I have a layer of points that represent bus stops. Each point has a value (quality of service, between
100). I need to create a grid (resolution
25m) by interpolating the points values.
For each cell of the grid, I want to assign the value of the best surrounding stop (search radius of
500m), but the values of the stops should decrease linearly with the distance between them and the grid cell (
For example, a grid cell located
100m away from a stop with value
200m away from another stop with value
80 should have the value
80 - 0.2*80). The bus stop with the bad value
30 has no impact on this cell.
I tried IDW interpolation but I'm not getting the result I expect. I'm using QGIS.