Guide to the map images viewer

This viewer allows you to explore all of our map images in detail. With the viewer you can zoom, pan or rotate the map, draw features, and print any part of the map. It is also possible to view the location of the map, link to georeferenced locations, as well as save and copy links to the map or to specific parts of it.

Further information is available on printouts, images and photocopies on our Enquiries & Copies page, as well as on How to order map copies.

Introduction

Our maps viewer gives you:

To zoom in:

To move sideways or pan:

To rotate:

Illustration of rotation graphic

To print / capture screen image

To link to the page or specific view

Show location

When viewing a series map, click on the Show location tab in the footer, to bring up options to view its real-world location:

Illustration of 'Show location' graphic

Show IIIF

This shows the IIIF Image API base URI or info.json for the specific image. This identifier includes details about the specific image, including its width and height in pixels, image format, and the way it is tiled, allowing the image to be easily re-used in other applications. For example, you can copy this info.json URI into other viewers such as Georeferencer (to georeference the image), or into transcription software such as Recogito to record and share annotations. See Awesome - IIIF for a more complete list of tools, resources, and demos using IIIF.

The International Image Interoperability Framework (IIIF) is a group of standard APIs intended to support the sharing and reuse of media.

Drawing Features

Illustration of the dialogue box for drawing features

If you select Draw, it will display a dialogue box on the right with options to draw features, select a colour, edit or delete features and also save the results as an image or JSON file:

  1. Choose a feature type to draw with - a point, line, polygon or circle.
  2. Choose the colour of the feature you want to add. By default this is dark blue. You can click on the colour chart or type numbers into the HEX or R,G,B boxes below. For each feature you choose to draw, you can specify a different colour.
  3. Once you have drawn a feature, you can move it by moving your cursor over the feature and dragging it. It is also possible to delete the last feature you have drawn by selecting the Delete last feature button.
  4. To save the image as a PDF, select Print PDF to the lower left and a PDF will be generated including the features you have drawn. You can also right-click on the map image and choose "Save Image As" to save just the current map view as a .png image. You can also export the features you have drawn as a JSON (Javascript Object Notation) file by selecting Export JSON. The JSON file can be easily edited with a text editor, and it has details of the features you have drawn and their pixel locations. X and Y coordinates of pixel locations are given from the upper left-hand side.

If you wish to trace georeferenced images, so that the features you trace can be overlaid on the real world or used in geographic information software, then please use the Explore Georeferenced Maps - Full Screen/Draw viewer.

Compatible browsers

This viewer is a customised version of the open source IIIF Image API Viewer for OpenLayers 6, and is compatible with all modern standards-compliant web browsers. Viewing but not printing is also possible in Internet Explorer 9.

Please email us if you have any queries about this viewer.

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