Digimap Workbook

ISS & Leeds University Library: Digimap: an introduction to digital map data of Great Britain Page 1 of 31

Digimap: an introduction to digital map data of Great Britain

Contents Pages Aims

2

About this workbook

2

Prerequisites

3

1. Logging into the Digimap Collections

6

2. Roam: making a map

8

3. Carto: making a map

12

4. Postcode Query: viewing an area

16

5. MasterMap Download: downloading, uncompressing, and opening data in MapInfo Professional

17

6. Data Download: downloading, converting, and opening data in MapInfo Professional

20

7. Historic Digimap: viewing, printing and downloading historic maps

23

8. Geology Digimap: viewing a geological map and downloading data

28

9. Further help

30

Appendix: Ordnance Survey National Grid

31


02/11/2011

Digimap: an introduction to digital map data of Great Britain Digimap is a collection of EDINA services which provide digital map data of Great Britain (GB) and high quality cartographic products direct to the desktop.

Aims This workbook contains a number of tasks and activities which will introduce you to the Digimap Collections. By the end of this workbook you will be able to:

use Roam to make a digital map displaying a selection of features use Carto to create maps of different scales and from more than one dataset print a map and download maps for printing use the Postcode Query tool to view an area of your choice use MasterMap Download to download data, then uncompress the data, then open the data in MapInfo

Professional use Data Download to download data, then convert the data, then open the data in MapInfo Professional use Historic Digimap to view, print and download historic maps from 1843 to 1996 use Geology Digimap to view geological maps and download data know where to get further help with using the Digimap Collections

About this workbook

Things that you need to type are displayed in Courier New bold font.

Users should be able to follow the instructions relating to the Digimap Collections, regardless of their location. In those exercises where specific software is used, menu entries are given relating to the ISS Cluster Desktop.


02/11/2011

Prerequisites To use the Digimap Collections you will need to register using your ISS username and password.

Registering for the Digimap Collections

Registering for the Digimap Collections Step 1

Click on the Login button on the Digimap Collections login page at: http://edina.ac.uk/digimap

Step 2 You will be presented with the following screen:

Start to type Leeds then select University of Leeds from the resulting list.


02/11/2011

Step 3 You will then see the ISS Accounts user login screen:

Enter your username and password and click on the Login button. Step 4 Your details will be authenticated and you will be taken to the Digimap home page. If you select Ordnance Survey Collection or Geology Digimap from the Map and Data Collections section, you will be taken to the EDINA Digimap: Web registration page as access to these two collections requires individual user registration. If you select Historic Digimap from the Map and Data Collections section, you will be taken straight to the Historic Digimap collection as this collection does not require individual user registration.

NOTE: If you wish to go through all the exercises in this workbook, you will first need to register for both the Ordnance Survey Collection and Geology Digimap. So, either select Ordnance Survey Collection or Geology Digimap. Read through the information on the EDINA Digimap: Web registration page, including the TERMS OF USE, and click on the Continue button at the bottom to start the registration process. You will then see a registration form to complete:


02/11/2011

Enter your details in the boxes and click the Submit button, taking care to enter your email address correctly. Your registration will take up to two working days to be processed. When your account is active, EDINA will notify you by email.


02/11/2011

1. Logging in to the Digimap Collections Exercise 1.a:

Go to the Digimap Collections login page at: http://edina.ac.uk/digimap

Information about service availability is displayed in the white message box in the centre of the page. Click the purple Login button. (If you are presented with a UK Access Management Federation screen from which to choose your organization, then select The University of Leeds from the list.) You will then be presented with the ISS Accounts user login page. Enter your ISS username and password into the appropriate boxes and then click the Login button. Your details will be authenticated and you will be taken to the Digimap home page. We are going to look at the Ordnance Survey Collection in the Map and Data Collections section. Click on this title and you will then be presented with the copyright statement page:


02/11/2011

Read the copyright notice carefully and click on the copyright terms and conditions link. This launches the Digimap: Ordnance Survey Data Sub-licence Agreement page which shows the full terms and conditions. Click your browsers Back button to return to the copyright notice, then click on the green button to acknowledge your agreement to the copyright statement. You will then be presented with the Digimap Ordnance Survey Collection home page. On this page, look at the lower left section; you will see a box containing your name and the date of your last visit. Keep an eye on the date you last visited as this will help you to detect unauthorised use of your account. The main area of this page includes options for the following services: Roam; Carto; Data Download, Mastermap Download, Boundary Download, Gazetteer Download, Gazetteer Query; Gazetteer Plus; Postcode Query; Unlock and Web Map Services (for advanced users).


02/11/2011

2. Roam: making a map In this section you will learn how to use Roam to make a basic digital map. Digimap Roam enables you to view and print maps using Ordnance Survey data at one of 12 predefined scales. PDF files can be generated in A4 or A3 size and in landscape or portrait orientation. Exercise 2.a: Making a basic map

From the Digimap Ordnance Survey Collection home page, select Roam by clicking on the icon or the blue text of the title:

On the next screen you will see the Roam interface.

Under the Task Menu on the left-hand side of the screen, click on Search. Enter a place name and then click on Find. If there is more than one match for your place name, then search results will appear beneath the Search box. Select the area that you want to view and then the map should automatically update in the map window. Try panning around on the map by either, clicking and dragging the map, or by using the Navigation control tool.

Note the View of your map by examining the top left corner of your map window:


02/11/2011

Now try using the Zoom slider to zoom in and out of your map.

Zooming in and out of your map, will change the View, or pre-defined map scale. There are 12 different Views: National; Regional; County; Metropolitan; City; District; Local Plus, Local; Neighbourhood; Street; Detailed; and Plan. Map content can also be controlled. Five of the views in Roam (Metropolitan, City, District, Detailed and Plan) allow you to customise the features on the map. The data in these map views is in vector format which allows selection of features. The other views cannot be customised because the data is in raster format. Click the Map Content Control tab in the Task Menu. Switch features on or off by checking or un-checking the boxes next to the feature names.

Exercise 2.b: Printing and saving a map

Roam allows you to create printable PDF maps in A4 and A3 size and in portrait or landscape orientation.

Click on the Print button above the map to open the print options in a new window:


02/11/2011

Enter a map title: this will appear on the printed map. Select the page size and layout using the drop down menus. Click Generate Print File. This will produce a PDF file which you can save or print. You will be presented with a File Download dialog box.

If you click on Open, then your PDF document will be displayed in Adobe Reader if this is set up as the default program for viewing PDF files. You can then print a copy of this map by clicking on File > Print. A Print dialog box opens. Select a printer and click on OK. If you click on Save, you will be presented with a Save As dialog box. Choose a location to save your file to, then click on Save. When the file has downloaded and saved, click Close in the Download window.

Exercise 2.c: Viewing and printing a PDF file

Open Adobe Reader by clicking on Start > All Programs > Miscellaneous > Adobe Reader X. In Adobe Reader, click on File > Open. Browse to where you stored your PDF file, select it and then click on Open. A picture of your map should now be displayed. You can print a copy of this map by clicking on File > Print. A Print dialog box opens. Select a printer and then click on OK. Click on File > Exit to close Adobe Reader down.

Exercise 2.d: Help with Roam The next exercise shows you how to get help whilst using the Digimap Ordnance Survey Collection; this includes finding out how you can use Digimap Ordnance Survey Collection maps.


02/11/2011

To get help with Roam, select Help from the blue bar at the top of the page and look at the information available to help you use this service:

From the Roam > How to use Roam left-hand menu, answer the following questions: - What are the three methods of selecting a location for your map? - How many different pre-defined views of maps are there in Roam? - Which Ordnance Survey product is displayed with The Street View? - What does My Maps enable you to do? From the Copyright & Terms of Use left-hand menu, answer the following questions: - Can you include Ordnance Survey Collection maps in a thesis or dissertation? - Can you include Ordnance Survey Collection maps in a poster session? - How many copies of maps downloaded from the Ordnance Survey Collection can you make? When you are ready, click on Close Window to close the Digimap Help window. Click on Home in the top left corner of the screen.


02/11/2011

3. Carto: making a map This task will show you how to use Carto which enables you to make maps to a more detailed specification. Exercise 3.a: Using Carto with the Gazetteer

From the Digimap Ordnance Survey Collection home page, select Carto by clicking on the icon or the blue text of the title:

If, after a few seconds, the following warning displays, then select Run:

Now click on the Start Carto button to launch Carto in a new window. A second security warning may appear. Click on No, as we do not wish to block this Java application.

Please note that sometimes it can take quite a while for Carto to start. Once Carto has opened, click on the Maximise button in the top right-hand corner so that it occupies the full screen:


02/11/2011

Click on the Search tab on the left of the screen, enter a place name of your choice and select Search:

A list of matching place names will appear in the empty pane below. Click once on the correct location and the map will redraw. Then close the Search tab (by clicking on the arrow on the orange background) so that you can see more of the map:

Now you will re-scale your map to show the wider local area. Select 1:50000 from the Scale drop-down menu above the map display. The map automatically redraws to display the new map:


02/11/2011

You will now alter the content of your map. Select the Map Content tab at the left of the screen. In the Available Map Products pane, click on the little circular button next to the words Meridian 2 and Panorama to expand the tree:

Then expand Height data and un-tick the box to turn off the Contours. Click on Redraw Map to redraw the map without contours. Explore the other datasets in the Available Map Products pane and try turning some of the different data elements on and off.

Exercise 3.b: Generating a PDF file Generating a PDF file will help you to achieve higher quality output from the Digimap Ordnance Survey Collection.

Click on Print (at the top of the screen) to launch the Carto: Hardcopy window:


02/11/2011

Do the following:

Choose A4 as the paper size

Enter a title for your map Then click on the Generate Print File option to open the Processing Print File Request window. (If pop-up windows are blocked by your browser, you will need to hold the Control key down whilst clicking on Generate Print File to force the Processing Print File Request window to display.) Right-click on the Save your map link which appears and choose Save Target As from the pop-up menu. In the resulting dialog box, choose a location on your M: drive for your map, then enter a name and click Save. Click Close in the Download complete window and then close the browser window containing the Save your map link. Exit Carto by clicking on Quit and then click on Home in the top left corner of the screen.


02/11/2011

4. Postcode Query: viewing an area Postcode Query lets you enter a specific postcode and then returns a range of attributes for that postcode and a map of the postcode's extent, where applicable. Exercise 4.a: Postcode Query

From the Digimap Ordnance Survey Collection home page, select Postcode Query by clicking on the icon or the blue text of the title:

Enter your own postcode into the search box and click on Go. You will now see a basic map of your area with postcode boundaries. Further information about the postal unit is given on the left-hand side of the screen. Underneath the postcode map, click on Zoom out to open a new window. A map of greater extent will appear to show the wider area and neighbouring postcode units:

Close down the second window and then click on Home in the top left corner of the screen.


02/11/2011

5. MasterMap Download: downloading, uncompressing, and opening data in MapInfo Professional MasterMap Download is a tool for downloading OS MasterMap data for use in GIS or CAD software. OS MasterMap data is delivered in GZip GML format. Depending on which software package you wish to use it in, you may first need to uncompress the gzipped GML data. The following three exercises show you how to select, download, uncompress, and open data in MapInfo Professional. Exercise 5.a: Selecting and downloading your OS MasterMap data

From the Digimap Ordnance Survey Collection home page, select MasterMap Download by clicking on the icon or the blue text of the title:

The download process consists of seven stages:

Selection: You can either choose to select data from the Topography Layer or the Integrated Transport Network (ITN) Layer. For this exercise, click on Select All for the Topography Layer and then click on Continue. Search: You can search for data in seven different ways:

Place name

Postcode

Tile name

Grid ref (National Grid Reference)

Easting/Northing

Latitude/Longitude

Clickable map of Great Britain For this search, in the Place name box, enter the name of your local area and click on Search. Search Results: For this search, the Search Results section asks you to select one of a selection of matched places. (If you were searching on tile name for example, you would be asked to select one of a selection of matched tiles.) Select the place you want and click on Continue. Refine Area: You now need to locate and define your area of interest. You can do this by either specifying a bounding box, or by specifying a centre point and a buffer, or by interactively clicking and dragging the mouse over the map to select a rectangular area. For this exercise, click and drag the mouse over the map to select a region and then click on Continue. Summary: The Summary section shows the content and extent of the data you have requested. You can either order your data immediately or save your data request and then order your data at a later date. Click on Order Request Now for this exercise. Download: The Download section gives you options for how the data will be delivered, including data chunking, archiving and compression. Data over 25km is automatically delivered in smaller files, or chunks. You can specify the size of these chunks. Chunking is available if your data is smaller than 25km if you specify a size. Data files are compressed so as to minimise the time taken to download. Under Windows, it is recommended that you keep Zip archive selected as this gives the quickest download.


02/11/2011

Check that your email address has been correctly recorded, accept the default settings, give your order a name, and click on Extract Data. You will be sent two emails, the first confirming that your order has been received and the second letting you know that your data is ready for download. The second email will contain a code which you will need to enter in to the last section of the MasterMap Download facility. Note that data is available for collection for a maximum of 3 days from the date of this email and that, once you have collected the data, it will be deleted instantly from the server. Your Account: Once you have received email notification that your data is ready for collection, click on the Your Account section of the MasterMap Download facility. In the Retrieve your Data section, enter in the code from the email and click on Get Data. On the MasterMap Download Retrieval screen, right-click on the data file and select Save Target As. In the Save As dialog box, choose a name and location for your data file and click on Save. Click on Close in the Download complete dialog box and then click on Home in the top left corner of the screen. Now open Windows Explorer and navigate to where you saved the data file to. Right-click on the compressed data file and choose Extract All. In the Extract Compressed (Zipped) Folders dialog box, select a folder to extract the data to and click on Extract, making a note of where you extract it to. Your data should now appear with a .gml.gz extension. Notice that, amongst the other files which have been extracted, there is a How_to_get_MasterMap_into_GIS.pdf file which you can read.

Exercise 5.b: Uncompressing your OS MasterMap gzipped GML data using 7-Zip

Open 7-Zip by going to Start > All Programs > Miscellaneous and clicking on the 7-Zip File Manager link.

Navigate to where your .gml.gz data file is stored, select it and click on Extract. In the Extract dialog box, choose where to extract your data to and click on OK. You should now have a .gml data file. Click on File > Exit

to close 7-Zip.

Exercise 5.c: Opening your OS MasterMap GML data in MapInfo Professional (Topography Layer data only)

Open MapInfo Professional by clicking on the MapInfo Professional 10.5 link under the Mapping menu. Click on Cancel on the Quick Start dialog box which appears. To open your OS MasterMap GML data, choose Table > Import and select OS MasterMap (*.gml) in the Files of type section. Navigate to where your .gml data file is stored, select it and click on Open. Choose to import All Layers and Use GML Style and then click on OK. Choose a location for the imported data to be stored in and click on OK.


02/11/2011

If you look in Windows Explorer you will see that a number of sets of files have been created. Within each set of four files, all the files have the same name but different extensions. These are referenced together by the .TAB, or table, file. It is important that files with the same name stay together. Once the data has been imported, click on Window > New Map Window. The Available Layers section of the New Map Window dialog box lists all the mappable tables which are open in MapInfo Professional. Select the first four by holding down either the Shift or Control key whilst selecting. Click on the single right arrowhead button to move these layers to the Layers to Include in Map Window section and then click on OK. A map window will open displaying your map data. To add more layers, select Map > Layer Control and then click on the Add Layers button (at the top left-hand side) in the Layer Control dialog box. Select the remaining layers and then click on OK. You can rearrange the order of the layers by dragging the layers up or down or by using the Move Layers Up and Move Layers Down buttons. Close the Layer Control dialog box by clicking on the Close button at the top right-hand side. To view the full extent of the map data click on Map > View Entire Layer and then OK. To zoom-in or zoom-out use the Zoom-in and Zoom-out buttons on the Main toolbar:

Crown Copyright/database right 2009. An Ordnance Survey/EDINA supplied service.

Click on File > Exit to close MapInfo Professional.

Note: For more information on opening OS MasterMap data in GIS or CAD software, see the Using data in GIS section of the Digimap Help pages, http://edina.ac.uk/mastermap/resources/GISresources.shtml (a GIS Resources page hosted by

EDINA) and http://iss.leeds.ac.uk/info/285/datasets/333/digimap_collections_technical_informati

on/4 (an OS MasterMap Converter Software page hosted locally which includes information on converting

Integrated Transport Network (ITN) Layer data for MapInfo Professional).


02/11/2011

6. Data Download: downloading, converting, and opening data in MapInfo Professional Data Download is a tool for downloading Ordnance Survey data for use in GIS or CAD software. The format the data is delivered in will determine whether you will be able to open it directly in a software package or whether you will first need to convert it. The following three exercises show you how to select, download, convert, and open a data tile in MapInfo Professional. Exercise 6.a: Selecting and downloading your Ordnance Survey data

From the Digimap Ordnance Survey Collection home page, select Data Download by clicking on the icon or the blue text of the title:

The download process consists of five stages:

1. Product/Format: Notice the variety of formats available. The Raster data is only available as compressed TIFF files. The OS VectorMap Local data is only available as GZip GML files and the OS VectorMap District data (non-raster) is only available as SHP files. The OS Land-Form data is available as DXF and NTF files (with the PROFILE and PANORAMA DTM data additionally available as ASC and GeoTIFF files). The OS Meridian 2 and OS Strategi data are available as DXF, NTF and SHP files (with the OS Strategi data additionally available as MID/MIF files). Select the OS Meridian 2 product, NTF. Click on Continue at the bottom of the page. 2. Search: You can search for data in seven different ways:

Place name

Postcode

Tile name

Grid ref (National Grid Reference)

Easting/Northing

Bounding Box

Clickable map of Great Britain For this search, enter a postcode in the Postcode box and click on Search. 3. Search Results: For this search, the Search Results section is skipped and you are taken directly to the Choose Data section. (However, if you were searching on place name for example, you would have been asked to select one of a selection of matched places.) 4. Choose Data: You can choose to download more than one tile (e.g. if your location sits across four tiles, you can either select all four tiles in the Tile list and then click on Show selection on map, or you can select each tile in turn by clicking on the map). Select one tile for this exercise and click on Continue. 5. Download: The Download section shows a summary of your data and gives you options for data archiving and compression (data files are compressed so as to minimise the time taken to download). Under Windows, it is recommended that you keep zip archive selected as this gives the quickest download. Click on Extract Data. Click on the blue text to check the status of your data request. Your extracted files will be listed, there are three files to download. The first two contain the conditions of use of the data and a list of the tiles requested. The last


02/11/2011

file contains the digital map data compressed in a ZIP file. Download all three by right-clicking on each in turn and choosing Save Target As. In the Save As dialog box, choose a name and location for each file, click on Save and then click on Close in the Download complete dialog box. When you are finished, click on Home in the top left corner of the screen. Now open Windows Explorer and navigate to where you saved the files to. Right-click on the compressed data file, Data.zip, and choose Extract All. In the Extract Compressed (Zipped) Folders dialog box, select a folder to extract the data to and click on Extract, making a note of where you extract it to. Your map data should now

appear with a .ntf extension.

Exercise 6.b: Converting your Ordnance Survey NTF data using NTF2MIF

Typically, NTF files will first need converting before they can be opened in a software package. There are various converters available on the ISS Cluster Desktop. They can be found by clicking on Start > All Programs > Mapping. Some of these are also distributed for campus and home computers (see

http://iss.leeds.ac.uk/theitshop). Others are freely available to download from

http://www.dottedeyes.com/spatial_data_loading/interpose/digimap.php and http://www.bodley.ox.ac.uk/guides/maps/translat.htm

For this exercise, you will convert your NTF data into MIF/MID data using NTF2MIF. The MIF/MID format is associated with the GIS software MapInfo Professional. Open NTF2MIF by clicking on the NTF2MIF 3.5 link under the Mapping menu:

Click on Select File(s), navigate to where you stored your NTF file, select it and click on Open. By default, the MIF file field will display a .mif file in the same location and of the same name. You can change this if you wish. Click on Options and explore what is available. For this exercise, accept the defaults and click on Close and then on Translate to perform the conversion. Click on Close to close NTF2MIF. In Windows Explorer, look in the folder where you asked the converted data to be stored. You should see two .mif and two .mid files. It is important that a .mif and a .mid file with the same name stay together.

Exercise 6.c: Opening your Ordnance Survey MIF/MID data in MapInfo Professional

Open MapInfo Professional by clicking on the MapInfo Professional 10.5 link under the Mapping menu. Click on Cancel on the Quick Start dialog box which appears. To open your MIF/MID data, choose Table > Import and then navigate to where your data is stored, select the first .mif file and click on Open. You will now be presented with the name of the .TAB file which MapInfo


02/11/2011

Professional will import the data into. By default, this will be in the same location and of the same name as the .mif file. Click on Save. Repeat this procedure for the second .mif file. If you look in Windows Explorer you will see that two sets of files have been created. Within each set of four files, all the files have the same name but different extensions. These are referenced together by the .TAB, or table, file. As with the MIF/MID data, it is important that files with the same name stay together. Once the data has been imported, click on Window > New Map Window in MapInfo Professional. The Available Layers section of the New Map Window dialog box lists the two mappable tables which are open in MapInfo Professional. Select them both by holding down either the Shift or Control key whilst selecting. Click on the single right arrowhead button to move these layers to the Layers to Include in Map Window section and then click on OK. A map window will open displaying the map data. You can rearrange the order of the layers by selecting Map > Layer Control and then dragging the layers up or down or using the Move Layers Up and Move Layers Down buttons in the Layer Control dialog box. Close the Layer Control dialog box by clicking on the Close button at the top right-hand side. To view the full extent of the map data click on Map > View Entire Layer and then OK:

Crown Copyright/database right 2011. An Ordnance Survey/EDINA supplied service.

Click on File > Exit to close MapInfo Professional.

Note: For more information on opening NTF data in GIS software, see the Using data in GIS sections of the Digimap Help pages and http://iss.leeds.ac.uk/info/285/datasets/333/digimap_collections_technical_informati

on/5 (a NTF Converter Software page hosted locally).


02/11/2011

7. Historic Digimap: viewing, printing and downloading historic maps Exercise 7.a: Viewing a historic map

From the Digimap home page (which can be accessed by clicking on the word Digimap in the top left-hand corner), select Historic Digimap by clicking on the blue text of the title and then select Ancient Roam on the following page:

You will then be presented with the Ancient Roam interface, which has the same look-and-feel as the contemporary Digimap OS Collection Roam interface. The Task menu on the left hand side of the interface is very similar to that of contemporary Roam. In addition to the Task menu in Historic Roam, there is a timeline above the map window. The Timeline shows availability of historical maps for the current location and view level for each decade. The Timeline becomes active when you are viewing historical maps. From the Task menu, click on Search. Enter a place name or postcode of your choice, then click on Find. If there is more than one match for your place name, then search results will appear beneath the Search box. Select the area that you want to view and then the map should automatically update in the map window. Zoom in to a historical map view level (as indicated on the zoom slider). Once the Timeline is activated, decades

that have maps available are highlighted in blue like this . Click the decade you want to view maps for.

Decades that are greyed out like this mean that there are no historical maps available at that location and map view level. You can change location (e.g. by panning) or zoom in/out to a different map view to find out if there are maps available for that decade but at a different location or scale.

The currently selected decade is highlighted in red . Select a different decade to view from the timeline. Try zooming in and out on your map to see how the availability of maps during the decades changes. There is a toolbar displayed above the map providing extra functionality.

You can select to view two maps at a time, to compare the changes to a location over the years.

Click on the second icon in this toolbar which will launch the 2up window. You will be presented with a window like the following, showing two maps side by side, each with their own timeline. You can then change the time for one of your maps, to compare your area over two different timescales.


02/11/2011

Exercise 7.b: Saving a historic map for printing

Click on the Go to 1up view icon (next to the Go to 2up view icon) if you have viewed two maps at once and

then on the Save as image to disk (PNG) icon . This option enables you to create simple images of historical maps, which you can save in PNG file format. A new browser window then opens up containing the image of your map.

Choose the File menu to print your image directly, or right-click on the map, and choose 'Save Image as...' (FireFox) or 'Save Picture As...' (Internet Explorer), to save your image to disk.


02/11/2011

Exercise 7.c: Downloading historic maps

Click back on the Home link to take you back to the Historic Digimap home page. Then click on Historic Download:

to take you to the new Historic Download interface (which is still in Beta stage).

On the first page of the download interface you can choose between the 3 different historical mapping products. Click on the plus sign for the County Series Maps, to expand the product. Two options for download will be presented: 1:2500 Series; or 1:10560 Series. For both Series, you can choose Original Sheets, National Grid Tiles, or both.

Select Original Sheets for the 1:2500 Series. Then click on the Continue button. The Search & Select Tiles page then launches.


02/11/2011

This is the main page of the Historic Download service, where you get to see where data is available and select the tiles or sheets you want to take. Areas with maps available are shaded light blue, darker shades of blue indicate that there are overlapping maps sheets or tiles. In the Search for place name text box, enter your area of interest, e.g. Leeds, then click on Find. Select again from the Search Results if necessary. Click on the Select Tiles button (at the top of the map). The background to the arrow at the left side of the button will change colour to red indicating you are in select mode. Click on a tile in the map. Once selected, a tile will turn red, and will also be listed on the right-hand side of the map. (Clicking on a tile again, will de-select it.) Select one or two tiles of interest to you. Then click Continue to go to the Download page. The Download page of Historic Download allows you to name your order and submit an email address for the order confirmation to be sent to. The page also shows a summary table that allows you to review and alter the list of tiles in your order. Finally you can select your format and archiving options and submit your order. Enter an order name, email address and then confirm the email address. Keep the default format options as tiff, and Zip archive, then click on the Order Data button. Once you have placed your order you will see a message on the screen explaining that you will receive an email when your order is ready, and that you must use the link in the email to retrieve your data. There is also a link to the My Account page where you will be able to check on the status of your order. After receiving the email, click on the link in the email, or copy and paste the link into your browser. You will then see a page with a Download File link on it.


02/11/2011

Click once on the link, and you will be presented with a File Download dialog box. Click on Save. Choose a suitable location for the file, then click on Save. Note that your data has been downloaded in a ZIP file. To uncompress it you will need to repeat the steps taken at the end of Exercise 5.a. Once again, it is important that files with the same name stay together. TIFF files can be inserted in Microsoft Word documents and opened in most drawing and image-editing packages. Geo-referenced TIFF files can also be displayed in their correct geographic location within some GIS software packages.


02/11/2011

8. Geology Digimap: viewing a geological map and downloading data In order to use this collection, some previous knowledge of geological maps and terminology is assumed. The collection uses Ordnance Survey products with British Geological Survey (BGS) data laid over the top. Geology Roam has 12 different pre-defined map scales, or views:

View Geology Map Product Background Map Product Scale

British Isles DiGMapGB-625 Digital Chart of the World (Country Outlines) 1:5 600 000

Mainland DiGMapGB-625 OS Miniscale 1:1 250 000

National DiGMapGB-625 OS Miniscale 1:625 000

Regional DiGMapGB-250 OS Miniscale 1:500 000

Range DiGMapGB-250 OS Miniscale 1:375 000

County DiGMapGB-250 OS Miniscale 1:250 000

District DiGMapGB-250 OS 1:250 000 Colour Raster 1:150 000

Sector DiGMapGB-50 OS 1:250 000 Colour Raster 1:100 000

Division DiGMapGB-50 OS 1:250 000 Colour Raster 1:75 000

Local DiGMapGB-50 OS 1:50 000 Colour Raster 1:50 000

Plot DiGMapGB-50 OS 1:50 000 Colour Raster 1:25 000

Detailed DiGMapGB-50 OS 1:25 000 Colour Raster 1:10 000

Exercise 8.a: Viewing a geological map

From the Digimap home page (which can be accessed by clicking on the words Historic Digimap in the top left-hand corner), select Geology Digimap by clicking on the blue text of the title. You will be presented with the copyright statement page. Read the copyright notice and the copyright terms and conditions carefully, then click on the green button to acknowledge your agreement to the copyright statement. Select Geology Roam from the following page:

Under the Task Menu on the left-hand side of the screen, click on Search. Enter the University of Leeds

postcode (LS2 9JT) into the postcode search box and click on Find.

Note the view of your map, shown in the top left corner of your map screen:

You can use the Zoom slider to zoom in and out of your map. Zooming in and out of your map will change the View, or pre-defined map scale. Click the Map Content Control tab in the Task Menu. Switch features on or off by checking or un-checking the boxes next to the feature names. Feature Information is available for the features on the map (i.e. the coloured areas). Click on the Feature

Information icon at the top of the map . Then click on a coloured part of the map, representing a particular rock. The Feature Information window will then pop up, containing information on the rock at that location: the name of the rock, rock type, age and style.


02/11/2011

To print/save a copy of this map, follow the instructions in Exercise 2b, as for contemporary Roam.

Exercise 8.b: Downloading data for use in MapInfo Professional

Click on Home in the top left-hand corner of the screen to return to the Geology Digimap home page. Click on the blue text of Geology Download:

Select one of the products and choose MID/MIF as the format for this example. Click on Continue. Choose a location by place name, postcode etc. and click on Search. If there is more than one match for your search term then you will need to make a selection from the list in the Search Results section and click on Continue. You will then be able to choose up to four tiles of the surrounding area to download. You can also select different layers (e.g. Bedrock) depending on which product you have chosen. Make a selection and click on Continue. The next screen confirms the details of your selected data; keep the Zip archive compression option selected and click on Extract Data. Depending on the size of your data, it may take a few minutes to be retrieved; click on the Click here to re-check on the status of your request. link to see the progress of your data retrieval. In addition to the data files there are two supporting text files:

1) contents.txt which lists the files requested and the data files extent. 2) conditions.txt which summarises the copyright conditions and terms of use for downloaded data from Geology Digimap. You signed to accept these conditions when you registered to use Geology Digimap.

To download the files, right click on each file name and select Save Target As and then specify where you wish to save the data on your M: drive. After clicking on Save, click on Close in the Download complete dialog box. Follow the instructions in Exercise 6.c to open the MID/MIF file in MapInfo Professional. For further information and help using Geology Digimap, go to the Geology Digimap home page and follow the links on the left-hand side:

Exercise 8.c: Logging out of the Digimap Collections

As this is the last set of exercises, logout of the Digimap Collections by clicking on Log-Out in the top right-hand corner of the page. Note that you must close your web browser to fully log out. If you do not do this, your username and password will remain active on the machine.


02/11/2011

9. Further help

Local Digimap Collections Site Representative: Deborah Allon ([email protected])

Local Digimap Collections Technical Contact: Anna Clough ([email protected])

Library Contact for Printed Maps: Sara Thornes ([email protected])

Digimap Collections Online Help:

Maintained by: Deborah Allon (ISS), Anna Clough (ISS) and Sara Thornes (Library)


02/11/2011

Appendix: Ordnance Survey National Grid The grid is divided up into 100km squares each identified by two letters, e.g. SE.

Each 100km square is divided into 10km squares identified by two letters and two digits, e.g. SE23. Each 10km square is divided into 1km squares identified by two letters and four digits, e.g. SE2934.

On the ISS Cluster Desktop there is an Ordnance Survey Grid Referencing tutorial and a National Grid Converter utility located under the Start > All Programs > Mapping menu.

Date post:	25-Nov-2015
Category:	Documents
Upload:	jjrelucio3748
View:	16 times
Download:	0 times

Digimap Workbook

Documents