Data Report
Timezone Data Version: 2026d
Data Statistics
General Metric |
Value |
|---|---|
Total coordinate values (2 per point) |
16,505,010 |
Boundary Polygon Statistics
Boundary Metric |
Value |
|---|---|
Total boundary polygons |
1,355 |
Total boundary coordinates |
7,990,706 |
Total boundary coordinate values (2 per point) |
15,981,412 |
Average coordinates per boundary polygon |
5,897.2 |
Maximum coordinates in one boundary polygon |
193,003 |
Minimum coordinates in one boundary polygon |
3 |
Hole Polygon Statistics
Hole Metric |
Value |
|---|---|
Total hole polygons |
791 |
Total hole coordinates |
261,799 |
Total hole coordinate values (2 per point) |
523,598 |
Average coordinates per hole polygon |
330.97 |
Maximum coordinates in one hole polygon |
24,023 |
Minimum coordinates in one hole polygon |
3 |
Number of boundary polygons with holes |
99 |
Percentage of boundary polygons with holes |
7.31% |
Average holes per boundary polygon (with holes) |
7.99 |
Timezone Statistics
Timezone Metric |
Value |
|---|---|
Total timezones |
444 |
Average boundary polygons per timezone |
3.05 |
Maximum polygons in one timezone |
95 |
Minimum polygons in one timezone |
1 |
Median polygons per timezone |
1 |
Polygons per Timezone Distribution
Number of Polygons |
Number of Timezones |
Percentage |
Example Timezone |
|---|---|---|---|
1 polygon |
280 |
63.06% |
Africa/Abidjan |
2 polygons |
42 |
9.46% |
Africa/Cairo |
3 polygons |
30 |
6.76% |
Africa/Blantyre |
4 polygons |
23 |
5.18% |
America/Anchorage |
5 polygons |
13 |
2.93% |
America/Asuncion |
6 polygons |
7 |
1.58% |
Asia/Anadyr |
7 polygons |
7 |
1.58% |
Africa/Ceuta |
8 polygons |
15 |
3.38% |
America/Caracas |
9 polygons |
4 |
0.9% |
America/Bogota |
10 polygons |
6 |
1.35% |
Europe/Moscow |
11 polygons |
2 |
0.45% |
Atlantic/South_Georgia |
12 polygons |
1 |
0.23% |
Pacific/Honolulu |
13 polygons |
2 |
0.45% |
Asia/Hong_Kong |
14 polygons |
1 |
0.23% |
America/Costa_Rica |
18 polygons |
1 |
0.23% |
Etc/GMT-2 |
21 polygons |
1 |
0.23% |
Asia/Taipei |
22 polygons |
1 |
0.23% |
Europe/Brussels |
23 polygons |
2 |
0.45% |
Asia/Pyongyang |
24 polygons |
1 |
0.23% |
Asia/Tokyo |
25 polygons |
1 |
0.23% |
Australia/Brisbane |
28 polygons |
1 |
0.23% |
Europe/Athens |
35 polygons |
1 |
0.23% |
Asia/Shanghai |
49 polygons |
1 |
0.23% |
Pacific/Tahiti |
95 polygons |
1 |
0.23% |
America/Argentina/Cordoba |
Shortcut Mapping Statistics
Shortcut Index Overview
Shortcut Index Metric |
Value |
|---|---|
Grid |
384 root columns, 4x4 blocks |
Total shortcut entries |
231,798 |
Zone entries (direct lookup) |
180,328 |
Polygon entries (require testing) |
51,470 |
Empty entries |
0 |
Total polygon references |
105,118 |
Root cells |
73,728 |
Root cells refined into blocks |
10,538 |
Cells in the tree |
231,798 |
Cells stored |
231,798 |
Cells missing |
0 |
Coverage ratio |
1.000 |
Unique entry fraction |
0.778 |
Unique surface fraction |
0.778 |
Zone distribution efficiency |
0.778 |
Avg polygons per polygon entry |
2.04 |
Zone storage (KB) |
1584.9 |
Polygon storage (KB) |
607.4 |
Total estimated storage (KB) |
2192.3 |
Storage compression ratio |
0.92x |
Shortcut Entry Distributions
How much work a lookup in one cell costs. A cell covered by a single timezone stores that zone id directly and needs no point-in-polygon test at all; the rest store the candidate polygons a lookup has to test.
No cell needs exactly one test: a single candidate is unambiguous, so it is stored as a direct zone id instead.
Polygons to test |
Frequency |
Relative |
Accumulated |
Remaining |
|---|---|---|---|---|
none (unique zone) |
180328 |
77.8% |
77.8% |
22.2% |
2 |
49597 |
21.4% |
99.19% |
0.81% |
3 |
1768 |
0.76% |
99.95% |
0.05% |
4 |
71 |
0.03% |
99.99% |
0.01% |
5 |
13 |
0.01% |
99.99% |
0.01% |
6 |
6 |
0.0% |
99.99% |
0.01% |
7 |
3 |
0.0% |
99.99% |
0.01% |
8 |
1 |
0.0% |
100.0% |
0.0% |
9 |
1 |
0.0% |
100.0% |
0.0% |
10 |
2 |
0.0% |
100.0% |
0.0% |
11 |
2 |
0.0% |
100.0% |
0.0% |
14 |
1 |
0.0% |
100.0% |
0.0% |
16 |
1 |
0.0% |
100.0% |
0.0% |
18 |
1 |
0.0% |
100.0% |
0.0% |
24 |
1 |
0.0% |
100.0% |
0.0% |
36 |
1 |
0.0% |
100.0% |
0.0% |
47 |
1 |
0.0% |
100.0% |
0.0% |
Timezones in cell |
Frequency |
Relative |
Accumulated |
Remaining |
|---|---|---|---|---|
1 |
180328 |
77.8% |
77.8% |
22.2% |
2 |
49920 |
21.54% |
99.33% |
0.67% |
3 |
1506 |
0.65% |
99.98% |
0.02% |
4 |
40 |
0.02% |
100.0% |
0.0% |
5 |
4 |
0.0% |
100.0% |
0.0% |
Binary File Sizes
File Type |
Size (MB) |
Percentage |
|---|---|---|
boundary polygon data |
30.50 |
98.13% |
hole polygon data |
0.09 |
0.29% |
shortcut index |
0.49 |
1.57% |
Total |
31.08 |
100.00% |