4 files changed, 43 insertions, 14 deletions
diff --git a/src/GipfelWidget.H b/src/GipfelWidget.H
index 3dc8503..274ce33 100644
--- a/src/GipfelWidget.H
+++ b/src/GipfelWidget.H
@@ -22,6 +22,7 @@ class GipfelWidget : public Fl_Widget {
 		Fl_Menu_Button *mb;
 		char *img_file;
 		double track_width;
+		int have_gipfel_info;
 		ImageMetaData *md;
 
 		int show_hidden;
diff --git a/src/GipfelWidget.cxx b/src/GipfelWidget.cxx
index 15a3cc6..4ccbfa2 100644
--- a/src/GipfelWidget.cxx
+++ b/src/GipfelWidget.cxx
@@ -50,6 +50,7 @@ GipfelWidget::GipfelWidget(int X,int Y,int W, int H): Fl_Widget(X, Y, W, H) {
 	img_file = NULL;
 	track_width = 200.0;
 	show_hidden = 0;
+	have_gipfel_info = 0;
 	md = new ImageMetaData();
 	track_points = NULL;
 	fl_register_images();
@@ -58,6 +59,7 @@ GipfelWidget::GipfelWidget(int X,int Y,int W, int H): Fl_Widget(X, Y, W, H) {
 int
 GipfelWidget::load_image(char *file) {
 	Fl_Image *new_img;
+	double direction, nick, tilt, fl;
 
 	new_img = new Fl_JPEG_Image(file);
 
@@ -90,11 +92,40 @@ GipfelWidget::load_image(char *file) {
 	set_view_long(md->get_longitude());
 	set_view_lat(md->get_latitude());
 	set_view_height(md->get_height());
-	set_center_angle(md->get_direction());
-	set_nick_angle(md->get_nick());
-	set_tilt_angle(md->get_tilt());
 	set_projection((ProjectionLSQ::Projection_t) md->get_projection_type());
-	set_focal_length_35mm(md->get_focal_length_35mm());
+
+	have_gipfel_info = 1;
+	direction = md->get_direction();
+	if (isnan(direction)) {
+		set_center_angle(0.0);
+		have_gipfel_info = 0;
+	} else {
+		set_center_angle(direction);
+	}
+
+	nick = md->get_nick();
+	if (isnan(nick)) {
+		set_nick_angle(0.0);
+		have_gipfel_info = 0;
+	} else {
+		set_nick_angle(nick);
+	}
+
+	tilt = md->get_tilt();
+	if (isnan(tilt)) {
+		set_tilt_angle(0.0);
+		have_gipfel_info = 0;
+	} else {
+		set_tilt_angle(tilt);
+	}
+
+	fl = md->get_focal_length_35mm();
+	if (isnan(fl)) {
+		set_focal_length_35mm(35.0);
+		have_gipfel_info = 0;
+	} else {
+		set_focal_length_35mm(fl);
+	}
 	
 	// try to get distortion parameters in the following ordering:
 	// 1. gipfel data in JPEG comment
@@ -678,6 +709,10 @@ int
 GipfelWidget::export_hills(FILE *fp) {
 	Hills *mnts;
 
+	if (!have_gipfel_info) {
+		return 0;
+	}
+
 	fprintf(fp, "#\n# name\theight\tx\ty\tdistance\tflags\n#\n");
 
 	mnts = pan->get_visible_mountains();
diff --git a/src/ImageMetaData.H b/src/ImageMetaData.H
index 90b13c9..a305415 100644
--- a/src/ImageMetaData.H
+++ b/src/ImageMetaData.H
@@ -24,6 +24,7 @@ class ImageMetaData {
 		double focal_length_35mm;
 		double scale;
 		int    projection_type;
+		int    have_gipfel_info;
 
 		int load_image_jpgcom(char *name);
 		int save_image_jpgcom(char *in_img, char *out_img);
diff --git a/src/ImageMetaData.cxx b/src/ImageMetaData.cxx
index 2693851..0fa95d4 100644
--- a/src/ImageMetaData.cxx
+++ b/src/ImageMetaData.cxx
@@ -51,20 +51,12 @@ ImageMetaData::clear() {
 
 int
 ImageMetaData::load_image(char *name) {
-	int ret;
-
 	clear();
 
-	ret = load_image_jpgcom(name);
-
+	load_image_jpgcom(name);
 	load_image_exif(name); // fill missing values from exif data
 
-	if (isnan(direction)) direction = 0.0;
-	if (isnan(nick)) nick = 0.0;
-	if (isnan(tilt)) tilt = 0.0;
-	if (isnan(focal_length_35mm)) focal_length_35mm = 35.0;
-
-	return ret;
+	return 0;
 }
 
 int