diff --git a/actions/actionint.h b/actions/actionint.h
new file mode 100644
index 0000000..ccca732
--- /dev/null
+++ b/actions/actionint.h
@@ -0,0 +1,210 @@
+#pragma once
+#include "BFileR.h"
+#include "BFileW.h"
+#include "actiondep.h"
+#include "interpolation.h"
+#include "ncfilew.h"
+#include "ncfuncs.h"
+#include <memory>
+
+template<class T>
+concept ReadIsInterpolable = requires {
+ {
+  std::declval<ReadType<T>>().GridPos(0.0, 0.0)
+ } -> std::convertible_to<struct GridPoint>;
+};
+
+ADD_ACTION(INT, int, (ReadPSupported<Source> || ReadSupported<Source>)&&ReadIsInterpolable<Source>);
+
+template<class D> MString ActionINT::DoAction(const CLArgs& args, D& ds)
+{
+ struct TPoint
+ {
+  struct Point2D p;
+  MDateTime      t;
+  real           lon0, lat0, dtime;
+ };
+
+ MDateTime refdate("1980-01-01");
+
+ if(!args.contains("input")) return "No input file given";
+ michlib::BFileR in;
+ if(in.Open(args.at("input")) != ERR_NOERR) return "Can't open input file " + args.at("input");
+ std::vector<TPoint> points;
+ struct Region       reg;
+
+ {
+  michlib::uint loncol = in.Columns(), latcol = in.Columns(), timecol = in.Columns();
+  michlib::uint lon0col = in.Columns(), lat0col = in.Columns(), dtimecol = in.Columns();
+  for(uint i = 0; i < in.Columns(); i++)
+  {
+   if(in.ColumnName(i + 1) == "lon") loncol = i;
+   if(in.ColumnName(i + 1) == "lat") latcol = i;
+   if(in.ColumnName(i + 1) == "rtime") timecol = i;
+   if(in.ColumnName(i + 1) == "lon0") lon0col = i;
+   if(in.ColumnName(i + 1) == "lat0") lat0col = i;
+   if(in.ColumnName(i + 1) == "time") dtimecol = i;
+  }
+  if(loncol >= in.Columns()) return "Lon column not found in input file " + args.at("input");
+  if(latcol >= in.Columns()) return "Lat column not found in input file " + args.at("input");
+  if(timecol >= in.Columns()) return "Time column not found in input file " + args.at("input");
+  if(lon0col >= in.Columns()) return "Lon0 column not found in input file " + args.at("input");
+  if(lat0col >= in.Columns()) return "Lat0 column not found in input file " + args.at("input");
+  if(dtimecol >= in.Columns()) return "Age column not found in input file " + args.at("input");
+
+  points.resize(in.Rows());
+  reg.lonb = reg.lone = in[loncol][0];
+  reg.latb = reg.late = in[latcol][0];
+  for(uint i = 0; i < in.Rows(); i++)
+  {
+   points[i].p.x   = in[loncol][i];
+   points[i].p.y   = in[latcol][i];
+   points[i].t     = refdate + static_cast<time_t>(michlib::Round(in[timecol][i] * 86400));
+   points[i].lon0  = in[lon0col][i];
+   points[i].lat0  = in[lat0col][i];
+   points[i].dtime = in[dtimecol][i];
+
+   reg.lonb = std::min(reg.lonb, points[i].p.x);
+   reg.lone = std::max(reg.lone, points[i].p.x);
+   reg.latb = std::min(reg.latb, points[i].p.y);
+   reg.late = std::max(reg.late, points[i].p.y);
+  }
+  std::ranges::sort(points, {}, &TPoint::t);
+ }
+ in.Close();
+
+ auto resop = ds.Open(args);
+ if(resop.Exist()) return "Can't open source: " + resop;
+
+ michlib_internal::ParameterListEx pars;
+ pars.UsePrefix("");
+ pars.SetParameter("source", args.at("source"));
+ pars.SetParameter("history", args.at("_cmdline"));
+
+ MString varstring;
+ if(args.contains("var"))
+  varstring = args.at("var");
+ else
+ {
+  if(args.contains("vars"))
+   varstring = args.at("vars");
+  else
+  {
+   if constexpr(HasDefVars<D>)
+    varstring = ds.DefaultVars();
+   else
+    return "Variables not specified";
+  }
+ }
+
+ auto                 vlist = michlib::Split_on_words(varstring, " ,", false);
+ std::vector<MString> vnames{std::make_move_iterator(std::begin(vlist)), std::make_move_iterator(std::end(vlist))};
+ {
+  std::set<MString> used;
+  for(const auto& vname: vnames)
+  {
+   if(used.contains(vname)) return "Duplicate variable " + vname + " in list " + varstring;
+   if(ds.CheckVar(vname) == VarPresence::NONE) return "Variable " + vname + " not exists in this dataset";
+   used.insert(vname);
+  }
+ }
+
+ pars.SetParameter("variables", varstring);
+
+ //int compress = 3;
+ //if(args.contains("compress")) compress = args.at("compress").ToInt();
+
+ std::unique_ptr<const BaseParameters> sourcepars;
+ if constexpr(ParametersSupported<D>)
+ {
+  if constexpr(ParametersRequiredRegion<D>)
+  {
+   auto [p, err] = ds.Parameters(pars, args, reg);
+   if(err.Exist()) return err;
+   sourcepars.reset(p);
+  }
+  else
+  {
+   auto [p, err] = ds.Parameters(pars, args);
+   if(err.Exist()) return err;
+   sourcepars.reset(p);
+  }
+ }
+ auto p = sourcepars.get();
+
+ MString name = args.contains("out") ? args.at("out") : "out.bin";
+ //MString outfmt = args.contains("format") ? args.at("format") : (GetExt(name) == "nc" ? "nc" : "bin");
+
+ size_t          loind = ds.NTimes(), hiind = ds.NTimes(), curind = 0;
+ michlib::BFileW fw;
+ const MDateTime first = ds.Time(0), last = ds.Time(ds.NTimes() - 1);
+
+ std::vector<LinearInterpolator<ReadType<D>>> lo, hi;
+
+ {
+  size_t ic = 0;
+  fw.Create(name, 6 + vnames.size());
+  fw.SetColumnName(++ic, "lon0");
+  fw.SetColumnName(++ic, "lat0");
+  fw.SetColumnName(++ic, "lon");
+  fw.SetColumnName(++ic, "lat");
+  fw.SetColumnName(++ic, "time");
+  fw.SetColumnName(++ic, "rtime");
+  for(size_t i = 0; i < vnames.size(); i++) fw.SetColumnName(++ic, vnames[i]);
+  fw.SetParameters(pars);
+ }
+
+ for(size_t i = 0; i < points.size(); i++)
+ {
+  if(points[i].t < first || points[i].t > last) continue;
+  while(!(points[i].t >= ds.Time(curind) && points[i].t <= ds.Time(curind + 1))) curind++;
+  if(curind != loind && curind != hiind)
+  {
+   loind = curind;
+   hiind = curind + 1;
+   {
+    auto temp = Read(ds, vnames, p, loind);
+    if(temp.size() != vnames.size()) return "Can't read data";
+    //lo.resize(temp.size());
+    for(size_t j = 0; j < temp.size(); j++) lo.emplace_back(std::move(temp[j]));
+   }
+   {
+    auto temp = Read(ds, vnames, p, hiind);
+    if(temp.size() != vnames.size()) return "Can't read data";
+    //hi.resize(temp.size());
+    for(size_t j = 0; j < temp.size(); j++) hi.emplace_back(std::move(temp[j]));
+   }
+  }
+  else if(curind == hiind)
+  {
+   loind = curind;
+   hiind = curind + 1;
+   lo    = std::move(hi);
+   {
+    auto temp = Read(ds, vnames, p, hiind);
+    if(temp.size() != vnames.size()) return "Can't read data";
+    //hi.resize(temp.size());
+    for(size_t j = 0; j < temp.size(); j++) hi.emplace_back(std::move(temp[j]));
+   }
+  }
+  auto step  = ds.Time(hiind) - ds.Time(loind);
+  auto delta = points[i].t - ds.Time(loind);
+  real trel  = static_cast<real>(delta) / static_cast<real>(step);
+
+  fw.Write(points[i].lon0);
+  fw.Write(points[i].lat0);
+  fw.Write(points[i].p.x);
+  fw.Write(points[i].p.y);
+  fw.Write(points[i].dtime);
+  fw.Write(DeltaDates(refdate, points[i].t));
+  for(size_t iv = 0; iv < lo.size(); iv++)
+  {
+   real vlo = lo[iv](points[i].p);
+   real vhi = hi[iv](points[i].p);
+   fw.Write(vlo + (vhi - vlo) * trel);
+  }
+ }
+ fw.Finalize();
+ fw.Close();
+ return "";
+};
diff --git a/include/basedata.h b/include/basedata.h
index 5b8948b..38c3e98 100644
--- a/include/basedata.h
+++ b/include/basedata.h
@@ -15,6 +15,19 @@ struct Region
  real lonb, lone, latb, late;
 };
 
+struct GridPoint
+{
+ size_t ix = 0, iy = 0;
+ real   x = -1.0, y = -1.0;
+
+ bool Valid() const { return x >= 0.0 && y >= 0.0; }
+};
+
+struct Point2D
+{
+ real x, y;
+};
+
 enum class VarPresence
 {
  NONE,
diff --git a/include/interpolation.h b/include/interpolation.h
new file mode 100644
index 0000000..c544925
--- /dev/null
+++ b/include/interpolation.h
@@ -0,0 +1,51 @@
+#pragma once
+#include "basedata.h"
+#include "comdefs.h"
+
+using michlib::real;
+
+template<class D> class LinearInterpolator: public D
+{
+ public:
+ LinearInterpolator(D&& d): D(std::move(d)) {}
+
+ real operator()(const struct Point2D& in) const
+ {
+  const auto gp = D::GridPos(in.x, in.y);
+  if(!gp.Valid()) return NAN;
+
+  if(gp.x == 0.0 && gp.y == 0.0) return D::V(gp.ix, gp.iy);
+
+  real   v00;
+  real   v10;
+  real   v01;
+  real   v11;
+  bool   isfill = false;
+  size_t fx, fy;
+
+  // Count fills
+  for(size_t ix = 0; ix <= 1; ix++)
+   for(size_t iy = 0; iy <= 1; iy++)
+   {
+    if(isfill && D::IsFill(gp.ix + ix, gp.iy + iy)) return NAN;
+    if(D::IsFill(gp.ix + ix, gp.iy + iy))
+    {
+     fx     = ix;
+     fy     = iy;
+     isfill = true;
+    }
+   }
+
+  v00 = D::V(gp.ix, gp.iy);
+  v10 = D::V(gp.ix + 1, gp.iy);
+  v01 = D::V(gp.ix, gp.iy + 1);
+  v11 = D::V(gp.ix + 1, gp.iy + 1);
+
+  if(isfill && fx == 0 && fy == 0) v00 = (v10 + v01 + v11) / 3.0;
+  if(isfill && fx == 1 && fy == 0) v10 = (v00 + v01 + v11) / 3.0;
+  if(isfill && fx == 0 && fy == 1) v01 = (v10 + v00 + v11) / 3.0;
+  if(isfill && fx == 1 && fy == 1) v11 = (v10 + v01 + v00) / 3.0;
+
+  return v00 + gp.y * (v01 - v00) + gp.x * ((v10 - v00) + gp.y * (v00 - v01 + v11 - v10));
+ };
+};
diff --git a/include/simple2ddata.h b/include/simple2ddata.h
index 9347ec4..b4d33f2 100644
--- a/include/simple2ddata.h
+++ b/include/simple2ddata.h
@@ -42,6 +42,23 @@ class Simple2DData: public BaseData
 
  real XStep() const { return xstep; }
  real YStep() const { return ystep; }
+
+ struct GridPoint GridPos(real x, real y) const
+ {
+  struct GridPoint out;
+
+  if(!*this) return out;
+  if(x < x0 || x > x0 + (nx - 1) * xstep || y < y0 || y > y0 + (ny - 1) * ystep) return out;
+
+  real rx = x - x0;
+  real ry = y - y0;
+  out.ix  = static_cast<decltype(out.ix)>(michlib::Floor(rx / xstep));
+  out.iy  = static_cast<decltype(out.ix)>(michlib::Floor(ry / ystep));
+  out.x   = rx - out.ix * xstep;
+  out.y   = ry - out.iy * ystep;
+
+  return out;
+ }
 };
 
 class Rect2DData: public BaseData