Hello giuseppe, You can do it directly on a spreadsheet like libreoffice calc. Get the X and Y coordinates, and elevation from each point, For each point, calculate the distance to the previous point using:
sqrt((x2-x1)^2 + (y2-y1)^2) and in a new column calculate acumulate that value (This is the M column). You can then use the M column and the Z to create a area chart. Hope this helps. Alexandre Neto On Tue, Nov 19, 2013 at 2:57 PM, venerio giuseppe anardu < [email protected]> wrote: > I knew and already used that plugin: I have several points on a surface > and in that case it suits my purposes because I interpolated the vector > points to obtain a DTM raster to use the plugin. > But in this case I'd need a way to accomplish the task directly from > surveyed vector points without interpolating: in other words a profile made > by vector points not by interpolated raster surface. > I've made some esperiments, but interpolate a raster surfece from points > surveyed on a straight line, as I supposed, gave unacceptable results... > > Giuseppe > > > > > Il Martedì 19 Novembre 2013 15:29, Alfonso Flaquer < > [email protected]> ha scritto: > Hi Guiseppe, > In Qgis 1.8 exist a plugin named Profile Tool. This plugin allow you to > create a topographic profile from a raster layer. Maybe you can create a > raster from your vector data. > regards > > Hola Guiseppe, > En Qgis 1.8 existe un plugin llamado "Profile Tool". este plugin permite > realizar un perfil topográfico a partir de un archivo raster. Quizás puedas > obtener un raster de tus datos vectoriales y luego utilizar el plugin. > > Saludos > > > 2013/11/18 venerio giuseppe anardu <[email protected]> > > Hello to everybody, > > I have to make a topographic profile of some vector points surveyed along > a straight line, wich is the best way to do it? > > Many thanks in advance, > Giuseppe > > > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > > > > > -- > AfLa > > > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user >
_______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
