Quick answer before I dig a bit. You have multiple ways to describe a coverage and somehow this is confusing.
At the very bottom line I would just used a 3D envelope using the extremes of the spatial cube your data covers. In this way you just forget about the data itself is organized. If you want to describe a bit more in detail the structure of your coverage, you need to make use of the grid element as describe here below: http://schemas.stylusstudio.com/opengis/n9b256d84/complexType_RectifiedGridType_1.html http://schemas.stylusstudio.com/opengis/n9b256d84/complexType_GridType_1.html There are various thing to point out. - You need to provide at least a 3Denvelope. - You can use the rectified grid element only if you have a regularly spaced grid (which is not your case) which means that there is an affine transformation between the internal cartesian grid crs and between the coordinates of a projected or geographic coordinate reference system. - The other option is to use the grid element which is basically for unrectified grids. Quoting the link above "Implicitly defines an unrectified grid, which is a network composed of two or more sets of equally spaced parallel lines in which the members of each set intersect the members of the other sets at right angles. " Using this element along with an envelope you could basically specify something like: "I have some data in the spatial region bounded by this envelope whose internal structure is as specified by the grid" In terms of GML/XML for the grid, I would do as follows: <gml:Grid dimension="3"> <gml:limits> <gml:GridEnvelope> <gml:low>0 0 0</gml:low> <gml:high>200 300 10</gml:high> </gml:GridEnvelope> </gml:limits> <gml:axisName>lon</gml:axisName> <gml:axisName>lat</gml:axisName> <gml:axisName>elev</gml:axisName> </gml:RectifiedGrid> With this you would be saying that, inside the envelope you also provide, you have a non regular grid where each 2d layer is of 200*300 and where you have 10 differetn levels. I think I could come up with something more complex in case you ask in order to be able to list exactly your layers, but the wholepoint is WCS 1.0 has not been designed having in mind non regular grid (as Adnrew Woolf pointed out in one of his documents). Hope that helps. Simone. On 8/10/06, Adit Santokhee <[EMAIL PROTECTED]> wrote: > Hi Simone, > > It is actually for a describe coverage operation. Suppose Ive got a 4D > coverage with depth values at irregular intervals. How am I going to > represent the depth values? > > Cheers, > > Adit > > -----Original Message----- > From: Simone Giannecchini [mailto:[EMAIL PROTECTED] > Sent: 10 August 2006 14:53 > To: Adit Santokhee > Cc: [EMAIL PROTECTED]; > [email protected] > Subject: Re: [Geotools-devel] irregular depth values > > Ciao Adit, > could you please be a bit more specific? Are you talking about a > describ coverage or what? > > Simone. > > On 8/10/06, Adit Santokhee <[EMAIL PROTECTED]> wrote: > > > > > > > > Hello all, > > > > > > > > How can we specify irregular depth values using WCS spec? > > > > E.g.(in metres) 5,30, 50, 100, 200, 400 > > > > > > > > Cheers, > > > > > > > > adit > > ------------------------------------------------------------------------- > > Using Tomcat but need to do more? Need to support web services, security? > > Get stuff done quickly with pre-integrated technology to make your job > > easier > > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > > > > _______________________________________________ > > Geotools-devel mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/geotools-devel > > > > > > > > > -- > ------------------------------------------------------- > Eng. Simone Giannecchini > President /CEO GeoSolutions > > http://www.geo-solutions.it > > ------------------------------------------------------- > > -- ------------------------------------------------------- Eng. Simone Giannecchini President /CEO GeoSolutions http://www.geo-solutions.it ------------------------------------------------------- ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Geotools-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-devel
