How to make interpolated contour plot?

General Usage
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1

I am sorry and I am posting again, I like to make an interpolated contour plot. I have tried and haven’t work. Inverse distance weighting will be preferred interpolation method.
image

my data looks like that

> first(df,5)
> 5×3 DataFrames.DataFrame
> │ Row │ lat      │ lon       │ elevation       │
> │     │ Float64 │ Float64 │ Float64 │
> ├─────┼─────────┼─────────┼─────────┤
> │ 1   │ 26.5068 │ 87.4509 │ 76.2    │
> │ 2   │ 26.4262 │ 87.4618 │ 64.9    │
> │ 3   │ 26.3054 │ 87.478  │ 57.3    │
> │ 4   │ 25.9839 │ 87.521  │ 45.3    │
> │ 5   │ 25.7972 │ 87.5454 │ 40.2    │

I did it in python using scipy (interpolation from scipy). I like to do it in pure Julia.

2

You can do it with GMT.jl. The module in question is nearneighbor

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