1 – Introduction
1 – Introduction
This User Guide provides instructions on how you can use the Catalogue Menu to configure which data products are visible in the map viewer.
The Catalogue Menu functionality allows you to:
- browse through lists of data products available
- read summary information about each product
- add and remove data layers in the map viewer
- zoom to a data layer spatial extent
- add the data to your basket to order
The interface is similar to the Discover page, and presents a list of the Data Collections available through the Geospatial data service.
2 – Accessing the Catalogue Menu
In order to open the Catalogue Menu, you must first be viewing the Map Page of the Geospatial data website. If you are currently viewing a different page of the website, click on the ‘Map’ icon in the top menu banner to view the Map Page:
You can learn more about the general functionality available in the Map Page by reading the Map Page User Guide. Once you are viewing the Map Page of the website, you can open the Catalogue Menu by clicking on the ‘hamburger’ icon (three horizontal lines) in the upper left corner of the map viewer:
Once clicked, the Hamburger Menu interface opens on the left hand side of the screen. Since the Catalogue Menu provides access to the main functionality of the Hamburger Menu, it is displayed by default when the Hamburger Menu is opened:
If another tab is displayed in the Hamburger Menu instead, you can display the Catalogue Menu by simply clicking on the ‘Catalogue’ tab. The Hamburger Menu tabs are always visible, allowing for easy navigation in the interface.
The Catalogue Menu can be closed by clicking on the ‘x’ icon in the top right corner of the menu (above the three tabs):
The menu interface closes and returns to the original hamburger icon in the map viewer.
3 – Browsing the Data
The data is organised into a three-level hierachy:
Data Collection >
Data Group >
These levels are represented within the Catalogue Menu in the same manner as the Discover page – individual data products are nested within data groups, which are nested within the Data Collections. Data Collections appear in the list as dark blue entries, data groups as lighter blue entries, and data products as white.
Clicking on a Data Collection in the Catalogue Menu expands the entry and displays the data groups within that Data Collection:
The ‘Ordnance Survey’ Data Collection has expanded to show all the data groups within it:
Likewise, clicking on a data group expands the entry to show all the data products within it:
The ‘Open Government Licenced (OGL) Data’ group has expanded to show all the data products within it:
Data Collections are collapsed by clicking again on the Data Collection title. Data groups are collapsed by either clicking on the group title or using the downwards facing arrow to the left of each group title:
Using these methods to expand and collapse the three-level entries of the Catalogue menu, you can browse through all the data products available.
4 – Viewing data product summary information
Once you have a list of data products presented, you can learn more about an individual data product by clicking on its title (or the ‘I’ icon) in the list:
This will expand the data product entry and display some additional summary information:
Clicking on the data product ‘I’ icon or title again will collapse the additional summary information.
5 – Adding data to the map
Once you’ve identified a data product which is of interest, if you wish to view the data on the map you can easily do this by using the slider switches that appear in the lists in the Catalogue menu. You can also add data layers to the map from the Discover page, and if this has previously been done they will appear in the Catalogue menu with the switch already in the ‘on’ position. Changing the viewing switches in either the Discover page or the Catalogue menu will also change them in the other interface – there is no priority and the control performs the same from either interface.
The ability to add data to the map is offered at different two levels:
5.1 – Add a data product to the map
To add an individual data product to the map, simply click on the slider switch next to the relevant data product. If you change your mind, click on the switch again to remove that data from the map:
5.2 – Add a data group to the map
You can also add a whole data product grouping to the map at once, by using the slider switch displayed at the data groups header level:
You will see that if you use the group level switch, all the data products within that group will have their switches set automatically.
Note: Sliding a viewing switch to ‘on’ will display the data layer or group on the map. If the new data does not appear on the map, it could be because the layer is being drawn underneath another layer. By default, layers are added to the map in the order in which you select them to be added. The ordering of layers cannot be adjusted in the Data Catalogue Menu, instead this control is within the Layer Manager Menu. Please see the Layer Manager User Guide for more information.
6 – Zoom to layer extent
Every data layer has a bounding box, which represents the maximum extents of the coverage of the data (in map coordinates for north/south/east/west). The ‘zoom to layer extent’ tool adjusts the extent of the map viewer to encompass the bounding box extents of the relevant data layer in which the tool is clicked, which ensures you can view the full extent of the data.
You can access the ‘zoom to layer extent’ tool within the Catalogue menu interface by expanding an individual data product’s entry to show the summary information. Alongside the summary information is the ‘zoom to layer extent’ icon, which looks like a square:
Clicking the ‘zoom to layer extent’ tool will cause the map viewer to automatically zoom and/or pan as necessary to show the full extent of the data layer.
For example, in the screenshot below the data layer being viewed is the ‘OS 1:250,000 Scale Colour Raster’ data product, which has a geographic extent covering the whole of Great Britain. The map view extent is zoomed in to an area of London:
Clicking on the ‘zoom to layer extent’ tool for this data layer in the Catalogue Menu causes the map viewer to automatically zoom out from London to show the full extent of the data product (the full extent of Great Britain):
Note: The ‘zoom to layer extent’ tool functions irrespective of whether the data layer has been added to the map, or is visible (at the top of the layer drawing order) at the time it is clicked.
7 – Add layer to basket
If you’ve found a data product that you wish to order and download, you can do this from the Catalogue menu by using the ‘add layer to basket’ tool.
You can access the ‘add layer to basket’ tool within the Catalogue menu interface by expanding an individual data product’s entry to show the summary information. Alongside the summary information is the ‘add layer to basket’ icon, which looks like a shopping basket:
Clicking on this icon will add the data product to your basket. Note that subsequent clicks on the icon will add additional orders to the basket, rather than cancelling the order.
Once the data product has been added to your basket to order, you will see the following confirmations in the map interface:
- A ‘Layer added to basket’ confirmation message will briefly appear at the bottom of the map viewer:
- An item counter will appear next to the Basket icon on the main menu banner (at the top right of the page):
Progressing an order is discussed further in the Ordering and Downloading Data User Guide.