You can select the layers to display in the map.

To display a layer, you must display the group and the subgroups in which the layer is found.

1. Slide the switch on the group's card from to in order to enable the display of the group.

2. Click on to open the group card and display the layers and subgroups it contains.

3. Slide the switch on the subgroup's card to enable its display. The icon of the subgroup will change color .

   The icon appears in the layers' cards whose display is disabled. No icon appears in layers' cards whose display is enabled.

4. Click on to display the layer. The icon disappears, and the layer is displayed in the map.
5. To disable the display of a layer, bring the mouse pointer to the card of that layer. The icon appears.
6. Click on the icon, which turns to . The layer will no longer be displayed in the map. Its symbol will turn gray.

7. Slide the display switch of the group to this position if you wish to disable the display of all layers comprising this group. Even the layers whose display is enabled will no longer be shown.

Displaying layers based on the map scale

Some layers are configured to be displayed within a given scale interval. Displaying an abundance of small map elements when a small scale is selected (i.e. when the map displays a large territory with few details) can make it very difficult to read the map. Layers that have elements with these characteristics are usually displayed at a larger scale, when the map contains more details on a limited territory.

When a layer is not visible because of the map scale, its name and symbol will appear in very light gray. When you change the scale, these colors will become darker, indicating that the layer appears in the map if its display is enabled.

To display the geographic extent of a layer, even if it is not displayed in the map:

1. Click on and then on Zoom to layer extent. The map automatically displays the area corresponding to the extent of the layer. A rectangle delimiting the extent of the data is displayed for a few moments.

2. Click on if you wish to return to the previous geographic extent.

To perform some functions such as interactively selecting elements of a layer using the selection tools, you must first make the elements of the layer selectable.

1. Pass the cursor over the card of the layer you are interested in to display the icon .

2. Click on to make the layer elements selectable. The icon is permanently displayed in the form.

3. Click on to make the elements of the layer non-selectable. The icon stops displaying and when you pass the cursor over the card, the icon appears.

To display layer information:

1. Click on and then on More information to open the GENERAL panel. Several information are presented there:

   • Number of layer features that are visible on the map. The number varies as you navigate the map.

   • Extent: X and Y indicate the position of the southwest point of the layer, width and height indicate the layer extent in meters from this point.

   • Metadata: information about the data in the layer such as quality indicators, the organization producing the data, update dates, etc. Metadata may be missing.

2. The Transparency function, available for raster data layers, allows you to adjust the transparency level between 0% (default) and 100%.
3. Click on the THEMATIC(S) and/or FILTER(S) tabs to display these panels.

4. Click Back to return to the Layers panel.

Layers can have thematics, the appearance of that layer's elements vary based on one or more attributes.

You can display more than one thematic for a layer at the same time.

To display the THEMATIC(S) panel of the layer:

1. Click the layer icon. The THEMATIC(S) panel displays the legend of the thematics.
2. Use the switch to enable or disable each thematic. The appearance of the icons representing the layer's objects will change according to your choice.

3. You can uncheck one or more classes or categories of the thematic so as not to display on the map the elements of these classes.

4. If the JMap administrator has configured it in this way, the thematic legend can be dynamic, i.e. the legend only shows the classes or categories of the elements displayed in the map. The classes of elements that are not displayed in the map are not shown in the legend. As you navigate the map, the legend changes depending on what is displayed there.

5. Click on or to close or open the thematic's card.

6. Click on Back to return to the Layers panel.

Thematics management

This option is only available for layers that have thematics configured.

The card for each layer contains information such as the name of the layer, the presence of thematics, etc.

To access the available tools, pass the pointer over the card of the layer you are interested in.