Printing

Extent defined by the user on the fly in Lizmap

To add print capabilities in the online map, you have to create at least one print layout without atlas enabled. Then you will find the list of your layouts in the Layouts plugin tab. They are enabled by default but you can disable it or set permissions for groups.

Примечание

Printing will respect the feature filters and selections.

Creating the layout

In your layout, you can add :

• A map, without an atlas enabled

• An image to North arrow

• An image for the logo of your organization

• A legend that will be fixed for all printing

• Labels

• A scale

  • Either Numeric

  • Or set Fit segment width with a correct reference anchor point to adjust the position of the scale bar

• A location map, a map for which you have enabled and configured one Overview

• Since QGIS 3, you can use QGIS expressions, in your labels for instance. You can create automatic source label according to visible layers following this example on the QGIS documentation.

Dynamic content

You can allow the user to modify the contents of certain labels (title, description, comment, etc). To do this, you need to add an identifier to your label in the layout.

Предупреждение

Each identifier must be unique for the whole layout. Identifiers must be strings, without integers or spaces (e.g. it must be custom_title, nor 1 neither custom title).

Lizmap will automatically ask the user in the web-browser to fill each fields.

Совет

• If your label is pre-populated in QGIS, the field will be pre-populated too in the web-browser.

• If you check „Render as HTML“ for your label in QGIS, you will have a multiline label in Lizmap accepting HTML code. But you will need to <br> for line breaks.

The preview in Lizmap will be similar to this screenshot. The light rectangle is the area the user can define in the web browser. The user can also set the map description and title.

Scales

The print function will be based on the map scales that you set in the plugin Map (Map options — The general options of the map).

Overview

You can create a location map by creating a second map for which you create an overview with the first map as the Map frame. QGIS documentation

Layout with an atlas when using a popup

Read in the popup chapter, Link to a PDF layout using the QGIS Atlas

Allow printing of external baselayers

Предупреждение

This section is now deprecated. You should use the baselayers group provided by the plugin.

The Lizmap plugin Baselayers tab allows you to select and add external baselayers (Base layers — Layers used for the background of the map). These external baselayers are not part of the QGIS project, default print function does not integrate them.

To overcome this lack Lizmap offers an easy way to print a group or layer instead of the external baselayer. To be able to print a layer which is visible in Lizmap Web Client only:

• You need to add the equivalent layer in the QGIS project.

• You need to hide it from the Lizmap legend, see Masking individual layers.

• Rename the layer to one of these names:

  • osm-mapnik for OpenStreetMap

  • osm-stamen-toner for OSM Stamen Toner

  • osm-cyclemap for OSM CycleMap

  • open-topo-map for OpenTopoMap

  • google-satellite for Google Satellite

  • google-hybrid for Google Hybrid

  • google-terrain for Google Terrain

  • google-street for Google Streets

  • bing-road for Bing Road

  • bing-aerial for Bing Aerial

  • bing-hybrid for Bing Hybrid

  • ign-scan for IGN Scan

  • ign-plan for IGN Plan

  • ign-photo for IGN Photos

  • ign-cadastral for IGN Cadastre

In the screenshot above, we can notice the `osm-mapnik` layer in the `hidden` group, which is a TMS layer using https://tiles.openstreetmap.org.

Примечание

The use of this method must be in compliance with the licensing of external baselayers used (Base layers — Layers used for the background of the map).

Предупреждение

If it’s not working, check that your server is able to access to the internet. These base layers are provided online only. Some proxy or firewalls might block some requests to the internet. If your server is behind a proxy, check that QGIS Server is configured with the proxy settings (using the file QGIS3.ini and the section [proxy]). Refer to the QGIS Server documentation for these settings.

To add these layers, you can use existing WMS/WMTS services, XYZ providers (with QuickMapServices), local files…

For IGN baselayers, you can use IGN’s WMS or WMTS url. The key used for this url need to be protected by referer and IP. In referer, you have to indicate your projects page’s URL like this : .*your-url.fr.*. In IP, you have to indicate your Lizmap server’s IP and your computer’s IP (to open IGN’s WMS url in QGIS on your computer). Both IP addresses must be separated by a comma. Beware, if you use IGN WMS or WMTS layers, QGIS project’s EPSG code should be 3857.

Adding your own images in a layout

If you add some custom images in a layout, such as custom North arrow or your organization logo, the server needs to access these images too.

• Either use an image with an URL http:// so that your image is accessible on both your local computer and on the server.

• Or use QGIS expression to build a compatible path on both desktop and server (it should work out of the box, but in case it’s not working, you can use an expression.) :

  1. Put your images in the media directory (see Media), this is not mandatory, you can put it next to your project file.

  2. Use an QGIS expression @project_home || '/media/organization_logo.png'.

  3. Use slash even if you are on Windows.