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All the GIS area is very new to me so I would like to ask about a guidance of my next steps.


This is the web-map I would like to make (if it is possible):

Lets consider the following map:

EGNOS Computation points.

Each cross represents spatial data in form of point. A number between 1-100 is associated to each point. Any other given point on the map is situated inside an imaginary square defined by the 4 closest spatial data points. For that given point, I would like to display a value witch is computed by linear interpolation of the 4 values of the square corners.

So I would like to show for example:

lat: 43.9 deg; long: 18.1 deg, approx. value: 35.5%

map with feature

Is it possible to create such map? At which layer I should define the interpolation algorithm?

  • Any particular software that you are using? – Martin Dec 9 '13 at 15:12
  • @Martin - I recently got familiar with PostGIS, GeoServer and GeoExplorer. The Desktop GIS is QGIS. – MasterPJ Dec 9 '13 at 15:38

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