Store the basezoom/droprate/multiplier decisions in tileset metadata

felt · Dec 16, 2023 · d95990d · d95990d
1 parent c8047de
commit d95990d
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Showing 32 changed files with 52 additions and 4 deletions.
diff --git a/main.cpp b/main.cpp
@@ -2832,7 +2832,7 @@ std::pair<int, metadata> read_input(std::vector<source> &sources, char *fname, i
 		ai->second.maxzoom = maxzoom;
 	}
 
-	metadata m = make_metadata(fname, minzoom, maxzoom, minlat, minlon, maxlat, maxlon, minlat2, minlon2, maxlat2, maxlon2, midlat, midlon, attribution, merged_lm, true, description, !prevent[P_TILE_STATS], attribute_descriptions, "tippecanoe", commandline, strategies);
+	metadata m = make_metadata(fname, minzoom, maxzoom, minlat, minlon, maxlat, maxlon, minlat2, minlon2, maxlat2, maxlon2, midlat, midlon, attribution, merged_lm, true, description, !prevent[P_TILE_STATS], attribute_descriptions, "tippecanoe", commandline, strategies, basezoom, droprate, retain_points_multiplier);
 	if (outdb != NULL) {
 		mbtiles_write_metadata(outdb, m, forcetable);
 	} else {

diff --git a/mbtiles.cpp b/mbtiles.cpp
@@ -601,6 +601,17 @@ void mbtiles_write_metadata(sqlite3 *db, const metadata &m, bool forcetable) {
 		sqlite3_free(sql);
 	}
 
+	if (m.decisions_json.size() > 0) {
+		sql = sqlite3_mprintf("INSERT INTO metadata (name, value) VALUES ('tippecanoe_decisions', %Q);", m.decisions_json.c_str());
+		if (sqlite3_exec(db, sql, NULL, NULL, &err) != SQLITE_OK) {
+			fprintf(stderr, "set decisions: %s\n", err);
+			if (!forcetable) {
+				exit(EXIT_SQLITE);
+			}
+		}
+		sqlite3_free(sql);
+	}
+
 	if (m.vector_layers_json.size() > 0 || m.tilestats_json.size() > 0) {
 		std::string json;
 		json_writer state(&json);
@@ -642,7 +653,7 @@ void mbtiles_write_metadata(sqlite3 *db, const metadata &m, bool forcetable) {
 	}
 }
 
-metadata make_metadata(const char *fname, int minzoom, int maxzoom, double minlat, double minlon, double maxlat, double maxlon, double minlat2, double minlon2, double maxlat2, double maxlon2, double midlat, double midlon, const char *attribution, std::map<std::string, layermap_entry> const &layermap, bool vector, const char *description, bool do_tilestats, std::map<std::string, std::string> const &attribute_descriptions, std::string const &program, std::string const &commandline, std::vector<strategy> const &strategies) {
+metadata make_metadata(const char *fname, int minzoom, int maxzoom, double minlat, double minlon, double maxlat, double maxlon, double minlat2, double minlon2, double maxlat2, double maxlon2, double midlat, double midlon, const char *attribution, std::map<std::string, layermap_entry> const &layermap, bool vector, const char *description, bool do_tilestats, std::map<std::string, std::string> const &attribute_descriptions, std::string const &program, std::string const &commandline, std::vector<strategy> const &strategies, int basezoom, double droprate, double retain_points_multiplier) {
 	metadata m;
 
 	m.name = fname;
@@ -677,6 +688,14 @@ metadata make_metadata(const char *fname, int minzoom, int maxzoom, double minla
 
 	m.strategies_json = stringify_strategies(strategies);
 
+	if (basezoom != maxzoom || droprate != 2.5 || retain_points_multiplier != 1) {
+		m.decisions_json = std::string("{") +
+				   "\"basezoom\":" + std::to_string(basezoom) + "," +
+				   "\"droprate\":" + std::to_string(droprate) + "," +
+				   "\"retain_points_multiplier\":" + std::to_string(retain_points_multiplier) +
+				   std::string("}");
+	}
+
 	if (vector) {
 		{
 			json_writer state(&m.vector_layers_json);

diff --git a/mbtiles.hpp b/mbtiles.hpp
@@ -66,6 +66,7 @@ struct metadata {
 
 	std::string vector_layers_json;
 	std::string tilestats_json;
+	std::string decisions_json;
 };
 
 #include "tile.hpp"
@@ -75,7 +76,7 @@ sqlite3 *mbtiles_open(char *dbname, char **argv, int forcetable);
 void mbtiles_write_tile(sqlite3 *outdb, int z, int tx, int ty, const char *data, int size);
 void mbtiles_erase_zoom(sqlite3 *outdb, int z);
 
-metadata make_metadata(const char *fname, int minzoom, int maxzoom, double minlat, double minlon, double maxlat, double maxlon, double minlat2, double minlon2, double maxlat2, double maxlon2, double midlat, double midlon, const char *attribution, std::map<std::string, layermap_entry> const &layermap, bool vector, const char *description, bool do_tilestats, std::map<std::string, std::string> const &attribute_descriptions, std::string const &program, std::string const &commandline, std::vector<strategy> const &strategies);
+metadata make_metadata(const char *fname, int minzoom, int maxzoom, double minlat, double minlon, double maxlat, double maxlon, double minlat2, double minlon2, double maxlat2, double maxlon2, double midlat, double midlon, const char *attribution, std::map<std::string, layermap_entry> const &layermap, bool vector, const char *description, bool do_tilestats, std::map<std::string, std::string> const &attribute_descriptions, std::string const &program, std::string const &commandline, std::vector<strategy> const &strategies, int basezoom, double droprate, double retain_points_multiplier);
 void mbtiles_write_metadata(sqlite3 *db, const metadata &m, bool forcetable);
 
 void mbtiles_close(sqlite3 *outdb, const char *pgm);

diff --git a/...n%3amin_-Ethemean%3amean_-Etheconcat%3aconcat_-Ethecomma%3acomma_-r1_-K100.json b/...n%3amin_-Ethemean%3amean_-Etheconcat%3aconcat_-Ethecomma%3acomma_-r1_-K100.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/accumulate/out/-z3_-Ethesum%3asum_-Etheproduct%3aproduct_-Ethemax%3amax_-Ethemin%3amin_-Ethemean%3amean_-Etheconcat%3aconcat_-Ethecomma%3acomma_-r1_-K100.json.check.mbtiles",
 "strategies": "[{\"coalesced_as_needed\":78},{\"coalesced_as_needed\":65},{\"coalesced_as_needed\":43},{\"coalesced_as_needed\":17}]",
+"tippecanoe_decisions": "{\"basezoom\":3,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/layer-json/out.mbtiles.json b/tests/layer-json/out.mbtiles.json
@@ -8,6 +8,7 @@
 "maxzoom": "0",
 "minzoom": "0",
 "name": "tests/layer-json/out.mbtiles",
+"tippecanoe_decisions": "{\"basezoom\":0,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/muni/out/-Z11_-z13_-B15.json b/tests/muni/out/-Z11_-z13_-B15.json
@@ -10,6 +10,7 @@
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-B15.json.check.mbtiles",
 "strategies": "[{},{},{},{},{},{},{},{},{},{},{},{\"dropped_by_rate\":4727},{\"dropped_by_rate\":4643},{\"dropped_by_rate\":4210}]",
+"tippecanoe_decisions": "{\"basezoom\":15,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/muni/out/-Z11_-z13_-Bf2000.json b/tests/muni/out/-Z11_-z13_-Bf2000.json
@@ -10,6 +10,7 @@
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-Bf2000.json.check.mbtiles",
 "strategies": "[{},{},{},{},{},{},{},{},{},{},{},{\"dropped_by_rate\":2910},{},{}]",
+"tippecanoe_decisions": "{\"basezoom\":12,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/muni/out/-Z11_-z13_-rf2000.json b/tests/muni/out/-Z11_-z13_-rf2000.json
@@ -10,6 +10,7 @@
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-rf2000.json.check.mbtiles",
 "strategies": "[{},{},{},{},{},{},{},{},{},{},{},{\"dropped_by_rate\":2542},{\"dropped_by_rate\":1547},{}]",
+"tippecanoe_decisions": "{\"basezoom\":13,\"droprate\":1.451034,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/muni/out/-Z11_-z13_-rf2000_-Bg.json b/tests/muni/out/-Z11_-z13_-rf2000_-Bg.json
@@ -10,6 +10,7 @@
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-rf2000_-Bg.json.check.mbtiles",
 "strategies": "[{},{},{},{},{},{},{},{},{},{},{},{\"dropped_by_rate\":2546},{},{}]",
+"tippecanoe_decisions": "{\"basezoom\":12,\"droprate\":2.105500,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/muni/out/-Z11_-z13_-rf2000_-g2.json b/tests/muni/out/-Z11_-z13_-rf2000_-g2.json
@@ -10,6 +10,7 @@
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-rf2000_-g2.json.check.mbtiles",
 "strategies": "[{},{},{},{},{},{},{},{},{},{},{},{\"dropped_by_rate\":1349,\"dropped_by_gamma\":963},{\"dropped_by_rate\":747,\"dropped_by_gamma\":752},{\"dropped_by_gamma\":514}]",
+"tippecanoe_decisions": "{\"basezoom\":13,\"droprate\":1.176223,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/muni/out/-r1_-K20.json b/tests/muni/out/-r1_-K20.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/muni/out/-r1_-K20.json.check.mbtiles",
 "strategies": "[{\"coalesced_as_needed\":4608},{\"coalesced_as_needed\":4608},{\"coalesced_as_needed\":4608},{\"coalesced_as_needed\":4608},{\"coalesced_as_needed\":4608},{\"coalesced_as_needed\":4607},{\"coalesced_as_needed\":4607},{\"coalesced_as_needed\":4606},{\"coalesced_as_needed\":6005},{\"coalesced_as_needed\":5393},{\"coalesced_as_needed\":5012},{\"coalesced_as_needed\":4727},{\"coalesced_as_needed\":4577},{\"coalesced_as_needed\":4003},{\"coalesced_as_needed\":3005}]",
+"tippecanoe_decisions": "{\"basezoom\":14,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/...uni/out/-z11_--retain-points-multiplier_2_--extend-zooms-if-still-dropping.json b/...uni/out/-z11_--retain-points-multiplier_2_--extend-zooms-if-still-dropping.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/muni/out/-z11_--retain-points-multiplier_2_--extend-zooms-if-still-dropping.json.check.mbtiles",
 "strategies": "[{\"dropped_by_rate\":4609},{\"dropped_by_rate\":4609},{\"dropped_by_rate\":4606},{\"dropped_by_rate\":4603},{\"dropped_by_rate\":4594},{\"dropped_by_rate\":4571},{\"dropped_by_rate\":4514},{\"dropped_by_rate\":4372},{\"dropped_by_rate\":5245},{\"dropped_by_rate\":3681},{\"dropped_by_rate\":1012},{}]",
+"tippecanoe_decisions": "{\"basezoom\":11,\"droprate\":2.500000,\"retain_points_multiplier\":2.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/muni/out/-zg_--retain-points-multiplier_2.json b/tests/muni/out/-zg_--retain-points-multiplier_2.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/muni/out/-zg_--retain-points-multiplier_2.json.check.mbtiles",
 "strategies": "[{\"dropped_by_rate\":4609},{\"dropped_by_rate\":4609},{\"dropped_by_rate\":4606},{\"dropped_by_rate\":4603},{\"dropped_by_rate\":4594},{\"dropped_by_rate\":4571},{\"dropped_by_rate\":4514},{\"dropped_by_rate\":4372},{\"dropped_by_rate\":5245},{\"dropped_by_rate\":3681},{\"dropped_by_rate\":1012},{}]",
+"tippecanoe_decisions": "{\"basezoom\":11,\"droprate\":2.500000,\"retain_points_multiplier\":2.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--drop-densest-as-needed.json b/tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--drop-densest-as-needed.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--drop-densest-as-needed.json.check.mbtiles",
 "strategies": "[{\"dropped_as_needed\":168,\"tile_size_desired\":39190},{\"dropped_as_needed\":184,\"tile_size_desired\":25154},{\"dropped_as_needed\":160,\"tiny_polygons\":1,\"tile_size_desired\":21201},{\"dropped_as_needed\":133,\"tile_size_desired\":10758},{\"dropped_as_needed\":58,\"tile_size_desired\":6601},{\"tiny_polygons\":2}]",
+"tippecanoe_decisions": "{\"basezoom\":0,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--drop-fraction-as-needed.json b/tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--drop-fraction-as-needed.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--drop-fraction-as-needed.json.check.mbtiles",
 "strategies": "[{\"dropped_as_needed\":164,\"tile_size_desired\":39190},{\"dropped_as_needed\":187,\"tile_size_desired\":25154},{\"dropped_as_needed\":190,\"tiny_polygons\":1,\"tile_size_desired\":21201},{\"dropped_as_needed\":181,\"tile_size_desired\":10758},{\"dropped_as_needed\":147,\"tile_size_desired\":6601},{\"tiny_polygons\":2}]",
+"tippecanoe_decisions": "{\"basezoom\":0,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--drop-smallest-as-needed.json b/tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--drop-smallest-as-needed.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--drop-smallest-as-needed.json.check.mbtiles",
 "strategies": "[{\"dropped_as_needed\":174,\"tile_size_desired\":39190},{\"dropped_as_needed\":200,\"tile_size_desired\":25154},{\"dropped_as_needed\":187,\"tiny_polygons\":1,\"tile_size_desired\":21201},{\"dropped_as_needed\":154,\"tile_size_desired\":10758},{\"dropped_as_needed\":79,\"tile_size_desired\":6601},{\"tiny_polygons\":2}]",
+"tippecanoe_decisions": "{\"basezoom\":0,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--force-feature-limit.json b/tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--force-feature-limit.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_admin_0_countries/out/-ae_-zg_-M5000_--force-feature-limit.json.check.mbtiles",
 "strategies": "[{\"dropped_as_needed\":479,\"tile_size_desired\":39190},{\"dropped_as_needed\":264,\"tiny_polygons\":2,\"tile_size_desired\":25154},{\"dropped_as_needed\":221,\"tiny_polygons\":2,\"tile_size_desired\":21201},{\"dropped_as_needed\":93,\"tile_size_desired\":10758},{\"dropped_as_needed\":9,\"tile_size_desired\":6601},{\"tiny_polygons\":2}]",
+"tippecanoe_decisions": "{\"basezoom\":0,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/..._110m_populated_places/out/--smallest-maximum-zoom-guess_2_-Bf20_-rf20_-pb.json b/..._110m_populated_places/out/--smallest-maximum-zoom-guess_2_-Bf20_-rf20_-pb.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/--smallest-maximum-zoom-guess_2_-Bf20_-rf20_-pb.json.check.mbtiles",
 "strategies": "[{\"dropped_by_rate\":237},{\"dropped_by_rate\":229},{}]",
+"tippecanoe_decisions": "{\"basezoom\":2,\"droprate\":6.600000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_populated_places/out/--smallest-maximum-zoom-guess_3_-Bg.json b/tests/ne_110m_populated_places/out/--smallest-maximum-zoom-guess_3_-Bg.json
@@ -9,6 +9,7 @@
 "maxzoom": "3",
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/--smallest-maximum-zoom-guess_3_-Bg.json.check.mbtiles",
+"tippecanoe_decisions": "{\"basezoom\":0,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_populated_places/out/--smallest-maximum-zoom-guess_3_-rp.json b/tests/ne_110m_populated_places/out/--smallest-maximum-zoom-guess_3_-rp.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/--smallest-maximum-zoom-guess_3_-rp.json.check.mbtiles",
 "strategies": "[{\"dropped_by_rate\":230},{\"dropped_by_rate\":231},{\"dropped_by_rate\":160},{}]",
+"tippecanoe_decisions": "{\"basezoom\":3,\"droprate\":2.658283,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/...10m_populated_places/out/-r1_-z8_-J_tests%2ffeature-filter%2fplaces-filter.json b/...10m_populated_places/out/-r1_-z8_-J_tests%2ffeature-filter%2fplaces-filter.json
@@ -9,6 +9,7 @@
 "maxzoom": "8",
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-r1_-z8_-J_tests%2ffeature-filter%2fplaces-filter.json.check.mbtiles",
+"tippecanoe_decisions": "{\"basezoom\":8,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_populated_places/out/-yNAME_-z5_-B3.json b/tests/ne_110m_populated_places/out/-yNAME_-z5_-B3.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-yNAME_-z5_-B3.json.check.mbtiles",
 "strategies": "[{\"dropped_by_rate\":227},{\"dropped_by_rate\":227},{\"dropped_by_rate\":152},{},{},{}]",
+"tippecanoe_decisions": "{\"basezoom\":3,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_populated_places/out/-yNAME_-z5_-r1.5.json b/tests/ne_110m_populated_places/out/-yNAME_-z5_-r1.5.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-yNAME_-z5_-r1.5.json.check.mbtiles",
 "strategies": "[{\"dropped_by_rate\":211},{\"dropped_by_rate\":214},{\"dropped_by_rate\":179},{\"dropped_by_rate\":138},{\"dropped_by_rate\":70},{}]",
+"tippecanoe_decisions": "{\"basezoom\":5,\"droprate\":1.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/...M10000_--drop-densest-as-needed_--extend-zooms-if-still-dropping-maximum_2.json b/...M10000_--drop-densest-as-needed_--extend-zooms-if-still-dropping-maximum_2.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-z0_-M10000_--drop-densest-as-needed_--extend-zooms-if-still-dropping-maximum_2.json.check.mbtiles",
 "strategies": "[{\"dropped_as_needed\":219,\"tile_size_desired\":74691},{\"dropped_as_needed\":207,\"tile_size_desired\":44398},{\"dropped_as_needed\":181,\"tile_size_desired\":35126}]",
+"tippecanoe_decisions": "{\"basezoom\":0,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/...t/-z0_-r1_-yNAME_-ySOV0NAME_-yELEVATION_-YNAME%3aCity_-YSOV0NAME%3aCountry.json b/...t/-z0_-r1_-yNAME_-ySOV0NAME_-yELEVATION_-YNAME%3aCity_-YSOV0NAME%3aCountry.json
@@ -9,6 +9,7 @@
 "maxzoom": "0",
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-z0_-r1_-yNAME_-ySOV0NAME_-yELEVATION_-YNAME%3aCity_-YSOV0NAME%3aCountry.json.check.mbtiles",
+"tippecanoe_decisions": "{\"basezoom\":0,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_populated_places/out/-z3_-K20_-r1_-yNAME_-k2.json b/tests/ne_110m_populated_places/out/-z3_-K20_-r1_-yNAME_-k2.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-z3_-K20_-r1_-yNAME_-k2.json.check.mbtiles",
 "strategies": "[{\"coalesced_as_needed\":207},{\"coalesced_as_needed\":174},{\"coalesced_as_needed\":108},{}]",
+"tippecanoe_decisions": "{\"basezoom\":3,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_populated_places/out/-z3_-r1_--limit-tile-feature-count_3.json b/tests/ne_110m_populated_places/out/-z3_-r1_--limit-tile-feature-count_3.json
@@ -9,6 +9,7 @@
 "maxzoom": "3",
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-z3_-r1_--limit-tile-feature-count_3.json.check.mbtiles",
+"tippecanoe_decisions": "{\"basezoom\":3,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/...--limit-tile-feature-count_3_--limit-tile-feature-count-at-maximum-zoom_10.json b/...--limit-tile-feature-count_3_--limit-tile-feature-count-at-maximum-zoom_10.json
@@ -9,6 +9,7 @@
 "maxzoom": "3",
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-z3_-r1_--limit-tile-feature-count_3_--limit-tile-feature-count-at-maximum-zoom_10.json.check.mbtiles",
+"tippecanoe_decisions": "{\"basezoom\":3,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_populated_places/out/-zg_-K20_-r1_-yNAME.json b/tests/ne_110m_populated_places/out/-zg_-K20_-r1_-yNAME.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-zg_-K20_-r1_-yNAME.json.check.mbtiles",
 "strategies": "[{\"coalesced_as_needed\":207},{\"coalesced_as_needed\":174},{\"coalesced_as_needed\":108},{\"coalesced_as_needed\":51}]",
+"tippecanoe_decisions": "{\"basezoom\":3,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/ne_110m_populated_places/out/-zg_-K20_-r1_-yNAME_-kg.json b/tests/ne_110m_populated_places/out/-zg_-K20_-r1_-yNAME_-kg.json
@@ -10,6 +10,7 @@
 "minzoom": "0",
 "name": "tests/ne_110m_populated_places/out/-zg_-K20_-r1_-yNAME_-kg.json.check.mbtiles",
 "strategies": "[{\"coalesced_as_needed\":207},{\"coalesced_as_needed\":174},{\"coalesced_as_needed\":108},{}]",
+"tippecanoe_decisions": "{\"basezoom\":3,\"droprate\":1.000000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tests/stable/out/-z3_-B0.json b/tests/stable/out/-z3_-B0.json
@@ -9,6 +9,7 @@
 "maxzoom": "3",
 "minzoom": "0",
 "name": "tests/stable/out/-z3_-B0.json.check.mbtiles",
+"tippecanoe_decisions": "{\"basezoom\":0,\"droprate\":2.500000,\"retain_points_multiplier\":1.000000}",
 "type": "overlay",
 "version": "2"
 }, "features": [

diff --git a/tile-join.cpp b/tile-join.cpp
@@ -1606,7 +1606,7 @@ int main(int argc, char **argv) {
 		st.maxlon2 = st.maxlon;
 	}
 
-	metadata m = make_metadata(name.c_str(), st.minzoom, st.maxzoom, st.minlat, st.minlon, st.maxlat, st.maxlon, st.minlat2, st.minlon2, st.maxlat2, st.maxlon2, st.midlat, st.midlon, attribution.size() != 0 ? attribution.c_str() : NULL, layermap, true, description.c_str(), !pg, attribute_descriptions, "tile-join", generator_options, strategies);
+	metadata m = make_metadata(name.c_str(), st.minzoom, st.maxzoom, st.minlat, st.minlon, st.maxlat, st.maxlon, st.minlat2, st.minlon2, st.maxlat2, st.maxlon2, st.midlat, st.midlon, attribution.size() != 0 ? attribution.c_str() : NULL, layermap, true, description.c_str(), !pg, attribute_descriptions, "tile-join", generator_options, strategies, st.maxzoom, 2.5, 1);
 
 	if (outdb != NULL) {
 		mbtiles_write_metadata(outdb, m, true);