Filters

This section defines the filter parameters that can be applied to vector layers. You can filter the elements of a layer by configuring a filter. Items that do not match the filter criteria are not displayed.

1	Check the box to enable the filter. Items that do not pass the filter are not displayed in the layer. You can disable the filter without deleting it.
2	Attributes that make up the filter. Each attribute has an operator and an attribute value. Operators vary depending on the attribute type.
3	Click the icon to add another attribute to the filter.

The icon next to the layer name indicates that a filter is enabled. The filter can be disabled by unchecking the corresponding box. In this case all the elements of the layer are displayed and the icon indicates that a filter is configured for the layer.

Filter operators

equals: This operator filters a layer's elements to display the elements whose attribute value (regardless of its type) is equal to one of the values selected by the JMap administrator or JMap Pro user.

does not equal: This operator filters a layer's elements to display the elements whose attribute value (regardless of its type) is different from the values selected by the the JMap administrator or JMap Pro user.

greater than: This operator filters a layer's elements to display the elements whose attribute value (numeric or date) is greater than the value selected by the JMap administrator or JMap Pro user.

greater or equal to: This operator filters a layer's elements to display the elements whose attribute value (numeric or date) is greater than or equal to the value selected by the JMap administrator or JMap Pro user.

less than: This operator filters a layer's elements to display the elements whose attribute value (numeric or date) is less than the value selected by the JMap administrator or JMap Pro user.

less or equal to: This operator filters a layer's elements to display the elements whose attribute value (numeric or date) is less than or equal to the value selected by the JMap administrator or JMap Pro user.

contains: This operator filters a layer's elements to display the elements whose attribute value (text) contains the value selected by the JMap administrator or JMap Pro user.

does not contain: This operator filters a layer's elements to display the elements whose attribute value (text) does not contain the value selected by the JMap administrator or JMap Pro user.

is empty: This operator filters a layer's elements to display the elements whose attribute (text) does not have a value.

is not empty: This operator filters a layer's elements to display the elements whose attribute (text) has a value.

is null: This operator filters a layer's elements to display the elements whose attribute value (regardless of its type) is null.

is not null: This operator filters a layer's elements to display the elements whose attribute value (regardless of its type) is not null.

is between: This operator filters a layer's elements to display the elements whose attribute value (numeric or date) is within the range defined by the two values entered by the JMap administrator or JMap Pro user.

is not between: This operator filters a layer's elements to display the elements whose attribute value (numeric or date) is not within the range defined by the two values entered by the JMap administrator or JMap Pro user.

last: This operator filters a layer's elements to display the elements whose date attribute value is within the range (expressed in years, months, week(s), day(s), hour(s)) defined by the JMap administrator or JMap Pro user.

interval: This operator filters a layer's data based on time ranges defined using a start date, an end date and a reference date. The user therefore has a tool to display data that varies over time.

The layer must contain at least two date and/or timestamp attributes, one of these being the start Date/Time, and the other being the end Date/Time. The values of these dates can be NULL to indicate a start date that goes a long way back or an end date that is very far in the future.

A reference date is also needed. This date can be a specific date (in the past or in the future) or a current Date/Time, which indicates the present moment.

Only layer elements whose reference date is between the start and end date are displayed in the map.

The following figure illustrates this filter.