group, IIT - CNR, Pisa >>> > Phone: +39 050 315 3191 (office), +39 050 315 2333 (fax) >>> > http://www.iit.cnr.it/francesca.martelli/ >>> > email: [email protected] >>> > >>> > >>> > >>> > >>> ------------------------------------------------------------------------------ >>> > WhatsUp Gold - Download Free Network Management Software >>> > The most intuitive, comprehensive, and cost-effective network >>> > management toolset available today. Delivers lowest initial >>> > acquisition cost and overall TCO of any competing solution. >>> > http://p.sf.net/sfu/whatsupgold-sd >>> > _______________________________________________ >>> > Geotools-gt2-users mailing list >>> > [email protected] >>> > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users >>> >>> >>> >>> ---------------------------------------------------------------- >>> This message was sent using IMP, the Internet Messaging Program. >>> >>> >>> >>> ------------------------------------------------------------------------------ >>> WhatsUp Gold - Download Free Network Management Software >>> The most intuitive, comprehensive, and cost-effective network >>> management toolset available today. Delivers lowest initial >>> acquisition cost and overall TCO of any competing solution. >>> http://p.sf.net/sfu/whatsupgold-sd >>> _______________________________________________ >>> Geotools-gt2-users mailing list >>> [email protected] >>> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users >>> >> > > > > ---------------------------------------------------------------- > This message was sent using IMP, the Internet Messaging Program. > > > > ------------------------------------------------------------------------------ > WhatsUp Gold - Download Free Network Management Software > The most intuitive, comprehensive, and cost-effective network > management toolset available today. 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