Update about the Map Comparison Tool from the Visualising Urban Geography Project

A few days ago, I blogged about the new map comparison tool from the Visualising Urban Geography project and lamented the lack of provision for maps outside Edinburgh.

Chris Fleet, Senior Map Curator at the National Library of Scotland has kindly pointed out that if I pan to the area of the country in which I'm interested, if there are geo-referenced maps available for that area, they will appear in the list and can be selected.

I've tried this out, and it works. However, I've also discovered that the map availability doesn't appear until you've zoomed in to an appropriate level.

So, for example, starting from the initial view of the dual map tool, I zoom out 4 times to pan quickly to Jedburgh, and zoom in 4 times, the Jedburgh town plan of 1858 appears in the list and can be selected. Note that if the area of your view is outside the area on a specific map, that map won't appear in the list. So if know a map should be available (see the list of geo-referenced maps in the Map Library) but doesn't appear in the list, try panning around and zooming in or out.

Of course, as I mentioned before, there aren't many geo-referenced maps for the Borders, however the view below shows the expansion of Kirkcaldy, Fife.

New Map Comparison Tool from the Visualising Urban Geography Project

There's a new tool from the Visualising Urban Geography project that allows you to compare two different maps of Edinburgh side by side on the screen.

We've always had the capability to do this manually using two paper maps but it's very laborious and not very easy to compare like with like.

This new tool uses geo-referenced maps which are overlaid on top of the current street map, and you can decide which maps to compare.

For family historians, this has several great benefits; you can see, at a glance:

• how streets have developed since the previous map
• where new buildings are
• where streets have disappeared
• which streets have been renamed

and that will make it easier than ever to look at census records, view the route taken by the census enumerator, and go directly to the site of an ancestor's dwelling, and if you're lucky the actual dwelling itself.

Also, I think it will be helpful when looking at valuation rolls to see what a street looked like before or after.

The picture shows an area of Spring Gardens, Edinburgh. Notice how a bit of land to the right of St Ann's Bank House in the top map (1849) has become a row of buildings, Violet Bank, in the bottom map (1876).

Have a go at using the dual map tool, yourself, and let me know what you think.

If you want to change map when you're in the tool, click the [clear overlay] link to remove the map, then click the new map you want.

Of course, the great drawback for us is that it allows only the comparison of Edinburgh maps, however, as it has been done for Edinburgh, it presumably can be done for other places, too; and that's another great reason to get on with the geo-referencing of historical maps.