Making a Map¶
This tutorial is now obsolete. A new and updated version is available at Making a Map (QGIS3)
Often one needs to create a map that can be printed or published. QGIS has a powerful tool called Print Composer that allows you to take your GIS layers and package them to create maps.
Overview of the task¶
The tutorial shows how to create a map of Japan with standard map elements like map inset, grids, north arrow, scale bar and labels.
Other skills you will learn¶
Using ‘on-the-fly’ CRS transformation to visualize your data in a different projection.
Get the data¶
We will use the Natural Earth dataset - specifically the Natural Earth Quick Start Kit that comes with beautifully styled global layers that can be loaded directly to QGIS.
Download the Natural Earth Quickstart Kit.
Data Source [NATURALEARTH]
Download and extract the Natural Earth Quick Start Kit data. Open QGIS. Click on.
Browse to the directory when you had extracted the natural earth data. You should see a file named
Natural_Earth_quick_start_for_QGIS.qgs. This is the project file that contains styled layers in QGIS Document format. Click Open.
You would see a lot of layers in the table of content and a styled World map in the QGIS canvas. If you see errors displayed at the top of the canvas, click on the cross to close it.
In this tutorial, we will make a map of Japan. Click the Zoom In button and draw a rectangle around Japan to zoom to the area.
You can turn off some map layers for data that we do not need for this map. Un-check the box next to
10m_admin_0_map_unitslayers. Before we make a map suitable for printing, we need to choose an appropriate projection. This dataset comes in Geographic Coordinate System (GCS) where the units are degrees. This is not appropriate for a map where you want the distances to be in kilometers or miles. We need to use a Projected Coordinate System that minimizes distortions for our region of interest and has units in meters. Universal Transverse Mercator (UTM) is a decent choice for a projected coordinate system. It is also global, so it’s a good default that you can rely on and choose a UTM zone that contains your area of interest to minimize distortions for your region. In our case, we will use UTM Zone 54N. Click the CRS Status button at the bottom-right of the QGIS window.
For Japan, Japan Plane Rectangular CS is a projected coordinate reference system (CRS) that is designed for minimum distortions. It is divided in 18 zones and if you are working for a smaller region in Japan, using this CRS will be better.
Check the Enable on-the-fly CRS Transformation box. Type
Tokyo utm zone54nin the Filter search box. Once you see the results, select Tokyo / UTM Zone 54N - EPSG:3095. Click Apply.
Now we can start to assemble our map. Go to.
You will be prompted to enter a title for the composer. You can leave it empty and click Ok.
Leaving the composer name empty will assign a default name such as
In the Print Composer window, click on Zoom full to display the full extent of the Layout. Now we would have to bring the map view that we see in the QGIS Canvas to the composer. Go to .
Once the Add Map button is active, hold the left mouse button and drag a rectangle where you want to insert the map.
You will see that the rectangle window will be rendered with the map from the main QGIS canvas. The rendered map may not be covering the full extent of our interest area. Selectto pan the map in the window and center it in the composer.
Let us adjust the zoom level for the given map. Click on the Item Properties tab and enter 7000000 for Scale value.
Now we will add a map inset that shows a zoomed in view for the Tokyo area. Before we make any changes to the layers in the main QGIS window, check the Lock layers for map item and Lock layer styles for map item boxes. This will ensure that if we turn off some layers or change their styles, this view will not change.
Switch to the main QGIS window. Use the Zoom In button to zoom to the area around Tokyo.
There are some duplicate labels coming from the
ne_10m_populated_placeslayer. You can turn it off for this view.
We are now ready to add the map inset. Switch the the Print Composer window. Go to .
Drag a rectangle at the place where you want to add the map inset. You will now notice that we have 2 map objects in the Print Composer. When making changes, make sure you have the correct map selected. Select the
Map 1object that we just added from the Items panel. Select the Item properties tab. Scroll down to the Frame panel and check the box next to it. You can change the color and thickness of the frame border so it is easy to distinguish against the map background.
One neat feature of the Print Composer is that it can automatically highlight the area from the main map which is represented in our inset. Select the
Map 0object from the Items panel. In the Item properties tab, scroll down to the Overviews section. Click the Add a new overview button.
Map 1as the Map Frame. What this is telling the Print Composer is that it must highlight our current object
Map 0with the extent of the map shown in the
Now that we have the map inset ready, we will add a grid and zebra border to the main map. Select the
Map 0object from the Items panel. In the Item properties tab, scroll down to the Grids section. Click the Add a new grid button.
By default, the grid lines use the same units and projections as the currently selected map projections. However, it is more common and useful to display grid lines in degrees. We can select a different CRS for the grid. Click on the change… button next to CRS.
In the Coordinate Reference System Selector dialog, enter
4326in the Filter box. From the results, select the
WGS84 EPSG:4326as the CRS. Click OK.
Select the Interval values as
5degrees in both X and Y direction. You can adjust the Offset to change where the grid lines appear.
Scroll down to the Grid frame section and select a frame style that suits your taste. Also check the Draw coordinates box.
Adjust the Distance to map frame till the coordinates are legible. Change the Coordinate precision to
1so the coordinates are displayed only upto the first decimal.
Now we will add a North Arrow to the map. The Print Composer comes with a nice collection of map-related images - including many types of North Arrows. Click.
Holding your left mouse button, draw a rectangle on the top-right corner of the map canvas. On the right-hand panel, click on the Item Properties tab and expand the Search directories section and select the North Arrow image of your liking.
Now we will add a scale bar. Click on.
Click on the layout where you want the scalebar to appear. In the Item Properties tab, make sure you have chosen the correct map element for which to display the scalebar. Choose the Style that fit your requirement. In the Segments panel, you can adjust the number of segments and their size.
It is time to label our map. Click on.
Click on the map and draw a box where the label should be. In the Item Properties tab, expand the Label section and enter the text as shown below. We can enter the text as HTML as well. Check the box Render as Html so the composer will interpret the HTML tags.
<div align=center> <h1>Map of Japan</h1> </div>
Similarly add another label to add the data and software credits.
Once you are satisfied with the map, you can export it as Image, PDF or SVG. For this tutorial, let’s export it as an image. Click.
Save the image in the format of your liking. Below is the exported PNG image.