forked from ChelseaKR/perimeter
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathperimeters-coverage.json
More file actions
1562 lines (1562 loc) · 41.4 KB
/
Copy pathperimeters-coverage.json
File metadata and controls
1562 lines (1562 loc) · 41.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
{
"acre_thresholds": {
"by_decade": [
{
"acres_recorded": 1,
"below": {
"10": 0,
"300": 0,
"50": 0
},
"decade": 1870,
"records": 1
},
{
"acres_recorded": 7,
"below": {
"10": 0,
"300": 0,
"50": 0
},
"decade": 1890,
"records": 7
},
{
"acres_recorded": 70,
"below": {
"10": 2,
"300": 39,
"50": 13
},
"decade": 1900,
"records": 70
},
{
"acres_recorded": 1324,
"below": {
"10": 73,
"300": 774,
"50": 236
},
"decade": 1910,
"records": 1324
},
{
"acres_recorded": 1479,
"below": {
"10": 81,
"300": 748,
"50": 233
},
"decade": 1920,
"records": 1479
},
{
"acres_recorded": 1157,
"below": {
"10": 108,
"300": 694,
"50": 270
},
"decade": 1930,
"records": 1157
},
{
"acres_recorded": 1155,
"below": {
"10": 70,
"300": 564,
"50": 226
},
"decade": 1940,
"records": 1155
},
{
"acres_recorded": 1819,
"below": {
"10": 122,
"300": 737,
"50": 320
},
"decade": 1950,
"records": 1819
},
{
"acres_recorded": 1276,
"below": {
"10": 99,
"300": 627,
"50": 316
},
"decade": 1960,
"records": 1276
},
{
"acres_recorded": 1879,
"below": {
"10": 270,
"300": 1138,
"50": 622
},
"decade": 1970,
"records": 1879
},
{
"acres_recorded": 2206,
"below": {
"10": 184,
"300": 1291,
"50": 568
},
"decade": 1980,
"records": 2206
},
{
"acres_recorded": 1992,
"below": {
"10": 179,
"300": 1170,
"50": 571
},
"decade": 1990,
"records": 1992
},
{
"acres_recorded": 2905,
"below": {
"10": 265,
"300": 2018,
"50": 1139
},
"decade": 2000,
"records": 2905
},
{
"acres_recorded": 3429,
"below": {
"10": 843,
"300": 2734,
"50": 1929
},
"decade": 2010,
"records": 3429
},
{
"acres_recorded": 2558,
"below": {
"10": 705,
"300": 2112,
"50": 1598
},
"decade": 2020,
"records": 2558
},
{
"acres_recorded": 77,
"below": {
"10": 0,
"300": 43,
"50": 7
},
"decade": null,
"records": 77
}
],
"note": "Counts of surviving records below each acreage named in FRAP's published current collection criteria. These are not the criteria that applied in every earlier era, and a record below a threshold is not an error; the count is here so a reader can see how close each decade's records sit to the cutoffs FRAP names.",
"thresholds": [
10,
50,
300
]
},
"duplicate_signals": [
{
"description": "Records sharing one IRWIN ID. IRWIN is the federal incident identifier, so a repeat means two perimeter records point at one federal incident.",
"distinct_keys": 3618,
"key": "irwin_id",
"keyed_records": 3633,
"records_sharing_a_key": 23,
"reused_keys": 8
},
{
"description": "Records sharing a fire year, reporting unit and local incident number. Local incident numbers repeat between units by design, so the unit is part of the key; without it this count would be inflated by unrelated fires.",
"distinct_keys": 9644,
"key": "year_unit_incident_number",
"keyed_records": 9901,
"records_sharing_a_key": 376,
"reused_keys": 119
},
{
"description": "Records sharing a fire year, fire name and GIS acreage rounded to the nearest acre.",
"distinct_keys": 16561,
"key": "year_name_acres",
"keyed_records": 16596,
"records_sharing_a_key": 66,
"reused_keys": 31
}
],
"earliest_year": 1878,
"fields": [
{
"explicit_unknown": 0,
"label": "Year",
"marker_basis": "none",
"markers": {},
"name": "YEAR_",
"not_recorded": 77,
"note": "Fire year. Records with no year are counted in their own cohort and are never folded into a year that would then appear larger than it is.",
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 23257,
"present_tenths_pct": 997,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "IRWIN ID",
"marker_basis": "none",
"markers": {},
"name": "IRWINID",
"not_recorded": 19701,
"note": "Linkage to the federal IRWIN incident record. FRAP's own release notes describe the new Global ID field as covering records 'pre-dating IRWIN IDs', so an absent IRWIN ID on an older record is expected rather than anomalous.",
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 3633,
"present_tenths_pct": 156,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "Alarm date",
"marker_basis": "none",
"markers": {},
"name": "ALARM_DATE",
"not_recorded": 5384,
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 17950,
"present_tenths_pct": 769,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "Containment date",
"marker_basis": "none",
"markers": {},
"name": "CONT_DATE",
"not_recorded": 12618,
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 10716,
"present_tenths_pct": 459,
"total": 23334
},
{
"explicit_unknown": 85,
"label": "Fire name",
"marker_basis": "inferred",
"markers": {
"n/a": 72,
"none": 1,
"unknown": 12
},
"name": "FIRE_NAME",
"not_recorded": 6583,
"note": "A small number of records carry a marker word where the name goes. Counting those as names would put a fire called N/A on a map. FIRE_NAME is published as free text with no coded-value domain, so these three markers are read off the file rather than off a documented vocabulary.",
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 16666,
"present_tenths_pct": 714,
"total": 23334
},
{
"explicit_unknown": 12469,
"label": "Local incident number",
"marker_basis": "inferred",
"markers": {
"00000000": 12469
},
"name": "INC_NUM",
"not_recorded": 955,
"note": "An all-zeros incident number stands in a large share of records. INC_NUM is published as free text with no coded-value domain, so nothing documents 00000000 as a placeholder and this reading is inferred from the file. The inference is what the distribution supports: the all-zeros value is shared by records spanning 64 reporting units, 115 distinct fire years and nine agencies, and it thins out as recorded numbers appear, from every record before 1940 to a single record in the 2020s. A local incident number names one incident within one unit, so reading it as an identifier would put dozens of unrelated fires in one unit and one year on a single incident.",
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 9910,
"present_tenths_pct": 425,
"total": 23334
},
{
"explicit_unknown": 3623,
"label": "Fire number (historical use)",
"marker_basis": "inferred",
"markers": {
"00000000": 3620,
"<null>": 3
},
"name": "FIRE_NUM",
"not_recorded": 6190,
"note": "Carries the literal text <Null> in a few records, and an all-zeros placeholder in several thousand more. Both are markers written into the cell rather than empty cells, and both are counted apart from recorded numbers. FIRE_NUM has no published domain, so both readings are inferred. One record carries a bare 0 rather than the padded form and is counted as a recorded number; see docs/MARKERS.md, which leaves that single record alone rather than extending the inference to a shape the file uses once.",
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 13521,
"present_tenths_pct": 579,
"total": 23334
},
{
"explicit_unknown": 10514,
"label": "Cause",
"marker_basis": "published",
"markers": {
"14": 10514
},
"name": "CAUSE",
"not_recorded": 0,
"note": "Code 14 is the published 'Unknown / Unidentified' value. It is a recorded determination that the cause is unknown, not an empty cell.",
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 12820,
"present_tenths_pct": 549,
"total": 23334
},
{
"explicit_unknown": 15081,
"label": "Collection method",
"marker_basis": "published",
"markers": {
"8": 15081
},
"name": "C_METHOD",
"not_recorded": 0,
"note": "Code 8 is the published 'Unknown' value. FRAP's firep25_1 release notes record that 12,097 fires' collection methods were edited from null to Unknown, which moves cells between two of the three states this project counts.",
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 8253,
"present_tenths_pct": 354,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "Management objective",
"marker_basis": "none",
"markers": {},
"name": "OBJECTIVE",
"not_recorded": 271,
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 23063,
"present_tenths_pct": 988,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "Reporting agency",
"marker_basis": "none",
"markers": {},
"name": "AGENCY",
"not_recorded": 48,
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 23286,
"present_tenths_pct": 998,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "Unit",
"marker_basis": "none",
"markers": {},
"name": "UNIT_ID",
"not_recorded": 60,
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 23274,
"present_tenths_pct": 997,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "State",
"marker_basis": "none",
"markers": {},
"name": "STATE",
"not_recorded": 0,
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 23334,
"present_tenths_pct": 1000,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "GIS calculated acres",
"marker_basis": "none",
"markers": {},
"name": "GIS_ACRES",
"not_recorded": 0,
"note": "Derived from the stored polygon, so it is the one geometry-dependent field available without downloading geometry.",
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 23334,
"present_tenths_pct": 1000,
"recorded_zero_values": 0,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "Complex name",
"marker_basis": "none",
"markers": {},
"name": "COMPLEX_NAME",
"not_recorded": 22716,
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 618,
"present_tenths_pct": 26,
"total": 23334
},
{
"explicit_unknown": 1,
"label": "Complex ID",
"marker_basis": "inferred",
"markers": {
"00000000": 1
},
"name": "COMPLEX_ID",
"not_recorded": 22750,
"note": "One record carries the all-zeros form. The field has no published domain and mixes short alphanumeric codes, braced GUIDs and zero-padded numbers, so this reading is inferred by analogy with the same shape in INC_NUM and FIRE_NUM rather than from anything documented.",
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 583,
"present_tenths_pct": 25,
"total": 23334
},
{
"explicit_unknown": 0,
"label": "Decade",
"marker_basis": "none",
"markers": {},
"name": "DECADES",
"not_recorded": 5270,
"outside_published_domain": 0,
"outside_published_domain_distinct": 0,
"outside_published_domain_values": {},
"present": 18064,
"present_tenths_pct": 774,
"total": 23334
}
],
"irwin_id_present": 3633,
"irwin_id_present_tenths_pct": 156,
"is_fixture": false,
"latest_year": 2025,
"marker_counterfactuals": [
{
"description": "The same key as above, recomputed with the all-zeros local incident number read as a number rather than as a placeholder. Published as the counterfactual for that judgment call, not as a count of duplicate fires.",
"distinct_keys": 12028,
"key": "year_unit_incident_number_placeholder_read_as_a_number",
"keyed_records": 22361,
"records_sharing_a_key": 12230,
"reused_keys": 1897
}
],
"measurement": "Completeness of the FRAP historical fire perimeter record",
"records": 23334,
"records_without_year": 77,
"source": {
"acquired_bytes": 7964688,
"acquired_record_count": 23334,
"acquired_sha256": "9be7bcb9c08f6813ba13263eabebc96256f0ea8fb0e809ad8a4171046466a16a",
"caveats": [
{
"measured_as": "Records per fire year, published as counts of what is present, with no year interpolated and no year invented for a record that carries none.",
"quote": "Although the dataset represents the most complete digital record of fire perimeters in California, it is still incomplete, and users should be cautious when drawing conclusions based on the data.",
"topic": "Completeness"
},
{
"measured_as": "Records per decade counted against each acreage named in the published collection criteria, so a reader can see how much of each decade sits near the cutoffs.",
"quote": "This data should be used carefully for statistical analysis and reporting due to missing perimeters (see Use Limitation in metadata). Some fires are missing because historical records were lost or damaged, were too small for the minimum cutoffs, had inadequate documentation or have not yet been incorporated into the database.",
"topic": "Missing perimeters"
},
{
"measured_as": "The 10, 50 and 300 acre thresholds are the ones counted against, and they are labelled as the current criteria rather than applied backwards to eras whose cutoffs this project has not established.",
"quote": "CAL FIRE (including contract counties) submit perimeters ≥10 acres in timber, ≥50 acres in brush, or ≥300 acres in grass, and/or ≥3 impacted residential or commercial structures, and/or caused ≥1 fatality. All cooperating agencies submit perimeters ≥10 acres.",
"topic": "Collection criteria"
},
{
"measured_as": "Counts of records sharing an identifier or an identifying combination, published as candidates. Over-generalization is a property of the polygons, which this project does not download and does not assess.",
"quote": "Other errors with the fire perimeter database include duplicate fires and over-generalization. Additionally, over-generalization, particularly with large old fires, may show unburned “islands” within the final perimeter as burned.",
"topic": "Duplicates and generalization"
},
{
"measured_as": "IRWIN ID coverage per year, which shows where the federal identifier begins to appear and how much of each recent year carries one.",
"quote": "A new field, Global ID, was added to provide a unique ID to track all fire records in this dataset including those pre-dating IRWIN IDs.",
"topic": "IRWIN linkage"
},
{
"measured_as": "Collection method counted in three states rather than two, so the cells this edit moved are visible as recorded unknowns instead of disappearing into an apparently complete field.",
"quote": "A count of 12,097 fires' collection methods were edited from Null values to Unknown.",
"topic": "Null to Unknown"
}
],
"endpoint": "https://services1.arcgis.com/jUJYIo9tSA7EHvfZ/arcgis/rest/services/California_Historic_Fire_Perimeters/FeatureServer/0/query",
"key": "frap_perimeters",
"landing_page": "https://data.cnra.ca.gov/dataset/california-historical-fire-perimeters",
"layer": "California Fire Perimeters (all)",
"licence": "Creative Commons Attribution",
"licence_url": "http://www.opendefinition.org/licenses/cc-by",
"publisher": "California Department of Forestry and Fire Protection, Fire and Resource Assessment Program",
"retrieved": "2026-08-07",
"title": "California Historical Fire Perimeters",
"version": "firep25_1"
},
"years": [
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 1,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 1,
"year": 1878
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 1,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 1,
"year": 1895
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 1,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 1,
"year": 1896
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 5,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 5,
"year": 1898
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 12,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 12,
"year": 1900
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 1,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 1,
"year": 1902
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 2,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 2,
"year": 1903
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 1,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 1,
"year": 1905
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 4,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 4,
"year": 1906
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 10,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 10,
"year": 1907
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 16,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 16,
"year": 1908
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 24,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 24,
"year": 1909
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 90,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 90,
"year": 1910
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 166,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 166,
"year": 1911
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 56,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 56,
"year": 1912
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 84,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 84,
"year": 1913
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 105,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 105,
"year": 1914
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 132,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 132,
"year": 1915
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 131,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 131,
"year": 1916
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 266,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 266,
"year": 1917
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 129,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 129,
"year": 1918
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 165,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 165,
"year": 1919
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 131,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 131,
"year": 1920
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 160,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 160,
"year": 1921
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 116,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 116,
"year": 1922
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 125,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 125,
"year": 1923
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 248,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 248,
"year": 1924
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 91,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 91,
"year": 1925
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 188,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 188,
"year": 1926
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 99,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 99,
"year": 1927
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 167,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 167,
"year": 1928
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 154,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 154,
"year": 1929
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 107,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 107,
"year": 1930
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 215,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 215,
"year": 1931
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 116,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 116,
"year": 1932
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 73,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 73,
"year": 1933
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 132,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 132,
"year": 1934
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 81,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 81,
"year": 1935
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 123,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 123,
"year": 1936
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 59,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 59,
"year": 1937
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 100,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 100,
"year": 1938
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 151,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 151,
"year": 1939
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 88,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 88,
"year": 1940
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 111,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 111,
"year": 1941
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 101,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 101,
"year": 1942
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 114,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 114,
"year": 1943
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 135,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 135,
"year": 1944
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 148,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 148,
"year": 1945
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 102,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 102,
"year": 1946
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 121,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 121,
"year": 1947
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 65,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 65,
"year": 1948
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 170,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 170,
"year": 1949
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 226,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 226,
"year": 1950
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 219,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 219,
"year": 1951
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 172,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 172,
"year": 1952
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 217,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 217,
"year": 1953
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 157,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 157,
"year": 1954
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 171,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 171,
"year": 1955
},
{
"irwin_explicit_unknown": 0,
"irwin_not_recorded": 133,
"irwin_present": 0,
"irwin_present_tenths_pct": 0,
"records": 133,
"year": 1956
},