X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=ao-tools%2Faltosui%2FAltosSiteMap.java;h=2c5420619eda46a36ae29a1b91eda1a7a371c047;hp=50177d4e84b9a564c16bc64349a58cfd33af3b46;hb=835b903727a2eabda8d9659cc46e53301f92897c;hpb=440a0f3f5130eb0c8e614691892be8c94e7fd3c3

diff --git a/ao-tools/altosui/AltosSiteMap.java b/ao-tools/altosui/AltosSiteMap.java
index 50177d4e..2c542061 100644
--- a/ao-tools/altosui/AltosSiteMap.java
+++ b/ao-tools/altosui/AltosSiteMap.java
@@ -33,8 +33,10 @@ import java.awt.geom.Point2D;
 import java.awt.geom.Line2D;
 
 public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
-	// max vertical step in a tile in naut. miles
-	static final double tile_size_nmi = 1.0;
+	// preferred vertical step in a tile in naut. miles
+	// will actually choose a step size between x and 2x, where this
+	// is 1.5x
+	static final double tile_size_nmi = 1.5;
 
 	static final int px_size = 512;
 
@@ -117,7 +119,7 @@ public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
 			scale_x = 256/360.0 * Math.pow(2, zoom);
 			scale_y = 256/(2.0*Math.PI) * Math.pow(2, zoom);
 			locn = pt(lat, lng);
-			north_step = pt(lat+tile_size_nmi/60.0, lng);
+			north_step = pt(lat+tile_size_nmi*4/3/60.0, lng);
 			if (locn.y - north_step.y > px_size)
 				break;
 		} while (zoom < 22);
@@ -211,10 +213,12 @@ public class AltosSiteMap extends JScrollPane implements AltosFlightDisplay {
 	boolean initialised = false;
 	public void show(AltosState state, int crc_errors) {
 		// if insufficient gps data, nothing to update
-		if (state.gps == null || !state.gps.locked) {
+		if (state.gps == null)
+			return;
+		if (!state.gps.locked) {
 			if (state.pad_lat == 0 && state.pad_lon == 0)
 				return;
-			if (state.ngps < 3)
+			if (state.gps.nsat < 4)
 				return;
 		}