Libraries & departments -> Data Library Services

Land Information Navigator collection of CD-ROMs

Using the Land Information Navigator cd-roms

1. Locate a large map, entitled "Province of Manitoba Digital Orthophoto Coverage," located in either the GIS office, or at the end of the bays in the Circulation counter area. Look at the large map to identify the correct cd-rom. The bundary of each CD-ROM is indicated by a dark (bold) black line and each has a name, such as Richot1, Richot2, etc. Do not confuse this with the colours, which indicate year of coverage.
2. Once a cd-rom has been identified, try to identify a "tile", the small square boxes on the map. These have very small numbers written on them. If you cannot read the numbers, they can be generated from the lower left coordinate followed to the bottom of the map (xxx) and then followed to the left side of the map (yyyy), i.e. 6305430. See the illustration at the top of the Orthophoto Coverage map.
3. Each tile is made up of four .tif files, arranged: 1 (top left) 2 (top right) 4 (bottom left) 3 (bottom right). For example, the file names on the CD-ROM would then be: 6305431 (upper left), 6305432 (upper right), 6305433 (lower right) and 6305434 (lower left).
4. In order to borrow the approprate cd-rom, look at the Bison Record to get the call number for this cd-rom. Next, it is necessary to borrow the appropriate cd-rom from the circulation counter in Elizabeth Dafoe Library. Make sure that you understand when the cd-rom is due, to avoid paying a fine for returning it late.
5. Find a computer with ArcView software, available on either workstation behind the Reference desk in Elizabeth Dafoe Library (GIS station is much faster), or in either of the two computer labs in Elizabeth Dafoe Library, and place the CD-ROM into the CD-ROM drive.
   _ Double click on the ArcView icon to open the software. - When it asks do you want a new view, click “OK”
   - When is asks if you want to add data now, click “Yes”.
6. Change the Data source type (lower left of the Add Theme Window) to “Image Data Source”
   - Change to the drive where the cd-rom is located (lower right of the Add Theme Window) - For the Data Library Services workstation, the “F” drive is for the cd-rom
   - For the GIS workstation, the “E” drive is for the cd-rom
   

   - Scroll down to find the file (identified above) that represents the area of interest
   - Click once to highlight this file, and then click Open
   

7. By default, the ArcView software does not display a file (layer) unless you tell it to do so, by clicking in the tiny box to the left of the file name on the Table of Contents, on the View window.

   

8. Once the image is displayed on the View window, you can zoom in (magnify) on specific areas.
9. If the image turns out to be wrong, you can open another file without closing this file:
   - Minimize the present view
   - On the project window, click once on View and once on the New button. This should open up an empty window.
   - From the pulldown menus, Click on View, and then on Add Theme
   - Scroll down list of files and select
   - Note that .tif files are quite large, so having more that two or three open will slow down the system. Highlight a view on the Project window and press delete to remove a View.