I am asking a question on the fundamentals not on a particular example on how the value within a raster cell is determined when multiple vector data points are located within a raster cell footprint. I use RST mostly and sometimes IDW for vector data points.
Le dim. 10 mars 2019 à 10:05, Nikos Alexandris <n...@nikosalexandris.net> a écrit : > * Francois Chartier <fra.chart...@gmail.com> [2019-03-10 09:38:13 -0400]: > > >Hi > > > >i was wondering how the value of a pixel is determined when multiple data > >points are located within a pixel, for 2d and 3d pixel. I assume it is > >based on the interpolation methodology of the raster. is this correct. > >for large pixels where only data point is located within it, can the pixel > >have a different value than that of the data point if through the > >interpolation and due to surrounding points it generates a different > value? > >thks > > Dear Francois, > > your questions are a bit sketchy. What exactly are trying to do? > > How the value of a pixel is determined when multiple data points are > located within a pixel? > > Which multiple data points are you referring to? > > Multiple raster data cells, which you get when you modify the > computational region (i.e. when you go from a given spatial resolution > to a coarser one)? > Did you try to resample a raster data set and wonder how the new cell's > value is computed? Which module did you try to use? Which methods? > > Vector data points? Which interpolation module did you try? > > Nikos >
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