diff --git a/sources/VYLET.cpp b/sources/VYLET.cpp
new file mode 100644
index 0000000..2d4e5b6
--- /dev/null
+++ b/sources/VYLET.cpp
@@ -0,0 +1,526 @@
+#define MICHLIB_NOSOURCE
+#include "VYLET.h"
+
+MString VYLETData::Info() const
+{
+ if(!vylet) return "";
+ MString                 out;
+ michlib::CompiledParser xy2lon, xy2lat;
+ real                    x, y;
+ michlib::ParserVars     pv;
+
+ pv["x"] = &x;
+ pv["y"] = &y;
+
+ vylet->UsePrefix("Datafile_Info");
+ MString xy2lonstr = vylet->ParameterSValue("xy2lon", "%y");
+ MString xy2latstr = vylet->ParameterSValue("xy2lat", "%x");
+ ArifmeticCompiler(xy2lonstr, xy2lon, &pv);
+ ArifmeticCompiler(xy2latstr, xy2lat, &pv);
+
+ real lonb, latb, lone, late;
+
+ vylet->UsePrefix("");
+ x = vylet->ParameterRValue("x0", 0.0);
+ y = vylet->ParameterRValue("y0", 0.0);
+ xy2lon.Run(lonb);
+ xy2lat.Run(latb);
+ x = vylet->ParameterRValue("x1", 0.0);
+ y = vylet->ParameterRValue("y1", 0.0);
+ xy2lon.Run(lone);
+ xy2lat.Run(late);
+
+ out += "Start time: " + start.ToString() + "\n";
+ out += "End time: " + end.ToString() + " " + (invtime ? "(backward integration)" : "(forward integration)") + "\n";
+ out += "Region: (" + MString(lonb) + " : " + lone + ") x (" + latb + " : " + late + ")\n";
+ out += "Grid:" + MString(" ") + lons.size() + "x" + lats.size() + "\n";
+ out += HasCoast() ? "Coast: checked\n" : "Coast: not checked\n";
+ out += LengthFast() ? "Trajectory length: fast calculation\n" : "Trajectory length: exact calculation\n";
+
+ out += "Borders: ";
+ bool needcomma = false;
+ if(Left() >= 0.0)
+ {
+  real lon;
+  if(needcomma) out += ", ";
+  out += "left=";
+  x = Left();
+  xy2lon.Run(lon);
+  out += lon;
+  needcomma = true;
+ }
+ if(Right() <= maxx)
+ {
+  real lon;
+  if(needcomma) out += ", ";
+  out += "right=";
+  x = Right();
+  xy2lon.Run(lon);
+  out += lon;
+  needcomma = true;
+ }
+ if(Down() >= 0.0)
+ {
+  real lat;
+  if(needcomma) out += ", ";
+  out += "bottom=";
+  y = Down();
+  xy2lat.Run(lat);
+  out += lat;
+  needcomma = true;
+ }
+ if(Up() <= maxy)
+ {
+  real lat;
+  if(needcomma) out += ", ";
+  out += "bottom=";
+  y = Up();
+  xy2lat.Run(lat);
+  out += lat;
+  needcomma = true;
+ }
+ if(!needcomma) out += "no";
+ out += "\n";
+
+ MString vars = "vylD";
+ if(HasLyap()) vars += ", vylL";
+ if(HasTime()) vars += ", vylT";
+ vars += ", vylNx, vylNy, vylRx, vylRy, vylEx, vylEy, vylPhip, vylPhim, vylPhit";
+ if(HasLyap()) vars += ", vyldS";
+ vars += ", vylAngle, vylLen";
+ if(HasTime()) vars += ", vylTmask";
+
+ out += "Supported variables: " + vars + "\n";
+
+ return out;
+}
+
+MString VYLETData::Open(const CLArgs& args)
+{
+ if(!args.contains("dataset")) return "path to data not specified";
+ MString         dataset = args.at("dataset");
+ decltype(vylet) nvylet;
+
+ michlib::RegExpSimple havex("%x"), havey("%y");
+
+ nvylet.reset(new michlib::BFileR);
+ if(nvylet->Open(dataset) != ERR_NOERR) return "Can't open file " + dataset;
+
+ nvylet->UsePrefix("ProgramInfo");
+ if(nvylet->ParameterSValue("Task", "") != "AdvInt:Vylet") return "File " + dataset + " is not vylet file";
+
+ nvylet->UsePrefix("");
+ if(nvylet->ParameterSValue("nettype", "") != "SQUARE") return "File " + dataset + " have unsupported net type";
+ MString method = nvylet->ParameterSValue("Method", "");
+ if(!(method == "Bicubic" || method == "BicubicL" || method == "BicubicI" || method == "BicubicIL")) return "File " + dataset + " have unsupported integration method";
+ invtime = (method == "BicubicI" || method == "BicubicIL");
+
+ nvylet->UsePrefix("Datafile_Info");
+ MString xy2lonstr = nvylet->ParameterSValue("xy2lon", "%y");
+ MString xy2latstr = nvylet->ParameterSValue("xy2lat", "%x");
+ if(havey.Match(xy2lonstr.Buf()) || havex.Match(xy2latstr.Buf())) return "File " + dataset + " have unsupported grid";
+ auto res = ref.FromString(nvylet->ParameterSValue(invtime ? "EndDate" : "BeginDate", ""));
+ if(!res) return "Can't read reference time";
+
+ nvylet->UsePrefix("");
+ start = R2Time(nvylet->ParameterRValue("tbeg", 0.0));
+ end   = R2Time(nvylet->ParameterRValue("tmax", 0.0));
+
+ nvylet->UsePrefix("Datafile");
+ auto dx = nvylet->ParameterRValue("dx", 0.0);
+ auto dy = nvylet->ParameterRValue("dy", 0.0);
+ auto nx = nvylet->ParameterUValue("nx", 0);
+ auto ny = nvylet->ParameterUValue("ny", 0);
+ maxx    = dx * (nx - 1);
+ maxy    = dy * (ny - 1);
+
+ michlib::CompiledParser xy2lon, xy2lat;
+ real                    x, y;
+ michlib::ParserVars     pv;
+
+ pv["x"] = &x;
+ pv["y"] = &y;
+
+ ArifmeticCompiler(xy2lonstr, xy2lon, &pv);
+ ArifmeticCompiler(xy2latstr, xy2lat, &pv);
+
+ nvylet->UsePrefix("");
+ auto nlon = nvylet->ParameterUValue("Nx", 0) + 1;
+ auto nlat = nvylet->ParameterUValue("Ny", 0) + 1;
+ lons.resize(nlon);
+ lats.resize(nlat);
+
+ elon.resize(nlon * nlat);
+ elat.resize(nlon * nlat);
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++)
+  {
+   x = (*nvylet)[2][iy * lons.size() + ix];
+   y = (*nvylet)[3][iy * lons.size() + ix];
+   xy2lon.Run(elon[iy * lons.size() + ix]);
+   xy2lat.Run(elat[iy * lons.size() + ix]);
+  }
+
+ for(size_t ix = 0; ix < nlon; ix++)
+ {
+  x = (*nvylet)[0][ix];
+  y = (*nvylet)[1][ix];
+  xy2lon.Run(lons[ix]);
+ }
+
+ for(size_t iy = 0; iy < nlat; iy++)
+ {
+  x = (*nvylet)[0][iy * nlon];
+  y = (*nvylet)[1][iy * nlon];
+  xy2lat.Run(lats[iy]);
+ }
+
+ vylet = std::move(nvylet);
+ return "";
+}
+
+bool VYLETData::Read(const MString& vname, std::map<MString, VYLETData::Data>& cache, size_t tind) const
+{
+ if(tind != 0) return false;
+ if(cache.contains(vname)) return true;
+ Data out;
+
+ if(vname == "vylD") out = ReadD();
+ if(vname == "vylL") out = ReadL();
+ if(vname == "vylT") out = ReadT();
+ if(vname == "vylNx") out = ReadNx();
+ if(vname == "vylNy") out = ReadNy();
+ if(vname == "vylRx") out = ReadRx();
+ if(vname == "vylRy") out = ReadRy();
+ if(vname == "vylEx") out = ReadEx();
+ if(vname == "vylEy") out = ReadEy();
+ if(vname == "vylPhip") out = ReadPhip();
+ if(vname == "vylPhim") out = ReadPhim();
+ if(vname == "vylPhit") out = ReadPhit();
+ if(vname == "vyldS") out = ReaddS();
+ if(vname == "vylAngle") out = ReadAngle();
+ if(vname == "vylLen") out = ReadLen();
+ if(vname == "vylTmask") out = ReadTmask();
+
+ if(!out) return false;
+ cache[vname] = std::move(out);
+ return true;
+}
+
+VYLETData::Data VYLETData::ReadD() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ const real xl = Left();
+ const real xr = Right();
+ const real yd = Down();
+ const real yu = Up();
+
+ real x, y;
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++)
+  {
+   out(ix, iy) = 0.0;
+   x           = (*vylet)[2][iy * lons.size() + ix];
+   y           = (*vylet)[3][iy * lons.size() + ix];
+   if(yd > 0.0 && y < yd) out(ix, iy) = -1.0;
+   if(xl > 0.0 && x < xl) out(ix, iy) = -2.0;
+   if(yu < maxy && y > yu) out(ix, iy) = -3.0;
+   if(xr < maxx && x > xr) out(ix, iy) = -4.0;
+   if(out(ix, iy) >= 0.0)
+    out(ix, iy) = 6371.0 * michlib::GCD(M_PI * lons[ix] / 180.0, M_PI * lats[iy] / 180.0, M_PI * elon[iy * lons.size() + ix] / 180.0, M_PI * elat[iy * lons.size() + ix] / 180.0);
+  }
+
+ out.SetUnit("km");
+ out.SetLongName("Distance between start and end points");
+ out.SetComment("Special values: -1.0 - trajectory leave region via south border, -2.0 - trajectory leave region via west border, -3.0 - trajectory leave region via north border, "
+                "-4.0 - trajectory leave region via east border");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadL() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto lcol = Name2ColNum("Log(G.sigma1)");
+ auto tcol = Name2ColNum("time");
+ if(lcol == 0 || tcol == 0) return Data();
+
+ MDateTime time;
+ real      lambda, days;
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++)
+  {
+   time        = R2Time((*vylet)[tcol - 1][iy * lons.size() + ix]);
+   lambda      = (*vylet)[lcol - 1][iy * lons.size() + ix];
+   days        = static_cast<real>(time - start) / MDateTime::secondsperday;
+   out(ix, iy) = lambda / days;
+  }
+
+ out.SetUnit("days-1");
+ out.SetLongName("Lyapunov exponent");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadT() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto tcol = Name2ColNum("time");
+ if(tcol == 0) return Data();
+
+ const real xl = Left();
+ const real xr = Right();
+ const real yd = Down();
+ const real yu = Up();
+
+ vylet->UsePrefix("");
+ const real acc   = vylet->ParameterRValue("accuracy", 1.0);
+ const real tstep = 2.0 * M_PI * 1000.0 / acc;
+
+ const real maxdays = static_cast<real>(end - start) / MDateTime::secondsperday;
+
+ MDateTime time;
+ real      days;
+ real      x, y;
+ bool      inside, maxtime;
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++)
+  {
+   x    = (*vylet)[2][iy * lons.size() + ix];
+   y    = (*vylet)[3][iy * lons.size() + ix];
+   time = R2Time((*vylet)[tcol - 1][iy * lons.size() + ix]);
+   days = static_cast<real>(time - start) / MDateTime::secondsperday;
+   if(days <= tstep * 1.5) days = 0.0;
+   inside  = x > xl && x < xr && y > yd && y < yu;
+   maxtime = days >= maxdays - tstep * 0.5;
+   if(maxtime) days = maxdays;
+   if(inside && !maxtime) days = -days;
+   out(ix, iy) = days;
+  }
+
+ out.SetUnit("days");
+ out.SetLongName("Time to reach border or coast");
+ out.SetComment("Special values: 0.0 - initial point on the land, " + MString(maxdays) + " - trajectory don't reach border, negative values - trajectory beached on the coast");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadNx() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto ncol = Name2ColNum("nx=0");
+ if(ncol == 0) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = (*vylet)[ncol - 1][iy * lons.size() + ix];
+
+ out.SetLongName("Number of moments u=0");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadNy() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto ncol = Name2ColNum("ny=0");
+ if(ncol == 0) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = (*vylet)[ncol - 1][iy * lons.size() + ix];
+
+ out.SetLongName("Number of moments v=0");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadRx() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = elon[iy * lons.size() + ix] - lons[ix];
+
+ out.SetLongName("Displacement in zonal direction");
+
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadRy() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = elat[iy * lons.size() + ix] - lats[iy];
+
+ out.SetLongName("Displacement in meridional direction");
+
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadEx() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = elon[iy * lons.size() + ix];
+
+ out.SetLongName("Final longitude");
+
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadEy() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = elat[iy * lons.size() + ix];
+
+ out.SetLongName("Final latitude");
+
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadPhip() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto ncol = Name2ColNum("nphip");
+ if(ncol == 0) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = (*vylet)[ncol - 1][iy * lons.size() + ix];
+
+ out.SetLongName("Number of counterclockwise rotations");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadPhim() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto ncol = Name2ColNum("nphim");
+ if(ncol == 0) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = (*vylet)[ncol - 1][iy * lons.size() + ix];
+
+ out.SetLongName("Number of clockwise rotations");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadPhit() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto pcol = Name2ColNum("nphip");
+ auto mcol = Name2ColNum("nphim");
+ if(pcol == 0 || mcol == 0) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = (*vylet)[pcol - 1][iy * lons.size() + ix] - (*vylet)[mcol - 1][iy * lons.size() + ix];
+
+ out.SetLongName("Difference between the number of rotations counterclockwise and clockwise");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReaddS() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto l1col = Name2ColNum("Log(G.sigma1)");
+ auto l2col = Name2ColNum("Log(G.sigma2)");
+ if(l1col == 0 || l2col == 0) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = (*vylet)[l1col - 1][iy * lons.size() + ix] + (*vylet)[l2col - 1][iy * lons.size() + ix];
+
+ out.SetLongName("Logarithm of area change multiplier");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadAngle() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto ncol = Name2ColNum("angle");
+ if(ncol == 0) return Data();
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = (*vylet)[ncol - 1][iy * lons.size() + ix] / (2.0 * M_PI);
+
+ out.SetLongName("Total rotation angle normalized to 2π");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadLen() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto ncol = Name2ColNum("length");
+ if(ncol == 0) return Data();
+ bool sisangle = !LengthFast();
+ real mul      = sisangle ? (6371.0 * M_PI / (60.0 * 180.0)) : 1.0;
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++) out(ix, iy) = mul * (*vylet)[ncol - 1][iy * lons.size() + ix];
+
+ if(sisangle)
+ {
+  out.SetUnit("km");
+  out.SetLongName("Trajectory length");
+ }
+ out.SetLongName("Trajectory length (in abstract units)");
+ return out;
+}
+
+VYLETData::Data VYLETData::ReadTmask() const
+{
+ Data out(lons, lats);
+ if(!vylet) return Data();
+
+ auto tcol = Name2ColNum("time");
+ if(tcol == 0) return Data();
+
+ vylet->UsePrefix("");
+ const real acc   = vylet->ParameterRValue("accuracy", 1.0);
+ const real tstep = 2.0 * M_PI * 1000.0 / acc;
+
+ const real maxdays = static_cast<real>(end - start) / MDateTime::secondsperday;
+
+ MDateTime time;
+ real      days;
+ bool      maxtime;
+
+ for(size_t iy = 0; iy < lats.size(); iy++)
+  for(size_t ix = 0; ix < lons.size(); ix++)
+  {
+   time        = R2Time((*vylet)[tcol - 1][iy * lons.size() + ix]);
+   days        = static_cast<real>(time - start) / MDateTime::secondsperday;
+   maxtime     = days >= maxdays - tstep * 0.5;
+   out(ix, iy) = maxtime ? 1.0 : NAN;
+  }
+
+ out.SetLongName("Flag");
+ out.SetComment("Values: 1.0 - the trajectory did not reach either the coast or the borders, NaN - overwise");
+ return out;
+}
diff --git a/sources/VYLET.h b/sources/VYLET.h
new file mode 100644
index 0000000..9c9089a
--- /dev/null
+++ b/sources/VYLET.h
@@ -0,0 +1,145 @@
+#pragma once
+#include "BFileR.h"
+#include "ParseArgs.h"
+#include "mdatetime.h"
+#include "mregex.h"
+#include "simple2ddata.h"
+#include <memory>
+#include <set>
+
+using michlib::M_PI;
+using michlib::MDateTime;
+using michlib::real;
+using michlib::Round;
+
+class VYLETData
+{
+ std::unique_ptr<michlib::BFileR> vylet;
+ MDateTime                        start, end, ref;
+ bool                             invtime;
+ real                             maxx, maxy;
+ std::vector<real>                lons, lats;
+ std::vector<real>                elon, elat;
+
+ MDateTime R2Time(real r) const
+ {
+  auto sec = static_cast<time_t>(Round(r * MDateTime::secondsperday));
+  return ref + (invtime ? -sec : sec);
+ };
+
+ public:
+ using Data = Rect2DData;
+
+ private:
+ auto Name2ColNum(const MString& name) const
+ {
+  auto         nc = vylet->Columns();
+  decltype(nc) i;
+  for(i = 1; i <= nc; i++)
+   if(vylet->ColumnName(i) == name) return i;
+  i = 0;
+  return i;
+ }
+
+ Data ReadD() const;
+ Data ReadL() const;
+ Data ReadT() const;
+ Data ReadNx() const;
+ Data ReadNy() const;
+ Data ReadRx() const;
+ Data ReadRy() const;
+ Data ReadEx() const;
+ Data ReadEy() const;
+ Data ReadPhip() const;
+ Data ReadPhim() const;
+ Data ReadPhit() const;
+ Data ReaddS() const;
+ Data ReadAngle() const;
+ Data ReadLen() const;
+ Data ReadTmask() const;
+
+ public:
+ static constexpr const char* name = "VYLET";
+
+ static constexpr const char* disabledactions = "genintfile uv";
+
+ MString DefaultVars() const
+ {
+  MString vars = "vylD,vylRx,vylRy,vylEx,vylEy,vylAngle,vylLen";
+  if(HasLyap()) vars += ",vylL";
+  if(HasTime()) vars += ",vylT";
+  return vars;
+ }
+
+ bool CheckVar(const MString& vname) const
+ {
+  std::set<MString> vars{"vylD", "vylNx", "vylNy", "vylRx", "vylRy", "vylEx", "vylEy", "vylPhip", "vylPhim", "vylPhit", "vylAngle", "vylLen"};
+  if(HasLyap()) vars.insert("vylL");
+  if(HasLyap()) vars.insert("vyldS");
+  if(HasTime()) vars.insert("vylT");
+  if(HasTime()) vars.insert("vylTmask");
+  return vars.contains(vname);
+ }
+
+ bool Read(const MString& vname, std::map<MString, Data>& cache, size_t tind) const;
+
+ size_t NTimes() const { return vylet ? 1 : 0; }
+
+ MDateTime Time(size_t i) const
+ {
+  if(i == 0 && vylet) return start;
+  return MDateTime();
+ }
+
+ bool HasLyap() const
+ {
+  if(!vylet) return false;
+  vylet->UsePrefix("");
+  MString method = vylet->ParameterSValue("Method", "");
+  return method == "BicubicL" || method == "BicubicIL";
+ }
+
+ bool HasCoast() const
+ {
+  if(!vylet) return false;
+  vylet->UsePrefix("");
+  return vylet->ParameterBValue("checkcoast", true);
+ }
+
+ real Left() const
+ {
+  vylet->UsePrefix("");
+  return vylet->ParameterRValue("xl", -1.0);
+ }
+
+ real Right() const
+ {
+  vylet->UsePrefix("");
+  return vylet->ParameterRValue("xr", maxx + 1.0);
+ }
+
+ real Down() const
+ {
+  vylet->UsePrefix("");
+  return vylet->ParameterRValue("yd", -1.0);
+ }
+
+ real Up() const
+ {
+  vylet->UsePrefix("");
+  return vylet->ParameterRValue("yu", maxy + 1.0);
+ }
+
+ bool HasBorders() const { return Left() >= 0.0 || Right() <= maxx || Down() >= 0.0 || Up() <= maxy; }
+
+ bool HasTime() const { return HasCoast() || HasBorders(); }
+
+ bool LengthFast() const
+ {
+  vylet->UsePrefix("");
+  return !vylet->ParameterBValue("sisangle", false);
+ }
+
+ MString Info() const;
+ MString Open(const CLArgs& args);
+};