reduce the size of downloaded areas so that quests are closer to the …

…user (fixes #1357)

app/src/main/java/de/westnordost/streetcomplete/ApplicationConstants.java

@@ -15,10 +15,10 @@ public class ApplicationConstants
 	public final static Date DATE_OF_BIRTH = new GregorianCalendar(2017,Calendar.FEBRUARY,20).getTime();
 
 	public final static double
-		MAX_DOWNLOADABLE_AREA_IN_SQKM = 50,
-		MIN_DOWNLOADABLE_AREA_IN_SQKM = 4;
+		MAX_DOWNLOADABLE_AREA_IN_SQKM = 20,
+		MIN_DOWNLOADABLE_AREA_IN_SQKM = 1;
 
-	public final static double MIN_DOWNLOADABLE_RADIUS_IN_METERS = 1000;
+	public final static double MIN_DOWNLOADABLE_RADIUS_IN_METERS = 600;
 
 	public final static String DATABASE_NAME = "streetcomplete.db";
 

app/src/main/java/de/westnordost/streetcomplete/data/download/MobileDataAutoDownloadStrategy.java

@@ -30,11 +30,11 @@ public class MobileDataAutoDownloadStrategy extends AActiveRadiusStrategy
 
 	@Override protected int[] getActiveRadii()
 	{
-		return new int[]{400};
+		return new int[]{300};
 	}
 
 	@Override protected int getDownloadRadius()
 	{
-		return 800;
+		return 600;
 	}
 }

app/src/main/java/de/westnordost/streetcomplete/data/download/WifiAutoDownloadStrategy.java

@@ -38,12 +38,12 @@ public class WifiAutoDownloadStrategy extends AActiveRadiusStrategy
 
 	@Override protected int[] getActiveRadii()
 	{
-		// checks if either in 1200 or 400m radius, there are enough quests.
-		return new int[]{1200, 400};
+		// checks if either in 600 or 300m radius, there are enough quests.
+		return new int[]{600, 300};
 	}
 
 	@Override protected int getDownloadRadius()
 	{
-		return 2400;
+		return 1200;
 	}
 }