23 December 2013
What are these bits of maps?
Georeferencing the Library's Goad plans of British and Irish towns is progressing well. I've been asked several times, however, about the miniscule slices of maps that we're asking you to place. What are these obscure and tiny pieces of maps, and how to tell where they are located?Pieces such as above are portions of original paper map sheets as published by Chas. E. Goad Ltd. When a block or other important area extended beyond the bounds of the page, it was simply printed elsewhere on the sheet, with a reference to its location. This was done for reasons of economy; key areas could be included without adding to the cost of paper and printing. In the sheet below, the dark outline indicates an inset, with the block number "8" identifying its location on the main map.
So how can a user of BL Georeferencer know what sheet a bit appears on? All insets are linked to the main map page on which they appear. Choose the "This Map" tab within the Georeferencer application. By clicking "Original web presentation", the bit is shown on the larger map sheet which will include a reference to its location.
These map "bits" are important to place in order to provide the full available mapping of an area! Above image of the Deptford Bridge area of London shows the "bit" adjacent to its location on the main map sheet.
Once properly georeferenced, these small pieces will continue and complete the maps in their correct places - an eloquent solution to the problem of viewing insets on paper maps!
Try out BL Georeferencer if you are up for a visual, geographic, and historic challenge. Locating the remaining pieces is a like solving a Victorian map puzzle!