All the maps are to be uploaded on the VCP platforms in the following resolution:

• TIFF file in the maximum resolution available: at least 300-400 dpi. * JPEG file at at least 300dpi

These different resolutions are stored in two folders that are named after the format + resolution they contain: “TIFF_300+dpi”, “JPEG_400dpi”. Beside these, maps are also stored in archive files, contained in the folder named “arch” (abbreviation of “archive”). These archive files include for each map: - the actual map in two resolutions:

• TIFF file in the maximum resolution available: at least 300-400 dpi. * JPEG file at at least 300ppi

When a map is in several sheets, all sheets are included in the archive file.

Finally, maps are stored as georectified GIS files. These files go in the “georectified” folder.

Each map is identified by a unique ID that is in the format ID_##_year, where ## represents a number and year represents the year of publication (ex: ID_7_1867, ID_44_1912, ID_51_1949). It is possible to insert information data between the ID number and the year. In this case, it should be inserted as follows: ID_7_Shanghai_1867; ID_51_Saigon-Cholon_1949. Use the dash - sign if necessary to qualify information data (ID_51_Saigon-Cholon_1949; ID_7_Shanghai-English-Setttlement_1867).

When a map is published in different sheets, the number ## in the ID is the same for all the sheets, and they are then differentiated by the addition of letters at the end (ex: ID_7a_1867, ID_7b_1867, ID_7c_1867; etc.). Certain maps that are part of a specific series, like the maps of the place name indexes published in China in the 80s, can be named after the same system as for the maps published in several sheets, i.e., by retaining the same number and adjoining a letter at the end. This is however not to be followed necessarily.

When a map is published with information both on the front and the back, then both files are named after the same number ## in the ID. They are differentiated by the addition of “-front” or “-back” after the ID. Examples: ID_7-front_1867, ID_7-back_1867. Finally, each image has to report its resolution in its name. The rule is to simply add “-##dpi” at the end of the name of the file, where ## represents the resolution of the file. Examples: ID_7_1867-25dpi, ID_44_1912-400dpi . Sometime maps have their legend on a different sheet or page. Therefore there is the need to include a scan of this separate legend as well. The rule to name the scanned legend is to name it after the map adding “-legend” after the ID (ex: ID_44_1912-legend-300dpi).

For the archive files the rule is to include only the highest resolution available in it. Therefore, its name is composed by the ID of the map followed by the resolution of the highest image available. Examples: ID_44_1912-600dpi.

Finally, for the georectified GIS files, we do not indicate the resolution in the name as we work from the highest available and as the resolution is then altered by the GIS software during the georectifying process to fit the GIS needs. However we do keep the “front” and “back” indications, and we add “-georectified” at the end of the name. Exemples: “ID_44_1912-georectified” . Of course, all these names have to be followed by the extension of the file. As of January 2012, images are in .jpg and TIFF, and archives are in .zip.