Merge pull request #104 from mapbox/always-4096

Use 4096-unit tiles as much as possible to keep GL happy

README.md

@@ -67,8 +67,8 @@ Options
 
  * -z _zoom_: Base (maxzoom) zoom level (default 14)
  * -Z _zoom_: Lowest (minzoom) zoom level (default 0)
- * -d _detail_: Detail at base zoom level (default 12 at -z14 or higher, or 13 at -z13 or lower. Detail beyond 13 has rendering problems with Mapbox GL.)
- * -D _detail_: Detail at lower zoom levels (default 10, for tile resolution of 1024)
+ * -d _detail_: Detail at base zoom level (default 12, for tile resolution of 4096)
+ * -D _detail_: Detail at lower zoom levels (default 12, for tile resolution of 4096)
  * -m _detail_: Minimum detail that it will try if tiles are too big at regular detail (default 7)
  * -b _pixels_: Buffer size where features are duplicated from adjacent tiles. Units are "screen pixels"--1/256th of the tile width or height. (default 5)
 

geojson.c

@@ -26,7 +26,7 @@
 #include "version.h"
 #include "memfile.h"
 
-int low_detail = 10;
+int low_detail = 12;
 int full_detail = -1;
 int min_detail = 7;
 int quiet = 0;
@@ -1274,15 +1274,7 @@ int main(int argc, char **argv) {
 	}
 
 	if (full_detail <= 0) {
-		if (maxzoom >= 14) {
-			// ~0.5m accuracy at z14
-			full_detail = 12;
-		} else {
-			// as good as we can get without breaking GL
-			full_detail = 13;
-		}
-
-		full_detail = 26 - maxzoom;
+		full_detail = 12;
 	}
 
 	if (full_detail < min_detail || low_detail < min_detail) {