Thank you Alexandre for your suggestion: problem solved!
Il Martedì 19 Novembre 2013 16:16, Alexandre Neto <[email protected]> ha
scritto:
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
>>
>>
>>
>>
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>
>
>
>--
>AfLa
>
>
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