Geo lib: Fix code style

src/lib/geo/geo.c

@@ -83,16 +83,19 @@ __EXPORT uint64_t map_projection_timestamp(const struct map_projection_reference
 	return ref->timestamp;
 }
 
-__EXPORT int map_projection_global_init(double lat_0, double lon_0, uint64_t timestamp) //lat_0, lon_0 are expected to be in correct format: -> 47.1234567 and not 471234567
+__EXPORT int map_projection_global_init(double lat_0, double lon_0,
+					uint64_t timestamp) //lat_0, lon_0 are expected to be in correct format: -> 47.1234567 and not 471234567
 {
 	if (strcmp("commander", getprogname()) == 0) {
 		return map_projection_init_timestamped(&mp_ref, lat_0, lon_0, timestamp);
+
 	} else {
 		return -1;
 	}
 }
 
-__EXPORT int map_projection_init_timestamped(struct map_projection_reference_s *ref, double lat_0, double lon_0, uint64_t timestamp) //lat_0, lon_0 are expected to be in correct format: -> 47.1234567 and not 471234567
+__EXPORT int map_projection_init_timestamped(struct map_projection_reference_s *ref, double lat_0, double lon_0,
+		uint64_t timestamp) //lat_0, lon_0 are expected to be in correct format: -> 47.1234567 and not 471234567
 {
 
 	ref->lat_rad = lat_0 * M_DEG_TO_RAD;
@@ -106,7 +109,8 @@ __EXPORT int map_projection_init_timestamped(struct map_projection_reference_s *
 	return 0;
 }
 
-__EXPORT int map_projection_init(struct map_projection_reference_s *ref, double lat_0, double lon_0) //lat_0, lon_0 are expected to be in correct format: -> 47.1234567 and not 471234567
+__EXPORT int map_projection_init(struct map_projection_reference_s *ref, double lat_0,
+				 double lon_0) //lat_0, lon_0 are expected to be in correct format: -> 47.1234567 and not 471234567
 {
 	return map_projection_init_timestamped(ref, lat_0, lon_0, hrt_absolute_time());
 }
@@ -116,7 +120,8 @@ __EXPORT int map_projection_global_reference(double *ref_lat_rad, double *ref_lo
 	return map_projection_reference(&mp_ref, ref_lat_rad, ref_lon_rad);
 }
 
-__EXPORT int map_projection_reference(const struct map_projection_reference_s *ref, double *ref_lat_rad, double *ref_lon_rad)
+__EXPORT int map_projection_reference(const struct map_projection_reference_s *ref, double *ref_lat_rad,
+				      double *ref_lon_rad)
 {
 	if (!map_projection_initialized(ref)) {
 		return -1;
@@ -134,7 +139,8 @@ __EXPORT int map_projection_global_project(double lat, double lon, float *x, flo
 
 }
 
-__EXPORT int map_projection_project(const struct map_projection_reference_s *ref, double lat, double lon, float *x, float *y)
+__EXPORT int map_projection_project(const struct map_projection_reference_s *ref, double lat, double lon, float *x,
+				    float *y)
 {
 	if (!map_projection_initialized(ref)) {
 		return -1;
@@ -161,7 +167,8 @@ __EXPORT int map_projection_global_reproject(float x, float y, double *lat, doub
 	return map_projection_reproject(&mp_ref, x, y, lat, lon);
 }
 
-__EXPORT int map_projection_reproject(const struct map_projection_reference_s *ref, float x, float y, double *lat, double *lon)
+__EXPORT int map_projection_reproject(const struct map_projection_reference_s *ref, float x, float y, double *lat,
+				      double *lon)
 {
 	if (!map_projection_initialized(ref)) {
 		return -1;
@@ -212,14 +219,16 @@ __EXPORT int globallocalconverter_init(double lat_0, double lon_0, float alt_0,
 {
 	if (strcmp("commander", getprogname()) == 0) {
 		gl_ref.alt = alt_0;
-		if (!map_projection_global_init(lat_0, lon_0, timestamp))
-		{
+
+		if (!map_projection_global_init(lat_0, lon_0, timestamp)) {
 			gl_ref.init_done = true;
 			return 0;
+
 		} else {
 			gl_ref.init_done = false;
 			return -1;
 		}
+
 	} else {
 		return -1;
 	}
@@ -260,8 +269,7 @@ __EXPORT int globallocalconverter_getref(double *lat_0, double *lon_0, float *al
 		return -1;
 	}
 
-	if (map_projection_global_getref(lat_0, lon_0))
-	{
+	if (map_projection_global_getref(lat_0, lon_0)) {
 		return -1;
 	}
 
@@ -283,7 +291,8 @@ __EXPORT float get_distance_to_next_waypoint(double lat_now, double lon_now, dou
 	double d_lat = lat_next_rad - lat_now_rad;
 	double d_lon = lon_next_rad - lon_now_rad;
 
-	double a = sin(d_lat / (double)2.0) * sin(d_lat / (double)2.0) + sin(d_lon / (double)2.0) * sin(d_lon / (double)2.0) * cos(lat_now_rad) * cos(lat_next_rad);
+	double a = sin(d_lat / (double)2.0) * sin(d_lat / (double)2.0) + sin(d_lon / (double)2.0) * sin(d_lon /
+			(double)2.0) * cos(lat_now_rad) * cos(lat_next_rad);
 	double c = (double)2.0 * atan2(sqrt(a), sqrt((double)1.0 - a));
 
 	return CONSTANTS_RADIUS_OF_EARTH * c;
@@ -299,14 +308,16 @@ __EXPORT float get_bearing_to_next_waypoint(double lat_now, double lon_now, doub
 	double d_lon = lon_next_rad - lon_now_rad;
 
 	/* conscious mix of double and float trig function to maximize speed and efficiency */
-	float theta = atan2f(sin(d_lon) * cos(lat_next_rad) , cos(lat_now_rad) * sin(lat_next_rad) - sin(lat_now_rad) * cos(lat_next_rad) * cos(d_lon));
+	float theta = atan2f(sin(d_lon) * cos(lat_next_rad) ,
+			     cos(lat_now_rad) * sin(lat_next_rad) - sin(lat_now_rad) * cos(lat_next_rad) * cos(d_lon));
 
 	theta = _wrap_pi(theta);
 
 	return theta;
 }
 
-__EXPORT void get_vector_to_next_waypoint(double lat_now, double lon_now, double lat_next, double lon_next, float *v_n, float *v_e)
+__EXPORT void get_vector_to_next_waypoint(double lat_now, double lon_now, double lat_next, double lon_next, float *v_n,
+		float *v_e)
 {
 	double lat_now_rad = lat_now * M_DEG_TO_RAD;
 	double lon_now_rad = lon_now * M_DEG_TO_RAD;
@@ -316,11 +327,13 @@ __EXPORT void get_vector_to_next_waypoint(double lat_now, double lon_now, double
 	double d_lon = lon_next_rad - lon_now_rad;
 
 	/* conscious mix of double and float trig function to maximize speed and efficiency */
-	*v_n = CONSTANTS_RADIUS_OF_EARTH * (cos(lat_now_rad) * sin(lat_next_rad) - sin(lat_now_rad) * cos(lat_next_rad) * cos(d_lon));
+	*v_n = CONSTANTS_RADIUS_OF_EARTH * (cos(lat_now_rad) * sin(lat_next_rad) - sin(lat_now_rad) * cos(lat_next_rad) * cos(
+			d_lon));
 	*v_e = CONSTANTS_RADIUS_OF_EARTH * sin(d_lon) * cos(lat_next_rad);
 }
 
-__EXPORT void get_vector_to_next_waypoint_fast(double lat_now, double lon_now, double lat_next, double lon_next, float *v_n, float *v_e)
+__EXPORT void get_vector_to_next_waypoint_fast(double lat_now, double lon_now, double lat_next, double lon_next,
+		float *v_n, float *v_e)
 {
 	double lat_now_rad = lat_now * M_DEG_TO_RAD;
 	double lon_now_rad = lon_now * M_DEG_TO_RAD;
@@ -335,7 +348,8 @@ __EXPORT void get_vector_to_next_waypoint_fast(double lat_now, double lon_now, d
 	*v_e = CONSTANTS_RADIUS_OF_EARTH * d_lon * cos(lat_now_rad);
 }
 
-__EXPORT void add_vector_to_global_position(double lat_now, double lon_now, float v_n, float v_e, double *lat_res, double *lon_res)
+__EXPORT void add_vector_to_global_position(double lat_now, double lon_now, float v_n, float v_e, double *lat_res,
+		double *lon_res)
 {
 	double lat_now_rad = lat_now * M_DEG_TO_RAD;
 	double lon_now_rad = lon_now * M_DEG_TO_RAD;
@@ -346,7 +360,8 @@ __EXPORT void add_vector_to_global_position(double lat_now, double lon_now, floa
 
 // Additional functions - @author Doug Weibel <douglas.weibel@colorado.edu>
 
-__EXPORT int get_distance_to_line(struct crosstrack_error_s *crosstrack_error, double lat_now, double lon_now, double lat_start, double lon_start, double lat_end, double lon_end)
+__EXPORT int get_distance_to_line(struct crosstrack_error_s *crosstrack_error, double lat_now, double lon_now,
+				  double lat_start, double lon_start, double lat_end, double lon_end)
 {
 // This function returns the distance to the nearest point on the track line.  Distance is positive if current
 // position is right of the track and negative if left of the track as seen from a point on the track line
@@ -397,7 +412,8 @@ __EXPORT int get_distance_to_line(struct crosstrack_error_s *crosstrack_error, d
 }
 
 
-__EXPORT int get_distance_to_arc(struct crosstrack_error_s *crosstrack_error, double lat_now, double lon_now, double lat_center, double lon_center,
+__EXPORT int get_distance_to_arc(struct crosstrack_error_s *crosstrack_error, double lat_now, double lon_now,
+				 double lat_center, double lon_center,
 				 float radius, float arc_start_bearing, float arc_sweep)
 {
 	// This function returns the distance to the nearest point on the track arc.  Distance is positive if current
@@ -436,10 +452,12 @@ __EXPORT int get_distance_to_arc(struct crosstrack_error_s *crosstrack_error, do
 	in_sector = false;
 
 	// Case where sector does not span zero
-	if (bearing_sector_end >= bearing_sector_start && bearing_now >= bearing_sector_start && bearing_now <= bearing_sector_end) { in_sector = true; }
+	if (bearing_sector_end >= bearing_sector_start && bearing_now >= bearing_sector_start
+	    && bearing_now <= bearing_sector_end) { in_sector = true; }
 
 	// Case where sector does span zero
-	if (bearing_sector_end < bearing_sector_start && (bearing_now > bearing_sector_start || bearing_now < bearing_sector_end)) { in_sector = true; }
+	if (bearing_sector_end < bearing_sector_start && (bearing_now > bearing_sector_start
+			|| bearing_now < bearing_sector_end)) { in_sector = true; }
 
 	// If in the sector then calculate distance and bearing to closest point
 	if (in_sector) {
@@ -479,6 +497,7 @@ __EXPORT int get_distance_to_arc(struct crosstrack_error_s *crosstrack_error, do
 		if (dist_to_start < dist_to_end) {
 			crosstrack_error->distance = dist_to_start;
 			crosstrack_error->bearing = get_bearing_to_next_waypoint(lat_now, lon_now, lat_start, lon_start);
+
 		} else {
 			crosstrack_error->past_end = true;
 			crosstrack_error->distance = dist_to_end;
@@ -539,6 +558,7 @@ __EXPORT float _wrap_pi(float bearing)
 	}
 
 	int c = 0;
+
 	while (bearing >= M_PI_F) {
 		bearing -= M_TWOPI_F;
 
@@ -548,6 +568,7 @@ __EXPORT float _wrap_pi(float bearing)
 	}
 
 	c = 0;
+
 	while (bearing < -M_PI_F) {
 		bearing += M_TWOPI_F;
 
@@ -567,6 +588,7 @@ __EXPORT float _wrap_2pi(float bearing)
 	}
 
 	int c = 0;
+
 	while (bearing >= M_TWOPI_F) {
 		bearing -= M_TWOPI_F;
 
@@ -576,6 +598,7 @@ __EXPORT float _wrap_2pi(float bearing)
 	}
 
 	c = 0;
+
 	while (bearing < 0.0f) {
 		bearing += M_TWOPI_F;
 
@@ -595,6 +618,7 @@ __EXPORT float _wrap_180(float bearing)
 	}
 
 	int c = 0;
+
 	while (bearing >= 180.0f) {
 		bearing -= 360.0f;
 
@@ -604,6 +628,7 @@ __EXPORT float _wrap_180(float bearing)
 	}
 
 	c = 0;
+
 	while (bearing < -180.0f) {
 		bearing += 360.0f;
 
@@ -623,6 +648,7 @@ __EXPORT float _wrap_360(float bearing)
 	}
 
 	int c = 0;
+
 	while (bearing >= 360.0f) {
 		bearing -= 360.0f;
 
@@ -632,6 +658,7 @@ __EXPORT float _wrap_360(float bearing)
 	}
 
 	c = 0;
+
 	while (bearing < 0.0f) {
 		bearing += 360.0f;
 

src/lib/geo/geo.h

@@ -113,7 +113,8 @@ __EXPORT int map_projection_global_reference(double *ref_lat_rad, double *ref_lo
  * Writes the reference values of the projection given by the argument to ref_lat and ref_lon
  * @return 0 if map_projection_init was called before, -1 else
  */
-__EXPORT int map_projection_reference(const struct map_projection_reference_s *ref, double *ref_lat_rad, double *ref_lon_rad);
+__EXPORT int map_projection_reference(const struct map_projection_reference_s *ref, double *ref_lat_rad,
+				      double *ref_lon_rad);
 
 /**
  * Initializes the global map transformation.
@@ -158,15 +159,16 @@ __EXPORT int map_projection_init(struct map_projection_reference_s *ref, double
 __EXPORT int map_projection_global_project(double lat, double lon, float *x, float *y);
 
 
- /* Transforms a point in the geographic coordinate system to the local
-  * azimuthal equidistant plane using the projection given by the argument
- * @param x north
- * @param y east
- * @param lat in degrees (47.1234567°, not 471234567°)
- * @param lon in degrees (8.1234567°, not 81234567°)
- * @return 0 if map_projection_init was called before, -1 else
- */
-__EXPORT int map_projection_project(const struct map_projection_reference_s *ref, double lat, double lon, float *x, float *y);
+/* Transforms a point in the geographic coordinate system to the local
+ * azimuthal equidistant plane using the projection given by the argument
+* @param x north
+* @param y east
+* @param lat in degrees (47.1234567°, not 471234567°)
+* @param lon in degrees (8.1234567°, not 81234567°)
+* @return 0 if map_projection_init was called before, -1 else
+*/
+__EXPORT int map_projection_project(const struct map_projection_reference_s *ref, double lat, double lon, float *x,
+				    float *y);
 
 /**
  * Transforms a point in the local azimuthal equidistant plane to the
@@ -190,7 +192,8 @@ __EXPORT int map_projection_global_reproject(float x, float y, double *lat, doub
  * @param lon in degrees (8.1234567°, not 81234567°)
  * @return 0 if map_projection_init was called before, -1 else
  */
-__EXPORT int map_projection_reproject(const struct map_projection_reference_s *ref, float x, float y, double *lat, double *lon);
+__EXPORT int map_projection_reproject(const struct map_projection_reference_s *ref, float x, float y, double *lat,
+				      double *lon);
 
 /**
  * Get reference position of the global map projection
@@ -243,15 +246,20 @@ __EXPORT float get_distance_to_next_waypoint(double lat_now, double lon_now, dou
  */
 __EXPORT float get_bearing_to_next_waypoint(double lat_now, double lon_now, double lat_next, double lon_next);
 
-__EXPORT void get_vector_to_next_waypoint(double lat_now, double lon_now, double lat_next, double lon_next, float *v_n, float *v_e);
+__EXPORT void get_vector_to_next_waypoint(double lat_now, double lon_now, double lat_next, double lon_next, float *v_n,
+		float *v_e);
 
-__EXPORT void get_vector_to_next_waypoint_fast(double lat_now, double lon_now, double lat_next, double lon_next, float *v_n, float *v_e);
+__EXPORT void get_vector_to_next_waypoint_fast(double lat_now, double lon_now, double lat_next, double lon_next,
+		float *v_n, float *v_e);
 
-__EXPORT void add_vector_to_global_position(double lat_now, double lon_now, float v_n, float v_e, double *lat_res, double *lon_res);
+__EXPORT void add_vector_to_global_position(double lat_now, double lon_now, float v_n, float v_e, double *lat_res,
+		double *lon_res);
 
-__EXPORT int get_distance_to_line(struct crosstrack_error_s *crosstrack_error, double lat_now, double lon_now, double lat_start, double lon_start, double lat_end, double lon_end);
+__EXPORT int get_distance_to_line(struct crosstrack_error_s *crosstrack_error, double lat_now, double lon_now,
+				  double lat_start, double lon_start, double lat_end, double lon_end);
 
-__EXPORT int get_distance_to_arc(struct crosstrack_error_s *crosstrack_error, double lat_now, double lon_now, double lat_center, double lon_center,
+__EXPORT int get_distance_to_arc(struct crosstrack_error_s *crosstrack_error, double lat_now, double lon_now,
+				 double lat_center, double lon_center,
 				 float radius, float arc_start_bearing, float arc_sweep);
 
 /*

src/lib/geo_lookup/geo_mag_declination.c

@@ -35,7 +35,7 @@
 * @file geo_mag_declination.c
 *
 * Calculation / lookup table for earth magnetic field declination.
-* 
+*
 * Lookup table from Scott Ferguson <scottfromscott@gmail.com>
 *
 * XXX Lookup table currently too coarse in resolution (only full degrees)
@@ -55,18 +55,18 @@
 static const int8_t declination_table[13][37] = \
 {
 	{ 46, 45, 44, 42, 41, 40, 38, 36, 33, 28, 23, 16, 10, 4, -1, -5, -9, -14, -19, -26, -33, -40, -48, -55, -61, -66, -71, -74, -75, -72, -61, -25, 22, 40, 45, 47, 46 },
-    { 30, 30, 30, 30, 29, 29, 29, 29, 27, 24, 18, 11, 3, -3, -9, -12, -15, -17, -21, -26, -32, -39, -45, -51, -55, -57, -56, -53, -44, -31, -14, 0, 13, 21, 26, 29, 30 },
-    { 21, 22, 22, 22, 22, 22, 22, 22, 21, 18, 13, 5, -3, -11, -17, -20, -21, -22, -23, -25, -29, -35, -40, -44, -45, -44, -40, -32, -22, -12, -3, 3, 9, 14, 18, 20, 21 },
-    { 16, 17, 17, 17, 17, 17, 16, 16, 16, 13, 8, 0, -9, -16, -21, -24, -25, -25, -23, -20, -21, -24, -28, -31, -31, -29, -24, -17, -9, -3, 0, 4, 7, 10, 13, 15, 16 },
-    { 12, 13, 13, 13, 13, 13, 12, 12, 11, 9, 3, -4, -12, -19, -23, -24, -24, -22, -17, -12, -9, -10, -13, -17, -18, -16, -13, -8, -3, 0, 1, 3, 6, 8, 10, 12, 12 },
-    { 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 0, -6, -14, -20, -22, -22, -19, -15, -10, -6, -2, -2, -4, -7, -8, -8, -7, -4, 0, 1, 1, 2, 4, 6, 8, 10, 10 },
-    { 9, 9, 9, 9, 9, 9, 8, 8, 7, 4, -1, -8, -15, -19, -20, -18, -14, -9, -5, -2, 0, 1, 0, -2, -3, -4, -3, -2, 0, 0, 0, 1, 3, 5, 7, 8, 9 },
-    { 8, 8, 8, 9, 9, 9, 8, 8, 6, 2, -3, -9, -15, -18, -17, -14, -10, -6, -2, 0, 1, 2, 2, 0, -1, -1, -2, -1, 0, 0, 0, 0, 1, 3, 5, 7, 8 },
-    { 8, 9, 9, 10, 10, 10, 10, 8, 5, 0, -5, -11, -15, -16, -15, -12, -8, -4, -1, 0, 2, 3, 2, 1, 0, 0, 0, 0, 0, -1, -2, -2, -1, 0, 3, 6, 8 },
-    { 6, 9, 10, 11, 12, 12, 11, 9, 5, 0, -7, -12, -15, -15, -13, -10, -7, -3, 0, 1, 2, 3, 3, 3, 2, 1, 0, 0, -1, -3, -4, -5, -5, -2, 0, 3, 6 },
-    { 5, 8, 11, 13, 15, 15, 14, 11, 5, -1, -9, -14, -17, -16, -14, -11, -7, -3, 0, 1, 3, 4, 5, 5, 5, 4, 3, 1, -1, -4, -7, -8, -8, -6, -2, 1, 5 },
-    { 4, 8, 12, 15, 17, 18, 16, 12, 5, -3, -12, -18, -20, -19, -16, -13, -8, -4, -1, 1, 4, 6, 8, 9, 9, 9, 7, 3, -1, -6, -10, -12, -11, -9, -5, 0, 4 },
-    { 3, 9, 14, 17, 20, 21, 19, 14, 4, -8, -19, -25, -26, -25, -21, -17, -12, -7, -2, 1, 5, 9, 13, 15, 16, 16, 13, 7, 0, -7, -12, -15, -14, -11, -6, -1, 3 },
+	{ 30, 30, 30, 30, 29, 29, 29, 29, 27, 24, 18, 11, 3, -3, -9, -12, -15, -17, -21, -26, -32, -39, -45, -51, -55, -57, -56, -53, -44, -31, -14, 0, 13, 21, 26, 29, 30 },
+	{ 21, 22, 22, 22, 22, 22, 22, 22, 21, 18, 13, 5, -3, -11, -17, -20, -21, -22, -23, -25, -29, -35, -40, -44, -45, -44, -40, -32, -22, -12, -3, 3, 9, 14, 18, 20, 21 },
+	{ 16, 17, 17, 17, 17, 17, 16, 16, 16, 13, 8, 0, -9, -16, -21, -24, -25, -25, -23, -20, -21, -24, -28, -31, -31, -29, -24, -17, -9, -3, 0, 4, 7, 10, 13, 15, 16 },
+	{ 12, 13, 13, 13, 13, 13, 12, 12, 11, 9, 3, -4, -12, -19, -23, -24, -24, -22, -17, -12, -9, -10, -13, -17, -18, -16, -13, -8, -3, 0, 1, 3, 6, 8, 10, 12, 12 },
+	{ 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 0, -6, -14, -20, -22, -22, -19, -15, -10, -6, -2, -2, -4, -7, -8, -8, -7, -4, 0, 1, 1, 2, 4, 6, 8, 10, 10 },
+	{ 9, 9, 9, 9, 9, 9, 8, 8, 7, 4, -1, -8, -15, -19, -20, -18, -14, -9, -5, -2, 0, 1, 0, -2, -3, -4, -3, -2, 0, 0, 0, 1, 3, 5, 7, 8, 9 },
+	{ 8, 8, 8, 9, 9, 9, 8, 8, 6, 2, -3, -9, -15, -18, -17, -14, -10, -6, -2, 0, 1, 2, 2, 0, -1, -1, -2, -1, 0, 0, 0, 0, 1, 3, 5, 7, 8 },
+	{ 8, 9, 9, 10, 10, 10, 10, 8, 5, 0, -5, -11, -15, -16, -15, -12, -8, -4, -1, 0, 2, 3, 2, 1, 0, 0, 0, 0, 0, -1, -2, -2, -1, 0, 3, 6, 8 },
+	{ 6, 9, 10, 11, 12, 12, 11, 9, 5, 0, -7, -12, -15, -15, -13, -10, -7, -3, 0, 1, 2, 3, 3, 3, 2, 1, 0, 0, -1, -3, -4, -5, -5, -2, 0, 3, 6 },
+	{ 5, 8, 11, 13, 15, 15, 14, 11, 5, -1, -9, -14, -17, -16, -14, -11, -7, -3, 0, 1, 3, 4, 5, 5, 5, 4, 3, 1, -1, -4, -7, -8, -8, -6, -2, 1, 5 },
+	{ 4, 8, 12, 15, 17, 18, 16, 12, 5, -3, -12, -18, -20, -19, -16, -13, -8, -4, -1, 1, 4, 6, 8, 9, 9, 9, 7, 3, -1, -6, -10, -12, -11, -9, -5, 0, 4 },
+	{ 3, 9, 14, 17, 20, 21, 19, 14, 4, -8, -19, -25, -26, -25, -21, -17, -12, -7, -2, 1, 5, 9, 13, 15, 16, 16, 13, 7, 0, -7, -12, -15, -14, -11, -6, -1, 3 },
 };
 
 static float get_lookup_table_val(unsigned lat, unsigned lon);