LCTGM Library of Congress Pictures

[glenrobson]

API details:

http://www.loc.gov/pictures/api#Options_992118639962267_176292_7192582657780896

Full list of subject headings (in XML): https://www.loc.gov/rr/print/tgm1/tgm1.xml

Example JSON response searching on DESCRIPTOR:

http://www.loc.gov/pictures/search/?fi=subject&q=4-H%20clubs&op=PHRASE&va=exact&fo=json

Example response to find number of hits per term:

{"search":{
    "field": "subject", 
    "hits": 132, 
    "sort_order": null, 
    "do_facets": true, 
    "focus_item": null, 
    "query": "4-H clubs", 
    "type": "search", 
    "sort_by": null
},

[glenrobson]

Top 20 results from full harvest of LOC data for every LCTGM field. I've tried to split them into format of the image (e.g. photograph or negative) and subject which is hopefully the content of the image.

Formats:

Id	Term	Public Images	Total Images
tgm007029	Negatives	460,679	483,051
tgm004561	Glass negatives	177,730	178,073
tgm007721	Photographs	147,239	165,379
tgm008237	Prints	110,278	168,536
tgm003973	Film negatives	104,622	126,196
tgm007089	Nitrate negatives	102,759	103,196
tgm009102	Safety film negatives	93,169	98,187
tgm003079	Digital photographs	65,657	65,862
tgm008083	Portrait photographs	65,344	79,950
tgm007718	Photographic prints	59,451	101,311
tgm010140	Stereographs	41,597	43,918
tgm000050	Acetate negatives	40,060	40,136
tgm003379	Dry plate negatives	34,366	34,380
tgm009731	Slides	26,480	29,869
tgm000227	Albumen prints	15,728	16,644
tgm008085	Portraits	12,334	22,475
tgm003279	Drawings	12,227	48,008
tgm005314	Illustrations	11,666	15,535
tgm006027	Lithographs	11,397	15,115
tgm011013	Transparencies	11,116	13,339

Subjects:

Id	Term	Public Images	Total Images
tgm012273	Glass	181,838	182,271
tgm009100	Safety	93,293	98,411
tgm011468	War	29,621	37,151
tgm005025	History	19,954	21,968
tgm005191	Houses	19,741	21,875
tgm003790	Facilities	17,369	18,964
tgm001405	Buildings	17,202	19,720
tgm003413	Dwellings	11,560	12,081
tgm005373	Industry	11,247	13,558
tgm009630	Silver	10,880	14,899
tgm004493	Gelatin	9,755	13,656
tgm011765	Women	8,042	11,970
tgm010824	Time	7,622	7,694
tgm007607	People	7,562	11,060
tgm002053	Churches	7,271	7,983
tgm001966	Children	6,599	9,788
tgm000099	Advertising	6,492	6,658
tgm001333	Bridges	6,405	6,945
tgm007479	Parks	6,386	7,066
tgm009848	Soldiers	5,987	7,090

[glenrobson]

And most importantly:

Hugs:

Id	Term	Public Images	Total Images
tgm005206	Hugging	66	89

[glenrobson]

Todos:

• Update CSVs with full list of images
• Investigate types in subjects like Gelatin and Silver

[glenrobson]

Due to time just limiting these to the first 20 pages, counts are:

term Acetate negatives 433 Albumen prints 433 Digital photographs 423 Drawings 133 Dry plate negatives 438 Film negatives 419 Glass negatives 433 Illustrations 411 Lithographs 417 Negatives 332 Nitrate negatives 253 Photographic prints 431 Photographs 370 Portrait photographs 431 Portraits 378 Prints 366 Safety film negatives 242 Slides 430 Stereographs 430 Transparencies 430

and subjects:

Advertising 367 Bridges 347 Buildings 337 Children 353 Churches 381 Dwellings 397 Facilities 391 Gelatin 434 Glass 418 History 383 Houses 393 Hugging 92 Industry 337 Parks 360 People 369 Safety 309 Silver 409 Soldiers 419 Time 439 War 349 Women 404

Takes about 6mins to get 20 pages for top 20 results from both lists.

[glenrobson]

Totals with 200 pages results:

Types

Acetate negatives 3995 Albumen prints 3967 Digital photographs 4011 Drawings 2421 Dry plate negatives 4018 Film negatives 597 Glass negatives 4013 Illustrations 3232 Lithographs 3424 Negatives 2955 Nitrate negatives 3815 Photographic prints 4000 Photographs 3811 Portrait photographs 3946 Portraits 2756 Prints 3737 Safety film negatives 1985 Slides 2470 Stereographs 3995 Transparencies 4014

Subjects

Advertising 3941 Bridges 3650 Buildings 3558 Children 3374 Churches 3836 Dwellings 3907 Facilities 3817 Gelatin 3735 Glass 3999 History 3724 Houses 3513 Hugging 74 Industry 3204 Parks 3849 People 3752 Safety 1948 Silver 3706 Soldiers 3764 Time 4019 War 3740 Women 3597