THL Toolbox > Places & Geography > Map Scanning
Contributor(s): Quentin Devers
When scanning maps in the purpose of cataloguing them in our map database, certain rules need to be followed.
All maps have to bee scanned at the resolution of 400ppi, and be saved as TIFFs.
The TIFF files are intended for archival purposes. In this way, they need to be converted as full quality JPEGs that are then used in THL's website. All scans also have to be converted in five different resolutions: 400ppi, 200ppi, 100ppi, 50ppi and 25ppi. These different resolutions are for the different uses that can be made of the map on internet.
The TIFFs are intended to be archives on our tape storage system. JPEGs have to be uploaded in Blue Unix. More details are to come as for this matter.
When scanning a map you need to make sure to write down all the information about it (publisher, year of publication,…). More details to come about this.
When a map is not in English, its legend need to be translated in English. For this matter also, more details are to come later.
More details to come
Once the map is converted in a 400ppi jpeg file, once its information are converted in a pdf file, and once its legend is also converted in a pdf file, the resulting three files have to be compressed in a zip archive, and uploaded to Blue Unix. More details to come.