Make the DEM data borders look much better

src/map/IMG/jls.cpp

@@ -184,7 +184,10 @@ bool JLS::readLine(BitStream &bs)
 			_b[1] = _b[1] + mes;
 			if (_n[1] == 0x40) {
 				_a[1] = _a[1] >> 1;
-				_b[1] = _b[1] >> 1;
+				if (_b[1] >= 0)
+					_b[1] = _b[1] >> 1;
+				else
+					_b[1] = -((1 - _b[1]) >> 1);
 				_n[1] = 0x21;
 			} else {
 				_n[1] = _n[1] + 1;
@@ -273,7 +276,10 @@ bool JLS::readLine(BitStream &bs)
 			_a[ictx] = _a[ictx] + (evh - rctx);
 			if (_n[ictx] == 0x40) {
 				_a[ictx] = _a[ictx] >> 1;
-				_b[ictx] = _b[ictx] >> 1;
+				if (_b[ictx] >= 0)
+					_b[ictx] = _b[ictx] >> 1;
+				else
+					_b[ictx] = -((1 - _b[ictx]) >> 1);
 				_n[ictx] = 0x21;
 			} else
 				_n[ictx] = _n[ictx] + 1;

src/map/filter.cpp

@@ -99,16 +99,31 @@ MatrixD Filter::blur(const MatrixD &m, int radius)
 {
 	MatrixD src(m);
 	MatrixD dst(m.h(), m.w());
+	double sum = 0;
+	int cnt = 0;
 
-	for (int i = 0; i < m.size(); i++)
-		if (std::isnan(m.at(i)))
-			src.at(i) = -500;
+	for (int i = 0; i < m.size(); i++) {
+		if (!std::isnan(m.at(i))) {
+			sum += m.at(i);
+			cnt++;
+		}
+	}
+
+	if (cnt != m.size()) {
+		double avg = sum / cnt;
+
+		for (int i = 0; i < m.size(); i++)
+			if (std::isnan(m.at(i)))
+				src.at(i) = avg;
+	}
 
 	gaussBlur4(src, dst, radius);
 
-	for (int i = 0; i < dst.size(); i++)
-		if (std::isnan(m.at(i)))
-			dst.at(i) = NAN;
+	if (cnt != m.size()) {
+		for (int i = 0; i < dst.size(); i++)
+			if (std::isnan(m.at(i)))
+				dst.at(i) = NAN;
+	}
 
 	return dst;
 }

src/map/gcs.cpp

@@ -223,18 +223,6 @@ bool GCS::loadList(const QString &path)
 	return true;
 }
 
-Coordinates GCS::toWGS84(const Coordinates &c) const
-{
-	return datum().toWGS84(Coordinates(_primeMeridian.toGreenwich(c.lon()),
-	  c.lat()));
-}
-
-Coordinates GCS::fromWGS84(const Coordinates &c) const
-{
-	Coordinates ds(datum().fromWGS84(c));
-	return Coordinates(_primeMeridian.fromGreenwich(ds.lon()), ds.lat());
-}
-
 QList<KV<int, QString> > GCS::list()
 {
 	QList<KV<int, QString> > list;

src/map/gcs.h

@@ -29,8 +29,16 @@ public:
 	bool isValid() const {return _datum.isValid() && _angularUnits.isValid()
 	  && _primeMeridian.isValid();}
 
-	Coordinates toWGS84(const Coordinates &c) const;
-	Coordinates fromWGS84(const Coordinates &c) const;
+	Coordinates toWGS84(const Coordinates &c) const
+	{
+		return datum().toWGS84(Coordinates(_primeMeridian.toGreenwich(c.lon()),
+		  c.lat()));
+	}
+	Coordinates fromWGS84(const Coordinates &c) const
+	{
+		Coordinates ds(datum().fromWGS84(c));
+		return Coordinates(_primeMeridian.fromGreenwich(ds.lon()), ds.lat());
+	}
 
 	static GCS gcs(int id);
 	static GCS gcs(int geodeticDatum, int primeMeridian, int angularUnits);