Image Quality & Naming Convention
The information in this document is a guideline to assist the vendor with delivering quality digital images.
Clarity:Digital images should be an image of sufficient quality and clarity for a human to read all of the printed, typed, stamped or handwritten characters on the page with ease and 100 % accuracy. It would be desirable for a machine to read (e.g. to zone, ocr, and index) all of the types of above-mentioned characters as well. This may correspond to 200dpi or 300dpi scans, or a greater resolution depending upon the condition of the analog source.
Format:Images should be provided in an industry standard, open and documented format with widely available and free reader or client software such as tiff, jpeg, or pdf.
Color Depth:Background or unimportant “noise” information that may be desirable to ignore or filter out includes the color of the card or paper stock, creases, dog-ears, punch holes and ink bleed through from adjacent cards. The color of ink or pencil used is generally unimportant, it carries no special meaning, but color information may be occasionally necessary to discern characters that overlap other characters, such as rubber-stamped words on top of printed or handwritten ones.
Each vendor should put the scanned digital images into the following tree structure:
/hrp/vvvv/dddddddddddd/rrrrrrrr.xxx where:
hrp is a constant subdirectory name (refers to historical records project).
vvvv is a four place alphanumeric vendor code. Each vendor has been assigned a vendor code. If you do know what your vendor code is, please contact your LOC point of contact.
dddddddddddd is a unique 12 place alphanumeric code to be based on a) the card catalog drawer number, b) the microfilm box and reel number or c) the year, volume number and page number of a bound ledger. The record books, microfilm, and catalog cards each have a special directory format. Please refer to the examples for more information.
Record Book |
Description |
|
|
|
|
d |
The first character is the record identifier. Use a lower case r when identifying a record book. |
|
dddd |
The next four characters is beginning year of the record book. |
|
ddd |
The next three characters describe the class number. If there is only one letter that begins the class, insert in the first character place. The additional characters are used as fillers and should be substituted with zeros. |
|
dddd |
The last four characters identify the record book volume number. Start numbering from right to left. |
|
Example |
r|1946|KK0|0046 |
Microfilm |
Description |
|
|
|
|
d |
The first character is the record identifier. Use a lower case m when identifying microfilm |
|
dddd |
The next four characters are fillers. Insert zeros into this place holding. |
|
ddd |
The next three characters describe the box number the microfilm reel is housed. Start numbering from right to left. |
|
dddd |
The last four characters identify the microfilm reel number. Start numbering from right to left. |
|
Example |
m|0000|075|1103 |
Card Catalog |
Description |
|
|
|
|
d |
The first character is the record identifier. Use a lower case c when identifying a catalog card. |
|
ddddddd |
The next seven describes the index in the card catalog. See the table below for the appropriate seven-digit code for each index. |
|
dddd |
The last four characters identify the card catalog drawer number from where the image was scanned. |
|
Example |
c| CCC1946|0009 |
Copyright Card Catalog Indexes |
CODES |
|
Applications, 1938-1945 |
APP1938 |
|
Assignments - Assignment Titles |
ASSIGNT |
|
Assignments- Assignor/Assignee |
ASSIGNA |
|
Books, 1898-1937 (Author) |
BOOKA98 |
|
Books, 1898-1937 (Claimant) |
BOOKC98 |
|
Card Catalog, 1946-1954 |
CCC1946 |
|
Card Catalog, 1955-1970 |
CCC1955 |
|
Card Catalog, 1971-1977 |
CCC1971 |
|
Commercial Prints & Labels, 1922-1940 |
CPL1922 |
|
Dramas, 1917-1937 (Claimant) |
DRC1917 |
|
Dramas, 1917-1937 (Title/Author) |
DRT1917 |
|
General Index, 1870-1897 |
GIN1870 |
|
General Index, 1938-1945 |
GIN1938 |
|
Graphic Arts, 1898-1937 (Artist & Title) |
GAA1898 |
|
Graphic Arts, 1898-1937 (Claimant) |
GAC1898 |
|
Music, 1898-1937 (Claimant) |
MUC1898 |
|
Music, 1898-1937 (Title & Composer) |
MUT1898 |
|
N.U. Claimant Apps, 1909-1945 |
NUC1909 |
|
Notice of Intention to Use (1909-1977) |
NUI1909 |
|
Notice of Use, 1909-1937 (Assignments) |
NUA1909 |
|
Notice of Use, 1909-1952 (Title & Claimant) |
NUT1909 |
|
Periodicals, 1898-1909 (Claimant & Title) |
PER1898 |
|
Periodicals, 1909-1937 |
PER1909 |
|
Periodicals, 1919-1941 (Title) |
PER1919 |
|
Pseudonyms Prior to 1938 |
PSE1938 |
|
Renewals, 1909-1937 (Author & Title) |
REA1909 |
|
Renewals, 1909-1937 (Claimants) |
REC1909 |
rrrrrrrr is a unique alphanumeric image identification code, which will be sequenced in the same order as the cards or pages scanned.